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Non-invasive EDFM method for simulating complex crack and non-invasive EDFM device for simulating complex crack

A non-invasive, complex fracture technology, applied in the field of EDFM method and device for non-invasive simulation of complex fractures, can solve the problem of low calculation efficiency of simulated geological fractures

Active Publication Date: 2018-06-15
美国德州模拟技术公司
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Problems solved by technology

[0004] The invention provides a non-invasive EDFM method and device for simulating complex fractures, which is used to solve the defect of low calculation efficiency of existing simulated geological fractures

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  • Non-invasive EDFM method for simulating complex crack and non-invasive EDFM device for simulating complex crack
  • Non-invasive EDFM method for simulating complex crack and non-invasive EDFM device for simulating complex crack
  • Non-invasive EDFM method for simulating complex crack and non-invasive EDFM device for simulating complex crack

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[0081] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0082] Aiming at the existing technology, the embodiment of the present invention provides a new generation of fracture description model: Embedded Discrete Fracture Model (EDFM for short). This model embeds multi-scale complex discrete fractures directly into the matrix grid system. The matrix grid can be structured grid, corner point grid and unstructured grid, avoiding the traditional unstructured grid generation process of complex fractures. . The EDFM method does not need unstructured grid technology and local encryption technology to deal with complex fracture shapes, and its fracture shape can have any angle, height, length and width distribution in three-dim...

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Abstract

The invention provides a non-invasive EDFM method for simulating a complex crack and a non-invasive EDFM device for simulating the complex crack. The method comprises the steps that the crack attribute parameters, the oil deposit geological attribute parameters and the wellbore attribute parameters are acquired; the geometric intersecting relation between each crack and the matrix grid is determined, and each crack segment is corresponding to one crack grid; the number of the crack grids is determined, and the attribute parameters of the crack grids are added; and the connection relation of the crack grids and the conductivity of the corresponding connection are calculated, wherein the connection relation and the conductivity are used for determining flowing and mass transferring of the fluid in the crack and the oil deposit geology. According to the method, crack simulation is completed by using the non-invasive mode through the third-party software, and only the keywords provided bythe commercial oil deposit numerical simulation software require to be given and modified without modifying the source code of the third-party commercial oil deposit numerical simulation software; meanwhile, local grid encryption does not need to be performed around the crack so that the total number of the grids can be greatly reduced and the complex crack can be rapidly simulated.

Description

technical field [0001] The invention relates to the technical field of complex crack simulation, in particular to an EDFM method and device for non-invasive simulation of complex cracks. Background technique [0002] At present, most numerical simulation methods for fractured reservoirs are based on the classic dual-media model, which averages the flow of the fracture system. This method is only suitable for describing densely distributed small fractures, and cannot accurately reflect the flow of large fractures generated by fracturing. In response to this, another discrete structural grid fracture model has emerged, and with the widespread use of hydraulic fracturing in unconventional oil and gas reservoirs, its related flow simulation technology has been greatly developed. However, due to the extremely complex geometry of fractures, the local encryption technology around the fractures of structural grids is required, and the meshing process is very complex and cumbersome, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/02
CPCG06Q10/06315G06Q50/02
Inventor 徐毅飞于伟凯米塞佛南瑞苗继军
Owner 美国德州模拟技术公司
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