Two-dimensional gas chromatography information-based oil reservoir exploration and development method and device

Abstract

The present invention provides a two-dimensional gas chromatography information-based oil reservoir exploration and development method and device. By using the two-dimensional gas chromatography information-based oil reservoir exploration and development device provided in the present invention to implement the two-dimensional gas chromatography information-based oil reservoir exploration and development method provided in the present invention, crude oil resource identification, crude oil resource property determination, formation comparison, and evaluation for water flooding degrees of oil layers can be performed. The present invention solves the problems of low accuracy of crude oil property analysis and evaluation conclusions, poor formation comparison effects, complex evaluation techniques for water-flooded layers, high costs, and poor accuracy.

Description

A method and apparatus for reservoir exploration and development based on two-dimensional gas chromatography information Technical Field

[0001] This invention relates to a method and apparatus for reservoir exploration and development based on two-dimensional gas chromatography information, belonging to the field of petroleum geological logging technology. Background Technology

[0002] During reservoir exploration and development, it is necessary to quickly analyze and evaluate the properties of crude oil in the drilled formation. The traditional method is to analyze the combination relationships of alkane components such as methane (C1), ethane (C2), propane (C3), isobutane (iC4), and n-butane (nC4) in the gas logging data to give the crude oil property evaluation conclusion. However, due to the limited information in the gas logging data (C1-C4), the accuracy of the crude oil property analysis and evaluation conclusion is low.

[0003] Furthermore, in order to improve the efficiency of reservoir exploration and development and accurately pinpoint the target strata, traditional methods mainly rely on comparing drilling time data with that of adjacent wells to achieve comparison between the formation being drilled and that of adjacent wells. However, this method is easily affected by drilling process parameters, which can lead to reduced representativeness of drilling time data and difficulty in controlling the formation comparison effect, thus affecting the formation comparison effect.

[0004] Furthermore, as older oilfields enter the later stages of reservoir exploration and development, some wells enter a high water-cut state. To improve the efficiency of oil and gas development, it is necessary to evaluate the water-flooded layer condition. Traditional techniques mainly rely on well logging methods for evaluation. To address the need for water-flooded layer evaluation, the logging industry has developed water-flooded layer logging evaluation technologies based on methods such as nuclear magnetic resonance and pyrolysis chromatography. However, these technologies suffer from problems such as technical complexity, high cost, and poor accuracy. Summary of the Invention

[0005] To address the aforementioned technical problems in the existing technology, the first aspect of this invention provides a method for reservoir exploration and development based on two-dimensional gas chromatography information, comprising:

[0006] Obtain two-dimensional gas chromatographic information of n-alkane from the formation fluid sample of the first well; determine whether the formation to which the formation fluid sample belongs has crude oil resources based on the two-dimensional gas chromatographic information of n-alkane.

[0007] According to an improvement of the present invention, the light-to-weight ratio N of n-alkane is calculated, and the presence of crude oil resources in the formation to which the formation fluid sample belongs is determined based on the light-to-weight ratio N of n-alkane.

[0008] The light-to-heavy ratio N of the n-alkane is calculated based on the two-dimensional gas chromatographic information of the light n-alkane and the heavy n-alkane of the formation fluid sample.

[0009] According to an improvement of the present invention, two-dimensional gas chromatography information of cycloalkanes in formation fluid samples from a first well is obtained, and the light-to-heavy ratio G of cycloalkanes is calculated; the light-to-heavy ratio G of cycloalkanes is calculated based on the two-dimensional gas chromatography information of light cycloalkanes and heavy cycloalkanes in the formation fluid samples.

[0010] The nature of the crude oil resource is determined based on the cycloalkane light-to-heavy ratio G.

[0011] According to an improvement of the present invention, two-dimensional gas chromatography information of monocyclic aromatic hydrocarbons in a formation fluid sample from a first well is obtained, and the light-to-heavy ratio A of the monocyclic aromatic hydrocarbons is calculated; the light-to-heavy ratio A of the monocyclic aromatic hydrocarbons is calculated based on the two-dimensional gas chromatography information of light monocyclic aromatic hydrocarbons and heavy monocyclic aromatic hydrocarbons in the formation fluid sample.

[0012] The nature of the crude oil resource is determined based on the cycloalkane light-to-weight ratio G and the monocyclic aromatic light-to-weight ratio A.

[0013] According to an improvement of the present invention, the two-dimensional gas chromatography information of cycloalkanes in the formation fluid sample of the second well adjacent to the first well is obtained, and the correlation between the two-dimensional gas chromatography information of cycloalkanes in the formation fluid sample of the first well is determined to obtain the formation correlation result between the first well and the second well.

[0014] According to an improvement of the present invention, a determination coefficient is calculated between the two-dimensional gas chromatography information of cycloalkanes in the formation fluid sample of the first well and the two-dimensional gas chromatography information of cycloalkanes in the formation fluid sample of the second well, and the correlation determination is performed.

[0015] According to an improvement of the present invention, the method further includes evaluating the degree of water flooding in the oil reservoir of the first well:

[0016] A water-bearing crude oil sample was collected from the first well, and crude oil and water samples were obtained through oil-water separation.

[0017] Two-dimensional gas chromatographic information of crude oil sample and two-dimensional gas chromatographic information of water sample were obtained, and the water flooding index D of oil layer was calculated.

[0018] The degree of water flooding in the first well is evaluated based on the two-dimensional gas chromatography information of the crude oil sample, the two-dimensional gas chromatography information of the separated water sample, and the oil reservoir water flooding index D.

[0019] According to an improvement of the present invention, the two-dimensional gas chromatographic information of the crude oil sample includes two-dimensional gas chromatographic information of n-alkanes, two-dimensional gas chromatographic information of cycloalkanes, and two-dimensional gas chromatographic information of monocyclic aromatic hydrocarbons of the crude oil sample; and / or

[0020] The two-dimensional gas chromatographic information of the separated water sample includes two-dimensional gas chromatographic information of n-alkanes, cycloalkanes, and monocyclic aromatic hydrocarbons of the separated water sample.

[0021] According to an improvement of the present invention, the hydrocarbon value D of a crude oil sample is calculated. O ;

[0022] The hydrocarbon value D of the crude oil sample O The calculations were based on the two-dimensional gas chromatographic information of n-alkanes, cycloalkanes, and monocyclic aromatics from the crude oil sample.

[0023] According to an improvement of the present invention, the hydrocarbon value D of the separated water sample is calculated. W ;

[0024] The hydrocarbon value D of the separated water sample W The results were calculated based on the two-dimensional gas chromatographic information of n-alkanes, cycloalkanes, and monocyclic aromatics of the separated water sample.

[0025] According to an improvement of the present invention, the reservoir water flooding index D is based on the hydrocarbon value D of the crude oil sample. O and the hydrocarbon value D of the separated water sample W Calculated.

[0026] According to an improvement of the present invention, combined with the hydrocarbon value D of the crude oil sample O The hydrocarbon value D of the separated water sample W The reservoir water flooding index D is used to evaluate the degree of reservoir water flooding in the first well.

[0027] A second aspect of the present invention provides an oil reservoir exploration and development apparatus based on two-dimensional gas chromatography information, the apparatus being used to implement the method provided in the first aspect of the present invention, comprising:

[0028] The two-dimensional gas chromatography information detection module is used to detect the two-dimensional gas chromatography information of n-alkanes, cycloalkanes, and monocyclic aromatics in the formation fluid sample of the first well.

[0029] The data processing module is used to acquire the two-dimensional gas chromatography information of n-alkane, cycloalkanes, and monocyclic aromatic hydrocarbons, perform data processing, and determine the presence and nature of the formation crude oil resources to which the formation fluid sample of the first well belongs.

[0030] The third aspect of the present invention provides the application of the reservoir exploration and development method based on two-dimensional gas chromatography information provided in the first aspect of the present invention or the reservoir exploration and development device based on two-dimensional gas chromatography information provided in the second aspect of the present invention in petroleum geological logging.

[0031] A fourth aspect of the present invention provides a hardware storage device having computer execution instructions stored thereon, which, when executed by a processor, implement the steps of the reservoir exploration and development method based on two-dimensional gas chromatography information as provided in the first aspect of the present invention.

