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Embedded discrete fracture simulation method and system considering nonlinear flow

A discrete fracture model and discrete fracture technology, applied in CAD numerical modeling, instrumentation, design optimization/simulation, etc., can solve problems such as matrix nonlinear seepage that cannot be considered, and achieve easy application and promotion, convenient calculation methods, and high calculation results. objective effect

Active Publication Date: 2020-04-24
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

Tight oil reservoirs have strong heterogeneity, multi-scale and hydraulic stimulation properties, and some traditional productivity evaluation methods are difficult to correctly describe their production characteristics. At present, commercial numerical simulators cannot accurately characterize complex fracture shapes and cannot consider matrix Nonlinear seepage in

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  • Embedded discrete fracture simulation method and system considering nonlinear flow
  • Embedded discrete fracture simulation method and system considering nonlinear flow
  • Embedded discrete fracture simulation method and system considering nonlinear flow

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Embodiment Construction

[0040] The present disclosure will be further described below in conjunction with the accompanying drawings and embodiments.

[0041] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0042] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combin...

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Abstract

The invention discloses an embedded discrete fracture simulation method and system considering nonlinear flow. The method comprises the steps: establishing a three-dimensional geologic model and an artificial fracture model of a tight oil reservoir; obtaining a continuity equation of a solution domain according to the mass conservation equation and a nonlinear seepage formula; discretizing the continuity equation, and establishing a single-phase seepage model and a numerical simulation model of the matrix-fracture system; introducing an embedded discrete fracture model to carry out spatial discretization on the three-dimensional geologic model and the artificial fracture model, deriving a numerical simulation model added with non-adjacent links, and establishing a nonlinear equation system; solving the nonlinear equation system by using a Newton iteration method; and predicting the yield of the multi-stage fractured horizontal well under different complex fracture conditions accordingto the solving result of the nonlinear equation system. The problems that an existing commercial numerical simulation method cannot accurately represent complex cracks and considers nonlinear flow ofa matrix are solved, and the calculation precision and the calculation efficiency are improved.

Description

technical field [0001] The disclosure relates to an embedded discrete fracture simulation method and system considering nonlinear flow, in particular to a numerical simulation method for nonlinear seepage in tight reservoirs based on an embedded discrete fracture model, which belongs to the field of unconventional oil and gas development. Background technique [0002] In recent years, the development of tight oil and gas has had a huge impact on the world crude oil and natural gas market. After the "shale gas revolution", the "tight oil revolution" followed. Referring to the successful experience of shale gas development and the continuous development and improvement of fracturing technology, the commercial development of tight oil has been launched worldwide. my country is very rich in the total and technical reserves of tight oil and gas, and its efficient and reasonable development is of great significance to my country's future energy industry. [0003] Tight oil and g...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F111/10G06F119/14
CPCY02A10/40
Inventor 徐建春秦婳婷周文新雷征东陈百炼
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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