Unconventional gas well yield optimization method and device based on wellbore sand carrying rate

Abstract

The invention relates to the technical field of unconventional gas well yield optimization, and provides an unconventional gas well yield optimization method and device based on a wellbore sand carrying rate, and the method comprises the steps: recognizing whether a target gas well is in a stable production state or not; when the target gas well is in the stable production state, the sand carrying rate of the target gas well is obtained; judging whether gas well yield optimization needs to be carried out on the target gas well or not according to the sand carrying rate and the actually measured sand yield; when the gas well yield of the target gas well needs to be optimized, the valve opening degree of the target gas well is adjusted and controlled, and the sand carrying rate of the target gas well is obtained again till the current sand carrying rate of the target gas well reaches a preset value. According to the embodiment of the invention, the yield of the unconventional gas well can be accurately optimized based on the wellbore sand-carrying rate.

Description

Technical Field

[0001] This specification relates to the field of unconventional gas well production optimization technology, and in particular to an unconventional gas well production optimization method and device based on wellbore sand carrying rate. Background Technology

[0002] Unconventional natural gas refers to natural gas resources extracted through unconventional methods, mainly including shale gas, coalbed methane, and tight gas. These exist in different rock formations, making extraction difficult and relatively complex. They generally require large-scale hydraulic fracturing to achieve production, resulting in high research and development costs. However, with the continuous increase in natural gas demand, the importance of unconventional natural gas is becoming increasingly prominent. Due to various reasons, unconventional gas wells produce formation sand and fracturing sand after large-scale sand injection and fracturing. If the wellbore cannot properly carry the sand, two main problems will arise:

[0003] (1) If the amount of sand carried by the well is small, the sand particles will gradually settle at the bottom of the well, gradually causing blockage or even complete blockage of the production layer or well, affecting gas well production.

[0004] (2) If the wellbore carries a large amount of sand, it may cause sand particles to erode the wellbore, surface equipment, etc., and cause perforation or damage to casing, tubing, oil pipeline, etc., affecting normal production.

[0005] Therefore, accurately predicting and controlling the sand-carrying ratio of unconventional gas wells is of great significance for preventing sand blockage and damage to gas production equipment, maintaining normal production of unconventional gas wells, and increasing unconventional gas well production. However, there is currently a lack of technical solutions that can accurately optimize the production of unconventional gas wells based on the sand-carrying ratio of the wellbore. Summary of the Invention

[0006] The purpose of the embodiments in this specification is to provide a method and apparatus for optimizing the production of unconventional gas wells based on the sand carrying rate of the wellbore, so as to achieve accurate optimization of the production of unconventional gas wells based on the sand carrying rate of the wellbore.

[0007] To achieve the above objectives, this specification provides, in one aspect, an unconventional gas well production optimization method based on wellbore sand carrying capacity, comprising:

[0008] Identify whether the target gas well is in a stable production state;

[0009] When the target gas well is in a stable production state, the sand carrying capacity of the target gas well is obtained;

[0010] Based on the sand carrying rate and the measured sand output, determine whether it is necessary to optimize the gas well production of the target gas well.

[0011] When it is necessary to optimize the gas production of the target gas well, the valve opening of the target gas well is adjusted and the sand carrying rate of the target gas well is reacquired until the current sand carrying rate of the target gas well reaches the preset value.

[0012] In the unconventional gas well production optimization method based on wellbore sand carrying rate in the embodiments of this specification, the step of identifying whether the target gas well is in a stable production state includes:

[0013] The wellhead pressure, wellhead temperature, gas production, water production, and sand production of the target gas well were collected.

[0014] Determine whether the wellhead pressure, wellhead temperature, gas production, water production, and sand production of the target gas well are all within the corresponding target range;

[0015] When the wellhead pressure, wellhead temperature, gas production, water production, and sand production of the target gas well are all within the corresponding target range, the target gas well is confirmed to be in a stable production state.

[0016] In the unconventional gas well production optimization method based on wellbore sand carrying rate in the embodiments of this specification, the step of determining whether the wellhead pressure, wellhead temperature, gas production, water production, and sand production of the target gas well are all within the corresponding target range includes:

[0017] Determine whether the wellhead pressure of the target gas well meets the requirements.

[0018] Determine whether the wellhead temperature of the target gas well meets the requirements.

[0019] Determine whether the gas production of the target gas well meets the requirements.

[0020] Determine whether the water production of the target gas well meets the requirements.

[0021] Determine whether the sand production rate of the target gas well meets the requirements.