[0032] Compared with the prior art, the advantages of the present invention are as follows:

[0033] 1. By detecting the two-dimensional gas chromatographic information of the formation fluid sample, two-dimensional gas chromatographic information of n-alkanes, cycloalkanes and monocyclic aromatics of the formation fluid sample can be obtained. The acquisition and utilization of information on the numerous components in the formation fluid sample helps to improve the accuracy of the understanding of the crude oil resources in the formation to which the formation fluid sample belongs and the analysis and evaluation conclusions of the crude oil resource properties.

[0034] 2. A creative method is proposed to determine the presence or absence of crude oil resources in the formation to which the formation fluid sample belongs by using two-dimensional gas chromatography information of n-alkane in the formation fluid sample. Specifically, the light-to-weight ratio N of n-alkane is calculated to determine the presence or absence of crude oil resources in the formation fluid sample. This method can make an accurate judgment on the presence or absence of crude oil resources in the formation, so as to guide subsequent exploration and development work such as crude oil resource property evaluation.

[0035] 3. Based on point 2, a method is creatively proposed to determine the properties of the crude oil resources using two technical parameters: the cycloalkane light-to-weight ratio G and the monocyclic aromatic light-to-weight ratio A of the formation fluid samples. This greatly enriches the data information on which the crude oil properties are evaluated. By combining the comprehensive consideration of the cycloalkane light-to-weight ratio G and the monocyclic aromatic light-to-weight ratio A, an accurate evaluation of the crude oil properties can be achieved.

[0036] 4. A creative approach was proposed to calculate the determination coefficient between the two-dimensional gas chromatographic information of cycloalkanes in the formation fluid sample of the first well and the formation fluid sample of the second well adjacent to the first well, and to realize the formation correlation between the first well and the second well by performing correlation determination, thus simplifying the formation correlation process.

[0037] 5. A creative approach was proposed to calculate the hydrocarbon value D of crude oil samples. O Hydrocarbon value D of separated water sample w The method for evaluating the degree of reservoir water flooding using the reservoir water flooding index D only requires determining D. OThe degree of water flooding in the oil reservoir can be obtained from the three technical parameters Dw and D. The evaluation process is simple, low-cost, and highly accurate. It overcomes the shortcomings of existing water flooding layer logging evaluation methods based on nuclear magnetic resonance, pyrolysis chromatography, etc. in the logging industry, which are technically complex, costly, and inaccurate.

[0038] 6. It has achieved automation of sample pretreatment, sample injection, and two-dimensional gas chromatography information detection. The two-dimensional gas chromatography information detection module can automatically perform two-dimensional gas chromatography information detection on the formation fluid in the drilling process in a timely manner. It has also achieved automatic determination of the presence or absence of crude oil resources in the formation to which the formation fluid sample belongs, determination of the nature of crude oil resources, formation correlation, and evaluation of the degree of water flooding in the oil layer. Attached Figure Description

[0039] Figure 1 is a logical schematic diagram of the reservoir exploration and development method based on two-dimensional gas chromatography information provided by a preferred embodiment of the present invention, wherein: 1001-collect formation fluid samples from the first well; 1002-detect and analyze the two-dimensional gas chromatography information of the formation fluid samples; 1003-determine whether there are crude oil resources; 1004-evaluate the properties of crude oil resources; 1005-obtain the two-dimensional gas chromatography information of formation fluid samples from the second well adjacent to the first well; 1006-formation comparison; 1007-determine whether they are the same formation; 1008-water content of the reservoir; 1009-evaluate the degree of water flooding in the oil reservoir.

[0040] Figure 2 is a schematic diagram of the specific structure of the reservoir exploration and development device based on two-dimensional gas chromatography information provided in the embodiment of the present invention, wherein 1-sample pretreatment module, 2-automatic injection module, 3-one-dimensional gas chromatography column, 4-modulation module, 5-modulation column, 6-two-dimensional gas chromatography column, 7-control module, 8-display module, 9-information output module, and 10-chassis.

[0041] Figure 3 shows the determination coefficient r in application example 2. 2 The automatically calculated result.

[0042] The above figures are not drawn to actual size and scale. Detailed Implementation

[0043] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0044] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0045] For ease of description, some nouns or terms appearing in the embodiments of the present invention will be described in detail below.

[0046] n-Alkanes: Straight-chain alkanes in which carbon atoms are arranged in a straight line in their molecular structure.

[0047] Cycloalkanes: Saturated hydrocarbons whose molecular structure contains alicyclic structures.

[0048] Monocyclic aromatic hydrocarbons: Aromatic hydrocarbons whose molecular structure contains a benzene ring.

[0049] Alkanes: specifically branched alkanes.

[0050] Bicyclic aromatic hydrocarbons: Aromatic hydrocarbons whose molecular structure contains two benzene rings.

[0051] Two-dimensional gas chromatography: Full two-dimensional gas chromatography.

[0052] Correlation: A statistical concept.

[0053] The two-dimensional gas chromatographic information of n-alkanes referred to in this invention refers to the content of various n-alkanes in formation fluid samples, distinguished by the number of carbon atoms. The two-dimensional gas chromatographic information of cycloalkanes referred to in this invention refers to the content of various cycloalkanes in formation fluid samples, distinguished by the number of carbon atoms. The two-dimensional gas chromatographic information of monocyclic aromatic hydrocarbons referred to in this invention refers to the content of various monocyclic aromatic hydrocarbons in formation fluid samples, distinguished by the number of carbon atoms. All contents referred to in this invention are mass percentages, specifically understood as follows: taking the total mass of all hydrocarbon components extracted by the extractant in the formation fluid sample as 100%, the content of any extracted hydrocarbon component is the percentage of the mass of that extracted hydrocarbon component relative to the total mass of all hydrocarbon components extracted by the extractant in the formation fluid sample.

[0054] The exemplary definitions of light / heavy n-alkanes, light / heavy cycloalkanes, and light / heavy monocyclic aromatics in this invention are as follows:

[0055] No more than C 20The n-alkanes are light n-alkanes; the number of carbon atoms is not less than C. 21 n-Alkanes are heavy n-alkanes; the number of carbon atoms is not higher than C1. 20 The cycloalkanes are light cycloalkanes; the number of carbon atoms is not less than C10. 21 The cycloalkanes are heavy cycloalkanes; the number of carbon atoms is no higher than C1. 12 The monocyclic aromatic hydrocarbon is a light monocyclic aromatic hydrocarbon; the number of carbon atoms is not less than C. 13 Monocyclic aromatic hydrocarbons are heavy monocyclic aromatic hydrocarbons.

[0056] The following uses the total carbon number range of n-alkanes as C9-C9. 40 The carbon number range of light n-alkanes is C9-C6. 20 The carbon number range of heavy n-alkanes is C. 21 -C 40 The total carbon number range of cycloalkanes is C9-C6. 40 Light cycloalkanes have a carbon number range of C9-C6. 20 The carbon number range of heavy cycloalkanes is C. 21 -C 40 The total carbon number range of monocyclic aromatic hydrocarbons is C7-C6. 17 Light monocyclic aromatic hydrocarbons have a carbon number range of C7-C6. 12 The carbon number range of heavy monocyclic aromatic hydrocarbons is C. 13 -C 17 The technical solution of the present invention will be described in detail using examples.

[0057] It should be noted that the various carbon number ranges involved in this invention do not constitute a limitation of the invention. In practical applications, those skilled in the art can make appropriate adjustments to the above-mentioned carbon number ranges based on the composition of the formation fluid sample and the detection results of two-dimensional gas chromatography.

[0058] It should also be noted that the selection of the extraction solvent is existing technology, and this invention does not specifically limit the type of extraction solvent. Generally, commercially available organic solvents capable of extracting at least n-alkane, cycloalkane, and monocyclic aromatic hydrocarbon components from formation fluid samples can be used as extraction solvents in this invention. This invention does not limit the technical means of achieving oil-water separation in water-bearing crude oil samples. Any technical means capable of achieving oil-water separation in water-bearing crude oil samples (e.g., settling or centrifugation) can be used in this invention.

[0059] Example 1

[0060] This invention provides an oil reservoir exploration and development apparatus based on two-dimensional gas chromatography information, which is used to implement the oil reservoir exploration and development method based on two-dimensional gas chromatography information provided by this invention.

