Method, device and system for determining yield of shale oil fractured well in blowout period

Abstract

The invention relates to the technical field of yield prediction, in particular to a shale oil fractured well blowout period yield determination method, device and system, the shale oil fractured well blowout period yield determination method comprises the following steps: determining the required single well daily oil production according to the single well productivity profile of a shale oil fractured well; according to the single-well water content of the shale oil fractured well and the needed single-well daily oil production, the single-well daily fluid production is obtained; obtaining the diameter of the oil nozzle based on the single-well daily fluid production capacity and the production parameters; and determining the single-well blowout period yield of the shale oil fractured well based on the diameter of the oil nozzle. According to the method, the function relation between the shale oil fractured well flowing period liquid production capacity and the production parameters is obtained through fitting of the control variables, the oil nozzle diameter is obtained through the function relation, then the shale oil fractured well single well flowing period yield is obtained, the calculation process is simple, precision is high, the requirement for workers is low, universal adaptability is achieved, and the method is suitable for popularization and application. And guidance is provided for fine management and adjustment in the self-spraying period.

Description

Technical Field

[0001] The present invention relates to the technical field of production prediction, in particular to a method, a device and a system for determining the production of a shale oil fracturing well during the self-flowing period. Background Art

[0002] "Horizontal well + volume fracturing" has become the main development method for unconventional shale oil reservoirs. Horizontal wells with different geological conditions, horizontal section lengths, high-quality reservoir drilling rates, and fracturing scales have different design capacities and different daily production requirements. At present, the main method for controlling the production of oil wells during the self-flowing period is to control the size of the wellhead nozzle. However, the actual situation on site is that the same nozzle has different daily liquid production in different oil wells. Therefore, it is very important to determine the size of the nozzle to control the production of shale oil fracturing wells during the self-flowing period. At present, there is no standardized and automatic analysis method for determining the nozzle. Summary of the invention

[0003] The present invention provides a method, device and system for determining the production of a shale oil fracturing well during the blowing period, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problem that the existing method for determining the production of a shale oil fracturing well during the blowing period cannot effectively determine the size of the oil nozzle, and thus cannot accurately determine the production during the blowing period.

[0004] One of the technical solutions of the present invention is achieved by the following measures: A method for determining the production of a shale oil fracturing well during the self-flowing period, comprising:

[0005] Determine the required daily oil production per well based on the single well productivity profile of shale oil fracturing wells;

[0006] According to the water content of the shale oil fracturing well and the required daily oil production of the well, the daily liquid production of the well is obtained;

[0007] The nozzle diameter is obtained based on the daily liquid production of a single well and production parameters, wherein the production parameters include the wellhead oil pressure and gas-oil ratio of the single well;

[0008]

[0009] Among them, Q is the daily liquid production of a single well; P is the wellhead oil pressure; d is the nozzle diameter; GOR is the gas-oil ratio;

[0010] Determine the production of a single shale oil fracturing well during the flowing period based on the nozzle diameter.

[0011] The following are further optimizations and / or improvements to the above technical solutions:

[0012] According to the water content of the shale oil fracturing well and the required daily oil production of the well, the daily liquid production of the well is obtained;

[0013] C=Q×(1-W)

[0014] Among them, C is the daily oil production of a single well; Q is the daily liquid production of a single well; and W is the water content of a single well.

[0015] Based on the daily fluid production and production parameters of a single well, the nozzle diameter is obtained, including:

[0016] Based on the functional relationship between the liquid production during the self-flowing period of shale oil fracturing wells and production parameters, the functional relationship of the daily liquid production of a single well is obtained by fitting, where the production parameters include the wellhead oil pressure, gas-oil ratio, and nozzle diameter of the single well;

[0017]

[0018] Among them, Q is the daily liquid production of a single well; P is the wellhead oil pressure; d is the nozzle diameter; GOR is the gas-oil ratio;

[0019] Obtaining production parameters of the shale oil fracturing well to be determined, wherein the production parameters include wellhead oil pressure and gas-oil ratio of a single well;

[0020] The nozzle diameter is obtained by using the functional relationship of the daily liquid production of a single well and based on the daily liquid production of a single well and production parameters.