[0022] Among them, P x Let P be the wellhead pressure collected at time point x, a be the sampling period, and P be the wellhead pressure. i Let b be the wellhead pressure collected at time point xa, and let b be the data point within the sampling period. x Let T be the wellhead temperature collected at time point x. i Let Q be the temperature at the i-th wellhead collected at time point xa. Gx Let Q be the amount of gas produced at time point x. Gi Let Q be the gas production rate collected at time point xa for the i-th time. Lx Let Q be the amount of water produced collected at time point x.Li Let Q be the water production rate collected at time point xa for the i-th time. Sx Let Q be the amount of sand produced at time point x. Si Let be the i-th sand output collected at time point xa.

[0023] In the unconventional gas well production optimization method based on wellbore sand carrying rate in the embodiments of this specification, obtaining the sand carrying rate of the target gas well includes:

[0024] According to the formula Calculate the sand carrying capacity of the target gas well;

[0025] Where η is the sand-carrying ratio of the target gas well, Re G Let α be the gas phase Reynolds number of the target gas well, and α be the Reynolds number. G The coefficient, Re L Let β be the liquid phase Reynolds number of the target gas well, and β be the Reynolds number. L The coefficient, γ, is a preset constant. The true liquid phase density of the target gas well. The true gas phase density of the target gas well.

[0026] In the unconventional gas well production optimization method based on wellbore sand carrying rate in the embodiments of this specification, the step of determining whether gas well production optimization of the target gas well is needed based on the sand carrying rate and the measured sand production includes:

[0027] When the sand carrying rate of the target gas well is 0≤η<1 and the sand production of the target gas well remains zero, there is no need to optimize the gas well production of the target gas well.

[0028] When the sand carrying rate of the target gas well is 0≤η<1, and the sand production of the target gas well shows an increasing trend from zero to non-zero, the gas well production of the target gas well needs to be optimized.

[0029] When the sand carrying rate η of the target gas well is ≥ 0 and the sand production of the target gas well is not zero, the gas well production of the target gas well needs to be optimized.

[0030] When the sand carrying rate η of the target gas well is ≥ 0 and the sand production of the target gas well remains zero, there is no need to optimize the gas well production of the target gas well.

[0031] In the unconventional gas well production optimization method based on wellbore sand carrying rate in the embodiments of this specification, the adjustment and control of the valve opening of the target gas well includes:

[0032] The valve opening of the target gas well is controlled according to a preset valve increment step adjustment.

[0033] On the other hand, the embodiments of this specification also provide an unconventional gas well production optimization device based on wellbore sand carrying rate, including:

[0034] The identification module is used to identify whether the target gas well is in a stable production state;

[0035] The acquisition module is used to acquire the sand carrying rate of the target gas well when the target gas well is in a stable production state.

[0036] The confirmation module is used to determine whether the gas well production of the target gas well needs to be optimized based on the sand carrying rate and the measured sand output.

[0037] The adjustment module is used to adjust and control the valve opening of the target gas well and re-acquire the sand carrying rate of the target gas well when it is necessary to optimize the gas well production of the target gas well, until the current sand carrying rate of the target gas well reaches a preset value.

[0038] On the other hand, embodiments of this specification also provide a computer device, including a memory, a processor, and a computer program stored in the memory, wherein the computer program, when run by the processor, executes instructions for the above-described method.

[0039] On the other hand, embodiments of this specification also provide a computer storage medium storing a computer program thereon, which, when run by the processor of a computer device, executes instructions for the above-described method.

[0040] On the other hand, embodiments of this specification also provide a computer program product, which includes a computer program that, when run by the processor of a computer device, executes instructions for the above-described method.

[0041] As can be seen from the technical solutions provided in the embodiments of this specification above, in the gas well production process, when it is confirmed that the target gas well is in a stable production state, the sand carrying rate of the target gas well is obtained. Based on the obtained sand carrying rate and the measured sand production, it is determined whether the gas well production of the target gas well needs to be optimized. When the gas well production of the target gas well needs to be optimized, the valve opening of the target gas well is adjusted and the sand carrying rate of the target gas well is obtained again until the current sand carrying rate of the target gas well reaches the preset value. In this way, by using the sand carrying rate under the stable production state to optimize the gas well production of the target gas well, the problem that the sand carrying rate under the unstable state cannot truly reflect the sand carrying situation of the gas well and thus affects the accuracy of gas well production optimization can be reduced or avoided. This achieves accurate optimization of unconventional gas well production based on the wellbore sand carrying rate. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0043] Figure 1 This specification illustrates schematic diagrams of unconventional gas well production optimization application environments based on wellbore sand carrying capacity in some embodiments of this specification;

[0044] Figure 2 Flowcharts of methods for optimizing unconventional gas well production based on wellbore sand carrying capacity in some embodiments of this specification are shown;

[0045] Figure 3 It shows Figure 2 The flowchart shown illustrates the method for identifying whether a target gas well is in a stable production state.

