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A shale gas horizontal well operation method based on pressure oscillation

A technology for shale gas and horizontal wells, which is applied in earthwork drilling, wellbore/well components, vibration generating devices, etc. It can solve the problems of low recovery rate of shale gas, save maintenance cost and reduce extension length , high efficiency effect

Inactive Publication Date: 2018-01-16
YANAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a shale gas horizontal well operating device based on pressure oscillation, which solves the problem of low shale gas recovery rate caused by the unidirectional extension of fractures in existing shale gas horizontal wells

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  • A shale gas horizontal well operation method based on pressure oscillation

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Embodiment Construction

[0025] In order to enable those skilled in the art to better understand the technical solutions in the present application, 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 The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0026] Such as figure 1 As shown, the present invention is a shale gas horizontal well operation device based on pressure oscillation, which includes not only providing the fracturing fluid in the liquid tank 1 for fracturing construction, but also providing sand proppant and multiple groups of liquid tanks The fracturing fluid and vario...

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Abstract

The invention provides an operation method of a shale gas horizontal well. The method is achieved by adopting a shale gas horizontal well operation device based on pressure oscillation, a pumping truck and a measuring truck are connected with an oil recovery tree through high-pressure pipelines, the pumping truck is connected with the measuring truck through a data wire, a fracturing blender truckand an acid tank truck are connected with the pumping truck through high-pressure pipelines, and the pumping truck is connected with an oscillation system through a high-pressure pipeline, the oscillation system comprises a signal generator, a servo mechanism and a ram pump, the oscillation system is connected with a pressure sensor through a data wire, and the pressure sensor is connected with the oil recovery tree through a high-pressure pipeline. By means of the method, multiple sector bone-shaped main cracks can be generated on a target storage layer, long small branch cracks are extendedfrom the main cracks, and the instantaneous expanding speed of the main cracks can be reduced to prevent a water layer from being penetrating by pressing.

Description

technical field [0001] The invention belongs to the technical field of natural gas exploitation operation devices and methods, and relates to a pressure oscillation-based shale gas horizontal well operation device and method. Background technique [0002] Shale gas refers to the natural gas mainly stored in sandy and silty mudstone formations in shale and shale reservoirs in the form of adsorption, release or dissolution. It has exactly the same physical and chemical properties as conventional natural gas. It is natural gas filled in shale fractures, micro pores with a pore size of several nanometers and layers. Because shale gas is usually stored in tight rock formations, it is difficult to exploit and the cost is high; therefore, it is usually necessary to take measures to increase production. During the exploitation of shale gas, fracturing is usually used to increase the permeability of the formation, so that the shale gas in the reservoir can flow into the wellbore mor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00E21B43/26
CPCE21B28/00E21B43/00E21B43/003E21B43/26E21B43/267
Inventor 李忠厚
Owner YANAN UNIV
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