Interpretation chart establishing method and device based on drilling time ratio and hydrocarbon contrast coefficient

Abstract

The invention relates to the technical field of oil and gas field exploration, in particular to an explanation chart establishing method and device based on a drilling time ratio and a hydrocarbon contrast coefficient, and the method comprises the steps: establishing an explanation chart by taking the drilling time ratio as a horizontal axis and the hydrocarbon contrast coefficient as a longitudinal axis; and acquiring gas logging information acquired and recorded by a logging device, determining the drilling time ratio and the hydrocarbon contrast coefficient of each data point, and placing the data points in the interpretation chart. According to the method, the gas logging information collected and recorded by the logging device is obtained, the drilling time ratio and the hydrocarbon comparison coefficient of each data point are determined, the drilling time ratio is taken as the horizontal axis, the hydrocarbon comparison coefficient is taken as the longitudinal axis, and the interpretation chart is established, so that the interpretation chart can reflect the physical property of the reservoir and the quality of gas logging display, and a basis is provided for identification of an oil layer, a low-yield oil layer, a dry layer and a water layer.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas field exploration, and is a method and a device for establishing an interpretation chart based on a drilling time ratio and a hydrocarbon contrast coefficient. Background Art

[0002] Gas logging interpretation method is an evaluation method that uses the internal rules of gas logging data to determine the properties of reservoir fluids. The commonly used methods are curve morphology method and plate method. The plate method uses statistical and correlation analysis methods to analyze a certain ratio relationship of hydrocarbons and find certain regularities between specific hydrocarbon ratios.

[0003] Commonly used gas logging evaluation charts at home and abroad include the Pixler method, the triangle chart method, the 3H method, the light hydrocarbon ratio method, the ethane / propane ratio method, the gas evaluation method, the double logarithmic ratio method, etc. These charts are based on the relationship between gas logging components, and do not reflect the physical properties of the reservoir and the quality of gas logging display. This makes it impossible to distinguish between oil-dry layers and oil layers, because the oil-dry layers and oil layers are consistent in component characteristics, and the common feature of these methods is that the gas logging component requirements are complete, at least the absolute percentage of C3 is greater than 0.01%. In addition, tight oil belongs to a source-reservoir integrated, self-generated and self-stored reservoir. The oil and gas have not been migrated or have only migrated at a short distance. The gas logging characteristics of the oil layer are similar to those of the non-oil layer (source rock), and cannot be identified on conventional charts. Summary of the invention

[0004] The present invention provides a method and device for establishing an interpretation map based on drilling time ratio and hydrocarbon contrast coefficient, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problem that the existing method for establishing gas logging interpretation maps is only based on the relationship between gas logging components and cannot reflect the reservoir properties and the quality of gas logging display.

[0005] One of the technical solutions of the present invention is achieved by the following measures: a method for establishing an interpretation chart based on drilling time ratio and hydrocarbon contrast coefficient, comprising:

[0006] With drilling time ratio as the horizontal axis and hydrocarbon contrast coefficient as the vertical axis, an interpretation chart is established;

[0007] Obtain the logging device to collect and record gas logging information, determine the drilling time ratio and hydrocarbon contrast coefficient of each data point, and place the data point on the interpretation plate.

[0008] The following are further optimizations and / or improvements to the above technical solutions:

[0009] The above-mentioned logging device collects and records gas measurement information, determines the drilling time ratio and hydrocarbon comparison coefficient of each data point, including:

[0010] Obtain logging equipment to collect and record gas measurement information;

[0011] Read the reservoir drilling time ROPs, and select the cap layer drilling time within the set range above the reservoir to determine the corresponding cap layer drilling time ROPn;

[0012] Using the caprock drilling time ROPn and the reservoir drilling time ROPs, the reservoir drilling time ratio ROPn / s is calculated.