[0061] Figure 2 is a schematic diagram of the structure of the reservoir exploration and development device based on two-dimensional gas chromatography information provided in the embodiment of the present invention. The reservoir exploration and development device based on two-dimensional gas chromatography information provided in the embodiment of the present invention will be described in detail below with reference to Figure 2.

[0062] An oil reservoir exploration and development device based on two-dimensional gas chromatography information is used to implement an oil reservoir exploration and development method based on two-dimensional gas chromatography information. The device includes: a two-dimensional gas chromatography information detection module for detecting two-dimensional gas chromatography information of n-alkanes, cycloalkanes, and monocyclic aromatics in a formation fluid sample from a first well; and a data processing module (not shown in Figure 2) for acquiring the two-dimensional gas chromatography information of n-alkanes, cycloalkanes, and monocyclic aromatics, performing data processing, and determining the presence and nature of crude oil resources in the formation to which the formation fluid sample from the first well belongs.

[0063] In this embodiment of the invention, the two-dimensional gas chromatography information detection module is further used to detect the two-dimensional gas chromatography information of n-alkanes, cycloalkanes, and monocyclic aromatics of the formation fluid sample from the second well adjacent to the first well; correspondingly, the data processing module is further used to acquire the two-dimensional gas chromatography information of cycloalkanes of the formation fluid sample from the second well adjacent to the first well, perform data processing, and determine whether the formation to which the formation fluid sample from the first well belongs and the formation to which the formation fluid sample from the second well belongs are the same formation.

[0064] In this embodiment of the invention, the two-dimensional gas chromatography information detection module is also used to detect the two-dimensional gas chromatography information of the crude oil sample and the two-dimensional gas chromatography information of the separated water sample of the first well; correspondingly, the data processing module is also used to acquire the two-dimensional gas chromatography information of the crude oil sample and the two-dimensional gas chromatography information of the separated water sample, perform data processing, and evaluate the degree of water flooding in the oil reservoir of the first well; wherein, the crude oil sample and the separated water sample are obtained by oil-water separation processing of the water-bearing crude oil sample of the first well.

[0065] In this embodiment of the invention, the two-dimensional gas chromatography information detection module includes a sample pretreatment module 1, an automatic sample injection module 2, a one-dimensional gas chromatography column 3, a modulation module 4, a modulation column 5, a two-dimensional gas chromatography column 6, and an information quantification processing module (not shown in Figure 2).

[0066] The sample pretreatment module 1 is used to automatically and quantitatively extract the sample to be tested and the extractant for extraction to obtain the extracted sample; the automatic injection module 2 is used to automatically and quantitatively inject the extracted sample into the one-dimensional gas chromatography column 3 for primary component separation; the one-dimensional gas chromatography column 3 is used to perform primary component separation on the extracted sample, separating at least three categories of components: n-alkane components, cycloalkane components, and monocyclic aromatic components; the modulation module 4 is used to control the modulation column 5, using the modulation column 5 to modulate each category of components to obtain modulated components; the two-dimensional gas chromatography column 6 is used to perform secondary component separation on each modulated component. The separation process involves separating at least the following components: n-alkane components classified by carbon number, cycloalkane components classified by carbon number, and monocyclic aromatic hydrocarbon components classified by carbon number. An information quantification module is used to perform information quantification processing on each of the following components to obtain two-dimensional gas chromatographic information for the n-alkane, cycloalkane, and monocyclic aromatic hydrocarbon components, respectively, to obtain the two-dimensional gas chromatographic information for the n-alkane, cycloalkane, and monocyclic aromatic hydrocarbon components of the sample to be tested. The sample to be tested is a formation fluid sample from the first well, a formation fluid sample from the second well, a crude oil sample, or a separated water sample.

[0067] In this embodiment of the invention, the reservoir exploration and development device based on two-dimensional gas chromatography information further includes a control module 7, and the data processing module and the information quantification processing module are both solidified on the control module 7; furthermore, the reservoir exploration and development device based on two-dimensional gas chromatography information also includes a display module 8, an information output module 9 and a chassis 10.

[0068] Among them, the control module 7 is used to control the two-dimensional gas chromatography information detection module, data processing module, display module 8 and information output module 9; the display module 8 and information output module 9 are used to display and output various two-dimensional gas chromatography information, calculation results of various parameters and various judgment and evaluation results, respectively; the chassis 10 is used to house the two-dimensional gas chromatography information detection module, data processing module, control module 7, display module 8 and information output module 9.

[0069] Example 2

[0070] The following section, in conjunction with Figure 1, details the steps of the reservoir exploration and development method based on two-dimensional gas chromatography information provided in the embodiments of the present invention. Furthermore, in conjunction with Figure 2, the process of implementing the reservoir exploration and development method based on two-dimensional gas chromatography information provided in the embodiments of the present invention using the reservoir exploration and development device based on two-dimensional gas chromatography information provided in Example 1 is described in four parts.

[0071] Part One

[0072] This invention provides a method for reservoir exploration and development based on two-dimensional gas chromatography information, including: obtaining two-dimensional gas chromatography information of n-alkanes from a formation fluid sample from a first well; and determining whether the formation to which the formation fluid sample belongs has crude oil resources based on the two-dimensional gas chromatography information of n-alkanes.

[0073] First, a suitable amount (e.g., 500 mL) of formation fluid sample from the first well is collected and placed into a sample bottle. Then, under the control of the control module 7: the sample pretreatment module 1 automatically and quantitatively extracts (e.g., 20 mL) of the formation fluid sample from the first well from the sample bottle and injects it into the extraction bottle. Next, it automatically and quantitatively extracts (e.g., 80 mL) of the extractant from the extractant container and injects it into the extraction bottle, mixing and extracting it with the formation fluid sample from the first well to obtain the extracted sample. The automatic injection module 2 automatically and quantitatively extracts (e.g., 5 μL) of the extracted sample and injects it into the one-dimensional gas chromatography column 3 for primary component separation, separating at least three categories of components: n-alkane components, cycloalkane components, and monocyclic aromatic components. At least the obtained components classified according to n-alkane components, cycloalkane components, and monocyclic aromatic components are separated. The three categories of components, distinguished by the fractions of n-alkane and monocyclic aromatic hydrocarbons, are respectively transferred to modulation column 5. Modulation module 4 controls modulation column 5 to modulate each category of component, resulting in modulated components. Each modulated component is then transferred to a two-dimensional gas chromatography column 6 for secondary component separation, at least separating various n-alkane components, various cycloalkane components, and various monocyclic aromatic hydrocarbon components according to carbon number. At least these components are then transferred to an information quantification processing module for information quantification processing, obtaining the two-dimensional gas chromatographic information (e.g., C9-C9) of the formation fluid sample from the first well. 40 The content of various n-alkanes), and two-dimensional gas chromatography information of cycloalkanes (e.g., C9-C). 40 The content of various cycloalkanes) and two-dimensional gas chromatographic information of monocyclic aromatic hydrocarbons (e.g., C7-C6). 17 The content of various monocyclic aromatic hydrocarbons).

[0074] Next, under the control of control module 7, the data processing module automatically calculates the light-to-heavy ratio N of n-alkane. The light-to-heavy ratio N of n-alkane is calculated according to the following expression based on the two-dimensional gas chromatography information of light n-alkane and heavy n-alkane of the formation fluid sample:

[0075] Where, n 9-10 n 11-15 n 16-20 n 21-25 n 26-30 n 31-35 n 36-40C in formation fluid samples 9-10 C 11-15 C 16-20 C 21-25 C 26-30 C 31-35 C 36-40 The content of n-alkanes; q1 to q7 are all weighting coefficients, with values ​​ranging independently from 0 to 10, and q1 to q7 are not all 0 at the same time;

[0076] When N ≤ the first threshold, the data processing module automatically determines that the formation to which the formation fluid sample from the first well belongs has no crude oil resources; when N > the first threshold, the data processing module automatically determines that the formation to which the formation fluid sample from the first well belongs has crude oil resources; wherein the first threshold is greater than 0.