[0046] Figure 4 This specification shows a schematic diagram illustrating the relationship between sand carrying rate and gas production in an exemplary embodiment.

[0047] Figure 5 This specification shows a structural block diagram of an unconventional gas well production optimization device based on wellbore sand carrying capacity in some embodiments;

[0048] Figure 6 A structural block diagram of a computer device in some embodiments of this specification is shown.

[0049] [Explanation of Labels in the Attached Image]

[0050] 10. Optimize the device;

[0051] 20. Wellbore valves;

[0052] 51. Identification module;

[0053] 52. Acquisition Module;

[0054] 53. Confirmation module;

[0055] 54. Adjustment module;

[0056] 602. Computer equipment;

[0057] 604, Processor;

[0058] 606. Memory;

[0059] 608. Drive mechanism;

[0060] 610. Input / output interface;

[0061] 612. Input devices;

[0062] 614. Output devices;

[0063] 616. Presentation equipment;

[0064] 618. Graphical User Interface;

[0065] 620. Network interface;

[0066] 622. Communication link;

[0067] 624. Communication bus. Detailed Implementation

[0068] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0069] Figure 1 The diagram illustrates an application environment for optimizing unconventional gas well production based on wellbore sand carrying rate in some embodiments of this specification. This application environment includes an optimization device 10 and a wellbore valve 20. The optimization device 10 can identify whether the target gas well is in a stable production state; when the target gas well is in a stable production state, it acquires the sand carrying rate of the target gas well; based on the sand carrying rate and the measured sand production, it determines whether gas well production optimization is needed for the target gas well; when gas well production optimization is needed for the target gas well, it adjusts the valve opening of the wellbore valve 20 of the target gas well and reacquires the sand carrying rate of the target gas well until the current sand carrying rate of the target gas well reaches a preset value. The embodiments of this specification can achieve precise optimization of unconventional gas well production based on wellbore sand carrying rate.

[0070] In some embodiments of this specification, the optimization device 10 may be a controller, processor, or host computer of the wellhead equipment of the target gas well, or may be configured on the controller, processor, or host computer of the wellhead equipment of the target gas well, and have a software function module capable of optimizing the unconventional gas well production of the target gas well based on the wellbore sand carrying rate. The wellbore valve 20 is specifically a wellbore valve 20 in the target gas well used to control the wellbore outlet flow rate.

[0071] This specification provides an embodiment of an unconventional gas well production optimization method based on wellbore sand carrying capacity, which can be applied to the aforementioned optimization device. (Refer to...) Figure 2As shown in some embodiments of this specification, the unconventional gas well production optimization method based on wellbore sand carrying capacity may include the following steps:

[0072] Step 201: Identify whether the target gas well is in a stable production state.

[0073] Step 202: When the target gas well is in a stable production state, obtain the sand carrying rate of the target gas well.

[0074] Step 203: Determine whether the gas well production of the target gas well needs to be optimized based on the sand carrying rate and the measured sand output.

[0075] Step 204: When it is necessary to optimize the gas production of the target gas well, adjust the valve opening of the target gas well and re-acquire the sand carrying rate of the target gas well until the current sand carrying rate of the target gas well reaches the preset value.

[0076] In the embodiments described in this specification, during the gas well production process, when it is confirmed that the target gas well is in a stable production state, the sand carrying rate of the target gas well is obtained. Based on the obtained sand carrying rate and the measured sand output, it is determined whether the gas well production of the target gas well needs to be optimized. When the gas well production of the target gas well needs to be optimized, the valve opening of the target gas well is adjusted and the sand carrying rate of the target gas well is obtained again until the current sand carrying rate of the target gas well reaches the preset value. In this way, by using the sand carrying rate under the stable production state to optimize the gas well production of the target gas well, the problem that the sand carrying rate under the unstable state cannot truly reflect the sand carrying situation of the gas well and thus affects the accuracy of gas well production optimization can be reduced or avoided. This achieves accurate optimization of unconventional gas well production based on the wellbore sand carrying rate.

[0077] In the embodiments of this specification, the target gas well refers to an unconventional gas well that is in the production process and is currently the target for optimizing gas well production.

[0078] refer to Figure 3 As shown in some embodiments of this specification, identifying whether a target gas well is in a stable production state may include the following steps:

[0079] Step 301: Collect the wellhead pressure, wellhead temperature, gas production, water production, and sand production of the target gas well.

