Formation correlation method and device based on two-dimensional gas chromatogram information

Abstract

The application provides a formation correlation method and device based on two-dimensional gas chromatography information. The application can realize formation correlation between a first well and a second well adjacent to the first well by automatically determining the correlation between the two-dimensional gas chromatography information of the formation fluid sample of the first well and the formation fluid sample of the second well, in which the two-dimensional gas chromatography information of the second well adjacent to the first well is used to replace the adjacent well drilling time data in the conventional method of the prior art, the problem of reduced representativeness of the adjacent well drilling time data caused by the influence of drilling process parameters and the problem of difficult control of the formation correlation effect are solved, the technical parameters relied on by the formation correlation are reduced, and the process of the formation correlation is simplified.

Description

Technical Field

[0001] This invention belongs to the field of petroleum geological logging technology, and particularly relates to a method and apparatus for stratigraphic correlation based on two-dimensional gas chromatography information. Background Technology

[0002] In the process of oil and gas exploration and development, in order to improve the efficiency of oil and gas exploration and development and accurately pinpoint the target formation, the traditional method mainly relies on comparing the drilling time data with that of adjacent wells to achieve the comparison of the formation of the current well with that of the adjacent well. This method is easily affected by drilling process parameters, which can lead to a decrease in the representativeness of the drilling time data and difficulty in controlling the formation comparison effect, thus affecting the formation comparison effect. Summary of the Invention

[0003] The purpose of this invention is to provide a formation correlation method based on two-dimensional gas chromatography information. Formation correlation is achieved by determining the correlation between the two-dimensional gas chromatography information of the formation fluid sample of the first well and the two-dimensional gas chromatography information of the formation fluid sample of the second well adjacent to the first well. This overcomes the shortcomings of the traditional method of relying on comparison with drilling time data of adjacent wells to achieve formation correlation between the drilling formation and adjacent wells, which has poor formation correlation effect.

[0004] One aspect of the present invention provides a stratigraphic correlation method based on two-dimensional gas chromatography information, comprising:

[0005] Two-dimensional gas chromatographic information of formation fluid samples from the first well and two-dimensional gas chromatographic information of formation fluid samples from the second well adjacent to the first well were obtained.

[0006] The correlation between the two-dimensional gas chromatographic information of the formation fluid samples from the first well and the second well is determined to obtain the formation correlation results between the first well and the second well.

[0007] According to a specific embodiment of the present invention, the two-dimensional gas chromatographic information of the formation fluid sample of the first well includes two-dimensional gas chromatographic information of cycloalkanes.

[0008] According to one specific embodiment of the present invention, the two-dimensional gas chromatographic information of the formation fluid sample from the second well includes two-dimensional gas chromatographic information of cycloalkanes.

[0009] According to a specific embodiment of the present invention, the correlation 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 is determined to obtain the formation correlation results between the first well and the second well.

[0010] According to a specific embodiment of the present invention, a determination 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 is determined.

[0011] According to a specific embodiment of the present invention, an extract and a formation fluid sample are extracted and subjected to extraction treatment to obtain an extracted sample;

[0012] The extracted sample was subjected to primary component separation to obtain at least cycloalkane components;

[0013] At least the cycloalkane component is modulated to obtain at least the modulated cycloalkane component;

[0014] At least the modulated cycloalkane components are subjected to secondary component separation to obtain at least various cycloalkane components distinguished by carbon number;

[0015] At least the various cycloalkane components distinguished by carbon number are subjected to information quantification processing to obtain two-dimensional gas chromatographic information of formation fluid samples, including two-dimensional gas chromatographic information of cycloalkane;

[0016] The formation fluid sample is a formation fluid sample from the first well or the second well.

[0017] The second invention provides a stratigraphic correlation device based on two-dimensional gas chromatography information, the device being used to implement the method provided in the first invention, comprising:

[0018] A two-dimensional gas chromatography information detection module is used to detect the two-dimensional gas chromatography information of formation fluid samples from the first well and the second well;

[0019] The data processing module is used to acquire two-dimensional gas chromatographic information of formation fluid samples from the first well and the second well, perform data processing, and obtain formation correlation results between the first well and the second well.