[0077] Finally, under the control of the control module 7, the display module 8 and the information output module 9 display and output the two-dimensional gas chromatography information of the formation fluid sample of the first well, the two-dimensional gas chromatography information of n-alkane, the light-to-weight ratio N of n-alkane, and the conclusion of whether the formation to which the formation fluid sample belongs contains crude oil resources. This realizes the visualization of the determination result of whether the formation to which the formation fluid sample of the first well belongs contains crude oil resources, as well as the key information and key parameters on which the determination result is based.

[0078] It should be noted that the expression for the light-to-weight ratio N of n-alkane listed above is only provided as an example. Depending on the formation fluid sample, the range of carbon numbers of n-alkanes covered by the detected two-dimensional gas chromatography information will inevitably vary. The carbon number range and weights in the expression for the light-to-weight ratio N of n-alkane listed above can be adjusted appropriately according to the actual situation.

[0079] As for the first threshold, a suitable value for the first threshold is determined by collecting two-dimensional gas chromatography information of n-alkanes, the light-to-heavy ratio of n-alkanes, and the presence or absence of crude oil resources in the formation of the first well from the drilled adjacent wells, and using statistical methods.

[0080] Part Two

[0081] The reservoir exploration and development method based on two-dimensional gas chromatography information provided in this embodiment of the invention further includes: obtaining two-dimensional gas chromatography information of cycloalkanes from formation fluid samples of the first well, and calculating the cycloalkanes light-to-heavy ratio G; the cycloalkanes light-to-heavy ratio G is calculated based on the two-dimensional gas chromatography information of light cycloalkanes and heavy cycloalkanes from the formation fluid samples; and determining the nature of the crude oil resources based on the cycloalkanes light-to-heavy ratio G.

[0082] Specifically, the method for obtaining two-dimensional gas chromatographic information of cycloalkanes from the formation fluid samples of the first well is as described in Part I above;

[0083] Under the control of control module 7, the data processing module automatically calculates the cycloalkane light-to-heavy ratio G. The cycloalkane light-to-heavy ratio G is automatically calculated based on the two-dimensional gas chromatography information of light cycloalkane and heavy cycloalkane from the formation fluid sample according to the following expression:

[0084] Among them, g 9-10 g 11-15 g 16-20 g 21-25 g 26-30 g 31-35 g 36-40 C in formation fluid samples 9-10 C 11-15 C 16-20 C 21-25 C 26-30 C 31-35 C 36-40 The content of cycloalkanes; q8 to q 14 All are weighting coefficients, with values ​​independently ranging from 0 to 10, and q8 to q 14 Not both are 0;

[0085] When G > the second threshold, the data processing module automatically determines that the crude oil resources contained in the formation of the formation fluid sample of the first well are light oil; wherein, the second threshold is greater than 0.

[0086] Furthermore, the reservoir exploration and development method based on two-dimensional gas chromatography information provided in this embodiment of the invention also includes: obtaining two-dimensional gas chromatography information of monocyclic aromatic hydrocarbons from formation fluid samples of the first well, and calculating the monocyclic aromatic hydrocarbon light-to-heavy ratio A; the monocyclic aromatic hydrocarbon light-to-heavy ratio A is calculated based on the two-dimensional gas chromatography information of light monocyclic aromatic hydrocarbons and heavy monocyclic aromatic hydrocarbons in the formation fluid samples; and combining the cycloalkane light-to-heavy ratio G and the monocyclic aromatic hydrocarbon light-to-heavy ratio A to determine the nature of the crude oil resources.

[0087] Specifically, the method for obtaining two-dimensional gas chromatographic information of monocyclic aromatic hydrocarbons from the formation fluid sample of the first well is as described in Part I above;

[0088] Under the control of control module 7, the data processing module automatically calculates the light-to-heavy ratio A of monocyclic aromatic hydrocarbons. The light-to-heavy ratio A is automatically calculated based on the two-dimensional gas chromatography information of light monocyclic aromatic hydrocarbons and heavy monocyclic aromatic hydrocarbons from the formation fluid sample according to the following expression:

[0089] Among them, a 7-9 a 10-12 a 13-14 a 15-17 C in formation fluid samples 7-9 C 10-12C 13-14 C 15-17 The content of monocyclic aromatic hydrocarbons; q 15 to q 18 All are weighting coefficients, with values ​​independently ranging from 0 to 10, and q 15 to q 18 Not both are 0;

[0090] When G ≤ the second threshold and A ≥ the third threshold, the data processing module automatically determines that the crude oil resources contained in the formation to which the formation fluid sample of the first well belongs are medium-quality oil; when G ≤ the second threshold and A < the third threshold, the data processing module automatically determines that the crude oil resources contained in the formation to which the formation fluid sample of the first well belongs are heavy oil; where the second threshold and the third threshold are both greater than 0;

[0091] Finally, under the control of the control module 7, the display module 8 and the information output module 9 display and output the two-dimensional gas chromatography information of the formation fluid sample of the first well, the two-dimensional gas chromatography information of cycloalkanes, the two-dimensional gas chromatography information of monocyclic aromatics, the light-to-weight ratio G of cycloalkanes, the light-to-weight ratio A of monocyclic aromatics, and the determination conclusion of the nature of the crude oil resources contained in the formation to which the formation fluid sample of the first well belongs. This realizes the visualization of the determination result of the nature of the crude oil resources contained in the formation to which the formation fluid sample of the first well belongs, as well as the key information and key parameters on which the determination result is based.

[0092] It should be noted that the expressions for the cycloalkane light-to-weight ratio G and the monocyclic aromatic light-to-weight ratio A listed above are provided as examples only. Depending on the formation fluid sample, the range of carbon numbers of cycloalkane and monocyclic aromatic hydrocarbons covered by the detected two-dimensional gas chromatography information of cycloalkane and monocyclic aromatic hydrocarbons will inevitably differ. The carbon number range and weights in the expressions for the cycloalkane light-to-weight ratio G and the monocyclic aromatic light-to-weight ratio A above can be appropriately adjusted according to the actual situation.

[0093] As for the second and third thresholds, appropriate values ​​for the second and third thresholds are determined by collecting two-dimensional gas chromatography information on cycloalkanes, two-dimensional gas chromatography information on monocyclic aromatics, light-to-weight ratios of cycloalkanes and monocyclic aromatics, as well as information on the properties of the crude oil resources contained in the first well, and using statistical methods.

[0094] Part Three

[0095] The reservoir exploration and development method based on two-dimensional gas chromatography information provided in this embodiment of the invention further includes: obtaining the two-dimensional gas chromatography information of cycloalkanes in the formation fluid sample of the second well adjacent to the first well, and determining the correlation between the two-dimensional gas chromatography information of cycloalkanes in the formation fluid sample of the first well to obtain the formation correlation results between the first well and the second well.

[0096] First, a suitable amount (e.g., 500 mL) of formation fluid sample from the second well adjacent to the first well is collected and placed into a sample bottle. Then, under the control of the control module 7: the sample pretreatment module 1 automatically and quantitatively extracts the formation fluid sample from the second well (e.g., 20 mL) from the sample bottle and injects it into the extraction bottle. Next, it automatically and quantitatively extracts the extract (e.g., 80 mL) from the extract container and injects it into the extraction bottle, mixing and extracting it with the formation fluid sample from the second well to obtain the extracted sample. The automatic injection module 2 automatically and quantitatively extracts the extracted sample (e.g., 5 μL) and injects it into the one-dimensional gas chromatography column 3 for primary component separation, separating at least three groups according to the classification of n-alkane components, cycloalkane components, and monocyclic aromatic components. The process involves at least three categories of components—n-alkane components, cycloalkane components, and monocyclic aromatic components—which are then transferred to modulation column 5. Modulation module 4 controls modulation column 5 to modulate each component category, resulting in modulated components. Each modulated component is then transferred to a two-dimensional gas chromatography column 6 for secondary component separation, yielding at least n-alkane components, cycloalkane components, and monocyclic aromatic components classified by carbon number. Finally, at least the cycloalkane components classified by carbon number are transferred to an information quantification processing module for information quantification processing, obtaining the cycloalkane two-dimensional gas chromatographic information (e.g., C9-C9) of the formation fluid sample from the second well. 40 (Content of various cycloalkanes).