[0080] For gas wells with stable wellhead pressure, temperature, and liquid output, the gas production can be calculated back based on the preset sand carrying rate.

[0081] Step 302: Determine whether the wellhead pressure, wellhead temperature, gas production, water production, and sand production of the target gas well are all within the corresponding target range; if they are all within the corresponding target range, proceed to step 303; otherwise, proceed to step 301.

[0082] In some embodiments of this specification, determining whether the wellhead pressure, wellhead temperature, gas production, water production, and sand production of the target gas well are all within the corresponding target range may include:

[0083] Determine whether the wellhead pressure of the target gas well meets the requirements.

[0084] Determine whether the wellhead temperature of the target gas well meets the requirements.

[0085] Determine whether the gas production of the target gas well meets the requirements.

[0086] Determine whether the water production of the target gas well meets the requirements.

[0087] Determine whether the sand production rate of the target gas well meets the requirements.

[0088] Among them, P x Let P be the wellhead pressure collected at time point x, a be the sampling period, and P be the wellhead pressure. i Let b be the wellhead pressure collected at time point xa, and let b be the data point within the sampling period. x Let T be the wellhead temperature collected at time point x. i Let Q be the temperature at the i-th wellhead collected at time point xa. Gx Let Q be the amount of gas produced at time point x. Gi Let Q be the gas production rate collected at time point xa for the i-th time. Lx Let Q be the amount of water produced collected at time point x. Li Let Q be the water production rate collected at time point xa for the i-th time. Sx Let Q be the amount of sand produced at time point x. Si Let be the i-th sand output collected at time point xa.

[0089] Step 303: When the wellhead pressure, wellhead temperature, gas production, water production and sand production of the target gas well are all within the corresponding target range, the target gas well is confirmed to be in a stable production state.

[0090] In some embodiments of this specification, obtaining the sand-carrying rate of the target gas well may include:

[0091] According to the formula Calculate the sand carrying capacity of the target gas well.

[0092] Where η is the sand-carrying rate of the target gas well;

[0093] Re G Let be the gas phase Reynolds number of the target gas well, and

[0094] Re L The liquid phase Reynolds number of the target gas well; and

[0095] The true density of the liquid phase in the target gas well, and

[0096] The true gas phase density of the target gas well, and

[0097] ρ G This refers to the standard density in the gas phase.

[0098] ρ L This is the standard density of the liquid phase;

[0099] D is the inner diameter of the target gas well;

[0100] μ G The viscosity is the gas phase kinematic viscosity.

[0101] μ L The viscosity is the kinematic viscosity of the liquid phase.

[0102] This represents the actual gas phase flow rate; and

[0103] This represents the actual flow rate of the liquid phase, and

[0104] v SL =4Q Lx / πD 2 ;

[0105] α is Re G The coefficient, β is Re L The coefficient γ is a preset constant.

[0106] In some embodiments of this specification, determining whether to optimize the production of the target gas well based on the sand-carrying rate and the measured sand production can include: analyzing the calculated sand-carrying rate in conjunction with the sand production of the target gas well measured on-site. This analysis can more accurately reflect the sand production situation of the target gas well, thereby determining whether the gas well needs production optimization. Specifically, this can be divided into the following situations:

[0107] ①If η=0 and the sand output Q Sx When Q is 0, further increase the gas volume analysis (i.e., continue collecting and analyzing data). Sx If Q remains at 0, then the gas well is a non-sand-producing gas well; if Q... Sx If the rate of increase is too fast, the gas well has serious sand accumulation in the wellbore, and the gas well needs to be optimized for production.

[0108] ②If 0 < η < 1 and the sand output Q Sx When Q is 0, further increase the gas volume for analysis (i.e., continue collecting and analyzing data). Sx If Q remains at 0, then the gas well is a non-sand-producing gas well; if Q... Sx If the rate of increase is slow, the gas well's current sand-carrying capacity is insufficient, and the gas well's production needs to be optimized.

[0109] ③ If 0 < η < 1 and the sand output Q Sx If the value is not 0, the gas well needs to be optimized for production.

[0110] ④ If η≥1 and sand output Q Sx If the value is not 0, the gas well is in stable production with sand and no production optimization is required;

[0111] ⑤ If η≥1 and sand output Q Sx When the value is 0, the gas well is completely sand-laden and there is no sand in the wellbore, so no production optimization is needed.