[0013]

[0014] Take the maximum effective total hydrocarbon anomaly value TGmax of the reservoir and the total hydrocarbon anomaly value of the cap rock within a set range above the reservoir to determine the base value TGmin;

[0015] The hydrocarbon contrast coefficient Kc is calculated using the total hydrocarbon abnormal value TGmax and the base value TGmin;

[0016]

[0017] The above-mentioned reading of the reservoir drilling time ROPs and selecting the cap layer drilling time within a set range above the reservoir to determine the corresponding cap layer drilling time ROPn includes:

[0018] Read the reservoir drilling time ROPs, take the minimum effective value of the reservoir, and eliminate the drilling time data affected by single-root connection and tripping;

[0019] When selecting the caprock within the set range above the reservoir, calculate the initial average value ROPn1;

[0020] Eliminate the cap layer drilling time that is greater than or equal to 1.5 times the initial average value or less than or equal to 0.5 times the initial average value, calculate the average value ROPn2 again, and use the average value ROPn2 as the cap layer drilling time ROPn.

[0021] The above method takes the maximum effective total hydrocarbon anomaly value TGmax of the reservoir and the total hydrocarbon anomaly value of the cap rock within a set range above the reservoir to determine the base value TGmin, including:

[0022] Take the reservoir maximum effective total hydrocarbon abnormal value TGmax, and remove the data affected by single-root connection and tripping;

[0023] The total hydrocarbon anomaly values ​​of the cap rock within the set range above the reservoir are selected, and the corresponding average value is calculated as the base value TGmin.

[0024] The above also includes placing the data points on the interpretation map, dividing the interpretation map into multiple areas using dividing lines, wherein the divided areas include oil layer areas, low oil production layer areas, dry layer areas, and water layer areas.

[0025] The second technical solution of the present invention is achieved by the following measures: a device for establishing an interpretation chart based on drilling time ratio and hydrocarbon contrast coefficient, comprising:

[0026] First, a module is established, with the drilling time ratio as the horizontal axis and the hydrocarbon contrast coefficient as the vertical axis, to establish an interpretation chart;

[0027] The second module is to acquire and record the gas logging information collected by the logging device, determine the drilling time ratio and hydrocarbon comparison coefficient of each data point, and place the data point in the interpretation map.

[0028] The following are further optimizations and / or improvements to the above technical solutions:

[0029] The second building module includes:

[0030] Acquisition module, which acquires and records gas measurement information collected by the logging device;

[0031] The first intermediate value processing module reads the reservoir drilling time ROPs, and selects the cap layer drilling time within a set range above the reservoir to determine the corresponding cap layer drilling time ROPn;

[0032] The first interpretation processing module uses the caprock drilling time ROPn and the reservoir drilling time ROPs to calculate the reservoir drilling time ratio ROPn / s.

[0033]

[0034] The second intermediate value processing module takes the total hydrocarbon anomaly value TGmax of the reservoir with the maximum effective value and the total hydrocarbon anomaly value of the cap rock within a set range above the reservoir to determine the base value TGmin;

[0035] The second interpretation processing module calculates the hydrocarbon contrast coefficient Kc using the total hydrocarbon abnormal value TGmax and the base value TGmin;

[0036]

[0037] The above also includes a third establishment module, which places the data points on the interpretation map and divides the interpretation map into multiple areas using dividing lines, wherein the divided areas include oil layer areas, low-yield oil layer areas, dry layer areas, and water layer areas.

[0038] The present invention acquires gas logging information collected and recorded by a logging device, determines the drilling time ratio and hydrocarbon contrast coefficient of each data point, establishes an interpretation chart with the drilling time ratio as the horizontal axis and the hydrocarbon contrast coefficient as the vertical axis, so that the interpretation chart can reflect the reservoir physical properties and the quality of gas logging display, and provides a basis for identifying oil layers, low-yield oil layers, dry layers, and water layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Attached Figure 1 The present invention is a flow chart of a method.

[0040] Attached Figure 2The flowchart of the method for determining the drilling time ratio and hydrocarbon contrast coefficient of a data point in the present invention.

[0041] Attached Figure 3 The present invention is another method flow chart.

[0042] Attached Figure 4 It is a schematic diagram of the device structure of the present invention. DETAILED DESCRIPTION

[0043] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0044] The present invention will be further described below in conjunction with embodiments and drawings:

[0045] Embodiment 1: As attached Figure 1 As shown, the embodiment of the present invention discloses a method for establishing an interpretation chart based on drilling time ratio and hydrocarbon contrast coefficient, comprising:

[0046] Step S110, establishing an interpretation chart with the drilling time ratio as the horizontal axis and the hydrocarbon contrast coefficient as the vertical axis;

[0047] Step S120, obtaining the gas logging information collected and recorded by the logging device, determining the drilling time ratio and hydrocarbon comparison coefficient of each data point, and placing the data point in the interpretation plate.

