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Unconventional oil and gas reservoir horizontal well fracturing fracture net expansion and production dynamic coupling method

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

Active Publication Date: 2021-07-06
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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  • Unconventional oil and gas reservoir horizontal well fracturing fracture net expansion and production dynamic coupling method
  • Unconventional oil and gas reservoir horizontal well fracturing fracture net expansion and production dynamic coupling method
  • Unconventional oil and gas reservoir horizontal well fracturing fracture net expansion and production dynamic coupling method

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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 solution of the present invention is described in detail below, but it 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 making creative efforts belong to 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 reservoir geomechanics parameters, natural fracture parameters, and engineering parameters, combined with the fracture failure type criterion, simulate the fracture network shape and spatial distribution characteristics of fracturing fractures, such as figure 2 shown.

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

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Abstract

The invention discloses an unconventional oil and gas reservoir horizontal well fracturing fracture net expansion and production dynamic coupling method, and belongs to the technical field of oil and gas reservoir development. The method comprises the following steps: establishing an unconventional oil and gas reservoir fractured horizontal well complex fracture network model based on a fractured fracture propagation theory; constructing a three-dimensional and three-phase seepage mathematical model of the fractured horizontal well in combination with the embedded discrete fracture model; and establishing a fully implicit numerical calculation model by using a finite difference method and a three-dimensional orthogonal cubic grid, performing iterative solution, and accurately predicting the production dynamic characteristics of the unconventional oil and gas reservoir fractured horizontal well . According to the method, the defect that a traditional fracture network expansion model and a production dynamic prediction model are mutually independent is overcome, and unconventional oil and gas reservoir horizontal well fracture network expansion and production dynamic integrated simulation prediction is achieved by combining the fracture expansion model and the production dynamic prediction model.

Description

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

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Application Information

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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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