[0112] In some embodiments of this specification, when it is necessary to optimize the gas production of the target gas well, the valve opening of the target gas well is controlled by a preset valve incremental step adjustment, and the sand carrying rate of the target gas well is re-acquired until the current sand carrying rate of the target gas well reaches the preset value.

[0113] In other words, for gas wells requiring production optimization, the method of controlling the wellhead regulating valve opening using proppant carrying capacity feedback is employed to optimize production, ensuring that the wellbore's proppant carrying capacity meets production demands. The specific process is as follows:

[0114] ①Preset a wellbore sand carrying rate value that can meet the stable production needs, calculate the sand carrying rate based on the above, and compare the calculated value with the preset value;

[0115] ② Send wellhead regulating valve opening command based on the difference between the calculated sand carrying rate and the preset value to optimize and regulate gas well production;

[0116] ③ Automatically adjust valve opening to optimize production; the larger the valve opening, the greater the wellhead flow rate. The specific relationship between opening and flow rate is related to the valve type, valve flow characteristic curve, and medium properties. For example... Figure 4 The diagram shows the approximate relationship between gas production and wellbore sand carrying capacity under stable production conditions and fixed wellhead pressure. Figure 4 As can be seen, when parameters such as production volume and wellhead pressure remain constant, the sand carrying rate increases with the increase of gas production. Therefore, when the sand carrying rate is low, the opening of the wellhead regulating valve should be increased to improve production and enhance sand carrying in the wellbore; when the sand carrying rate is high, the opening of the wellhead regulating valve should be decreased to prevent damage to the gas production equipment.

[0117] ④ After the valve opening adjustment and output optimization are completed, the sand carrying rate is recalculated and compared with the preset value when production is stable. The above calculation and comparison process is repeated until the sand carrying rate reaches the preset value, and then the output optimization is completed.

[0118] The following description is based on specific embodiments.

[0119] A shale gas well in the Chuannan gas area of ​​the Southwest Oil and Gas Field, using a 50mm inner diameter tubing, produced 1.72 Nm³ of gas. 3 / d, on-site water production 5Nm³ 3 / d, wellhead pressure 2.1MPa, the above example well illustrates the entire process of calculating the gas-liquid sand carrying rate and optimizing production in the wellbore.

[0120] (1) Gas well parameter acquisition and production status determination

[0121] Production data of the gas well is read every five minutes using wellhead flow meters, pressure gauges, and thermometers. Within half an hour, the following data are obtained: pressures at six wellheads (P1–P6), temperatures at six wellheads (T1–T6), and gas production rates at six wellheads (Q). G1 ~Q G6 6 water production volumes Q L1 ~Q L6 Sand production Q from 6 wellheads S1 ~Q S6 .

[0122] judge Is it valid?

[0123] judge Is it valid?

[0124] judge Is it valid?

[0125] judge Is it valid?

[0126] judge Is it valid?

[0127] The value of x is {5, 10, 15, 20, 25, 30}, which means the value of x is the 5th minute, the 10th minute, the 15th minute, the 20th minute, the 25th minute, and the 30th minute.

[0128] Based on the above calculations, it can be confirmed that the gas well is in a stable production state, and the sand carrying rate can be calculated.

[0129] (2) Calculation of sand carrying rate

[0130] The gas well has a production capacity of 1.72 Nm³. 3 / d, on-site water production 5Nm³ 3 / d, wellhead pressure 2.1MPa, liquid water density 1000kg / m³ 3 The density of natural gas under standard conditions is 0.7174 kg / m³. 3 Standard air kinematic viscosity: 14.8 × 10⁻⁶ m³ 2 / s, the kinematic viscosity of water is 1.01×10 -6 m 2 / s.

[0131] The apparent velocity of the gas phase calculated using the corresponding formula above is 4.90 m / s, and the apparent velocity of the liquid phase is 0.029 m / s.

[0132] The gas phase Reynolds number is calculated to be 52753.5 and the liquid phase Reynolds number is 1459.8 according to the corresponding formula above.

[0133] According to the corresponding formula above, the wellbore sand carrying rate under the current production parameters is calculated to be 0.829.

[0134] (3) Demand Analysis for Optimizing Gas Well Production

[0135] The calculated sand-carrying rate is combined with the sand production at the wellhead measured on-site to analyze the sand production situation in the wellbore, thereby determining whether the gas well should undergo production optimization.

[0136] The gas well has a sand-carrying rate η = 0.829, which satisfies condition ③: 0 < η < 1 and the sand production rate Q. Sx If the value is not 0, the gas well needs to undergo production optimization; thus, the production optimization step begins.

