Oil type discrimination method and device, medium and electronic equipment

Abstract

The invention discloses an oil type discrimination method and device, a medium and electronic equipment. The method comprises the following steps: calculating a light oil identification index by acquiring the contents of various gaseous hydrocarbons in different depths in an oil field; combining the ground gas content with the light oil identification index to construct a cross plot, and fitting to obtain a light oil discrimination curve; and according to the light oil identification index and the light oil discrimination curve, calculating a fitting ground gas content, and according to the fitting ground gas content, determining oil quality types of different depths of an oil field. According to the technical scheme provided by the invention, the accuracy of judging the oil type can be improved.

Description

Technical Field

[0001] The present application belongs to the technical field of oil and gas exploration data processing, and in particular, relates to an oil type identification method, device, medium and electronic equipment. Background Art

[0002] During the development and production of some oilfield blocks, it was found that a large number of wells contained light oil. Compared with other oils, light oil has stronger volatility, lower viscosity and smaller density, resulting in a very high gas-oil ratio, and is often misjudged as a gas layer. On the logging curve, light oil may show the characteristics of both oil layers and gas layers. At the same time, it is affected by factors such as rock pore structure and physical properties. It is very difficult to identify light oil only by logging data.

[0003] Gas logging can directly measure the composition and content of gas in drilling fluid. Reservoirs with different petroleum geological backgrounds and different reservoir fluid properties have different light hydrocarbon component characteristics. In addition to the quantitative characteristics, they are also reflected in different light hydrocarbon component ratios. However, the current application of light hydrocarbon component ratio characteristics is mainly focused on identifying oil, gas and water layers, focusing on the distinction between oil and gas layers and water layers, while there is less research on the distinction between different oil qualities. Therefore, this application provides an oil quality type discrimination method to distinguish different oil qualities. Summary of the invention

[0004] The embodiments of the present application provide a method, device, medium and electronic device for distinguishing oil types, and the method can improve the accuracy of distinguishing different oil types.

[0005] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0006] According to a first aspect of an embodiment of the present application, a method for distinguishing oil quality types is provided, characterized in that the method comprises: calculating a light oil identification index by obtaining the content of various gaseous hydrocarbons at different depths in an oil field; constructing an intersection diagram by combining the ground gas content and the light oil identification index, thereby fitting a light oil discrimination curve; calculating the fitted ground gas content based on the light oil identification index and the light oil discrimination curve, and determining the oil quality types at different depths in the oil field based on the fitted ground gas content.

[0007] In some embodiments of the present application, based on the aforementioned scheme, determining the oil quality type at different depths of the oil field according to the fitted surface gas content includes: if the fitted surface gas content is less than the surface gas content, determining that the oil quality at the current depth is light oil.

[0008] In some embodiments of the present application, based on the aforementioned scheme, determining the oil quality type at different depths of the oil field according to the fitted surface gas content includes: if the fitted surface gas content is greater than the surface gas content, determining that the oil quality at the current depth is heavy oil.

[0009] In some embodiments of the present application, based on the above scheme, the light oil identification index is calculated by the following formula:

[0010]

[0011] Among them, I F is the light oil identification index, C 3 is the propane content, C 4 is the butane content, C 5 is the pentane content, a is the adjustment coefficient, ∑C=C 1 +C 2 +iC 4 +nC 4 +iC 5 +nC 5 , C 1 is the methane content, C 2 is the ethane content.

[0012] In some embodiments of the present application, based on the above scheme, the fitted ground gas content is calculated by the following formula:

[0013]

[0014] Where NTG is the fitted ground gas content, b is the fitting coefficient, I F It is an index for identifying light oil.

[0015] In some embodiments of the present application, based on the aforementioned scheme, the light oil identification index is 0-5.

[0016] In some embodiments of the present application, based on the above scheme, the ground gas content is calculated by the following formula:

[0017]

[0018] Among them, NTG is the ground gas content, TG is the total hydrocarbon value, Q is the drilling fluid outlet displacement, ROP is the drilling time, and d is the outer diameter of the drill bit.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] In order to comprehensively and relatively accurately identify the oil types at different well depths, this application introduces the concept of light oil identification index value. The light oil identification index is calculated by obtaining the content of various gaseous hydrocarbons at different depths in the oil field. After calculating the light oil identification index, the light oil identification curve is fitted based on the light oil identification index and combined with the ground gas content, so as to calculate the fitted ground gas content according to the light oil identification index and the light oil discrimination curve, and determine the oil types at different depths in the oil field according to the fitted ground gas content.

