Pressure channeling prevention simulation system and method

Abstract

The invention discloses a pressure channeling prevention and control simulation system and method. The pressure channeling prevention and control simulation system comprises a material pumping module, a runner simulation module and a data processing module. The runner simulation module comprises a groove body, a cover plate positioned above the groove body and a waste barrel; the groove body is in a cuboid shape, and a liquid inlet and a liquid outlet are formed in the two opposite side faces of the groove body respectively. A liquid inlet of the tank body is connected with the material pumping module through a water pipe; a liquid outlet of the tank body is connected with the waste barrel through a water pipe; a porous medium simulation flow channel is placed in the tank body; a plurality of pressure monitoring holes and filtration holes are formed in the bottom surface of the tank body; the filtration hole is used for simulating a fracturing fluid filtration channel; the data processing module is used for processing the collected data of the pressure gauge to obtain pressure channeling prevention and control simulation data, evaluation of the prevention and control effect of a pressure channeling prevention and control strategy under different reservoir geological background conditions is achieved, and the efficiency of pressure channeling prevention and control is improved.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas field development, and in particular to a pressure channeling prevention and control simulation system and method. Background Art

[0002] This section is intended to provide a background or context to the embodiments of the invention recited in the claims. No description herein is admitted to be prior art by inclusion in this section.

[0003] With the large-scale construction of shale gas horizontal well development networks, pressure channeling between wells has occurred frequently, seriously affecting the production effect of gas wells. The main scenario for pressure channeling is that there are old production wells around the fracturing wells or there are natural fractures and other advantageous channels between wells. The main reason is that the hydraulic fractures of the fracturing wells are induced by the low-pressure areas of the old wells or the advantageous channels of natural fractures, resulting in non-uniform extension, and some extremely long fractures connecting to adjacent wells.

[0004] The existing method takes the probability of well-to-well connectivity as the objective function. This method can be used to optimize the temporary plugging design to achieve pressure channeling prevention. However, this method is mainly based on mathematical models, and the empirical parameter values ​​and temporary plugging and channeling prevention design still need to rely on indoor experimental data.

[0005] At present, there is an urgent need for a pressure channeling prevention and control simulation system to solve the above problems. Summary of the invention

[0006] The embodiment of the present invention provides a pressure channeling prevention simulation system for improving the efficiency of pressure channeling prevention and control, and realizing the evaluation of the prevention and control effect of the pressure channeling prevention and control strategy under different reservoir geological background conditions. The system includes: a material pumping module, a flow channel simulation module and a data processing module;

[0007] The material pumping module is used to pump the stirred liquid into the flow channel simulation module;

[0008] The flow channel simulation module includes a tank body, a cover plate located above the tank body, and a waste barrel;

[0009] The tank body is in the shape of a rectangular parallelepiped, and two opposite sides of the tank body respectively include a liquid inlet and a liquid outlet; the liquid inlet of the tank body is connected to the material pumping module through a water pipe; the liquid outlet of the tank body is connected to the waste barrel through a water pipe;

[0010] A porous medium simulation flow channel is placed in the tank;

[0011] The bottom surface of the tank is provided with multiple pressure monitoring holes and filtration holes;

[0012] The pressure monitoring hole is used to install the pressure gauge, and the pressure monitoring hole corresponds to the pressure gauge one by one; the filtration hole is used to simulate the channel for the filtration of fracturing fluid;

[0013] The data processing module is used to process the collected data from the pressure gauge to obtain pressure channeling prevention and control simulation data.

[0014] The embodiment of the present invention provides a pressure channeling prevention simulation method for improving the efficiency of pressure channeling prevention and control, and realizing the evaluation of the prevention and control effect of the pressure channeling prevention and control strategy under different reservoir geological background conditions. The method includes:

[0015] The data processing module obtains the instantaneous pressure of each point of the porous medium simulation flow channel in the tank body collected by the pressure gauge;

[0016] Calculate the pressure difference at each point based on the instantaneous pressure at each point in the porous medium simulation flow channel;

[0017] The pressure channeling prevention simulation data is determined according to the pressure difference at each point; the pressure channeling prevention simulation data includes the pressure wave range at different times.