[0097] Next, under the control of control module 7, the data processing module automatically calculates the determination coefficient r between the two-dimensional gas chromatography information of cycloalkanes in the formation fluid sample of the first well and the two-dimensional gas chromatography information of cycloalkanes in the formation fluid sample of the second well. 2 ; Determination coefficient r 2 The calculation method is existing technology and will not be elaborated here;

[0098] When the determination coefficient r 2 When the threshold value is greater than or equal to the fourth threshold, the data processing module automatically determines that the formation fluid sample from the first well belongs to the same formation as the formation fluid sample from the second well; when the determination coefficient r 2 When the value is less than the fourth threshold, the data processing module automatically determines that the formation fluid sample from the first well belongs to a different formation than the formation fluid sample from the second well. The fourth threshold is greater than 0, and its specific value is obtained by statistical methods.

[0099] Finally, under the control of the control module 7, the display module 8 and the information output module 9 display and output the two-dimensional gas chromatography information of the formation fluid samples from the first well and the second well, the two-dimensional gas chromatography information of cycloalkanes, and the determination coefficient r. 2 The determination of correlation and stratigraphic correlation results enable the visualization of stratigraphic correlation results and the key information and parameters on which they are based.

[0100] Optionally, based on obtaining the two-dimensional gas chromatographic information of the formation fluid samples from the second well adjacent to the first well, it is also possible to further obtain the two-dimensional gas chromatographic information of the formation fluid samples at different depths from the second well adjacent to the first well and save it according to the well depth to form a two-dimensional gas chromatographic information database of the drilled adjacent wells of the first well, which facilitates the formation correlation between the formation to which the formation fluid samples from the first well belong and the formation to which the formation fluid samples at different depths from the second well belong.

[0101] Part Four

[0102] The reservoir exploration and development method based on two-dimensional gas chromatography information provided in this embodiment of the invention further includes evaluating the water flooding degree of the first well: collecting water-bearing crude oil samples from the first well, obtaining crude oil samples and separated water samples through oil-water separation processing; obtaining two-dimensional gas chromatography information of the crude oil samples and the separated water samples, and calculating the water flooding index D; evaluating the water flooding degree of the first well based on the two-dimensional gas chromatography information of the crude oil samples, the two-dimensional gas chromatography information of the separated water samples, and the water flooding index D.

[0103] First, collect an appropriate amount (e.g., 500 mL) of water-containing crude oil sample from the wellhead of the first well and put it into a sample bottle. Then, extract an appropriate amount (e.g., 100 mL ± 5 mL) of the water-containing crude oil sample from the bottle and inject it into a stirrer. Stir the water-containing crude oil sample for 10 minutes and then pour it into a test tube. Let it stand for 24 hours to achieve oil-water separation. The upper layer of the test tube is the crude oil sample, and the lower layer of the test tube is the separated water sample.

[0104] Then, under the control of control module 7: sample pretreatment module 1 automatically and quantitatively extracts the separated crude oil sample (e.g., 20 mL) and injects it into the extraction bottle; it also automatically and quantitatively extracts the extract (e.g., 80 mL) from the extract container and injects it into the extraction bottle to mix and extract with the crude oil sample, obtaining the extracted sample; automatic injection module 2 automatically and quantitatively extracts the extracted sample (e.g., 5 μL) and injects it into a one-dimensional gas chromatography column 3 for primary component separation, separating at least n-alkane components, cycloalkanes, and monocyclic aromatics. The system distinguishes three categories of components; at least three categories of components, distinguished by n-alkane components, cycloalkane components, and monocyclic aromatic components, are transferred to modulation column 5. Modulation module 4 controls modulation column 5 to modulate each category of component, resulting in at least modulated n-alkane components, modulated cycloalkane components, and modulated monocyclic aromatic components. Each modulated component is then transferred to two-dimensional gas chromatography column 6 for secondary component separation, yielding at least various n-alkane components distinguished by carbon number (e.g., C9-C1). 40 Various n-alkanes), and various cycloalkanes classified by carbon number (e.g., C9-C1). 40Various cycloalkanes) and various monocyclic aromatic hydrocarbons classified by carbon number (e.g., C7-C12). 17 Various monocyclic aromatic hydrocarbons); at least the various n-alkane components, cycloalkane components, and monocyclic aromatic hydrocarbon components classified by carbon number are respectively transmitted to the information quantification processing module for information quantification processing to obtain the two-dimensional gas chromatographic information of the crude oil sample, including the two-dimensional gas chromatographic information of the n-alkane of the crude oil sample (e.g., C9-C1). 40 The content of various n-alkanes), and two-dimensional gas chromatography information of cycloalkanes (e.g., C9-C). 40 The content of various cycloalkanes) and two-dimensional gas chromatographic information of monocyclic aromatic hydrocarbons (e.g., C7-C6). 17 The content of various monocyclic aromatic hydrocarbons);

[0105] Under the control of control module 7, the crude oil sample is replaced with an equal amount of separated water sample, and the two-dimensional gas chromatographic information of the separated water sample is obtained by detecting it according to the same steps. This includes the two-dimensional gas chromatographic information of the n-alkane of the separated water sample (e.g., C9-C). 40 The content of various n-alkanes), and two-dimensional gas chromatography information of cycloalkanes (e.g., C9-C). 40 The content of various cycloalkanes) and two-dimensional gas chromatographic information of monocyclic aromatic hydrocarbons (e.g., C7-C6). 17 The content of various monocyclic aromatic hydrocarbons).

[0106] Next, under the control of control module 7, the data processing module automatically acquires the two-dimensional gas chromatographic information of the crude oil sample and separates the two-dimensional gas chromatographic information of the water sample, and automatically calculates the hydrocarbon value D of the crude oil sample. O Hydrocarbon value D of separated water sample W And the oil reservoir water flooding index D;

[0107] Among them, the hydrocarbon value D of the crude oil sample O Based on the two-dimensional gas chromatographic information of n-alkanes, cycloalkanes, and monocyclic aromatics from the crude oil sample, D was calculated using the following expression: NO =q 19 On 9-10 +q 20 On 11-15 +q 21 On 16-20 +q 22 On 21-25 +q 23 On 26-30 +q 24 On 31-35 +q 25 On 36-40 ; D GO =q 26Og 9-10 +q 27 Og 11-15 +q 28 Og 16-20 +q 29 Og 21-25 +q 30 Og 26-30 +q 31 Og 31-35 +q 32 Og 36-40 ; D AO =q 33 Oa 7-9 +q 34 Oa 10-12 +q 35 Oa 13-14 +q 36 Oa 15-17 ; D O =D NO +D GO +D AO ;

[0108] D NO The value of n-alkane in the crude oil sample is represented by the expression, where On 9-10 On 11-15 On 16-20 On 21-25 On 26-30 On 31-35 On 36-40 C in crude oil samples 9-10 C 11-15 C 16-20 C 21-25 C 26-30 C 31-35 C 36-40 The content of n-alkanes; q 19 to q 25 All are weighting coefficients, with values ​​independently ranging from 0 to 10, and q 19 to q 25 Not both are 0;

[0109] D GO The value of cycloalkanes in the crude oil sample is represented by the expression Og. 9-10 Og 11-15 Og 16-20 Og 21-25 Og 26-30 Og 31-35 Og 36-40 C in crude oil samples 9-10 C 11-15 C 16-20 C21-25 C 26-30 C 31-35 C 36-40 The content of cycloalkanes; q 26 to q 32 All are weighting coefficients, with values ​​independently ranging from 0 to 10, and q 26 to q 32 Not both are 0;

[0110] D AO The value of monocyclic aromatic hydrocarbons in the crude oil sample is represented by Oa. 7-9 Oa 10-12 Oa 13-14 Oa 15-17 C in crude oil samples 7-9 C 10-12 C 13-14 C 15-17 The content of monocyclic aromatic hydrocarbons; q 33 to q 36 All are weighting coefficients, with values ​​independently ranging from 0 to 10, and q 33 to q 36 Not both are 0;