[0020] According to a specific embodiment of the present invention, the two-dimensional gas chromatography information detection module includes:

[0021] Sample pretreatment module 1 is used to automatically and quantitatively extract extract and formation fluid samples for extraction processing to obtain extracted samples.

[0022] The automatic sample injection module 2 and the one-dimensional gas chromatography column 3 are used to automatically and quantitatively extract the extracted sample and inject it into the one-dimensional gas chromatography column 3 to perform primary component separation on the extracted sample, at least to obtain cycloalkane components.

[0023] The modulation module 4 and the modulation column 5 are used to control the modulation column 5 to modulate at least the cycloalkane component, so as to obtain at least the modulated cycloalkane component;

[0024] A two-dimensional gas chromatographic column 6 is used to perform secondary component separation on at least the modulated cycloalkane components, to obtain at least various cycloalkane components distinguished by carbon number;

[0025] The information quantification processing module is used to perform information quantification processing on at least the various cycloalkane components distinguished by carbon number to obtain two-dimensional gas chromatographic information of the formation fluid sample, including two-dimensional gas chromatographic information of cycloalkane;

[0026] The formation fluid sample is a formation fluid sample from the first well or the second well.

[0027] The third invention provides the application of the formation correlation method based on two-dimensional gas chromatography information provided in the first invention or the formation correlation device based on two-dimensional gas chromatography information provided in the second invention in petroleum geological logging.

[0028] The fourth invention provides a hardware storage device having computer execution instructions stored thereon, which, when executed by a processor, implement the steps of the stratigraphic correlation method based on two-dimensional gas chromatography information provided in the first invention.

[0029] The beneficial effects of this invention are:

[0030] Compared with the prior art, the present invention may have the following advantages:

[0031] 1) The two-dimensional gas chromatography information of the formation fluid sample from the second well adjacent to the first well replaces the drilling time data of the adjacent well in the traditional method of the existing technology, which solves the problem of reduced representativeness of the drilling time data of the adjacent well and difficulty in controlling the formation correlation effect caused by the influence of drilling process parameters.

[0032] 2) It has achieved automation of sample pretreatment, sample injection, two-dimensional gas chromatography information detection, correlation determination and formation comparison of formation fluid samples. It can automatically perform two-dimensional gas chromatography information detection, correlation determination and formation comparison of formation fluids in drilling in a timely manner.

[0033] 3) A creative approach was proposed to complete the formation correlation between the first and second wells by determining the correlation 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 adjacent second well. This reduced the number of technical parameters required for formation correlation and simplified the formation correlation process. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the steps of the stratigraphic correlation method based on two-dimensional gas chromatography information provided in an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of a stratigraphic correlation device based on two-dimensional gas chromatography information provided in an embodiment of the present invention;

[0036] Figure 3 The determination coefficient r in the application example of this invention 2 The automatically calculated result.

[0037] The above figures are not drawn to actual size and scale. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] For ease of description, some nouns or terms appearing in the embodiments of the present invention will be described in detail below.

[0041] Cycloalkanes: Saturated hydrocarbons whose molecular structure contains alicyclic structures.

[0042] Two-dimensional gas chromatography: Full two-dimensional gas chromatography.

[0043] Correlation: A statistical concept.

[0044] The cycloalkanes two-dimensional gas chromatographic information referred to in this invention refers to the content of various cycloalkanes in formation fluid samples, distinguished by their carbon number. All contents mentioned in this invention are mass percentages, specifically meaning: 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.

[0045] The following uses the total carbon number range of cycloalkanes as C 10 -C 35 The technical solution of the present invention will be described in detail using examples.

[0046] It should be noted that the carbon number range mentioned in this invention does not constitute a limitation thereof. In practical applications, those skilled in the art can make appropriate adjustments to the above carbon number range based on the composition of the formation fluid sample and the detection results of two-dimensional gas chromatography.

[0047] It should also be noted that the selection of the extractant is existing technology. This invention does not specifically limit the type of extractant. Generally, commercially available organic solvents that can extract at least cycloalkanes from formation fluids can be used as extractants in this invention.

[0048] Example 1

[0049] This invention provides a stratigraphic correlation device based on two-dimensional gas chromatography information, which is used to implement the stratigraphic correlation method based on two-dimensional gas chromatography information provided by this invention.

