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Complex fracture network oil reservoir flow simulation method

A complex fracture and flow simulation technology, applied in the field of fractured reservoir flow simulation, can solve the problems of low precision and large amount of calculation, and achieve the effect of improved calculation accuracy and fast and efficient fracture network flow simulation

Pending Publication Date: 2022-01-11
YANGTZE UNIVERSITY
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Problems solved by technology

[0002] Almost all oil reservoirs are distributed with fractures. At present, most of the oil reservoirs are fractured oil reservoirs. The flow simulation of fractured oil reservoirs is of great significance to the exploration of fractured oil reservoirs. At present, the simulation of fractured oil reservoirs has a large amount of calculation. Or the defect of low precision

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  • Complex fracture network oil reservoir flow simulation method
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  • Complex fracture network oil reservoir flow simulation method

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Embodiment Construction

[0063] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0064] In the connection element method, the actual reservoir well points are assumed to be a series of nodes, and the nodes are connected with each other to form a one-dimensional connection path, such as figure 1 shown. For reservoirs with strong heterogeneity, fine description can also be made by adding virtual well points with 0 injection and production volume at the corresponding positions of the reservoir, such as figure 2 shown. The above method greatly improves the calculation efficiency under the premise of ensuring the calculation accuracy, and has obvious advantages.

[0065] For fractured horizontal wells with complex fracture network distribution characteristics, the node system is used to describe the reservoir equivalently, such as image 3 shown. In order...

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Abstract

The invention discloses a complex fracture network oil reservoir flow simulation method which comprises the following steps: dispersing an oil reservoir into a series of nodes according to a complex fracture network distribution rule of a fractured horizontal well control area, and representing flow characteristics of fluid in media with different scales by adopting a flow path between the nodes; estimating a pressure Laplacian operator by utilizing the node physical property, the influence domain and a weighted least square algorithm, and giving a calculation method for the conductivity reflecting the seepage capacity of the connection unit and a calculation method for the communication volume of the attribute parameter of the material basis; with a connection unit as an object, solving the flow flux in the unit through node pressure equation, carrying out semi-analysis tracking of a saturation equation along the connection unit, calculating the output dynamic state, obtaining the production dynamic states of different perforation points, and realizing simulation of complex fracture network oil reservoir flow. The method has the advantages that the fracture form can be accurately described in a node form, and fracture network flow simulation can be rapidly and efficiently carried out.

Description

technical field [0001] The invention belongs to the field of flow simulation of fractured oil reservoirs, in particular to a flow simulation method of complex fracture network oil reservoirs. Background technique [0002] Almost all oil reservoirs are distributed with fractures. At present, most of the oil reservoirs are fractured oil reservoirs. The flow simulation of fractured oil reservoirs is of great significance to the exploration of fractured oil reservoirs. At present, the simulation of fractured oil reservoirs has a large amount of calculation. or defects of low precision. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a method for simulating the flow of complex fracture network oil reservoirs with moderate calculation amount and high accuracy. [0004] The technical scheme of the present invention is as follows: a complex fracture network oil reservoir flow simulation method, comprising the follo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06F30/23G06F30/18G06F111/10G06F113/08G06F119/14
CPCG06F30/28G06F30/23G06F30/18G06F2111/10G06F2113/08G06F2119/14
Inventor 赵辉盛广龙周玉辉马嘉令湛文涛饶翔胡清雄程宏杰王辉梁成钢高阳蒋志斌
Owner YANGTZE UNIVERSITY
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