[0021] Specifically, the ground gas content is calculated by obtaining the total hydrocarbon values ​​corresponding to different well points, the drilling fluid outlet displacement, drilling time, and the outer diameter of the drill bit. Then, an intersection diagram is constructed based on the ground gas content and the light oil identification index. Based on the relationship between the light oil identification index of each well point in the intersection diagram and the ground gas content, the light oil discrimination curve is obtained.

[0022] After obtaining the light oil discrimination curve, the calculated light oil identification index can be substituted into the light oil discrimination curve to calculate the fitted surface gas content. Then, by judging the fitted surface gas content and the surface gas content, if the fitted surface gas content is less than the surface gas content, the oil quality at the current depth is determined to be light oil. If the fitted surface gas content is greater than the surface gas content, the oil quality at the current depth is determined to be heavy oil.

[0023] Based on the above method, the oil type identification method provided by the present invention can improve the accuracy of identifying different oil types.

[0024] According to the second aspect of an embodiment of the present application, an oil quality type discrimination device is provided, characterized in that the device comprises: a calculation unit, used to calculate a light oil identification index by obtaining the content of various gaseous hydrocarbons at different depths in the oil field; a construction unit, used to construct an intersection diagram by combining the ground gas content and the light oil identification index, so as to fit a light oil discrimination curve; a judgment unit, used to calculate the fitted ground gas content according to the light oil identification index and the light oil discrimination curve, and determine the oil quality type at different depths of the oil field according to the fitted ground gas content.

[0025] According to a third aspect of an embodiment of the present application, a computer-readable storage medium is provided, characterized in that at least one program code is stored in the computer-readable storage medium, and the at least one program code is loaded and executed by a processor to implement the operations performed by the described method.

[0026] According to a fourth aspect of an embodiment of the present application, an electronic device is provided, characterized in that the electronic device includes one or more processors and one or more memories, at least one program code is stored in the one or more memories, and the at least one program code is loaded and executed by the one or more processors to implement the operations performed by the method.

[0027] The beneficial effects of each embodiment of the second to fourth aspects mentioned above can refer to the beneficial effects of the first aspect and each embodiment of the first aspect mentioned above, and will not be repeated here.

[0028] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0030] Figure 1 A flow chart showing a method for distinguishing oil quality types in an embodiment of the present application is shown;

[0031] Figure 2 A schematic diagram of well logging data in an embodiment of the present application is shown;

[0032] Figure 3 The intersection diagram in the embodiment of the present application is shown;

[0033] Figure 4 The light oil identification result diagram in the embodiment of the present application is shown;

[0034] Figure 5 A schematic diagram showing the structure of an oil type discrimination device in an embodiment of the present application is shown;

[0035] Figure 6 A schematic diagram of the structure of an electronic device in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0038] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0039] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0040] The following is a detailed description of this application:

[0041] Figure 1 The flowchart of the oil quality type identification method in the embodiment of the present application is shown. The oil quality type identification method can be executed by a device with a computing and processing function, such as an oil quality type identification device. Figure 1 As shown, the oil type identification method at least includes steps 110 to 130, which are described in detail as follows:

[0042] Step 110, calculating the light oil identification index by obtaining the contents of various gaseous hydrocarbons at different depths in the oil field.

[0043] Step 120, combining the surface gas content and the light oil identification index to construct an intersection diagram, thereby fitting a light oil discrimination curve.

[0044] Step 130, calculating the fitted surface gas content according to the light oil identification index and the light oil discrimination curve, and determining the oil quality types at different depths of the oil field according to the fitted surface gas content.

[0045] In this application, in order to comprehensively and accurately identify the oil types at different well depths, it is necessary to introduce the concept of light oil identification index value. Figure 2, shows a schematic diagram of the logging data in the embodiment of the present application. Through the schematic diagram of the logging data, the content of various gaseous hydrocarbons at different depths in the oil field is obtained to calculate the light oil identification index.

