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Method for acquiring concentration of pollutants in fracturing flow-back fluid of unconventional oil and gas reservoir

A technology for fracturing flowback fluid and pollutant concentration, which is applied in special data processing applications, design optimization/simulation, etc., and can solve some problems such as complex methods and few measurement methods.

Pending Publication Date: 2021-11-30
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for obtaining the concentration of pollutants in the fracturing flowback fluid of unconventional oil and gas reservoirs, which is simple in calculation and practical Strong

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  • Method for acquiring concentration of pollutants in fracturing flow-back fluid of unconventional oil and gas reservoir
  • Method for acquiring concentration of pollutants in fracturing flow-back fluid of unconventional oil and gas reservoir
  • Method for acquiring concentration of pollutants in fracturing flow-back fluid of unconventional oil and gas reservoir

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Embodiment Construction

[0129] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific implementation manners described here are only used to explain relevant content, rather than to limit the present invention.

[0130] In addition, it should be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings.

[0131] In the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0132] The fracture shapes produced by hydraulic fracturing in shale gas development are different. This paper considers the following figure 1 Non-equidistant fra...

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Abstract

The invention discloses a method for acquiring the concentration of pollutants in fracturing flow-back fluid of an unconventional oil and gas reservoir. The method comprises the following steps: establishing a convection-reaction-diffusion model of the pollutants in the fracturing flow-back fluid in a fracture system; establishing a convection-diffusion model of pollutants in the fracturing flow-back fluid in the horizontal shaft; establishing a convection-reaction-diffusion coupling model of pollutants in the fracturing flow-back fluid in the fracture-horizontal shaft; solving the convection-reaction-diffusion coupling model of the pollutants in the fracture-horizontal shaft, and obtaining the concentration of the pollutants in the fracturing flow-back fluid. According to the method, a plurality of models are established, the solution of the convection-reaction-diffusion coupling model of the pollutants in the fracturing flow-back fluid in the fracture-horizontal shaft is solved, the instantaneous concentration of the pollutants in the fracturing flow-back fluid at the wellhead is obtained, and the instantaneous concentration of the pollutants in the wellhead can be obtained in real time according to needs.

Description

technical field [0001] The invention relates to the field of shale gas reservoir development, in particular to a method for obtaining the concentration of pollutants in fracturing flowback fluid of unconventional oil and gas reservoirs. Background technique [0002] The development of shale gas mainly adopts horizontal well drilling technology and hydraulic fracturing technology. A large amount of fracturing fluid in hydraulic fracturing is gradually returned to the horizontal well after the well is opened. There are two sources of flowback fluid components: one is the chemical substances contained in the fracturing fluid itself, and the other is the chemical substances that may react with the matrix after the fracturing fluid is injected into the formation or are carried from rock fractures when the fracturing fluid is injected into the formation. walking substance. [0003] The concentration of each component in the flowback liquid is high, which cannot meet the requireme...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 胡义升赵阳董晓旭成秋荣
Owner SOUTHWEST PETROLEUM UNIV
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