A method, device, equipment and medium for returning a petroleum drilling fluid aftereffect
By analyzing the data of n-alkanes and isoalkanes in drilling fluid samples and comparing them with cuttings parameters, the problem of large aftereffect relocation error in oil drilling fluids was solved, achieving higher accuracy in relocation and interpretation of oil and gas reservoirs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA PETROCHEMICAL CORP
- Filing Date
- 2022-09-09
- Publication Date
- 2026-05-15
AI Technical Summary
Existing methods for repositioning oil drilling fluids after-effects are affected by a variety of factors, resulting in large errors and making accurate repositioning difficult.
By acquiring drilling fluid samples with bubbly oil features during the drilling process, and using logging technology to analyze and test n-alkanes and isoalkanes, the chromatographic parameters of total hydrocarbons and components are determined. These parameters are then compared with those of cuttings to determine the depth of the drilling fluid sample.
It reduces the influencing factors in the drilling fluid return process, improves the accuracy and practical value of return, and provides a more reliable interpretation of oil and gas reservoirs.
Smart Images
Figure CN117722145B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of petroleum exploration technology, and in particular to a method, apparatus, equipment and medium for classifying the aftereffects of petroleum drilling fluid. Background Technology
[0002] In oil exploration and development, the repositioning of drilling fluid aftereffects is crucial, achieved through gas logging and other auxiliary methods to restore the corresponding formation layers. Gas logging involves measuring and analyzing gases in the formation to preliminarily determine the properties of formation fluids and indirectly conduct preliminary evaluations of the formation reservoir. During drilling operations, gas logging can not only promptly detect oil and gas shows and preliminarily determine the properties of oil and gas layers, but also detect gas anomalies detected after pump restart due to formation fluids entering the drilling fluid following pump shutdown. These anomalies may be single peaks or false aftereffects. The repositioning of aftereffects involves the oil and gas surge velocity, which is divided into the actual static oil and gas surge velocity and the oil and gas surge velocity under the displacement of drill strings. The static surge velocity can be used to calculate the safe period in the wellbore before drilling tools are deployed, such as in electrical logging operations. The displacement oil and gas surge velocity can be used to calculate the safe period in the wellbore after drilling tools are deployed, such as in long-distance drilling operations.
[0003] Currently, commonly used relocation methods include: single peak analysis, which, as the name suggests, uses a single peak to relocate oil and gas displays; total hydrocarbon and component value analysis and comparison, which uses total hydrocarbon and component values from different stratigraphic layers to relocate oil and gas displays; late arrival time method, which uses theoretical late arrival times to relocate oil and gas displays; and volumetric method, which uses wellbore volume to relocate oil and gas displays.
[0004] The main reasons for large reservoir positioning errors are as follows: During drilling, the displacement effect of the drilling fluid affects the upward velocity of oil and gas, exceeding the upward velocity of oil and gas when the drilling fluid is stationary, thus causing the upward velocity to deviate from the normal value and resulting in large reservoir positioning errors; the drilling fluid aftereffect positioning method used is simplistic, failing to consider interference factors during drilling fluid circulation, leading to poor reliability of the results; and numerous oil and gas shows and gas logging anomalies are discovered during drilling operations, with many high densities, making it difficult to perform positioning for each one individually. However, in actual drilling operations, many factors affect the aftereffects of this method, such as top penetration, impact, displacement, unstable displacement rates, mid-drilling pump reversal, and single-valve operation, resulting in a still high error rate. In summary, how to reduce the influencing factors in the oil drilling fluid aftereffect positioning process to minimize positioning errors remains a problem that needs further research. Summary of the Invention
[0005] In view of this, the purpose of this invention is to provide a method, apparatus, equipment, and medium for the post-effect repositioning of oil drilling fluid, which can reduce influencing factors and minimize the repositioning error of oil drilling fluid during the post-effect repositioning process. The specific solution is as follows:
[0006] Firstly, this application discloses a method for the aftereffect settling of oil drilling fluid, including:
[0007] Obtain target drilling fluid samples with bubble and oil slick characteristics when aftereffects occur during drilling;
[0008] The target drilling fluid sample was analyzed and tested using logging technology to obtain data on the n-alkanes and isoalkanes corresponding to the target drilling fluid sample.
[0009] The total hydrocarbon parameters and chromatographic component parameters are determined based on the data of n-alkanes and isoalkanes corresponding to the target drilling fluid sample.
[0010] The total hydrocarbon parameters and component parameters of the chromatogram are compared and analyzed with the total hydrocarbon parameters and component parameters of rock cuttings at different depths in the formation where oil and gas shows appear during drilling operations, in order to determine the depth corresponding to the target drilling fluid sample and perform post-drilling fluid aftereffect relocation with the bubble oil bloom characteristics.