[0111] Hydrocarbon value D of separated water sample W Based on the two-dimensional gas chromatographic information of n-alkanes, cycloalkanes, and monocyclic aromatics from the separated water sample, D was calculated according to the following expression: NW =q 37 Wn 9-10 +q 38 Wn 11-15 +q 39 Wn 16-20 +q 40 Wn 21-25 +q 41 Wn 26-30 +q 42 Wn 31-35 +q 43 Wn 36-40 ; D GW =q 44 Wg 9-10 +q 45 Wg 11-15 +q 46 Wg 16-20 +q 47 Wg 21-25 +q 48 Wg 26-30 +q 49 Wg 31-35 +q 50 Wg 36-40 ; DAW =q 51 Wa 7-9 +q 52 Wa 10-12 +q 53 Wa 13-14 +q 54 Wa 15-17 ; D W =D NW +D GW +D AW ;

[0112] D NW The value of n-alkane in the separated water sample is represented by Wn. 9-10 、Wn 11-15 、Wn 16-20 、Wn 21-25 、Wn 26-30 、Wn 31-35 、Wn 36-40 C in the separated water sample 9-10 C 11-15 C 16-20 C 21-25 C 26-30 C 31-35 C 36-40 The content of n-alkanes; q 37 to q 43 All are weighting coefficients, with values ​​independently ranging from 0 to 10, and q 37 to q 43 Not both are 0;

[0113] D GW The value of cycloalkanes in the separated water sample is represented by Wg in its expression. 9-10 Wg 11-15 Wg 16-20 Wg 21-25 Wg 26-30 Wg 31-35 Wg 36-40 C in the separated water sample 9-10 C 11-15 C 16-20 C 21-25 C 26-30 C 31-35 C 36-40 The content of cycloalkanes; q 44 to q 50 All are weighting coefficients, with values ​​independently ranging from 0 to 10, and q 44 to q 50 Not both are 0;

[0114] D AWThe value of monocyclic aromatic hydrocarbons in the separated water sample is represented by Wa in its expression. 7-9 Wa 10-12 Wa 13-14 Wa 15-17 C in the separated water sample 7-9 C 10-12 C 13-14 C 15-17 The content of monocyclic aromatic hydrocarbons; q 51 to q 54 All are weighting coefficients, with values ​​independently ranging from 0 to 10, and q 51 to q 54 Not both are 0;

[0115] The reservoir water flooding index D is based on the hydrocarbon value D of the crude oil sample. O And the hydrocarbon value D of the separated water sample W It is calculated according to the following expression:

[0116] In the expression for the reservoir water flooding index D, q 55 and q 56 All are weighting coefficients, q 55 and q 56 All are natural numbers greater than 0.

[0117] Next, under the control of control module 7, the data processing module processes the data based on the hydrocarbon value D of the crude oil sample. O Hydrocarbon value D of separated water sample W The degree of water flooding in the first well is automatically evaluated based on the intervals belonging to the three factors: the reservoir water flooding index D, and the hydrocarbon value D of the crude oil sample. O Hydrocarbon value D of separated water sample W The intervals for the oil reservoir water flooding index D and the oil reservoir water flooding index were determined by collecting two-dimensional gas chromatography information on n-alkanes, cycloalkanes, and monocyclic aromatics from crude oil samples and separated water samples from adjacent drilled wells of the first well, as well as hydrocarbon values ​​from crude oil samples, hydrocarbon values ​​from separated water samples, oil reservoir water flooding index, and information on the degree of oil reservoir water flooding, and then using statistical methods.

[0118] Finally, under the control of the control module 7, the display module 8 and the information output module 9 display and output the following information: two-dimensional gas chromatography information of crude oil samples, two-dimensional gas chromatography information of n-alkanes, two-dimensional gas chromatography information of cycloalkanes, and two-dimensional gas chromatography information of monocyclic aromatic hydrocarbons; two-dimensional gas chromatography information of water samples, two-dimensional gas chromatography information of n-alkanes, two-dimensional gas chromatography information of cycloalkanes, and two-dimensional gas chromatography information of monocyclic aromatic hydrocarbons; and the hydrocarbon value D of crude oil samples. O Hydrocarbon value D of separated water sample WThe reservoir water flooding index D and the resulting evaluation results of the reservoir water flooding degree of the first well are used to visualize the evaluation results of the reservoir water flooding degree of the first well and the key information and key parameters on which the evaluation results are based.

[0119] The present invention also provides several application examples of implementing the reservoir exploration and development method based on two-dimensional gas chromatography information according to the present invention using the reservoir exploration and development apparatus based on two-dimensional gas chromatography information provided in the embodiments of the present invention.

[0120] Application Example 1

[0121] Using the reservoir exploration and development device based on two-dimensional gas chromatography information provided in Example 1, and the reservoir exploration and development method based on two-dimensional gas chromatography information provided in Example 2, the presence and nature of crude oil resources in the three formation fluid samples taken from the 4200-meter well section of Well G5, the 4125-meter well section of Well Q40, and the 3648-meter well section of Well W4-2 are determined.

[0122] The following steps were followed to determine the two-dimensional gas chromatographic information of the formation fluid sample from the 4200-meter interval of well G5: First, 500 mL of formation fluid sample from the 4200-meter interval of well G5 was collected and placed in a sample vial for later use; then, under the control of control module 7, sample pretreatment module 1 automatically and quantitatively extracted 20 mL from the sample vial. Formation fluid samples from the 4200-meter interval of well G5 were injected into an extraction bottle. 80 mL of extract solution was automatically and quantitatively drawn from the extraction solution container and injected into the extraction bottle to mix with the formation fluid samples from the 4200-meter interval of well G5 for extraction, resulting in an extracted sample. The automatic injection module 2 extracted 5 μL of the extracted sample from the extraction bottle and automatically injected it into a one-dimensional gas chromatography column 3 for primary component separation, obtaining n-alkane components, alkanes, cycloalkanes, monocyclic aromatics, and dicyclic aromatics. These components were then transferred to a modulation column 5, where a modulation module 4 controlled the modulation column 5 to modulate each type of component, resulting in... Modulated n-alkane components, modified aliphatic alkane components, modified cycloalkane components, modified monocyclic aromatic hydrocarbon components, and modified dicyclic aromatic hydrocarbon components were extracted. Each type of modified component was transferred to a two-dimensional gas chromatography column 6 for secondary component separation, resulting in various n-alkane components, aliphatic alkane components, cycloalkane components, monocyclic aromatic hydrocarbon components, and dicyclic aromatic hydrocarbon components classified by carbon number. Each type of component classified by carbon number was then transferred to an information quantification processing module for information quantification processing, yielding the two-dimensional gas chromatographic information of the formation fluid sample in the 4200-meter interval of well G5, as detailed in Table 1.

[0123] Similarly, following the same procedure for determining the two-dimensional gas chromatographic information of the formation fluid sample in the 4200-meter interval of well G5, the two-dimensional gas chromatographic information of the formation fluid sample in the 4125-meter interval of well Q40 and the formation fluid sample in the 3648-meter interval of well W4-2 were obtained, as shown in Tables 2 and 3.

[0124] Table 1. Two-dimensional gas chromatographic information of formation fluid samples in the 4200-meter interval of Well G5

[0125] Table 2. Two-dimensional gas chromatographic information of formation fluid samples from the 4125-meter interval of Well Q40.

[0126] Table 3. Two-dimensional gas chromatographic information of formation fluid samples from the 3648-meter section of Well W4-2.

[0127] It should be noted that, taking the 0.279% content of C9 n-alkanes in Table 1 as an example, this means that the total mass of all hydrocarbon components in Table 1, including n-alkanes, aliphatic alkanes, cycloalkanes, monocyclic aromatics, and dicyclic aromatics, is counted as 100%, with the mass of C9 n-alkanes accounting for 0.279%. The understanding of the contents of other hydrocarbon components in Table 1 can be inferred in the same way. The understanding of Tables 2 and 3 is similar.

[0128] Next, under the control of the control module 7, the data processing module automatically calculates the n-alkane light-to-weight ratio N of the formation fluid samples in the 4200-meter interval of well G5, the 4125-meter interval of well Q40, and the 3648-meter interval of well W4-2, respectively, according to the expression for the n-alkane light-to-weight ratio N listed in Example 2. The calculation results are shown in Table 4.

[0129] Table 4. N-alkane light-to-weight ratio (N) of formation fluid samples from the 4200-meter interval of well G5, the 4125-meter interval of well Q40, and the 3648-meter interval of well W4-2.