[0021] The second technical solution of the present invention is achieved by the following measures: a device for determining the output of a shale oil fracturing well during the self-flowing period, comprising:

[0022] A first data acquisition unit determines the required daily oil production of a single well according to the single well production profile of the shale oil fracturing well;

[0023] The second data acquisition unit obtains the daily liquid production of the single well according to the water content of the single well of the shale oil fracturing well and the required daily oil production of the single well;

[0024] A nozzle diameter determination unit obtains the nozzle diameter based on the daily liquid production of a single well and production parameters, wherein the production parameters include the wellhead oil pressure and gas-oil ratio of the single well;

[0025]

[0026] Among them, Q is the daily liquid production of a single well; P is the wellhead oil pressure; d is the nozzle diameter; GOR is the gas-oil ratio;

[0027] The production conversion unit determines the production of a single shale oil fracturing well during the self-flowing period based on the nozzle diameter.

[0028] The third technical solution of the present invention is achieved by the following measures: a system for determining the production of a shale oil fracturing well during the self-flowing period, comprising:

[0029] Device for determining the production of shale oil fracturing wells during the flowing period;

[0030] An interactive device is used for an operator to communicate with a shale oil fracturing well self-flowing period production determination device, so that the operator enters required data for the shale oil fracturing well self-flowing period production determination device through an interactive unit.

[0031] The fourth technical solution of the present invention is achieved through the following measures: a storage medium, on which is stored a computer program that can be read by a computer, and the computer program is configured to execute a method for determining the production of a shale oil fracturing well during the spontaneous flow period when it is run.

[0032] The fifth technical solution of the present invention is achieved through the following measures: 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 determining the production of a shale oil fracturing well during the spontaneous flow period.

[0033] The present invention obtains the functional relationship between the liquid production of a shale oil fracturing well during the flowing period and the production parameters by fitting the control variables, and uses the functional relationship to obtain the nozzle diameter, and then obtains the production of a single shale oil fracturing well during the flowing period. The calculation process is simple and accurate, and the requirements for staff are low. It has universal adaptability, provides guidance for the refined management and adjustment of the flowing period, more fully maintains the formation energy, improves the compliance rate of the production capacity profile, and improves the oil production rate and the full-cycle EUR. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Attached Figure 1 It is a schematic diagram of the method flow of the present invention.

[0035] Attached Figure 2 This is a graph showing the relationship between the daily fluid output of a 4.0mm nozzle and the oil pressure.

[0036] Attached Figure 3 This is a graph showing the relationship between different oil nozzles, daily fluid output, and oil pressure.

[0037] Attached Figure 4 This is a graph showing the daily fluid production changes at different gas-to-oil ratios under a 3.5mm oil nozzle and 10MPa pressure.

[0038] Attached Figure 5 This is the production data diagram of the JXXX_H well in Example 2 of the present invention.

[0039] Attached Figure 6 This is the production data diagram of the MHWX well in Example 3 of the present invention.

[0040] Attached Figure 7 It is a schematic diagram of the device structure of the present invention.

[0041] Attached Figure 8 It is a schematic diagram of the system structure of the present invention. DETAILED DESCRIPTION

[0042] 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.

[0043] The present invention will be further described below in conjunction with embodiments and drawings:

[0044] Embodiment 1: As attached Figure 1 As shown, the embodiment of the present invention discloses a method for determining the production of a shale oil fracturing well during the flowing period, comprising:

[0045] Step S110, determining the required daily oil production of a single well according to the single well production profile of the shale oil fracturing well;

[0046] In this step, the required daily oil production of a single well is determined based on the single well productivity profile of the shale oil fracturing well, which is the planned daily oil production of the single well obtained by combining economic benefits and production benefits. The single well productivity profile of the shale oil fracturing well can be obtained by testing existing single wells in the same area through existing productivity profile testers.