[0011] Optionally, obtaining the target drilling fluid sample exhibiting bubble and oil slick characteristics during the drilling process includes:
[0012] Obtain a target drilling fluid sample with bubble and oil slick characteristics when aftereffects occur during drilling, and store the target drilling fluid sample in a sealed bottle.
[0013] Optionally, the step of analyzing and testing the target drilling fluid sample using logging technology to obtain the corresponding n-alkanes and isoalkanes data for the target drilling fluid sample includes:
[0014] The target drilling fluid sample was analyzed and tested using gas logging and pyrolysis gas chromatography techniques to obtain data on the n-alkanes and isoalkanes corresponding to the target drilling fluid sample.
[0015] Optionally, the target drilling fluid sample is analyzed and tested using gas logging techniques to obtain the corresponding n-alkane data, including:
[0016] The target drilling fluid sample is degassed to obtain the corresponding target gas sample, and the target gas sample is input into a chromatographic column to obtain the n-alkane data corresponding to the target drilling fluid sample.
[0017] Optional, also includes:
[0018] Determine the total hydrocarbon parameters and composition parameters of rock cuttings at different depths within the formations where oil and gas shows occur during drilling operations.
[0019] Optionally, determining the total hydrocarbon parameters and composition parameters of cuttings at different depths within the formation where oil and gas shows occur during drilling operations includes:
[0020] To obtain target rock cuttings samples at different depths from the formations where oil and gas shows occur during drilling operations;
[0021] The target rock cuttings sample was analyzed and tested using well logging technology to obtain the corresponding n-alkanes and isoalkanes data.
[0022] The total hydrocarbon parameters and composition parameters of the rock fragments at different depths are determined based on the n-alkanes and isoalkanes data corresponding to the target rock fragment samples.
[0023] Optionally, the step of comparing and analyzing the total hydrocarbon parameters and the component parameters of the chromatogram with the total hydrocarbon parameters and component parameters of rock cuttings at different depths in the formation where oil and gas shows appear during drilling operations, in order to determine the depth corresponding to the target drilling fluid sample and perform post-drilling fluid aftereffect relocation with the bubble oil bloom characteristics, includes:
[0024] The total hydrocarbon parameters and the component parameters of the chromatography are compared and analyzed with the total hydrocarbon parameters and component parameters of rock cuttings at different depths in the formations where oil and gas shows occur during drilling operations, and the target difference between the corresponding parameters is obtained.
[0025] The target rock cuttings with the target difference within the preset difference standard range of the corresponding parameters are determined, and the depth corresponding to the target drilling fluid sample is determined according to the depth of the target rock cuttings, and the drilling fluid aftereffect with the bubble oil slick characteristics is returned to its original position.
[0026] Secondly, this application discloses a post-drilling fluid repositioning device, comprising:
[0027] The sample acquisition module is used to acquire target drilling fluid samples with bubble and oil slick characteristics when aftereffects occur during the drilling process.
[0028] The sample analysis and testing module is used to analyze and test the target drilling fluid sample using logging technology to obtain the corresponding n-alkanes and isoalkanes data of the target drilling fluid sample.
[0029] The parameter determination module is used to determine the chromatographic total hydrocarbon parameters and chromatographic component parameters based on the n-alkanes and isoalkanes corresponding to the target drilling fluid sample.
[0030] The aftereffect relocation module is used to compare and analyze the total hydrocarbon parameters and component parameters of the chromatogram with the total hydrocarbon parameters and component parameters of rock cuttings at different depths in the formation where oil and gas shows occur during drilling operations, so as to determine the depth corresponding to the target drilling fluid sample and perform aftereffect relocation of the drilling fluid with the bubble oil slick characteristics.
[0031] Thirdly, this application discloses an electronic device, comprising:
[0032] Memory, used to store computer programs;
[0033] A processor is configured to execute the computer program to implement the steps of the aforementioned disclosed method for the aftereffect repositioning of oil drilling fluid.
[0034] Fourthly, this application discloses a computer-readable storage medium for storing a computer program; wherein, when the computer program is executed by a processor, it implements the steps of the aforementioned oil drilling fluid aftereffect repositioning method.