[0130] As shown in Table 4, the n-alkane light-to-weight ratio of the formation fluid samples from the 4200-meter interval of well G5 and the 4125-meter interval of well Q40 is greater than the first threshold, while the n-alkane light-to-weight ratio of the formation fluid samples from the 3648-meter interval of well W4-2 is less than the first threshold. The data processing module automatically determined that the 4200-meter interval of well G5 and the 4125-meter interval of well Q40 contain crude oil resources, while the 3648-meter interval of well W4-2 does not contain crude oil resources.

[0131] The value of the first threshold is determined by the data processing module through statistical methods by collecting two-dimensional gas chromatography information of n-alkanes, light-to-heavy ratio of n-alkanes, and information on the presence or absence of crude oil resources in the formations of adjacent drilled wells such as G5, Q40, and W4-2.

[0132] Furthermore, under the control of the control module 7, the data processing module automatically calculates the cycloalkane light-to-weight ratio G and the monocyclic aromatic light-to-weight ratio A of the formation fluid samples in the 4200-meter interval of well G5 and the 4125-meter interval of well Q40, respectively, according to the expressions for the cycloalkane light-to-weight ratio G and the monocyclic aromatic light-to-weight ratio A listed in Example 2. The results are shown in Table 5.

[0133] Table 5. Naphthenic light-to-weight ratio (G) and monocyclic aromatic light-to-weight ratio (A) of formation fluid samples from the 4200-meter interval of well G5 and the 4125-meter interval of well Q40.

[0134] As shown in Table 5, the cycloalkane light-to-weight ratio G of the formation fluid samples in the 4200-meter interval of well G5 and the cycloalkane light-to-weight ratio A of the monocyclic aromatic hydrocarbons are less than the second threshold and greater than the third threshold. The data processing module automatically determined that the crude oil resources contained in the 4200-meter interval of well G5 and the 4125-meter interval of well Q40 are both medium-quality oil.

[0135] The values ​​of the second and third thresholds are obtained by the data processing module by collecting information on the two-dimensional gas chromatography of cycloalkanes, the two-dimensional gas chromatography of monocyclic aromatics, the light-to-heavy ratio of cycloalkanes, the light-to-heavy ratio of monocyclic aromatics, and the properties of the crude oil resources contained in the drilled adjacent wells of G5 and Q40, and using statistical methods.

[0136] Verification 1. Verification of the determination result regarding the existence of crude oil resources

[0137] The logging interpretation results for the 4200-meter interval of well G5 and the 4125-meter interval of well Q40 indicate that they are oil-bearing layers, while the logging interpretation result for the 3648-meter interval of well W4-2 indicates that they are water-bearing layers. In other words, the 4200-meter interval of well G5 and the 4125-meter interval of well Q40 contain crude oil resources, while the 3648-meter interval of well W4-2 does not contain crude oil resources.

[0138] Verification 2. Verification of automatic evaluation results of crude oil properties

[0139] Density measurements were performed on crude oil samples taken from the 4200-meter section of well G5 in the laboratory, and the result was 0.87 g / cm³. 3 According to "ρ 轻质油 <0.87g / cm 3 0.87g / cm 3 ≤ρ 中质油 <0.92g / cm3 0.92g / cm 3 ≤ρ 重质油 <1.0g / cm 3 According to the standard, the crude oil sampled from the 4200-meter section of well G5 was determined to be medium-quality oil; the density test results of the crude oil sampled from the 4125-meter section of well Q40 in the laboratory also showed that it was medium-quality oil.

[0140] It is evident that the results of Verification 1 and Verification 2 are consistent with the judgment results of Application Example 1, proving that the judgment results of Application Example 1 on the presence and nature of crude oil resources in the formations of the 4200-meter well section of Well G5, the 4125-meter well section of Well Q40, and the 3648-meter well section of Well W4-2 are correct.

[0141] Application Example 2

[0142] Using the reservoir exploration and development device based on two-dimensional gas chromatography information provided in Example 1, and the reservoir exploration and development method based on two-dimensional gas chromatography information provided in Example 2, it is determined whether the formation at a depth of 3891 meters in well W456 and the formation at a depth of 3920 meters in the adjacent well W479 are the same formation.

[0143] Two-dimensional gas chromatography information (e.g., C60) of cycloalkanes in formation fluid samples from the 3891-meter-deep formation of well W456 was obtained according to the method described in Part III of Example 2. 10 -C 35 The content of various cycloalkanes), and the two-dimensional gas chromatographic information of cycloalkanes in formation fluid samples from the adjacent well W479 at a depth of 3920 meters (e.g., C). 10 -C 35 The content of various cycloalkanes); under the control of control module 7, the data processing module automatically calculates the C content of the formation fluid sample at a depth of 3891 meters in well W456. 10 -C 35 The content of various cycloalkanes, and the C content of formation fluid samples from the 3920-meter-deep formation of the adjacent well W479. 10 -C 35 The determination coefficient r between the contents of various cycloalkanes 2 The results are shown in Figure 3.

[0144] Figure 3 shows the determination coefficient r. 2 The automatic calculation results show the determination coefficient r. 2 =0.8582, which is greater than the fourth threshold (obtained by statistical methods); the data processing module determined that the formation at a depth of 3891 meters in well W456 and the formation at a depth of 3920 meters in the adjacent well W479, which has been completed, are the same formation.

[0145] Verification 3. Verification of automatic stratigraphic correlation results

[0146] A comprehensive interpretation of well logging data was performed on the formation at a depth of 3891 meters in well W456 and the formation at a depth of 3920 meters in the adjacent well W479. The logging curves of the corresponding formations in the two wells showed consistent trends, indicating that they were the same formation. This verified that the automatic formation comparison results in Application Example 2 were correct.

[0147] Application Example 3

[0148] Using the reservoir exploration and development device based on two-dimensional gas chromatography information provided in Example 1, and the reservoir exploration and development method based on two-dimensional gas chromatography information provided in Example 2, the water flooding degree of the oil layer in well section 6 (4461.7 to 4466.0 meters) and well section 7 (4477.2 to 4484.4 meters) of well W456 was evaluated.

[0149] Following the method described in Part IV of Example 2, oil samples from the 4461.7 to 4466.0 meter oil layer of well W456 (section 6) and the 4477.2 to 4484.4 meter oil layer of well W456 (section 7) underwent separate oil-water separation. Two-dimensional gas chromatography (GC) information (including GC information for n-alkanes, cycloalkanes, and monocyclic aromatics) of the crude oil samples from the 4461.7 to 4466.0 meter oil layer of well W456 (section 6) was obtained. Specifically, this information pertains to the C9-C... 40 The content of various n-alkanes, C9-C 40 The content of various cycloalkanes and C7-C 17 The content of various monocyclic aromatic hydrocarbons) and two-dimensional gas chromatography information of the separated water samples (including two-dimensional gas chromatography information of n-alkanes, cycloalkanes and monocyclic aromatic hydrocarbons, specifically the C9-C content of the separated water samples from the 4461.7 to 4466.0 meter oil layer of well No. 6 in well W456). 40 The content of various n-alkanes, C9-C 40 The content of various cycloalkanes and C7-C 17 The content of various monocyclic aromatic hydrocarbons) and two-dimensional gas chromatography information of crude oil samples from the 4477.2 to 4484.4 meter oil layer of well No. 7 in well W456 (including two-dimensional gas chromatography information of n-alkanes, cycloalkanes and monocyclic aromatic hydrocarbons, specifically the C9-C content of various monocyclic aromatic hydrocarbons in crude oil samples from the 4477.2 to 4484.4 meter oil layer of well No. 7 in well W456). 40 The content of various n-alkanes, C9-C 40 The content of various cycloalkanes and C7-C 17The content of various monocyclic aromatic hydrocarbons) and two-dimensional gas chromatography information of the separated water samples (including two-dimensional gas chromatography information of n-alkanes, cycloalkanes and monocyclic aromatic hydrocarbons, specifically the C9-C content of the separated water samples from the 4477.2 to 4484.4 meter oil layer of well No. 7 in well W456). 40 The content of various n-alkanes, C9-C 40 The content of various cycloalkanes and C7-C 17 The content of various monocyclic aromatic hydrocarbons);

[0150] Then, under the control of control module 7, the data processing module processes the crude oil sample hydrocarbon values ​​D as listed in Example 2. O Hydrocarbon value D of separated water sample w The expression for the reservoir water flooding index D is used to automatically calculate the hydrocarbon values ​​D of crude oil samples from the 4461.7 to 4466.0 meter oil layer in section 6 of well W456 and the 4477.2 to 4484.4 meter oil layer in section 7 of well W456. O Hydrocarbon value D of separated water sample w The results of the reservoir water flooding index D are shown in Table 6.