[0018] In an embodiment of the present invention, a pressure channeling prevention and control simulation system includes a material pumping module, a flow channel simulation module and a data processing module; the material pumping module is used to pump the stirred liquid into the flow channel simulation module; the flow channel simulation module includes a trough body, a cover plate located above the trough body and a waste barrel; the trough body is in the shape of a rectangular parallelepiped, and the two opposite sides of the trough body respectively include a liquid inlet and a liquid outlet; the liquid inlet of the trough body is connected to the material pumping module through a water pipe; the liquid outlet of the trough body is connected to the waste barrel through a water pipe; a porous medium simulation flow channel is placed in the trough body; a plurality of pressure monitoring holes and filtration holes are provided on the bottom surface of the trough body; the pressure monitoring holes are used to install pressure gauges, and the pressure monitoring holes correspond to the pressure gauges one by one; the filtration holes are used to simulate the channels for the filtration of fracturing liquid; the data processing module is used to process the collected data of the pressure gauge to obtain pressure channeling prevention and control simulation data. Compared with the prior art, the evaluation of the prevention and control effect of the pressure channeling prevention and control strategy under different reservoir geological background conditions is realized, and effective data support is provided for the design of field pressure channeling prevention and control process parameters, thereby improving the efficiency of pressure channeling prevention and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 A schematic diagram of a pressure channeling prevention simulation system provided by the present invention;

[0021] Figure 2 A left view of the flow channel simulation module provided by the present invention;

[0022] Figure 3A schematic diagram of the conditions for simulating the existence of natural fractures in a porous medium simulation flow channel provided by the present invention;

[0023] Figure 4 A schematic diagram of the conditions for the existence of artificial fractures in a porous medium simulated flow channel provided by the present invention;

[0024] Figure 5 The present invention provides a flow chart of the pressure channeling prevention simulation method. DETAILED DESCRIPTION

[0025] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0026] The acquisition, storage, use, and processing of data in the technical solution of this application comply with the relevant provisions of national laws and regulations.

[0027] The term "and / or" herein only describes an association relationship, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C may represent including any one or more elements selected from the set consisting of A, B, and C.

[0028] In the description of this specification, the terms "include", "including", "have", "contain", etc. are all open terms, which mean including but not limited to. The descriptions with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", etc. mean that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The order of steps involved in each embodiment is used to schematically illustrate the implementation of the present application, and the order of steps is not limited and can be appropriately adjusted as needed.

[0029] A pressure channeling prevention simulation system provided by an embodiment of the present invention includes a material pumping module, a flow channel simulation module and a data processing module;

[0030] The material pumping module is used to pump the stirred liquid into the flow channel simulation module;

[0031] The flow channel simulation module includes a tank body, a cover plate located above the tank body, and a waste barrel;

[0032] The tank body is in the shape of a rectangular parallelepiped, and two opposite sides of the tank body respectively include a liquid inlet and a liquid outlet; the liquid inlet of the tank body is connected to the material pumping module through a water pipe; the liquid outlet of the tank body is connected to the waste barrel through a water pipe;

[0033] In a possible implementation manner, the tank body is placed horizontally.

[0034] In a possible implementation, a stainless steel tank body and a transparent fiberglass cover are used.

[0035] A porous medium simulation flow channel is placed in the tank;

[0036] The bottom surface of the tank is provided with multiple pressure monitoring holes and filtration holes;

[0037] The pressure monitoring hole is used to install the pressure gauge, and the pressure monitoring hole corresponds to the pressure gauge one by one; the filtration hole is used to simulate the channel for the filtration of fracturing fluid;

[0038] The data processing module is used to process the collected data from the pressure gauge to obtain pressure channeling prevention and control simulation data.

[0039] In the embodiment of the present invention, the tank body and the cover plate are connected via a rubber sealing element.

[0040] In the embodiment of the present invention, the porous medium simulation flow channel is formed by cutting and combining filter cottons of different filtration specifications.

[0041] In the embodiment of the present invention, the multiple liquid inlets and the multiple liquid outlets of the tank body are symmetrically arranged on two opposite sides of the tank body.

[0042] In the embodiment of the present invention, the multiple pressure monitoring holes on the bottom surface of the tank body are evenly distributed.

[0043] like Figure 1 As shown, the material pumping module includes a storage tank and a feeding pump; the storage tank includes a storage tank body, a feeding port, a stirring motor, an upper stirring paddle and a lower stirring paddle; one end of the feeding pump is connected to the storage tank, and the other end is connected to the liquid inlet of the tank body; the stirring motor is connected to the upper stirring paddle and the lower stirring paddle respectively. Three holes are symmetrically opened on the left and right sides of the tank body, serving as liquid inlet a, liquid inlet b, liquid inlet c and liquid outlet a, liquid outlet b, liquid outlet c.

[0044] As can be seen from the figure, 9 pressure monitoring holes are opened on the bottom of the tank body as installation holes for pressure gauges, and 4 filtration holes are opened on the bottom of the tank body as channels for simulating fracturing fluid filtration.

[0045] like Figure 2 Shown is the left view of the flow channel simulation module.

[0046] In the embodiment of the present invention, the cover plate and the trough body can be sealed and clamped.

[0047] The porous medium simulation flow channel is located between the cover plate and the tank body and is sealed and clamped.

[0048] In an embodiment of the present invention, the material pumping module pumps the materials required for the pressure channeling prevention process through the porous medium simulation flow channel, monitors the instantaneous pressure of each point in the flow channel through a pressure gauge, calculates the pressure difference at each point, determines the pressure wave range and time, and then evaluates the effect of the pressure channeling prevention process.