[0050] Figure 2 This is a schematic diagram of the stratigraphic correlation device based on two-dimensional gas chromatography information provided in an embodiment of the present invention. The following is a description of the device in conjunction with... Figure 2 The stratigraphic correlation device based on two-dimensional gas chromatography information provided in the embodiments of the present invention will be described in detail.

[0051] A formation correlation device based on two-dimensional gas chromatography information is used to implement a formation correlation method based on two-dimensional gas chromatography information, comprising: a two-dimensional gas chromatography information detection module for detecting the two-dimensional gas chromatography information of formation fluid samples from a first well and a second well; and a data processing module (…). Figure 2 (Not shown in the image) is used to obtain two-dimensional gas chromatographic information of formation fluid samples from the first and second wells, perform data processing, and obtain formation correlation results between the first and second wells.

[0052] 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. Figure 2 (not shown in the image);

[0053] The system comprises the following components: Sample pretreatment module 1 for automatically and quantitatively extracting extract and formation fluid samples for extraction to obtain extracted samples; Automatic injection module 2 and one-dimensional gas chromatography column 3 for automatically and quantitatively injecting extracted samples into one-dimensional gas chromatography column 3 for primary component separation, obtaining at least cycloalkane components; Modulation module 4 and modulation column 5, wherein modulation module 4 controls modulation column 5 to modulate at least cycloalkane components, obtaining at least modulated cycloalkane components; Two-dimensional gas chromatography column 6 for performing secondary component separation on at least the modulated cycloalkane components, obtaining at least various cycloalkane components classified by carbon number; and Information quantification processing module for performing information quantification processing on at least various cycloalkane components classified by carbon number to obtain two-dimensional gas chromatography information of the formation fluid sample, including two-dimensional gas chromatography information of cycloalkane; the formation fluid sample is a formation fluid sample from well 1 or well 2.

[0054] In this embodiment of the invention, the stratigraphic correlation 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 stratigraphic correlation device based on two-dimensional gas chromatography information also includes a display module 8, an information output module 9 and a chassis 10.

[0055] Among them, the control module 7 is used to control the two-dimensional gas chromatography information detection module, the data processing module, the display module 8 and the information output module 9; the display module 8 and the information output module 9 are used to display and output the measured two-dimensional gas chromatography information, as well as the obtained correlation judgment results and formation correlation results, respectively; the chassis 10 is used to house the two-dimensional gas chromatography information detection module, the data processing module, the control module 7, the display module 8 and the information output module 9.

[0056] Example 2

[0057] This invention provides a stratigraphic correlation method based on two-dimensional gas chromatography information.

[0058] Figure 1 This is a schematic diagram of the steps of the stratigraphic correlation method based on two-dimensional gas chromatography information provided in the embodiments of the present invention. The following is a detailed explanation in conjunction with... Figure 1 The steps of the stratigraphic correlation method based on two-dimensional gas chromatography information disclosed in the embodiments of the present invention will be described in detail, and further combined with Figure 2 The process of implementing the stratigraphic correlation method based on two-dimensional gas chromatography information provided in this embodiment of the invention using the stratigraphic correlation device based on two-dimensional gas chromatography information provided in Example 1 is described.

[0059] A formation correlation method based on two-dimensional gas chromatography information includes: acquiring two-dimensional gas chromatography information of formation fluid samples from a first well and two-dimensional gas chromatography information of formation fluid samples from a second well adjacent to the first well; determining the correlation between the two-dimensional gas chromatography information of formation fluid samples from the first well and the second well to obtain formation correlation results between the first well and the second well.

