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Simulation method of unsteady gas-water two-phase seepage in dual-media gas reservoirs based on pores and fractures

A dual-media, simulation-based technique for permeability/surface area analysis, suspension and porous material analysis, instrumentation, and more

Active Publication Date: 2021-06-01
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a simulation method for unsteady-state gas-water two-phase seepage based on pore-fracture dual-media gas reservoirs, which solves the current problems of unsteady-state seepage simulation research on pore-fracture dual-media lack of

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  • Simulation method of unsteady gas-water two-phase seepage in dual-media gas reservoirs based on pores and fractures
  • Simulation method of unsteady gas-water two-phase seepage in dual-media gas reservoirs based on pores and fractures
  • Simulation method of unsteady gas-water two-phase seepage in dual-media gas reservoirs based on pores and fractures

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[0049] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in...

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Abstract

The invention relates to a method for simulating unsteady gas-water two-phase seepage in dual-media gas reservoirs based on pores and fractures. The core pore throat length and coordination number of the pore network model, the number of added fractures; the establishment of a pore-fracture dual-media model; the introduction of unsteady-state seepage theory and the combination of dynamic network simulation algorithm and unsteady-state seepage theory The gas-water two-phase seepage and pressure propagation process are simulated. The present invention simulates the unsteady gas-water two-phase flow on the basis of the pore-fracture dual-media model. In the traditional gas-water two-phase seepage process, the dynamic network simulation considering the fluid compressibility can more accurately describe the pore-level gas-water two-phase flow. Phase flow process; it can analyze the pressure distribution and pressure wave propagation of gas-water two-phase in the dual medium of pores and fractures, and help to study the flow law of fluid in pores and fractures.

Description

technical field [0001] The invention relates to the field of oil and gas field development, in particular to a method for simulating unsteady gas-water two-phase seepage in dual-media gas reservoirs based on pores and fractures. Background technique [0002] my country's natural gas reserves are large and widely used, and it is one of the important clean energy sources. After years of research, the development methods of conventional gas reservoirs have become mature. Most researchers use a single pore sandstone structure network model for gas reservoir numerical simulation research, and this type of technology has become increasingly mature, but considering low permeability-dual media There are relatively few studies on the mechanism of unsteady seepage in gas reservoirs. [0003] At present, many researchers at home and abroad usually use the continuum theory to study multiphase seepage in porous media. However, due to the discontinuity of viscous force and capillary forc...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08G01N13/04G01N23/046G01N24/08
CPCG01N13/04G01N15/08G01N23/046G01N24/081
Inventor 杨鑫唐雁冰李闽吴倩
Owner SOUTHWEST PETROLEUM UNIV
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