[0049] The above scheme, by simulating the solid-liquid two-phase flow between wells under different connectivity conditions, can evaluate and optimize the effects of different pressure channeling prevention and control processes, guide the field application design of pressure channeling prevention and control processes, and improve the pertinence of pressure channeling prevention and control. It can also evaluate the prevention and control effects of pressure channeling prevention and control processes under different reservoir geological background conditions.

[0050] The embodiment of the present invention can simulate different natural fracture paths and scales, and simulate different artificial fracture filling and communication degrees by cutting and combining filter cottons of different filtration specifications to make a porous medium simulation flow channel. Figure 3 As shown in Figure 1, it is a schematic diagram of the conditions for simulating the existence of natural fractures in porous media simulation channels. Figure 4 As shown, it is a schematic diagram of the conditions for simulating the existence of artificial fractures in porous medium simulation channels.

[0051] The embodiment of the present invention can realize the specification and quantity of the storage tank and the feeding pump as required. According to different configurations, functions such as temporary plugging and steering, adjusting the perforation position, and controlling the construction scale can be realized.

[0052] like Figure 5 As shown, the present invention also provides a pressure channeling prevention simulation method applied to the pressure channeling prevention simulation system described in the above embodiment, comprising:

[0053] S501, a data processing module obtains the instantaneous pressure of each point of the porous medium simulation flow channel in the tank body collected by a pressure gauge;

[0054] S502, calculating the pressure difference at each point according to the instantaneous pressure at each point of the porous medium simulation flow channel;

[0055] S503, determining pressure channeling prevention simulation data according to the pressure difference at each point; the pressure channeling prevention simulation data includes the pressure wave range at different times.

[0056] The above scheme, by simulating the solid-liquid two-phase flow between wells under different connectivity conditions, can evaluate and optimize the effects of different pressure channeling prevention and control processes, guide the field application design of pressure channeling prevention and control processes, and improve the pertinence of pressure channeling prevention and control. It can also evaluate the prevention and control effects of pressure channeling prevention and control processes under different reservoir geological background conditions.

[0057] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pressure channeling prevention simulation system, characterized in that: Including material pumping module, flow channel simulation module and data processing module; The material pumping module is used to pump the stirred liquid into the flow channel simulation module; The flow channel simulation module includes a tank body, a cover plate located above the tank body, and a waste barrel; The tank body is in the shape of a rectangular parallelepiped, and two opposite sides of the tank body respectively include a liquid inlet and a liquid outlet; the liquid inlet of the tank body is connected to the material pumping module through a water pipe; the liquid outlet of the tank body is connected to the waste barrel through a water pipe; A porous medium simulation flow channel is placed in the tank; The bottom surface of the tank is provided with multiple pressure monitoring holes and filtration holes; The pressure monitoring hole is used to install the pressure gauge, and the pressure monitoring hole corresponds to the pressure gauge one by one; the filtration hole is used to simulate the channel for the filtration of fracturing fluid; The data processing module is used to process the collected data from the pressure gauge to obtain pressure channeling prevention and control simulation data.

2. The pressure channeling prevention simulation system according to claim 1, characterized in that: The material pumping module includes a storage tank and a feeding pump; the storage tank includes a storage tank body, a feed port, a stirring motor, an upper stirring paddle and a lower stirring paddle; one end of the feeding pump is connected to the storage tank, and the other end is connected to the liquid inlet of the tank body; the stirring motor is respectively connected to the upper stirring paddle and the lower stirring paddle.

3. The pressure channeling prevention simulation system according to claim 1, characterized in that: The tank body and the cover plate are connected via a rubber sealing element.

4. The pressure channeling prevention simulation system according to claim 1, characterized in that: The porous medium simulation flow channel is formed by cutting and combining filter cottons of different filtration specifications.

5. The pressure channeling prevention simulation system according to claim 1, characterized in that: The multiple liquid inlets and multiple liquid outlets of the tank body are symmetrically arranged on two opposite sides of the tank body.

6. The pressure channeling prevention simulation system according to claim 1, characterized in that: The multiple pressure monitoring holes on the bottom surface of the tank body are evenly distributed.

7. A pressure channeling prevention simulation method, characterized in that: The pressure channeling prevention simulation system applied to any one of claims 1 to 6 comprises: The data processing module obtains the instantaneous pressure of each point of the porous medium simulation flow channel in the tank body collected by the pressure gauge; Calculate the pressure difference at each point based on the instantaneous pressure at each point in the porous medium simulation flow channel; The pressure channeling prevention simulation data is determined according to the pressure difference at each point; the pressure channeling prevention simulation data includes the pressure wave range at different times.

8. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method of claim 7 is implemented.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method of claim 7 is implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the method of claim 7 is implemented.

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