[0151] Table 6. Oil layer depths of 4461.7 to 4466.0 meters in section 6 of well W456 and 4477.2 to 4484.4 meters in section 7 of well W456. O D W and D

[0152] Under the control of the control module 7, the data processing module automatically determines the hydrocarbon values ​​D of the crude oil samples from the two oil layers based on the test results shown in Table 6. O Hydrocarbon value D of separated water sample w The intervals to which the oil reservoir water flooding index D belongs (D O D W The interval divisions of the three elements (D, W456, and W456) were determined by collecting two-dimensional gas chromatography information on n-alkanes, cycloalkanes, and monocyclic aromatics from crude oil samples and separated water samples from adjacent drilled wells of W456, as well as hydrocarbon values ​​from crude oil samples, hydrocarbon values ​​from separated water samples, reservoir water flooding index, and reservoir water flooding degree information, and using statistical methods. The results automatically determined that the reservoir in section 6 of W456 (4461.7 to 4466.0 meters) was slightly water flooded, and the reservoir in section 7 of W456 (4477.2 to 4484.4 meters) was moderately water flooded.

[0153] Verification 4. Verification of the evaluation results of the water flooding degree of the oil reservoir

[0154] The oil testing results of the oil layer in section 6 of well W456 (4461.7 to 4466.0 meters) and section 7 of well W456 (4477.2 to 4484.4 meters) are consistent with the above evaluation results, proving that the above evaluation results are correct.

[0155] Although the present invention describes the steps of the reservoir exploration and development method based on two-dimensional gas chromatography information in a certain order, this does not imply a limitation on the order in which the steps are implemented. Those skilled in the art can flexibly adjust the order of the steps without affecting the implementation of the method.

[0156] It should be understood that the embodiments disclosed herein are not limited to the specific structures, processing steps, or materials disclosed herein, but should be extended to equivalent substitutions of these features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0157] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0158] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0159] Certain terms are used throughout this application to refer to specific system components. As those skilled in the art will recognize, the same components may often be referred to by different names, and therefore this application is not intended to distinguish components that differ only in name and not in function. The terms "an embodiment" or "embodiment" used in the specification mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Therefore, the phrase "an embodiment" or "embodiment" appearing throughout the specification does not necessarily refer to the same embodiment.

[0160] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

[0161] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and / or modifications falling within the scope of the invention, and all changes and / or modifications made according to embodiments of the invention should be covered within the protection scope of the invention.

Claims

1. A method for reservoir exploration and development based on two-dimensional gas chromatography information, characterized in that, include: Two-dimensional gas chromatographic information of n-alkanes from formation fluid samples of the first well was obtained; Based on the two-dimensional gas chromatography information of the n-alkane, it is determined whether the formation to which the formation fluid sample belongs has crude oil resources.

2. The method according to claim 1, characterized in that, Calculate the light-to-weight ratio N of n-alkane, and determine whether the formation to which the formation fluid sample belongs contains crude oil resources based on the n-alkane light-to-weight ratio N. The light-to-heavy ratio N of the n-alkane is calculated based on the two-dimensional gas chromatographic information of the light n-alkane and the heavy n-alkane of the formation fluid sample.

3. The method according to claim 2, characterized in that, Two-dimensional gas chromatography information of cycloalkanes from formation fluid samples of the first well was obtained, and the light-to-heavy ratio of cycloalkanes G was calculated. The light-to-heavy ratio of cycloalkanes G was calculated based on the two-dimensional gas chromatography information of light cycloalkanes and heavy cycloalkanes from the formation fluid samples. The nature of the crude oil resource is determined based on the cycloalkane light-to-heavy ratio G.

4. The method according to claim 3, characterized in that, Two-dimensional gas chromatography information of monocyclic aromatic hydrocarbons (MOA) from formation fluid samples of the first well was obtained, and the MOA light-to-heavy ratio A was calculated. The MOA light-to-heavy ratio A was calculated based on the two-dimensional gas chromatography information of light MOA and heavy MOA from the formation fluid samples. The nature of the crude oil resource is determined based on the cycloalkane light-to-weight ratio G and the monocyclic aromatic light-to-weight ratio A.

5. The method according to any one of claims 1 to 4, characterized in that, Two-dimensional gas chromatography information of cycloalkanes from formation fluid samples from a second well adjacent to the first well is obtained, and correlation is determined with that of two-dimensional gas chromatography information of cycloalkanes from formation fluid samples from the first well to obtain formation correlation results between the first and second wells.

6. The method according to claim 5, characterized in that, The correlation coefficient is calculated between the two-dimensional gas chromatographic information of cycloalkanes in the formation fluid sample of the first well and the two-dimensional gas chromatographic information of cycloalkanes in the formation fluid sample of the second well, and the correlation determination is performed.

7. The method according to any one of claims 1 to 6, characterized in that, The method also includes evaluating the degree of water flooding in the oil reservoir of the first well: A water-bearing crude oil sample was collected from the first well, and crude oil and water samples were obtained through oil-water separation. Two-dimensional gas chromatographic information of crude oil sample and two-dimensional gas chromatographic information of water sample were obtained, and the water flooding index D of oil layer was calculated. The degree of water flooding in the first well is evaluated based on the two-dimensional gas chromatography information of the crude oil sample, the two-dimensional gas chromatography information of the separated water sample, and the oil reservoir water flooding index D.

8. The method according to claim 7, characterized in that, The two-dimensional gas chromatographic information of the crude oil sample includes two-dimensional gas chromatographic information of n-alkanes, cycloalkanes, and monocyclic aromatics; and / or The two-dimensional gas chromatographic information of the separated water sample includes two-dimensional gas chromatographic information of n-alkanes, cycloalkanes, and monocyclic aromatic hydrocarbons of the separated water sample.

9. The method according to claim 8, characterized in that, Calculate the hydrocarbon value D of the crude oil sample O ; The hydrocarbon value D of the crude oil sample O The calculations were based on the two-dimensional gas chromatographic information of n-alkanes, cycloalkanes, and monocyclic aromatics from the crude oil sample.

10. The method according to claim 9, characterized in that, Calculate the hydrocarbon value D of the separated water sample W ; The hydrocarbon value D of the separated water sample W The results were calculated based on the two-dimensional gas chromatographic information of n-alkanes, cycloalkanes, and monocyclic aromatics of the separated water sample.

11. The method according to claim 10, characterized in that, The reservoir flooding index D is based on the hydrocarbon value D of the crude oil sample. O and the hydrocarbon value D of the separated water sample W Calculated.

12. The method according to claim 11, characterized in that, Combined with the hydrocarbon value D of the crude oil sample O The hydrocarbon value D of the separated water sample W The reservoir water flooding index D is used to evaluate the degree of reservoir water flooding in the first well.

13. An oil reservoir exploration and development device based on two-dimensional gas chromatography information, characterized in that, The apparatus is used to implement the method as described in any one of claims 1 to 12, comprising: The two-dimensional gas chromatography information detection module is used to detect the two-dimensional gas chromatography information of n-alkanes, cycloalkanes, and monocyclic aromatics in the formation fluid sample of the first well. The data processing module is used to acquire the two-dimensional gas chromatography information of n-alkane, cycloalkanes, and monocyclic aromatic hydrocarbons, perform data processing, and determine the presence and nature of the formation crude oil resources to which the formation fluid sample of the first well belongs.

14. The method for reservoir exploration and development based on two-dimensional gas chromatography information according to any one of claims 1 to 12, or the reservoir exploration and development device based on two-dimensional gas chromatography information according to claim 13, in petroleum geological logging.

15. A hardware storage device having computer-executable instructions stored thereon, characterized in that, When the computer execution instructions are executed by the processor, they implement the steps of the reservoir exploration and development method based on two-dimensional gas chromatography information as described in any one of claims 1 to 12.

Images