[0060] Specifically, two-dimensional gas chromatography (GC) information was detected in formation fluid samples from the first and second wells. This section uses the GC information detection of the formation fluid sample from the first well as an example for detailed explanation. An appropriate amount (e.g., 500 mL) of formation fluid sample from the first well was collected and placed in a sample vial. Then, under the control of the control module 7: the sample pretreatment module 1 automatically and quantitatively extracted (e.g., 20 mL) of the formation fluid sample from the first well from the sample vial and injected it into the extraction vial. Next, the extraction liquid (e.g., 80 mL) was automatically and quantitatively extracted from the extraction liquid container and injected into the extraction vial, mixing and extracting with the formation fluid sample from the first well to obtain the extracted sample; the automatic sample injection module 2 automatically and quantitatively extracted (e.g., 5 μL) of the extracted sample. The sample is injected into a one-dimensional gas chromatography column 3 for primary component separation, at least to obtain cycloalkane components; the obtained cycloalkane components are then transferred to a modulation column 5, where a modulation module 4 controls the modulation column 5 to modulate the cycloalkane components, at least to obtain modulated cycloalkane components; the modulated cycloalkane components are then transferred to a two-dimensional gas chromatography column 6 for secondary component separation, at least to obtain various cycloalkane components classified by carbon number; the cycloalkane components classified by carbon number are then transferred to an information quantification processing module for information quantification processing to obtain the two-dimensional gas chromatography information of the formation fluid sample from the first well, including the two-dimensional gas chromatography information of cycloalkane components of the formation fluid sample from the first well (i.e., C2C2). 10 -C 35 (Content of various cycloalkanes);

[0061] Under the control of control module 7, the formation fluid sample from the first well is replaced with an equal amount of formation fluid sample from the second well. Following the same steps, the two-dimensional gas chromatography information of the formation fluid sample from the second well is obtained, including the two-dimensional gas chromatography information of cycloalkanes (i.e., C2O2) in the formation fluid sample from the second well. 10 -C 35 The content of various cycloalkanes).

[0062] 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 The coefficient of determination r 2 The calculation method is existing technology and will not be elaborated here;

[0063] When the determination coefficient r 2 When the formation fluid sample from the first well is ≥ the first 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 first 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 first threshold is greater than 0, and its specific value is obtained by statistical methods.

[0064] 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.

[0065] 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.

[0066] The present invention also provides an application example of implementing the stratigraphic correlation method based on two-dimensional gas chromatography information according to the present invention using a stratigraphic correlation device based on two-dimensional gas chromatography information provided in the embodiments of the present invention.

[0067] Application Example 1

[0068] Using the formation comparison device based on two-dimensional gas chromatography information provided in Example 1, and the formation comparison 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, which has been completed, are the same formation.

[0069] Referring to the method in Example 2, two-dimensional gas chromatography (GC) information of formation fluid samples from the 3891-meter formation of well W456 and the 3920-meter formation of the adjacent well W479 (completed well) was determined. The detection steps for the GC information of the formation fluid sample from the 3891-meter formation of well W456 are described in detail here. 500 mL of formation fluid sample from the 3891-meter formation of well W456 is collected and placed in a sample bottle. Then, under the control of control module 7: sample pretreatment module 1 automatically and quantitatively extracts 20 mL of the formation fluid sample from the 3891-meter formation of well W456 from the sample bottle and injects it into the extraction bottle. Next, 80 mL of extractant is automatically and quantitatively extracted from the extractant container and injected into the extraction bottle. This extractant is then mixed with the formation fluid sample from the 3891-meter formation of well W456 and extracted to obtain the extracted sample. The automatic sample injection module 2 automatically and quantitatively extracts 5 μL of the extracted sample and injects it into a one-dimensional gas chromatography column 3 for primary component separation, at least obtaining cycloalkane components; at least the obtained cycloalkane components are transferred to a modulation column 5, where the modulation module 4 controls the modulation column 5 to modulate at least the cycloalkane components, at least obtaining modulated cycloalkane components; at least the modulated cycloalkane components are transferred to a two-dimensional gas chromatography column 6 for secondary component separation, at least obtaining various cycloalkane components classified by carbon number; at least the cycloalkane components classified by carbon number are transferred to an information quantification processing module for information quantification processing to obtain the two-dimensional gas chromatography information of the formation fluid sample at a depth of 3891 meters in well W456, including the two-dimensional gas chromatography information of cycloalkane components (i.e., C2C2) of the formation fluid sample at a depth of 3891 meters in well W456. 10 -C 35 (Content of various cycloalkanes);

[0070] Under the control of control module 7, the formation fluid sample from the 3891-meter depth of well W456 was replaced with an equal amount of formation fluid sample from the 3920-meter depth of the adjacent, completed well W479. Following the same steps, the two-dimensional gas chromatography information of the formation fluid sample from the 3920-meter depth of well W479 was obtained, including the cycloalkanes two-dimensional gas chromatography information (i.e., C2O4) of the formation fluid sample from the 3920-meter depth of well W479. 10 -C 35 The content of various cycloalkanes).