[0048] In this embodiment, a logging device is used to collect and record gas logging information, determine the drilling time ratio and hydrocarbon comparison coefficient of each data point, and place the data point in the interpretation chart, wherein the logging device collects and records gas logging information including gas logging instruments, comprehensive logging instruments and other logging devices to collect and record drilling time, total hydrocarbons, hydrocarbon components and other gas logging information, and the gas logging information includes drilling time data and hydrocarbon content data.

[0049] In this example, the drilling time ratio is the horizontal axis and the hydrocarbon contrast coefficient is the vertical axis in the interpretation chart.

[0050] The present invention acquires gas logging information collected and recorded by a logging device, determines the drilling time ratio and hydrocarbon contrast coefficient of each data point, establishes an interpretation chart with the drilling time ratio as the horizontal axis and the hydrocarbon contrast coefficient as the vertical axis, so that the interpretation chart can reflect the reservoir physical properties and the quality of gas logging display, and provides a basis for identifying oil layers, low-yield oil layers, dry layers, and water layers.

[0051] Embodiment 2: As attached Figure 1 , 2 As shown, the embodiment of the present invention discloses a method for establishing an interpretation chart based on drilling time ratio and hydrocarbon contrast coefficient, comprising:

[0052] Step S210, establishing an interpretation chart with the drilling time ratio as the horizontal axis and the hydrocarbon contrast coefficient as the vertical axis.

[0053] Step S220, obtaining the gas logging information collected and recorded by the logging device, determining the drilling time ratio and hydrocarbon comparison coefficient of each data point, and placing the data point in the interpretation plate.

[0054] Step S220, wherein the logging device is used to collect and record gas measurement information, and the drilling time ratio and hydrocarbon comparison coefficient of each data point are determined, including:

[0055] S221, obtaining gas logging information collected and recorded by a logging device; wherein the gas logging information collected and recorded by a logging device includes gas logging information such as drilling time, total hydrocarbons, hydrocarbon components, etc. collected and recorded by a gas logging instrument, a comprehensive logging instrument, and other logging devices; the gas logging information includes drilling time data and hydrocarbon content data;

[0056] S222, read the reservoir drilling time ROPs (min / m), take the minimum effective value of the reservoir, and remove the drilling time data affected by single-root connection and tripping;

[0057] S223, when drilling the cap rock within a set range above the reservoir, calculate the initial average ROPn1; the set range in this step may be 5 to 20 m;

[0058] S224, eliminating the cap layer drilling time that is greater than or equal to 1.5 times the initial average value or less than or equal to 0.5 times the initial average value, and calculating the average value ROPn2 again, and using the average value ROPn2 as the cap layer drilling time ROPn;

[0059] S225, using the caprock drilling time ROPn and the reservoir drilling time ROPs, calculate the reservoir drilling time ratio ROPn / s,

[0060]

[0061] S226, taking the maximum effective total hydrocarbon abnormal value TGmax (%) of the reservoir, and eliminating the data affected by single-root connection and tripping;

[0062] S227, selecting the total hydrocarbon anomaly value of the cap rock within a set range above the reservoir, and obtaining the corresponding average value as the base value TGmin (%); the set range in this step may be 5 to 20 m;

[0063] S228, calculating the hydrocarbon contrast coefficient Kc using the total hydrocarbon abnormal value TGmax and the base value TGmin;

[0064]

[0065] Embodiment 3: As attached Figure 3 As shown, the embodiment of the present invention discloses a method for establishing an interpretation chart based on drilling time ratio and hydrocarbon contrast coefficient, comprising:

[0066] Step S310, establishing an interpretation chart with the drilling time ratio as the horizontal axis and the hydrocarbon contrast coefficient as the vertical axis;

[0067] Step S320, acquiring and recording gas logging information collected by a logging device, determining the drilling time ratio and hydrocarbon comparison coefficient of each data point, and placing the data point in an interpretation chart;

[0068] Step S330, after placing the data points on the interpretation map, the interpretation map is divided into a plurality of regions using dividing lines, wherein the divided regions include an oil layer region, a low-yield oil layer region, a dry layer region, and a water layer region.