[0046] After calculating the light oil identification index, the type of oil can be distinguished based on the light oil identification index. The light oil identification index is 0-5, and the light oil identification index corresponding to light oil is generally between 0 and 1, while the light oil identification index corresponding to heavy oil is generally greater than 1, and the light oil identification index corresponding to heavy oil increases with the lightness or heaviness of the oil, gradually changing from 1 to 5.

[0047] In addition, in the present application, in order to improve the accuracy of oil quality identification, after calculating the light oil identification index, the oil type is not differentiated. Instead, the light oil identification index is used as the basis, and combined with the ground gas content, a light oil discrimination curve is fitted, and then the fitted ground gas content is calculated based on the light oil identification index and the light oil discrimination curve, and the oil type at different depths is determined based on the fitted ground gas content.

[0048] For details, please refer to Figure 2 , obtain the total hydrocarbon values ​​corresponding to different well points, the drilling fluid outlet displacement, the drill bit outer diameter, to calculate the ground gas content, and then build an intersection diagram based on the ground gas content and the light oil identification index, and obtain the light oil discrimination curve based on the relationship between the light oil identification index of each well point in the intersection diagram and the ground gas content. Figure 3 , shows the intersection diagram in the embodiment of the present application. Among them, the correlation degree of the light oil discrimination curve in the intersection diagram is 1.

[0049] After obtaining the light oil discrimination curve, the calculated light oil identification index can be substituted into the light oil discrimination curve to calculate the fitted surface gas content. Then, by judging the fitted surface gas content and the surface gas content, if the fitted surface gas content is less than the surface gas content, it is determined that the oil quality at the current depth is light oil. If the fitted surface gas content is greater than the surface gas content, it is determined that the oil quality at the current depth is heavy oil.

[0050] Furthermore, the light oil identification index is calculated by the following formula:

[0051]

[0052] Among them, I F is the light oil identification index, C 3 is the propane content, C 4 is the butane content, C 5 is the pentane content, a is the adjustment coefficient, ∑C=C 1 +C2 +iC 4 +nC 4 +iC 5 +nC 5 , C 1 is the methane content, C 2 is the ethane content.

[0053] Furthermore, the ground gas content is calculated by the following formula:

[0054]

[0055] Among them, NTG is the surface gas content, TG is the total hydrocarbon value, Q is the drilling fluid outlet displacement, ROP is the drilling time, and d is the outer diameter of the drill bit.

[0056] Furthermore, the fitted ground gas content is calculated by the following formula:

[0057]

[0058] Where NTG is the fitted ground gas content, b is the fitting coefficient, I F It is an index for identifying light oil.

[0059] In order to fully illustrate that the oil type identification method in this application can improve the accuracy of oil type identification, refer to Figure 4 , showing the light oil identification results in the embodiment of the present application.

[0060] exist Figure 4 Through the oil quality type identification method in this application, it is determined that the first section of the well (2195m-2199m) is a light oil area, the second section of the well (2223m-2226m) is a light oil area, and the third section of the well (2232m-2235m) is a heavy oil area.

[0061] Then, actual measurements and judgments were made on the first well section, the second well section, and the third well section. After actual measurements, it was determined that the gas density in the first well section was 0.64, and the neutron density had an obvious mining effect, so the first well section was a light oil area; the crude oil API in the second well section was determined to be 33.2, the neutron density was relatively intersecting, and the mining effect was slight, so the second well section was a light oil area; the crude oil API in the third well section was determined to be 19.1, and there was no mining effect, so the third well section was a heavy oil area.

[0062] In summary, the above process can be explained that the oil type identification method in the present application can accurately identify the type of oil, thereby improving the accuracy of identifying the oil type and improving the efficiency of identifying the oil type.

[0063] Based on the same inventive concept, the present application also provides an oil type identification device, referring to Figure 5 , showing a schematic diagram of the structure of the oil quality type discrimination device in the embodiment of the present application. The oil quality type discrimination device 500 comprises: an oil quality type discrimination device, characterized in that the device comprises: a calculation unit 501, used to calculate the light oil identification index by obtaining the content of various gaseous hydrocarbons at different depths in the oil field; a construction unit 502, used to combine the ground gas content and the light oil identification index to construct an intersection diagram, so as to fit the light oil discrimination curve; a judgment unit 503, used to calculate the fitted ground gas content according to the light oil identification index and the light oil discrimination curve, and determine the oil quality type at different depths of the oil field according to the fitted ground gas content.