[0035] This application involves acquiring a target drilling fluid sample exhibiting bubble-like oil slick characteristics during the drilling process to perform post-drilling fluid relocation. The sample is analyzed using logging technology to obtain data on the corresponding n-alkanes and isoalkanes. Then, based on this data, chromatographic total hydrocarbon parameters and chromatographic component parameters are determined. Finally, these parameters are compared with those of cuttings at different depths within the formations showing oil and gas shows during drilling operations to determine the depth corresponding to the target drilling fluid sample and to perform post-drilling fluid relocation with the bubble-like oil slick characteristics. As can be seen, in the post-drilling fluid relocation process of this application, the target drilling fluid sample is analyzed using logging technology to obtain the corresponding n-alkanes and isoalkanes. Then, the chromatographic total hydrocarbon parameters and chromatographic component parameters of the target drilling fluid sample are determined and compared with the total hydrocarbon parameters and component parameters of cuttings from different depths to determine the corresponding depth of the target drilling fluid sample and perform post-drilling fluid relocation. Therefore, in the post-drilling fluid relocation process of this application, only the target drilling fluid sample exhibiting bubble and oil slick characteristics needs to be taken and analyzed. The timing of the bubble and oil slick appearance is irrelevant, and the analysis of total hydrocarbon parameters and component parameters is not directly related to the timing of bubble and oil slick appearance. This makes the technical solution of this application less affected by factors in actual drilling operations compared to the late-time method and volumetric method in existing technologies. Thus, it has high relocation accuracy and practical value in the post-drilling fluid relocation process and provides a direct contribution to the final oil and gas layer interpretation in logging. In summary, this application can reduce the influencing factors during the aftereffect settling process of oil drilling fluid, resulting in a smaller settling error. Attached Figure Description
[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0037] Figure 1 A flowchart of a method for the aftereffect repositioning of oil drilling fluid provided in this application;
[0038] Figure 2 A flowchart of a specific method for the aftereffect repositioning of oil drilling fluid provided in this application;
[0039] Figure 3 A schematic diagram of the corresponding data obtained by the gas logging method provided in this application;
[0040] Figure 4 The corresponding chromatogram obtained by the pyrolysis gas chromatography method provided in this application;
[0041] Figure 5 Distribution diagram of oil source identification parameters provided in this application for pyrolysis gas chromatography;
[0042] Figure 6 The distribution map of characteristic parameters of crude oil obtained by pyrolysis gas chromatography provided in this application;
[0043] Figure 7 The scatter plot of the gas measurement group provided in this application;
[0044] Figure 8 A comparison chart of the target drilling fluid sample provided in this application and cuttings gas logging data at different depths;
[0045] Figure 9 A comparison diagram of the target drilling fluid sample provided in this application and gas chromatography data of rock cuttings pyrolysis at different depths;
[0046] Figure 10 A schematic diagram of a post-effect repositioning device for oil drilling fluid provided in this application;
[0047] Figure 11 This application provides a structural diagram of an electronic device. Detailed Implementation
[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.
[0049] Currently, commonly used relocation methods include: single-peak analysis, which uses a single peak to locate oil and gas shows; total hydrocarbon and component value analysis and comparison, which uses the total hydrocarbon and component values of different layers to locate oil and gas shows; late arrival time method, which uses the theoretical late arrival time to locate oil and gas shows; and volumetric method, which uses the wellbore volume to locate oil and gas shows. The main reasons for large relocation errors in oil and gas layers are: during drilling, the displacement effect of drilling fluid affects the upward velocity of oil and gas, exceeding the upward velocity of oil and gas when the drilling fluid is stationary, causing the upward velocity to deviate from normal values, thus resulting in large relocation errors; the use of a single drilling fluid aftereffect relocation method, which does not consider interference factors during drilling fluid circulation, resulting in poor reliability of the results; and the discovery of numerous oil and gas show layers and many gas logging anomalies during operation, with high density, making it difficult to relocate each layer individually. However, in actual drilling operations, this method is affected by many factors, such as top penetration, impact, displacement, unstable discharge rate, pump reversal, and single valves during drilling, resulting in a still high error rate. Therefore, this application provides a method for the post-effect repositioning of oil drilling fluids, which reduces the influencing factors and minimizes the repositioning error during the process.
[0050] This invention discloses a method for the aftereffect settling of oil drilling fluid, see [link to relevant documentation]. Figure 1 As shown, the method includes:
[0051] Step S11: Obtain a target drilling fluid sample with bubble oil slick characteristics when aftereffects occur during the drilling process.
[0052] In this embodiment, a target drilling fluid sample exhibiting the characteristic of bubbly oil slicks during the aftereffects of drilling is first acquired. It is understood that a unique display, namely bubbly oil slicks, will appear on the surface of the drilling fluid during the aftereffects. Specifically, a target drilling fluid sample exhibiting the bubbly oil slick characteristic during the aftereffects of drilling is acquired and sealed in a sealed bottle. By acquiring a target drilling fluid sample exhibiting the bubbly oil slick characteristic during the aftereffects of drilling and storing it in a sealed bottle, inaccurate data obtained from subsequent analysis and testing due to contact between the sample and air is prevented. This ensures the accuracy of the corresponding n-alkanes and isoalkanes data obtained from subsequent analysis and testing of the target drilling fluid sample using logging technology.
[0053] Step S12: Analyze and test the target drilling fluid sample using logging technology to obtain the corresponding n-alkanes and isoalkanes data for the target drilling fluid sample.
[0054] In this embodiment, the drilling fluid sample taken when aftereffects occur is analyzed. Specifically, the target drilling fluid sample is analyzed using logging technology to obtain its characteristics, including n-alkanes and isoalkanes. This technical solution obtains the n-alkanes and isoalkanes corresponding to the target drilling fluid sample, facilitating the subsequent determination of the total hydrocarbon parameters and chromatographic component parameters of the target drilling fluid sample based on this data.