[0069] In this embodiment, the drilling time data, i.e., the drilling time ratio, is used to reflect the reservoir physical properties, and the hydrocarbon content data, i.e., the hydrocarbon contrast coefficient, is used to reflect the oil and gas content of the reservoir; the ROPn / s-Kc intersection diagram is established by using the drilling time ratio (ROPn / s) and the hydrocarbon contrast coefficient (Kc) intersection interpretation method to identify and evaluate the fluid properties of the oil and gas display layer; and the diagram is divided into four areas, namely, oil layer, low oil production layer, dry layer, and water layer, to characterize the results of the interpretation and evaluation, thereby providing a strong technical guarantee for the evaluation of tight oil development.

[0070] Embodiment 4: As attached Figure 4 As shown, the embodiment of the present invention discloses a device for establishing an interpretation chart based on drilling time ratio and hydrocarbon contrast coefficient, comprising:

[0071] First, a module is established, with the drilling time ratio as the horizontal axis and the hydrocarbon contrast coefficient as the vertical axis, to establish an interpretation chart;

[0072] The second module is to acquire and record the gas logging information collected by the logging device, determine the drilling time ratio and hydrocarbon comparison coefficient of each data point, and place the data point in the interpretation chart;

[0073] The third module is to place the data points on the interpretation map, and then divide the interpretation map into multiple areas using dividing lines, wherein the divided areas include oil layer areas, low-yield oil layer areas, dry layer areas, and water layer areas.

[0074] The second building module includes:

[0075] Acquisition module, which acquires and records gas measurement information collected by the logging device;

[0076] The first intermediate value processing module reads the reservoir drilling time ROPs, and selects the cap layer drilling time within a set range above the reservoir to determine the corresponding cap layer drilling time ROPn;

[0077] The first interpretation processing module uses the caprock drilling time ROPn and the reservoir drilling time ROPs to calculate the reservoir drilling time ratio ROPn / s.

[0078]

[0079] The second intermediate value processing module takes the total hydrocarbon anomaly value TGmax of the reservoir with the maximum effective value and the total hydrocarbon anomaly value of the cap rock within a set range above the reservoir to determine the base value TGmin;

[0080] The second interpretation processing module calculates the hydrocarbon contrast coefficient Kc using the total hydrocarbon abnormal value TGmax and the base value TGmin;

[0081]

[0082] Embodiment 5: The embodiment of the present invention discloses a storage medium, on which a computer program readable by a computer is stored, and the computer program is configured to execute a method for establishing an interpretation plate based on drilling time ratio and hydrocarbon contrast coefficient when running.

[0083] The above storage medium may include, but is not limited to: a USB flash drive, a read-only memory, a mobile hard disk, a magnetic disk or an optical disk, and other media that can store computer programs.

[0084] Example 6: The embodiment of the present invention discloses an electronic device, including a processor and a memory, wherein the memory stores a computer program, and the computer program is loaded and executed by the processor to implement a method for establishing an interpretation map based on drilling time ratio and hydrocarbon comparison coefficient.

[0085] The processor may be a central processing unit (CPU), a general purpose processor, a digital signal processor (DSP), an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component or any combination thereof. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of this application. It may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The memory may include, but is not limited to, various media that can store computer programs, such as a USB flash drive, a read-only memory, a mobile hard disk, a magnetic disk or an optical disk.

[0086] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code. The scheme in the embodiments of the present application can be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0087] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0088] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0089] The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A method for establishing an interpretation chart based on drilling time ratio and hydrocarbon contrast coefficient, characterized in that: include: With drilling time ratio as the horizontal axis and hydrocarbon contrast coefficient as the vertical axis, an interpretation chart is established; Obtain the logging device to collect and record gas logging information, determine the drilling time ratio and hydrocarbon contrast coefficient of each data point, and place the data point on the interpretation plate.