[0137] (4) Gas well production optimization

[0138] To ensure that all sand produced by the gas well is carried out of the wellbore, a sand-carrying rate η = 1 is preset. This rate is achieved by adjusting the valve opening by 5% each time. After production is stabilized, the sand-carrying rate is calculated and compared with the preset value. This process of valve opening adjustment, production stability assessment, sand-carrying rate calculation and comparison is repeated until the calculated sand-carrying rate η ≥ 1. Then, a production optimization demand analysis is performed based on the actual sand production. If η ≥ 1 and the sand production Q... Sx ⑤ If η≥1 and the sand output Q is not 0 or ⑤ Sx If the value is 0, the gas well can carry sand completely, achieving the production optimization target, and the production optimization process ends.

[0139] Although the process described above includes multiple operations that occur in a specific order, it should be clearly understood that these processes may include more or fewer operations, which may be executed sequentially or in parallel (e.g., using parallel processors or a multithreaded environment).

[0140] Corresponding to the aforementioned unconventional gas well production optimization method based on wellbore sand carrying rate, this specification also provides an unconventional gas well production optimization device based on wellbore sand carrying rate, as described above. Figure 5 As shown in some embodiments of this specification, the unconventional gas well production optimization device based on wellbore sand carrying rate may include:

[0141] Identification module 51 is used to identify whether the target gas well is in a stable production state;

[0142] The acquisition module 52 is used to acquire the sand carrying rate of the target gas well when the target gas well is in a stable production state.

[0143] The confirmation module 53 is used to determine whether the gas well production of the target gas well needs to be optimized based on the sand carrying rate and the measured sand output.

[0144] The adjustment module 54 is used to adjust and control the valve opening of the target gas well and re-acquire the sand carrying rate of the target gas well when it is necessary to optimize the gas well production of the target gas well, until the current sand carrying rate of the target gas well reaches a preset value.

[0145] In some embodiments of this specification, the unconventional gas well production optimization device based on wellbore sand carrying rate includes identifying whether the target gas well is in a stable production state, which includes:

[0146] The wellhead pressure, wellhead temperature, gas production, water production, and sand production of the target gas well were collected.

[0147] Determine whether the wellhead pressure, wellhead temperature, gas production, water production, and sand production of the target gas well are all within the corresponding target range;

[0148] When the wellhead pressure, wellhead temperature, gas production, water production, and sand production of the target gas well are all within the corresponding target range, the target gas well is confirmed to be in a stable production state.

[0149] In some embodiments of this specification, the unconventional gas well production optimization device based on wellbore sand carrying rate, determining whether the wellhead pressure, wellhead temperature, gas production, water production, and sand production of the target gas well are all within the corresponding target range includes:

[0150] Determine whether the wellhead pressure of the target gas well meets the requirements.

[0151] Determine whether the wellhead temperature of the target gas well meets the requirements.

[0152] Determine whether the gas production of the target gas well meets the requirements.

[0153] Determine whether the water production of the target gas well meets the requirements.

[0154] Determine whether the sand production rate of the target gas well meets the requirements.

[0155] Among them, P x Let P be the wellhead pressure collected at time point x, a be the sampling period, and P be the wellhead pressure. i Let b be the wellhead pressure collected at time point xa, and let b be the data point within the sampling period. x Let T be the wellhead temperature collected at time point x. i Let Q be the temperature at the i-th wellhead collected at time point xa. Gx Let Q be the amount of gas produced at time point x. Gi Let Q be the gas production rate collected at time point xa for the i-th time. Lx Let Q be the amount of water produced collected at time point x. Li Let Q be the water production rate collected at time point xa for the i-th time. Sx Let Q be the amount of sand produced at time point x. Si Let be the i-th sand output collected at time point xa.

[0156] In some embodiments of this specification, the unconventional gas well production optimization device based on wellbore sand carrying rate includes obtaining the sand carrying rate of the target gas well, which comprises:

[0157] According to the formula Calculate the sand carrying capacity of the target gas well;

[0158] Where η is the sand-carrying ratio of the target gas well, Re G Let α be the gas phase Reynolds number of the target gas well, and α be the Reynolds number. G The coefficient, Re L Let β be the liquid phase Reynolds number of the target gas well, and β be the Reynolds number. L The coefficient, γ, is a preset constant. The true liquid phase density of the target gas well. The true gas phase density of the target gas well.

[0159] In some embodiments of this specification, the unconventional gas well production optimization device based on wellbore sand carrying rate includes determining whether gas well production optimization of the target gas well is necessary based on the sand carrying rate and the measured sand production.

[0160] When the sand carrying rate of the target gas well is 0≤η<1 and the sand production of the target gas well remains zero, there is no need to optimize the gas well production of the target gas well.

