A simulation method and system for gas flow in multi-scale cracks of a shale gas reservoir

A technology for gas flow and shale gas reservoirs, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as large amount of calculation and high requirements for input information, and achieve high simulation accuracy and fast simulation speed , Accurate numerical simulation of shale gas reservoirs

Active Publication Date: 2019-04-02
CHINA PETROLEUM & CHEM CORP +1
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This method provides the most accurate and direct solution for the numerical simulation of fractured re

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  • A simulation method and system for gas flow in multi-scale cracks of a shale gas reservoir
  • A simulation method and system for gas flow in multi-scale cracks of a shale gas reservoir
  • A simulation method and system for gas flow in multi-scale cracks of a shale gas reservoir

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[0053] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0054] figure 1 Shows a flow chart of the method for simulating gas flow in multi-scale fractures in a shale gas reservoir according to the present invention, figure 2 Shows a schematic diagram of embedding a discrete crack model into a background grid according to an embodiment of the present invention, Figure 3a , Figure 3b with Figure 3c Respectively show three types of non-adjacent connection schematic diagrams of a method for simulating gas flow in multi-scale ...

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Abstract

The invention discloses a simulation method and system for gas flow in a multi-scale crack of a shale gas reservoir. The method comprises the following steps of preparing and processing data; establishing an equivalent medium model according to the secondary fracture grid of the shale gas reservoir, and taking the equivalent medium model as a background grid; establishing a discrete fracture modelaccording to the large-scale artificial hydraulic fracture, and embedding the discrete fracture model into the background grid; determining adjacent connections between the background grids, all non-adjacent connections between the background grids and the discrete fracture model and all non-adjacent connections in the discrete fracture model, and further establishing a double-medium model; and performing numerical simulation based on the double-medium model. According to the simulation method for gas flow in the multi-scale cracks of the shale gas reservoir in combination with the discrete crack model and the equivalent medium model, numerical simulation of the shale gas reservoir can be more accurately carried out, the productivity of a shale gas well is accurately predicted, and a foundation is laid for adjustment of a subsequent development scheme.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and more specifically relates to a method and system for simulating gas flow in multi-scale fractures of shale reservoirs. Background technique [0002] Due to the characteristics of tightness and low permeability of shale gas reservoirs, in order to increase shale gas productivity, it is necessary to use staged fracturing horizontal well technology to stimulate shale gas reservoirs in the process of shale gas development. Artificial hydraulic fractures and secondary fracture networks of different scales formed by staged fracturing technology will significantly increase the permeability of shale reservoirs, have a great impact on fluid flow in shale reservoirs, and will directly affect the development effect of gas reservoirs. Therefore, accurately constructing multi-scale fracture models of shale gas reservoirs and simulating gas flow in fractures of different scales is the key to...

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Application Information

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IPC IPC(8): G06F17/50G06Q50/02
CPCG06Q50/02G06F30/20
Inventor 戴城计秉玉王卫红刘华胡小虎郭艳东王妍妍
Owner CHINA PETROLEUM & CHEM CORP
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