[0047] Step S120, obtaining the daily liquid production of a single well according to the water content of the single well of the shale oil fracturing well and the required daily oil production of the single well;

[0048] In this step, the daily liquid production of a single well is obtained by the following formula:

[0049] C=Q×(1-W)

[0050] Where C is the daily oil production of a single well, unit: m 3 ; Q is the daily fluid production of a single well, unit: m 3 ; W is the water content of a single well, unit: %.

[0051] The water content of the above-mentioned single well can be determined by testing the wellhead produced fluid.

[0052] Step S130, obtaining the nozzle diameter based on the daily liquid production of the single well and the production parameters, wherein the production parameters include the wellhead oil pressure and gas-oil ratio of the single well;

[0053]

[0054] Where Q is the daily fluid production of a single well, in m 3 ; P is the wellhead oil pressure, unit MPa; d is the nozzle diameter, unit mm; GOR is the gas-oil ratio, unit m 3 / m 3 ;

[0055] This step specifically includes:

[0056] (1) Based on the functional relationship between the liquid production during the self-flowing period of shale oil fracturing wells and production parameters, the functional relationship of the daily liquid production of a single well is obtained by fitting, where the production parameters include the wellhead oil pressure, gas-oil ratio, and nozzle diameter of the single well;

[0057]

[0058] Where Q is the daily fluid production of a single well, in m 3 ; P is the wellhead oil pressure, unit MPa; d is the nozzle diameter, unit mm; GOR is the gas-oil ratio, unit m 3 / m 3 ;

[0059] Based on the functional relationship between the liquid production during the self-flowing period of shale oil fracturing wells and production parameters, the functional relationship of the daily liquid production of a single well is obtained by fitting, which specifically includes:

[0060] (a) By controlling the two parameters of gas-oil ratio and nozzle diameter, the oil pressure and daily liquid production were fitted and analyzed, and it was found that the liquid production of shale oil fracturing wells during the self-flowing period and the wellhead pressure were in a power function relationship rather than a linear relationship (for example, as shown in the attached figure). Figure 2 As shown), Q = 12.055P 0.632 , where Q is the daily fluid production of a single well, in m 3 ; P is the wellhead oil pressure, unit: MPa;

[0061] (b) By controlling the wellhead oil pressure and gas-oil ratio, the nozzle diameter and daily liquid production were fitted and analyzed, and it was found that the liquid production of shale oil fracturing wells during the self-flowing period and the nozzle diameter are in a 1.89-power relationship (for example, as shown in the attached figure Figure 3 As shown), Q = 0.125d 1.89 , where Q is the daily fluid production of a single well, in m 3 ; d is the nozzle diameter, unit: mm;

[0062] (c) By controlling the wellhead oil pressure and nozzle diameter, the gas-oil ratio and daily liquid production were fitted and analyzed, and it was found that the liquid production of shale oil fracturing wells during the self-flowing period and the gas-oil ratio were in a 0.2 power relationship (for example, as shown in the attached figure). Figure 4 shown), Where Q is the daily fluid production of a single well, in m 3 ; GOR is gas-oil ratio, unit: m 3 / m 3 ;

[0063] (d) Based on the above fitting relationship, the following single well daily liquid production function relationship is established:

[0064]

[0065] Among them, Q is the daily liquid production of a single well; P is the wellhead oil pressure; d is the nozzle diameter; GOR is the gas-oil ratio;

[0066] (2) obtaining production parameters of the shale oil fracturing well to be determined, wherein the production parameters include wellhead oil pressure and gas-oil ratio of a single well;

[0067] (3) The nozzle diameter is obtained by using the functional relationship of the daily liquid production of a single well and based on the daily liquid production of a single well and production parameters.