2. The method for establishing an interpretation chart based on drilling time ratio and hydrocarbon contrast coefficient according to claim 1, characterized in that: The acquisition of the logging device to collect and record gas measurement information and determine the drilling time ratio and hydrocarbon comparison coefficient of each data point includes: Obtain logging equipment to collect and record gas measurement information; Read the reservoir drilling time ROPs, and select the cap layer drilling time within the set range above the reservoir to determine the corresponding cap layer drilling time ROPn; Using the caprock drilling time ROPn and the reservoir drilling time ROPs, the reservoir drilling time ratio ROPn / s is calculated. Take the maximum effective total hydrocarbon anomaly value TGmax of the reservoir and the total hydrocarbon anomaly value of the cap rock within a set range above the reservoir to determine the base value TGmin; The hydrocarbon contrast coefficient Kc is calculated using the total hydrocarbon abnormal value TGmax and the base value TGmin; 3. The method for establishing an interpretation chart based on drilling time ratio and hydrocarbon contrast coefficient according to claim 2, characterized in that: The method of reading the reservoir drilling time ROPs and selecting the cap layer drilling time within a set range above the reservoir to determine the corresponding cap layer drilling time ROPn includes: Read the reservoir drilling time ROPs, take the minimum effective value of the reservoir, and eliminate the drilling time data affected by single-root connection and tripping; When selecting the caprock within the set range above the reservoir, calculate the initial average value ROPn1; Eliminate the cap layer drilling time that is greater than or equal to 1.5 times the initial average value or less than or equal to 0.5 times the initial average value, calculate the average value ROPn2 again, and use the average value ROPn2 as the cap layer drilling time ROPn.

4. The method for establishing an interpretation chart based on drilling time ratio and hydrocarbon contrast coefficient according to claim 2 or 3, characterized in that: The method of taking the maximum effective total hydrocarbon abnormal value TGmax of the reservoir and the total hydrocarbon abnormal value of the cap rock within a set range above the reservoir to determine the base value TGmin includes: Take the reservoir maximum effective total hydrocarbon abnormal value TGmax, and remove the data affected by single-root connection and tripping; The total hydrocarbon anomaly values ​​of the cap rock within the set range above the reservoir are selected, and the corresponding average value is calculated as the base value TGmin.

5. The method for establishing an interpretation chart based on drilling time ratio and hydrocarbon contrast coefficient according to any one of claims 1 to 4, characterized in that: The method also includes placing the data points on the interpretation map and dividing the interpretation map into a plurality of regions using dividing lines, wherein the divided regions include an oil layer region, a low oil production layer region, a dry layer region, and a water layer region.

6. A device for establishing an interpretation chart based on drilling time ratio and hydrocarbon contrast coefficient using the method according to any one of claims 1 to 5, characterized in that: include: First, a module is established, with the drilling time ratio as the horizontal axis and the hydrocarbon contrast coefficient as the vertical axis, to establish an interpretation chart; The second module is to acquire and record the gas logging information collected by the logging device, determine the drilling time ratio and hydrocarbon comparison coefficient of each data point, and place the data point in the interpretation map.

7. The method for establishing an interpretation chart based on drilling time ratio and hydrocarbon contrast coefficient according to claim 6, characterized in that: The second establishing module comprises: Acquisition module, which acquires and records gas measurement information collected by the logging device; The first intermediate value processing module reads the reservoir drilling time ROPs, and selects the cap layer drilling time within a set range above the reservoir to determine the corresponding cap layer drilling time ROPn; The first interpretation processing module uses the caprock drilling time ROPn and the reservoir drilling time ROPs to calculate the reservoir drilling time ratio ROPn / s. The second intermediate value processing module takes the total hydrocarbon anomaly value TGmax of the reservoir with the maximum effective value and the total hydrocarbon anomaly value of the cap rock within a set range above the reservoir to determine the base value TGmin; The second interpretation processing module calculates the hydrocarbon contrast coefficient Kc using the total hydrocarbon abnormal value TGmax and the base value TGmin; 8. The method for establishing an interpretation chart based on drilling time ratio and hydrocarbon contrast coefficient according to claim 6 or 7, characterized in that: It also includes a third establishment module, which places the data points on the interpretation map and divides the interpretation map into multiple areas using dividing lines, wherein the divided areas include oil layer areas, low-yield oil layer areas, dry layer areas, and water layer areas.

9. A storage medium, characterized in that: The storage medium stores a computer program that can be read by a computer, and the computer program is configured to execute the method for establishing an interpretation chart based on drilling time ratio and hydrocarbon contrast coefficient as described in any one of claims 1 to 5 when running.

10. An electronic device, characterized in that: The method comprises a processor and a memory, wherein a computer program is stored in the memory, and the computer program is loaded and executed by the processor to implement the method for establishing an interpretation chart based on drilling time ratio and hydrocarbon contrast coefficient as described in any one of claims 1 to 5.

Images