[0161] When the sand carrying rate of the target gas well is 0≤η<1, and the sand production of the target gas well shows an increasing trend from zero to non-zero, the gas well production of the target gas well needs to be optimized.

[0162] When the sand carrying rate η of the target gas well is ≥ 0 and the sand production of the target gas well is not zero, the gas well production of the target gas well needs to be optimized.

[0163] When the sand carrying rate η of the target gas well is ≥ 0 and the sand production of the target gas well remains zero, there is no need to optimize the gas well production of the target gas well.

[0164] In some embodiments of this specification, the unconventional gas well production optimization device based on wellbore sand carrying rate includes adjusting and controlling the valve opening of the target gas well, comprising:

[0165] The valve opening of the target gas well is controlled according to a preset valve increment step adjustment.

[0166] For ease of description, the above devices are described in terms of function, divided into various units. Of course, in implementing this specification, the functions of each unit can be implemented in one or more software and / or hardware.

[0167] Embodiments of this specification also provide a computer device. For example... Figure 6 As shown, in some embodiments of this specification, the computer device 602 may include one or more processors 604, such as one or more central processing units (CPUs) or graphics processing units (GPUs), each of which may implement one or more hardware threads. The computer device 602 may also include any memory 606 for storing any kind of information, such as code, settings, data, etc. In one specific embodiment, a computer program is stored on the memory 606 and can run on the processor 604. When the computer program is run by the processor 604, it can execute instructions for the unconventional gas well production optimization method based on wellbore sand carrying rate described in any of the above embodiments. Non-limitingly, for example, the memory 606 may include any type of RAM, any type of ROM, flash memory, hard disk, optical disk, etc. More generally, any memory can use any technology to store information. Furthermore, any memory can provide volatile or non-volatile retention of information. Furthermore, any memory may represent a fixed or removable component of the computer device 602. In one scenario, when processor 604 executes associated instructions stored in any memory or combination of memories, computer device 602 can perform any operation of the associated instructions. Computer device 602 also includes one or more drive mechanisms 608 for interacting with any memory, such as hard disk drive mechanisms, optical disk drive mechanisms, etc.

[0168] Computer device 602 may also include an input / output interface 610 (I / O) for receiving various inputs (via input device 612) and providing various outputs (via output device 614). A specific output mechanism may include a presentation device 616 and an associated graphical user interface 618 (GUI). In other embodiments, the input / output interface 610 (I / O), input device 612, and output device 614 may be omitted, and the device may function solely as a computer device within a network. Computer device 602 may also include one or more network interfaces 620 for exchanging data with other devices via one or more communication links 622. One or more communication buses 624 couple the components described above together.

[0169] Communication link 622 can be implemented in any way, such as via a local area network, a wide area network (e.g., the Internet), a point-to-point connection, or any combination thereof. Communication link 622 may include any combination of hardwired links, wireless links, routers, gateway functions, name servers, etc., governed by any protocol or combination of protocols.

[0170] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), computer-readable storage media, and computer program products according to some embodiments of this specification. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processor to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processor, create a mechanism for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0171] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processor to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0172] These computer program instructions may also be loaded onto a computer or other programmable data processor, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable device for implementing the process. Figure 1One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0173] In a typical configuration, a computer device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0174] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0175] Computer-readable media, including both permanent and non-permanent, removable and non-removable media, can store information using any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by computer equipment. As defined in this specification, computer-readable media does not include transient media, such as modulated data signals and carrier waves.

[0176] Those skilled in the art will understand that the embodiments of this specification can be provided as methods, systems, or computer program products. Therefore, the embodiments of this specification can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, the embodiments of this specification can take the form of computer program products implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0177] The embodiments described in this specification can be described in the general context of computer-executable instructions, such as program modules, that are executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform a specific task or implement a specific abstract data type. The embodiments of this specification can also be practiced in distributed computing environments where tasks are performed by remote processors connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0178] It should also be understood that, in the embodiments of this specification, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0179] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0180] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this specification. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0181] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A method for optimizing the production of unconventional gas wells based on wellbore sand carrying capacity, characterized in that, include: Identify whether the target gas well is in a stable production state; When the target gas well is in a stable production state, the sand carrying capacity of the target gas well is obtained; Based on the sand carrying rate and the measured sand output, determine whether it is necessary to optimize the gas well production of the target gas well. When it is necessary to optimize the gas production of the target gas well, the valve opening of the target gas well is adjusted and controlled, and the sand carrying rate of the target gas well is reacquired until the current sand carrying rate of the target gas well reaches the preset value.