[0068] Step S140, determining the production of a single shale oil fracturing well during the self-flowing period based on the nozzle diameter.

[0069] This step can be to match the calculated nozzle diameter with the existing corresponding relationship between the single well spontaneous flow period production and the nozzle diameter to obtain the single well spontaneous flow period production of the corresponding shale oil fracturing well.

[0070] The present invention discloses a method for determining the production of a shale oil fracturing well during the blowing period. The functional relationship between the liquid production of the shale oil fracturing well during the blowing period and the production parameters is obtained by fitting the control variables. The nozzle diameter is obtained by using the functional relationship, and then the production of a single shale oil fracturing well during the blowing period is obtained. The calculation process is simple and has high precision, and the requirements for staff are low. It has universal adaptability, provides guidance for refined management and adjustment during the blowing period, more fully maintains the formation energy, improves the conformity rate of the production capacity profile, and improves the oil production speed and the full-cycle EUR.

[0071] Example 2: Taking the JXXX_H well in the Jimusar block as an example, the well has a cumulative production of 642 days, a gas-oil ratio of 11, and uses 2.0-2.5-3.0-3.5mm nozzles for production, and the oil pressure drops from 29.5MPa to 3.3MPa. The method disclosed in the present invention is used to determine the predicted value of the well's self-flowing period production. Figure 5 The blue circle represents the predicted production and the solid blue represents the actual production. It can be seen from the figure that the predicted value corresponds well to the actual value. The predicted value only differs from the actual value during the maintenance phase, and the overall error value is less than 3%, which is within a reasonable range.

[0072] Example 3: Taking the MHWXXX_H well in the Mahu shale oil block as an example, the well has a cumulative production of 570 days, a gas-oil ratio of 15, and uses 2.0-2.5-3.0-3.5-4.0-4.5-5.0 mm nozzles for production, and the oil pressure drops from 34.5 MPa to 0.5 MPa. The method disclosed in the present invention is used to determine the predicted value of the well's self-flowing period production. Figure 6 The production data of the well, where the blue circle represents the predicted production and the blue solid represents the actual production. From the figure, it can be seen that the predicted value corresponds well to the actual value of the full self-flowing cycle, and only differs from the actual value during the maintenance stage. The overall error value is less than 3%, which is within a reasonable range.

[0073] Embodiment 4: As attached Figure 7 As shown, this embodiment discloses a device for determining the production of a shale oil fracturing well during the flowing period, comprising:

[0074] A first data acquisition unit determines the required daily oil production of a single well according to the single well production profile of the shale oil fracturing well;

[0075] The second data acquisition unit obtains the daily liquid production of the single well according to the water content of the single well of the shale oil fracturing well and the required daily oil production of the single well;

[0076] A nozzle diameter determination unit obtains the nozzle diameter based on the daily liquid production of a single well and production parameters, wherein the production parameters include the wellhead oil pressure and gas-oil ratio of the single well;

[0077]

[0078] Among them, Q is the daily liquid production of a single well; P is the wellhead oil pressure; d is the nozzle diameter; GOR is the gas-oil ratio;

[0079] The production conversion unit determines the production of a single shale oil fracturing well during the self-flowing period based on the nozzle diameter.

[0080] Embodiment 5: As attached Figure 8 As shown, this embodiment discloses a system for determining the production of a shale oil fracturing well during the flowing period, comprising:

[0081] The device for determining the production of a shale oil fracturing well during the blowing period, wherein the device for determining the production of a shale oil fracturing well during the blowing period is the device for determining the production of a shale oil fracturing well during the blowing period as claimed in claim 4;

[0082] An interactive device is used for an operator to communicate with a shale oil fracturing well self-flowing period production determination device, so that the operator enters required data for the shale oil fracturing well self-flowing period production determination device through an interactive unit.

[0083] The above-mentioned interactive device can be a terminal device, a computer, etc.