[0064] For details not disclosed in the embodiments of the device of the present application, please refer to the embodiments of the above method of the present application.

[0065] Based on the same inventive concept, the present application may also provide a computer-readable storage medium, characterized in that at least one program code is stored in the computer-readable storage medium, and the at least one program code is loaded and executed by a processor to implement the operations performed by the method described.

[0066] Based on the same inventive concept, the present application also provides an electronic device, referring to Figure 6 , Figure 6 A schematic diagram of the structure of an electronic device in an embodiment of the present application is shown.

[0067] The electronic device includes one or more memories 604, one or more processors 602, and at least one computer program (program code) stored in the memory 604 and executable on the processor 602. When the processor 602 executes the computer program, the method described above is implemented.

[0068] Among them, Figure 6In the embodiment of the present invention, a bus architecture (represented by bus 600) is shown, which may include any number of interconnected buses and bridges, and bus 600 links various circuits including one or more processors represented by processor 602 and memory represented by memory 604. Bus 600 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 605 provides an interface between bus 600 and receiver 601 and transmitter 603. Receiver 601 and transmitter 603 may be the same element, namely a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 602 is responsible for managing bus 600 and general processing, while memory 604 may be used to store data used by processor 602 when performing operations.

[0069] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on a computer-readable medium or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. In addition, each functional unit may be integrated into a processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit.

[0070] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0071] The units described as separate components may or may not be physically separated, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed in multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0072] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0073] The above description is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A method for distinguishing oil types, characterized in that: The method comprises: By obtaining the contents of various gaseous hydrocarbons at different depths in the oil field, the light oil identification index is calculated; Combining the surface gas content with the light oil identification index, constructing an intersection diagram, thereby fitting a light oil discrimination curve; The fitted surface gas content is calculated according to the light oil identification index and the light oil discrimination curve, and the oil quality types at different depths of the oil field are determined according to the fitted surface gas content.

2. The method according to claim 1, characterized in that Determining the oil quality types at different depths of the oil field according to the fitted ground gas content includes: If the fitted surface gas content is less than the surface gas content, it is determined that the oil quality at the current depth is light oil.

3. The method according to claim 1, characterized in that Determining the oil quality types at different depths of the oil field according to the fitted ground gas content includes: If the fitted surface gas content is greater than the surface gas content, it is determined that the oil quality at the current depth is heavy oil.

4. The method according to claim 1, characterized in that: The light oil identification index is calculated by the following formula: Among them, I F is the light oil identification index, C3 is the propane content, C4 is the butane content, C5 is the pentane content, a is the adjustment coefficient, ∑C=C1+C2+iC4+nC4+iC5+nC5, C1 is the methane content, C2 is the ethane content.

5. The method according to claim 1, characterized in that The fitted ground gas content is calculated by the following formula: Where NTG is the fitted ground gas content, b is the fitting coefficient, I F It is an index for identifying light oil.

6. The method according to claim 1, characterized in that The light oil identification index is 0-5.

7. The method according to claim 1, characterized in that The ground gas content is calculated by the following formula: Among them, NTG is the surface gas content, TG is the total hydrocarbon value, Q is the drilling fluid outlet displacement, ROP is the drilling time, and d is the outer diameter of the drill bit.

8. An oil type identification device, characterized in that: The device comprises: A calculation unit, used for calculating a light oil identification index by obtaining the contents of various gaseous hydrocarbons at different depths in the oil field; A construction unit is used to combine the surface gas content and the light oil identification index to construct an intersection diagram, thereby fitting and obtaining a light oil discrimination curve; The judgment unit is used to calculate the fitted surface gas content according to the light oil identification index and the light oil discrimination curve, and determine the oil quality type at different depths of the oil field according to the fitted surface gas content.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores at least one program code, and the at least one program code is loaded and executed by a processor to implement the operations performed by the method according to any one of claims 1 to 7.

10. An electronic device, characterized in that: The electronic device includes one or more processors and one or more memories, wherein the one or more memories store at least one program code, and the at least one program code is loaded and executed by the one or more processors to implement the operations performed by the method according to any one of claims 1 to 7.

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