2. The unconventional gas well production optimization method based on wellbore sand carrying rate as described in claim 1, characterized in that, The process of identifying whether the target gas well is in a stable production state includes: The wellhead pressure, wellhead temperature, gas production, water production, and sand production of the target gas well were collected. Determine whether the wellhead pressure, wellhead temperature, gas production, water production, and sand production of the target gas well are all within the corresponding target range; When the wellhead pressure, wellhead temperature, gas production, water production, and sand production of the target gas well are all within the corresponding target range, the target gas well is confirmed to be in a stable production state.

3. The unconventional gas well production optimization method based on wellbore sand carrying rate as described in claim 2, characterized in that, The determination of whether the wellhead pressure, wellhead temperature, gas production, water production, and sand production of the target gas well are all within the corresponding target range includes: Determine whether the wellhead pressure of the target gas well meets the requirements. Determine whether the wellhead temperature of the target gas well meets the requirements. Determine whether the gas production of the target gas well meets the requirements. Determine whether the water production of the target gas well meets the requirements. Determine whether the sand production rate of the target gas well meets the requirements. Among them, P x Let P be the wellhead pressure collected at time point x, a be the sampling period, and P be the wellhead pressure. i Let b be the wellhead pressure collected at time point xa, and let b be the data point within the sampling period. x Let T be the wellhead temperature collected at time point x. i Let Q be the temperature at the i-th wellhead collected at time point xa. Gx Let Q be the amount of gas produced at time point x. Gi Let Q be the gas production rate collected at time point xa for the i-th time. Lx Let Q be the amount of water produced collected at time point x. Li Let Q be the water production rate collected at time point xa for the i-th time. Sx Let Q be the amount of sand produced at time point x. Si Let be the i-th sand output collected at time point xa.

4. The unconventional gas well production optimization method based on wellbore sand carrying rate as described in claim 1, characterized in that, The process of obtaining the sand-carrying rate of the target gas well includes: According to the formula Calculate the sand carrying capacity of the target gas well; Where η is the sand-carrying ratio of the target gas well, Re G Let α be the gas phase Reynolds number of the target gas well, and α be the Reynolds number. G The coefficient, Re L Let β be the liquid phase Reynolds number of the target gas well, and β be the Reynolds number. L The coefficient, γ, is a preset constant. The true liquid phase density of the target gas well. The true gas phase density of the target gas well.

5. The unconventional gas well production optimization method based on wellbore sand carrying rate as described in claim 1, characterized in that, The step of determining whether to optimize the gas well production of the target gas well based on the sand-carrying rate and the measured sand production includes: When the sand carrying rate of the target gas well is 0≤η<1 and the sand production of the target gas well remains zero, there is no need to optimize the gas well production of the target gas well. When the sand carrying rate of the target gas well is 0≤η<1, and the sand production of the target gas well shows an increasing trend from zero to non-zero, the gas well production of the target gas well needs to be optimized. When the sand carrying rate η of the target gas well is ≥ 0 and the sand production of the target gas well is not zero, the gas well production of the target gas well needs to be optimized. When the sand carrying rate η of the target gas well is ≥ 0 and the sand production of the target gas well remains zero, there is no need to optimize the gas well production of the target gas well.

6. The unconventional gas well production optimization method based on wellbore sand carrying rate as described in claim 1, characterized in that, The adjustment and control of the valve opening of the target gas well includes: The valve opening of the target gas well is controlled according to a preset valve increment step adjustment.

7. A device for optimizing the production of unconventional gas wells based on wellbore sand carrying capacity, characterized in that, include: The identification module is used to identify whether the target gas well is in a stable production state; The acquisition module is used to acquire the sand carrying rate of the target gas well when the target gas well is in a stable production state. The confirmation module is used to determine whether the gas well production of the target gas well needs to be optimized based on the sand carrying rate and the measured sand output. The adjustment module is used to adjust and control the valve opening of the target gas well and re-acquire the sand carrying rate of the target gas well when it is necessary to optimize the gas well production of the target gas well, until the current sand carrying rate of the target gas well reaches a preset value.

8. A computer device comprising a memory, a processor, and a computer program stored in the memory, characterized in that, When the computer program is run by the processor, it executes the instructions of the method according to any one of claims 1-6.

9. A computer storage medium having a computer program stored thereon, characterized in that, When the computer program is run by the processor of the computer device, it executes the instructions of the method according to any one of claims 1-6.

10. A computer program product, characterized in that, The computer program product includes a computer program that, when run by the processor of a computer device, executes instructions according to any one of claims 1-6.

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