[0071] Under the control of control module 7, the data processing module automatically calculates the C0 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 (which has been fully drilled). 10 -C 35The determination coefficient r between the contents of various cycloalkanes 2 The result is as follows Figure 3 As shown.

[0072] Figure 3 The determination coefficient r 2 The automatic calculation results show the determination coefficient r. 2 =0.8582, which is greater than the first threshold (the first threshold is greater than 0, and its specific value is obtained by statistical methods); the data processing module automatically 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.

[0073] stratigraphic correlation results verification

[0074] A comprehensive interpretation of well logging data was performed on the formation at a depth of 3891 meters in well W456 and 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, thus verifying the correctness of the above formation comparison results.

[0075] Although the present invention describes the steps of the stratigraphic correlation 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 performed. Those skilled in the art can flexibly adjust the order of the steps without affecting the implementation of the method.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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 stratigraphic correlation method based on two-dimensional gas chromatography information, comprising: Two-dimensional gas chromatographic information of formation fluid samples from the first well and two-dimensional gas chromatographic information of formation fluid samples from the second well adjacent to the first well were obtained. The correlation between the two-dimensional gas chromatographic information of the formation fluid samples from the first well and the second well is determined to obtain the formation correlation results between the first well and the second well.

2. The method according to claim 1, characterized in that, The two-dimensional gas chromatographic information of the formation fluid sample from the first well includes two-dimensional gas chromatographic information of cycloalkanes.

3. The method according to claim 2, characterized in that, The two-dimensional gas chromatographic information of the formation fluid sample from the second well includes two-dimensional gas chromatographic information of cycloalkanes.

4. The method according to claim 3, characterized in that, The correlation 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 is determined to obtain the formation correlation results between the first well and the second well.

5. The method according to claim 4, 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 is determined.

6. The method according to claim 3, characterized in that, Extraction of extract and formation fluid samples were performed to obtain the extracted sample. The extracted sample was subjected to primary component separation to obtain at least cycloalkane components; At least the cycloalkane component is modulated to obtain at least the modulated cycloalkane component; At least the modulated cycloalkane components are subjected to secondary component separation to obtain at least various cycloalkane components distinguished by carbon number; Information quantification processing is performed on at least the various cycloalkane components distinguished by carbon number to obtain two-dimensional gas chromatographic information of the formation fluid sample, including two-dimensional gas chromatographic information of cycloalkane; The formation fluid sample is a formation fluid sample from the first well or the second well.

7. A stratigraphic correlation 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 1-6, comprising: A two-dimensional gas chromatography information detection module is used to detect the two-dimensional gas chromatography information of formation fluid samples from the first well and the second well; The data processing module is used to acquire two-dimensional gas chromatographic information of formation fluid samples from the first well and the second well, perform data processing, and obtain formation correlation results between the first well and the second well.

8. The apparatus according to claim 7, characterized in that, The two-dimensional gas chromatography information detection module includes: The sample pretreatment module (1) is used to automatically and quantitatively extract extract and formation fluid samples for extraction to obtain the extracted sample; An automatic sample injection module (2) and a one-dimensional gas chromatography column (3) are used to automatically and quantitatively extract the extracted sample and inject it into the one-dimensional gas chromatography column (3) to perform primary component separation on the extracted sample and obtain at least cycloalkanes. The modulation module (4) and the modulation column (5) are used to control the modulation column (5) to modulate at least the cycloalkane component, so as to obtain at least the modulated cycloalkane component; A two-dimensional gas chromatographic column (6) is used to perform secondary component separation on at least the modulated cycloalkane components to obtain at least various cycloalkane components distinguished by carbon number; The information quantification processing module is used to perform information quantification processing on at least the various cycloalkane components distinguished by carbon number to obtain two-dimensional gas chromatographic information of the formation fluid sample, including two-dimensional gas chromatographic information of cycloalkane; The formation fluid sample is a formation fluid sample from the first well or the second well.

9. The application of the formation correlation method based on two-dimensional gas chromatography information according to any one of claims 1 to 6, or the formation correlation device based on two-dimensional gas chromatography information according to claim 7 or 8, in petroleum geological logging.

10. 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 stratigraphic correlation method based on two-dimensional gas chromatography information as described in any one of claims 1 to 6.

Images