[0055] Step S13: Determine the total hydrocarbon parameters and chromatographic component parameters based on the n-alkanes and isoalkanes data corresponding to the target drilling fluid sample.
[0056] In this embodiment, the chromatographic total hydrocarbon parameters and chromatographic component parameters of the target drilling fluid sample are determined based on the n-alkanes and isoalkanes corresponding to the target drilling fluid sample. This technical solution facilitates subsequent comparison of the chromatographic total hydrocarbon parameters and chromatographic component parameters of the target drilling fluid sample with the total hydrocarbon parameters and component parameters of rock cuttings at different depths, thereby determining the depth corresponding to the target drilling fluid sample.
[0057] Step S14: Compare and analyze the total hydrocarbon parameters and component parameters of the chromatogram with the total hydrocarbon parameters and component parameters of rock cuttings at different depths in the formation where oil and gas shows appear during the drilling operation to determine the depth corresponding to the target drilling fluid sample and perform post-drilling fluid aftereffect relocation with the bubble oil bloom characteristics.
[0058] In this embodiment, the method further includes: determining the total hydrocarbon parameters and composition parameters of cuttings at different depths within the formations where oil and gas shows appear during drilling operations. Specifically, target cuttings samples at different depths within the formations where oil and gas shows appear during drilling operations are acquired; the target cuttings samples are analyzed using well logging technology to obtain the corresponding n-alkanes and isoalkanes data; and the total hydrocarbon parameters and composition parameters of the cuttings at different depths are determined based on the corresponding n-alkanes and isoalkanes data.
[0059] In this embodiment, the depth corresponding to the target drilling fluid sample is determined by comparing the chromatographic total hydrocarbon parameters and chromatographic component parameters with the total hydrocarbon parameters and component parameters of rock cuttings at different depths in the formation where oil and gas shows appear during drilling operations. This allows for the relocation of drilling fluid with the characteristic oil slick / bubble feature. It is understood that when the difference between the chromatographic total hydrocarbon parameters and chromatographic component parameters and the total hydrocarbon parameters and component parameters of the target rock cuttings is within a preset standard range, it indicates that the oil slicks and bubbles in the target drilling fluid sample originate from the corresponding depth of the target rock cuttings. Through the above technical solution, the depth corresponding to the target drilling fluid sample is determined, and the relocation of drilling fluid with the characteristic oil slick / bubble feature is performed.
[0060] As can be seen, in this embodiment, during the post-drilling fluid relocation process, the target drilling fluid sample is analyzed using logging technology to obtain corresponding n-alkanes and isoalkanes. Then, the chromatographic total hydrocarbon parameters and chromatographic component parameters of the target drilling fluid sample are determined and compared with the total hydrocarbon parameters and component parameters of cuttings from different depths. This determines the corresponding depth of the target drilling fluid sample and facilitates the post-drilling fluid relocation. Therefore, in the post-drilling fluid relocation process, this application only requires taking and analyzing the target drilling fluid sample exhibiting bubble and oil slick characteristics. The timing of the bubble and oil slick appearance is irrelevant, and the analysis of total hydrocarbon and component parameters is not directly related to the timing of bubble and oil slick appearance. Compared to the late arrival time method and volumetric method in the prior art, the technical solution in this application has fewer influencing factors in actual drilling operations, resulting in high relocation accuracy and practical value during the post-drilling fluid relocation process, and providing a direct contribution to the final oil and gas layer interpretation in logging. In summary, this application can reduce the influencing factors during the aftereffect settling process of oil drilling fluid, resulting in a smaller settling error.
[0061] See Figure 2 As shown, this embodiment of the invention discloses a specific method for the aftereffect repositioning of oil drilling fluid. Compared with the previous embodiment, this embodiment further explains and optimizes the technical solution.
[0062] Step S21: Obtain a target drilling fluid sample with bubble oil slick characteristics when aftereffects occur during the drilling process.
[0063] Step S22: The target drilling fluid sample is analyzed and tested using gas logging and pyrolysis gas chromatography in well logging technology to obtain the corresponding n-alkanes and isoalkanes data of the target drilling fluid sample.
