Coupling method of fracturing network expansion and production dynamics in horizontal wells in unconventional oil and gas reservoirs

A technology of production dynamics and fracture expansion, applied in earthwork drilling, wellbore/well components, design optimization/simulation, etc., can solve the problems of lack of coupling simulation technology, failure to capture the dynamic response of mechanics and flow interaction, etc., to achieve compensation independent effects

Active Publication Date: 2022-08-02
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

However, the existing volumetric fracturing fracture network expansion and gas well production dynamic simulation are independent of each other, and cannot capture the mutual dynamic response of mechanics and flow, and lack effective coupling simulation technology

Method used

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  • Coupling method of fracturing network expansion and production dynamics in horizontal wells in unconventional oil and gas reservoirs
  • Coupling method of fracturing network expansion and production dynamics in horizontal wells in unconventional oil and gas reservoirs
  • Coupling method of fracturing network expansion and production dynamics in horizontal wells in unconventional oil and gas reservoirs

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Embodiment Construction

[0020] In order to have a clearer understanding of the technical features, purposes and beneficial effects of the present invention, the technical solutions of the present invention are now described in detail below, but should not be construed as limiting the scope of implementation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] (1) First, input the reservoir geomechanical parameters, natural fracture parameters, engineering parameters, and combine the fracture failure type criteria to simulate the fracturing fracture network morphology and spatial distribution characteristics, such as figure 2 shown.

[0023] The specific parameters used in this example...

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Abstract

The invention discloses a method for coupling expansion of horizontal well pressure fracture network and production dynamics in unconventional oil and gas reservoirs, belonging to the technical field of oil and gas reservoir development. The invention establishes a complex fracture network model of fracturing horizontal wells in unconventional oil and gas reservoirs based on the fracturing fracture propagation theory; combines the embedded discrete fracture model to build three-dimensional and three-phase seepage mathematical models of fracturing horizontal wells; uses finite difference method and three-dimensional orthogonal cube The grid establishes a fully implicit numerical calculation model and solves iteratively, and accurately predicts the production performance characteristics of fracturing horizontal wells in unconventional oil and gas reservoirs. The invention makes up for the disadvantage that the traditional fracture network expansion model and the production performance prediction model are independent of each other. By combining the fracture expansion model and the production performance prediction model, the integrated simulation of the fracture network expansion and production performance of the horizontal well pressure in unconventional oil and gas reservoirs is realized. predict.

Description

technical field [0001] The invention relates to the technical field of unconventional oil and gas reservoir exploitation, in particular to a method for coupling expansion of horizontal well pressure fracture network and production dynamics in unconventional oil and gas reservoirs. Background technique [0002] Unconventional oil and gas reservoir resources in my country are huge, which are the main areas for increasing reserves and production at present and in the future. Compared with conventional oil and gas reservoirs, unconventional oil and gas reservoirs have more complex reservoir geological conditions, and have the characteristics of natural fractures, low porosity and low permeability, and extremely low natural production. Field practice shows that horizontal wells with long sections and volume fracturing technology are the main means to obtain industrial productivity in unconventional oil and gas reservoirs. By injecting high-pressure fluid higher than the fracture...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23E21B43/267G06F111/10
CPCG06F30/23E21B43/267G06F2111/10E21B43/26E21B2200/20E21B43/305
Inventor 赵玉龙张烈辉张芮菡曾斌唐慧莹潘军
Owner SOUTHWEST PETROLEUM UNIV
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