[0084] Embodiment 6: The embodiment of the present invention discloses a storage medium, on which a computer program that can be read by a computer is stored, and the computer program is configured to execute a method for determining the production of a shale oil fracturing well during the spontaneous flow period when it is run.

[0085] 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.

[0086] Embodiment 7: 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 determining the production of a shale oil fracturing well during the spontaneous flow period.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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 1A function specified in one or more boxes.

[0091] 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 determining the production of a shale oil fracturing well during the flowing period, characterized in that: include: Determine the required daily oil production per well based on the single well productivity profile of shale oil fracturing wells; According to the water content of the shale oil fracturing well and the required daily oil production of the well, the daily liquid production of the well is obtained; The nozzle diameter is obtained based on the daily liquid production of a single well and production parameters, wherein the production parameters include the wellhead oil pressure and gas-oil ratio of the single well; Among them, Q is the daily liquid production of a single well; P is the wellhead oil pressure; d is the nozzle diameter; GOR is the gas-oil ratio; Determine the production of a single shale oil fracturing well during the flowing period based on the nozzle diameter.

2. The method for determining the production of shale oil fracturing wells during the flowing period according to claim 1, characterized in that: The daily liquid production of a single well is obtained according to the water content of a single well of a shale oil fracturing well and the required daily oil production of a single well through the following formula; C=Q×(1-W) Among them, C is the daily oil production of a single well; Q is the daily liquid production of a single well; and W is the water content of a single well.

3. The method for determining the production of shale oil fracturing wells during the flowing period according to claim 1 or 2, characterized in that: Based on the daily fluid production and production parameters of a single well, the nozzle diameter is obtained, including: Based on the functional relationship between the liquid production during the self-flowing period of shale oil fracturing wells and production parameters, the functional relationship of the daily liquid production of a single well is obtained by fitting, where the production parameters include the wellhead oil pressure, gas-oil ratio, and nozzle diameter of the single well; Among them, Q is the daily liquid production of a single well; P is the wellhead oil pressure; d is the nozzle diameter; GOR is the gas-oil ratio; Obtaining production parameters of the shale oil fracturing well to be determined, wherein the production parameters include wellhead oil pressure and gas-oil ratio of a single well; The nozzle diameter is obtained by using the functional relationship of the daily liquid production of a single well and based on the daily liquid production of a single well and production parameters.

4. A device for determining the production of a shale oil fracturing well during the blowing period, wherein the device for determining the production of a shale oil fracturing well during the blowing period uses the method for determining the production of a shale oil fracturing well during the blowing period as claimed in any one of claims 1 to 3, characterized in that: include: A first data acquisition unit determines the required daily oil production of a single well according to the single well production profile of the shale oil fracturing well; The second data acquisition unit obtains the daily liquid production of the single well according to the water content of the single well of the shale oil fracturing well and the required daily oil production of the single well; A nozzle diameter determination unit obtains the nozzle diameter based on the daily liquid production of a single well and production parameters, wherein the production parameters include the wellhead oil pressure and gas-oil ratio of the single well; Among them, Q is the daily liquid production of a single well; P is the wellhead oil pressure; d is the nozzle diameter; GOR is the gas-oil ratio; The production conversion unit determines the production of a single shale oil fracturing well during the self-flowing period based on the nozzle diameter.

5. A system for determining the production of shale oil fracturing wells during the flowing period, characterized in that: include: The device for determining the production of a shale oil fracturing well during the blowing period, wherein the device for determining the production of a shale oil fracturing well during the blowing period is the device for determining the production of a shale oil fracturing well during the blowing period as claimed in claim 4; An interactive device is used for an operator to communicate with a shale oil fracturing well self-flowing period production determination device, so that the operator enters required data for the shale oil fracturing well self-flowing period production determination device through an interactive unit.

6. 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 determining the production of a shale oil fracturing well during the flowing period as described in any one of claims 1 to 3 when running.

7. 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 determining the production of a shale oil fracturing well during the flowing period as claimed in any one of claims 1 to 3.

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