[0064] In this embodiment, the target drilling fluid sample is degassed to obtain a corresponding target gas sample, which is then input into a chromatographic column to obtain the n-alkane data corresponding to the target drilling fluid sample. In a specific implementation, the corresponding data obtained by analyzing and testing the target drilling fluid sample using gas logging methods is as follows: Figure 3 As shown. Further, the target drilling fluid sample is analyzed and tested using pyrolysis gas chromatography to obtain corresponding data. The target drilling fluid sample is input into a pyrolysis gas chromatograph, and the corresponding chromatogram is detected as shown. Figure 4 As shown, the horizontal axis represents time, the vertical axis represents millivolts, and the corresponding vertical lines represent n-alkanes. Each vertical line represents a type of alkane. The parameters obtained above are used to interpret the fluid properties in the reservoir and to obtain the characteristic properties of the corresponding crude oil. The distribution diagram of oil source identification parameters from pyrolysis gas chromatography is shown below. Figure 5 As shown, the horizontal axis represents parameters and the vertical axis represents peak intensity. The similarity of these parameters helps determine whether the oil comes from the same source or from the same reservoir. The distribution of characteristic parameters of crude oil from pyrolysis gas chromatography is shown in the figure below. Figure 6 As shown, the horizontal axis represents the carbon number of n-alkane hydrocarbons, and the vertical axis represents the carbon content. The similarity of these crude oil characteristic parameters is used to determine whether the oil comes from the same source or from the same reservoir. The gas sampling group dispersion map is shown below. Figure 7 As shown, the horizontal axis represents the humidity ratio parameter, and the vertical axis represents the relative methane content parameter. By plotting data from different samples, a high degree of similarity to a preset value indicates that the crude oil originates from the same depth. Through the above technical solution, the n-alkanes and isoalkanes corresponding to the target drilling fluid sample are obtained, facilitating the subsequent determination of the total hydrocarbon parameters and chromatographic component parameters of the target drilling fluid sample using these data.
[0065] Step S23: Determine the total hydrocarbon parameters and chromatographic component parameters based on the n-alkanes and isoalkanes data corresponding to the target drilling fluid sample.
[0066] In this embodiment, the chromatographic total hydrocarbon parameters and chromatographic component parameters are determined based on the n-alkanes and isoalkanes corresponding to the target drilling fluid sample. That is, the chromatographic parameters are chromatographic logging data including C1 / (C1+C2+C3+C4+C5), (C1+C2) / (C3+C4+C5), and (C2+C3+C4+C5) / (C1+C2+C3+C4+C5), where C1 / (C1+C2+C3+C4+C5) is the ratio of carbon 1 to the sum of carbon 2, carbon 3, carbon 4, and carbon 5; (C1+C2) / (C3+C4+C5) is the ratio of the sum of carbon 1 and carbon 2 to the sum of carbon 3, carbon 4, and carbon 5; (C2+C3+C4+C5) / (C1+C2+C3+C4+C5) is the ratio of the sum of carbon 2, carbon 3, carbon 4, and carbon 5 to the sum of carbon 1 to the sum of carbon 2, carbon 3, carbon 4, and carbon 5; and (C2+C3+C4+C5) / (C1+C2+C3+C4+C5) / (C1+C2+C3+C4+C5) is the ratio of the sum of carbon 2, carbon 3, carbon 4, and carbon 5 to the sum of carbon 1. (1+C2+C3+C4+C5) equals 100 - relative methane content; the chromatographic component parameters are pyrolysis gas chromatographic data including Pr / Ph, Pr / nC17, Ph / nC18, (∑nC21- / ∑nC22+), (nC21+nC22) / (nC28+nC29), where Pr / Ph is the ratio of pterostilbene to phytane, Pr / nC17 is the ratio of pterostilbene to C17, Ph / nC18 is the ratio of phytane to C18, (∑nC21- / ∑nC22+) is the ratio of all n-alkanes before C21 to all n-alkanes after C22, and (nC21+nC22) / (nC28+nC29) is the ratio of the sum of C21 and C22 to the sum of C28 and C29. The above technical solution yields the target chromatographic total hydrocarbon parameters and chromatographic component parameters, which are then compared with the total hydrocarbon parameters and component parameters of rock cuttings at different depths to determine the depth corresponding to the target drilling fluid sample.
[0067] Step S24: Compare and analyze the total hydrocarbon parameters and component parameters of the chromatogram with the total hydrocarbon parameters and component parameters of rock cuttings at different depths in the formation where oil and gas shows appear during the drilling operation to determine the depth corresponding to the target drilling fluid sample and perform post-drilling fluid aftereffect relocation with the bubble oil bloom characteristics.
[0068] Specifically, the total hydrocarbon parameters and component parameters of the chromatogram are compared and analyzed with the total hydrocarbon parameters and component parameters of cuttings at different depths in the formations where oil and gas shows appear during drilling operations, and the target difference between the corresponding parameters is obtained; target cuttings whose target difference is within the preset difference standard range of the corresponding parameters are determined, and the depth corresponding to the target drilling fluid sample is determined according to the depth of the target cuttings, and drilling fluid post-effect relocation with the bubble oil slick characteristics is performed. In one specific embodiment, the data relocation standard of gas logging is: The total hydrocarbon parameters obtained from the chromatographic analysis are compared with those from cuttings at different depths. Specifically, the total hydrocarbon parameters obtained from the target drilling fluid sample are compared with the average values of gas logging data from reservoir depths showing oil and gas indications during drilling. The depth from which the bubbly oil slick originates can be determined by the difference between the parameters; if the difference is within the standard range. A comparison chart of the target drilling fluid sample and gas logging data from cuttings at different depths is shown below. Figure 8 As shown, a comparison of the gas logging data of the cuttings and drilling fluid above reveals that the data analyzed from the 5200m drilling fluid is basically consistent with the data from the 4220m cuttings. Therefore, it can be determined that the oil slicks and bubbles in the 5200m drilling fluid originate from the 4220m cuttings. In one specific embodiment, the data relocation standard for pyrolysis gas chromatography is as follows: The chromatographic parameters are compared with those of cuttings from different depths. Specifically, the pyrolysis gas chromatography data corresponding to the target drilling fluid sample are compared with the average value of cuttings data showing oil and gas indications during drilling. If the difference in the data analysis is within the standard range, it can be determined that the oil and gas are located in the same layer. A comparison graph of the target drilling fluid sample and pyrolysis gas chromatography data of cuttings from different depths is shown below. Figure 9 As shown, the comparison of the pyrolysis gas chromatography data of the cuttings and drilling fluid reveals that the data from the 3600m drilling fluid analysis is largely consistent with the data from the 3020m cuttings. Therefore, it can be determined that the oil slicks and bubbles in the 3600m drilling fluid originate from the 3020m cuttings. Through the above technical solution, by comparing the total hydrocarbon parameters and component parameters of the chromatogram with the total hydrocarbon parameters and component parameters of cuttings at different depths in the formations where oil and gas shows appear during drilling operations, the depth corresponding to the target drilling fluid sample can be determined, and the drilling fluid with the characteristics of oil slicks and bubbles can be repositioned. This reduces the number of influencing factors and minimizes errors during the repositioning of oil drilling fluids.
[0069] See Figure 10 As shown in the figure, this application discloses an aftereffect return device for oil drilling fluid, comprising:
[0070] Sample acquisition module 11 is used to acquire target drilling fluid samples with bubble oil droplet characteristics when aftereffects occur during drilling;
[0071] The sample analysis and testing module 12 is used to analyze and test the target drilling fluid sample using logging technology to obtain the data of n-alkanes and isoalkanes corresponding to the target drilling fluid sample.
[0072] Parameter determination module 13 is used to determine the total hydrocarbon parameters and chromatographic component parameters of the chromatogram based on the n-alkanes and isoalkanes corresponding to the target drilling fluid sample.
[0073] The aftereffect relocation module 14 is used to compare and analyze the total hydrocarbon parameters and component parameters of the chromatogram with the total hydrocarbon parameters and component parameters of rock cuttings at different depths in the formation where oil and gas shows appear during drilling operations, so as to determine the depth corresponding to the target drilling fluid sample and perform aftereffect relocation of the drilling fluid with the bubble oil slick characteristics.
[0074] As can be seen, in this embodiment, during the post-drilling fluid relocation process, the target drilling fluid sample is analyzed using logging technology to obtain corresponding n-alkanes and isoalkanes. Then, the chromatographic total hydrocarbon parameters and chromatographic component parameters of the target drilling fluid sample are determined and compared with the total hydrocarbon parameters and component parameters of cuttings from different depths. This determines the corresponding depth of the target drilling fluid sample and facilitates the post-drilling fluid relocation. Therefore, in the post-drilling fluid relocation process, this application only requires taking and analyzing the target drilling fluid sample exhibiting bubble and oil slick characteristics. The timing of the bubble and oil slick appearance is irrelevant, and the analysis of total hydrocarbon and component parameters is not directly related to the timing of bubble and oil slick appearance. Compared to the late arrival time method and volumetric method in the prior art, the technical solution in this application has fewer influencing factors in actual drilling operations, resulting in high relocation accuracy and practical value during the post-drilling fluid relocation process, and providing a direct contribution to the final oil and gas layer interpretation in logging. In summary, this application can reduce the influencing factors during the aftereffect settling process of oil drilling fluid, resulting in a smaller settling error.
[0075] In some specific embodiments, the sample acquisition module 11 is specifically used to: acquire a target drilling fluid sample with bubble oil slick characteristics when aftereffects occur during drilling, and store the target drilling fluid sample in a sealed bottle for safekeeping.
[0076] In some specific embodiments, the sample analysis and testing module 12 is specifically used to: analyze and test the target drilling fluid sample using gas logging and pyrolysis gas chromatography in logging technology, so as to obtain the n-alkanes and isoalkanes corresponding to the target drilling fluid sample.
[0077] In some specific embodiments, the sample analysis and testing module 12 is specifically used to: obtain the corresponding target gas sample from the target drilling fluid sample through a degasser, and input the target gas sample into a chromatographic column to obtain the n-alkane data corresponding to the target drilling fluid sample.
[0078] In some specific embodiments, the oil drilling fluid aftereffect return device further includes:
[0079] The cuttings parameter determination module is used to determine the total hydrocarbon parameters and composition parameters of cuttings at different depths in the formations where oil and gas shows occur during drilling operations.
[0080] In some specific embodiments, the rock cuttings parameter determination module specifically includes:
[0081] The cuttings sample acquisition unit is used to acquire target cuttings samples at different depths in the formations where oil and gas shows occur during drilling operations.
[0082] The cuttings sample analysis unit is used to analyze and test the target cuttings sample using logging technology to obtain the corresponding n-alkanes and isoalkanes data of the target cuttings sample;
[0083] The rock cuttings parameter determination unit is used to determine the total hydrocarbon parameters and composition parameters of the rock cuttings at different depths based on the n-alkanes and isoalkanes data corresponding to the target rock cuttings sample.
[0084] In some specific embodiments, the aftereffect relocation module 14 specifically includes:
[0085] The target difference determination unit is used to compare and analyze the total hydrocarbon parameters and component parameters of the chromatographic total hydrocarbon parameters and the chromatographic component parameters with the total hydrocarbon parameters and component parameters of rock cuttings at different depths in the formation where oil and gas shows occur during drilling operations, and to obtain the target difference between the corresponding parameters.
[0086] The depth determination unit is used to determine the target rock cuttings whose target difference is within the preset difference standard range of the corresponding parameters, and to determine the depth corresponding to the target drilling fluid sample based on the depth of the target rock cuttings and to perform drilling fluid aftereffect repositioning with the bubble oil slick characteristics.
[0087] Figure 11The illustration shows an electronic device 20 provided in an embodiment of this application. This electronic device 20 may further include: at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input / output interface 25, and a communication bus 26. The memory 22 stores a computer program, which is loaded and executed by the processor 21 to implement the relevant steps in the oil drilling fluid aftereffect relocation method disclosed in any of the foregoing embodiments. Alternatively, the electronic device 20 in this embodiment may specifically be an electronic computer.
[0088] In this embodiment, the power supply 23 is used to provide voltage to the various hardware devices on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and external devices, and the communication protocol it follows can be any communication protocol applicable to the technical solution of this application, and is not specifically limited here; the input / output interface 25 is used to acquire external input data or output data to the outside world, and its specific interface type can be selected according to the specific application needs, and is not specifically limited here.
[0089] In addition, the memory 22, as a carrier for resource storage, can be a read-only memory, random access memory, disk or optical disk, etc. The resources stored thereon can include operating system 221, computer program 222, etc., and the storage method can be temporary storage or permanent storage.
[0090] The operating system 221 is used to manage and control the various hardware devices on the electronic device 20 and the computer program 222, which may be Windows Server, Netware, Unix, Linux, etc. In addition to including a computer program capable of performing the oil drilling fluid aftereffect repositioning method executed by the electronic device 20 as disclosed in any of the foregoing embodiments, the computer program 222 may further include a computer program capable of performing other specific tasks.
[0091] Furthermore, this application also discloses a computer-readable storage medium for storing a computer program; wherein, when the computer program is executed by a processor, it implements the aforementioned method for the aftereffect settling of oil drilling fluid. Specific steps of this method can be found in the corresponding content disclosed in the foregoing embodiments, and will not be repeated here.
[0092] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0093] The foregoing has provided a detailed description of the method, apparatus, equipment, and medium for the post-effect repositioning of oil drilling fluid provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.
Claims
1. A method for the aftereffect reset of petroleum drilling fluid, characterized in that, include: Obtain target drilling fluid samples with bubble and oil slick characteristics when aftereffects occur during drilling; The target drilling fluid sample was analyzed and tested using logging technology to obtain data on the n-alkanes and isoalkanes corresponding to the target drilling fluid sample. The total hydrocarbon parameters and chromatographic component parameters are determined based on the data of n-alkanes and isoalkanes corresponding to the target drilling fluid sample. The total hydrocarbon parameters and component parameters of the chromatogram are compared and analyzed with the total hydrocarbon parameters and component parameters of rock cuttings at different depths in the formation where oil and gas shows appear during drilling operations, in order to determine the depth corresponding to the target drilling fluid sample and perform drilling fluid aftereffect relocation with the bubble oil slick characteristics. The step of analyzing and testing the target drilling fluid sample using logging technology to obtain data on the corresponding n-alkanes and isoalkanes includes: The target drilling fluid sample was analyzed and tested using gas logging and pyrolysis gas chromatography techniques to obtain data on the n-alkanes and isoalkanes corresponding to the target drilling fluid sample. The analysis and testing of the target drilling fluid sample using gas logging technology to obtain the corresponding n-alkane data for the target drilling fluid sample includes: The target drilling fluid sample is degassed to obtain the corresponding target gas sample, and the target gas sample is input into a chromatographic column to obtain the n-alkane data corresponding to the target drilling fluid sample; This also includes: Determine the total hydrocarbon parameters and composition parameters of rock cuttings at different depths in the formations where oil and gas shows occur during drilling operations; The determination of total hydrocarbon parameters and composition parameters of cuttings at different depths within the formations where oil and gas shows occur during drilling operations includes: To obtain target rock cuttings samples at different depths from the formations where oil and gas shows occur during drilling operations; The target rock cuttings sample was analyzed and tested using well logging technology to obtain the corresponding n-alkanes and isoalkanes data. The total hydrocarbon parameters and composition parameters of the rock fragments at different depths are determined based on the data of n-alkanes and isoalkanes corresponding to the target rock fragment samples. The step of comparing and analyzing the total hydrocarbon parameters and component parameters of the chromatogram with the total hydrocarbon parameters and component parameters of rock cuttings at different depths in the formation where oil and gas shows appear during drilling operations, in order to determine the depth corresponding to the target drilling fluid sample and perform post-drilling fluid aftereffect relocation with the bubble oil bloom characteristics, includes: The total hydrocarbon parameters and the component parameters of the chromatography are compared and analyzed with the total hydrocarbon parameters and component parameters of rock cuttings at different depths in the formations where oil and gas shows occur during drilling operations, and the target difference between the corresponding parameters is obtained. The target rock cuttings with the target difference within the preset difference standard range of the corresponding parameters are determined, and the depth corresponding to the target drilling fluid sample is determined according to the depth of the target rock cuttings, and the drilling fluid aftereffect with the bubble oil slick characteristics is returned to its original position.
2. The method for repositioning oil drilling fluid aftereffects according to claim 1, characterized in that, The acquisition of target drilling fluid samples exhibiting bubble and oil slick characteristics during the drilling process includes: Obtain a target drilling fluid sample with bubble and oil slick characteristics when aftereffects occur during drilling, and store the target drilling fluid sample in a sealed bottle.
3. A post-drilling fluid repositioning device, characterized in that, include: The sample acquisition module is used to acquire target drilling fluid samples with bubble and oil slick characteristics when aftereffects occur during the drilling process. The sample analysis and testing module is used to analyze and test the target drilling fluid sample using logging technology to obtain the corresponding n-alkanes and isoalkanes data of the target drilling fluid sample. The parameter determination module is used to determine the chromatographic total hydrocarbon parameters and chromatographic component parameters based on the n-alkanes and isoalkanes corresponding to the target drilling fluid sample. The aftereffect relocation module is used to compare and analyze the total hydrocarbon parameters and component parameters of the chromatogram with the total hydrocarbon parameters and component parameters of rock cuttings at different depths in the formation where oil and gas shows appear during drilling operations, so as to determine the depth corresponding to the target drilling fluid sample and perform aftereffect relocation of the drilling fluid with the bubble oil slick characteristics. Specifically, the sample analysis and testing module is used to analyze and test the target drilling fluid sample using gas logging and pyrolysis gas chromatography in logging technology, so as to obtain the data of n-alkanes and isoalkanes corresponding to the target drilling fluid sample. Specifically, the sample analysis and testing module is used to: obtain the corresponding target gas sample from the target drilling fluid sample through a degasser, and input the target gas sample into a chromatographic column to obtain the n-alkane data corresponding to the target drilling fluid sample; The device further includes: The cuttings parameter determination module is used to determine the total hydrocarbon parameters and composition parameters of cuttings at different depths in the formations where oil and gas shows occur during drilling operations. The rock cuttings parameter determination module includes: The cuttings sample acquisition unit is used to acquire target cuttings samples at different depths in the formations where oil and gas shows occur during drilling operations. The cuttings sample analysis unit is used to analyze and test the target cuttings sample using logging technology to obtain the corresponding n-alkanes and isoalkanes data of the target cuttings sample; The rock cuttings parameter determination unit is used to determine the total hydrocarbon parameters and composition parameters of the rock cuttings at different depths based on the n-alkanes and isoalkanes data corresponding to the target rock cuttings sample. The post-reset module includes: The target difference determination unit is used to compare and analyze the total hydrocarbon parameters and component parameters of the chromatographic total hydrocarbon parameters and the chromatographic component parameters with the total hydrocarbon parameters and component parameters of rock cuttings at different depths in the formation where oil and gas shows occur during drilling operations, and to obtain the target difference between the corresponding parameters. The depth determination unit is used to determine the target rock cuttings whose target difference is within the preset difference standard range of the corresponding parameters, and to determine the depth corresponding to the target drilling fluid sample based on the depth of the target rock cuttings and to perform drilling fluid aftereffect repositioning with the bubble oil slick characteristics.
4. An electronic device, characterized in that, include: Memory, used to store computer programs; A processor is configured to execute the computer program to implement the steps of the oil drilling fluid aftereffect repositioning method as described in claim 1 or 2.
5. A computer-readable storage medium, characterized in that, Used to store a computer program; wherein, when the computer program is executed by a processor, it implements the steps of the oil drilling fluid aftereffect repositioning method as described in claim 1 or 2.