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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 shale gas recovery, save maintenance costs, and avoid water penetration Layers, the effect of reducing maintenance costs

Inactive Publication Date: 2018-06-12
YANAN UNIV
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  • Description
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a shale gas horizontal well operation method 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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  • 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 a shale gas horizontal well operation method based on pressure oscillation. The shale gas horizontal well operation method is implemented through a shale gas horizontal well operation device based on pressure oscillation. Specifically, a pump truck and an instrument truck are connected to a Christmas tree through high-pressure pipelines and connected through a data line; a fracturing blender truck and an acid tank truck are connected to the pump truck through high-pressure pipelines; the pump truck is further connected with an oscillation system through a high-pressure pipeline; the oscillation system comprises a signal generator, a servo mechanism and a plunger pump and is connected with a pressure sensor through a data line; and the pressure sensor is connected tothe Christmas tree through a high-pressure pipeline. Through the shale gas horizontal well operation method based on pressure oscillation, target reservoir can generate a plurality of fan-rib-shaped main cracks, and furcal small cracks with the large extending lengths are generated on the main cracks; and the instantaneous extending lengths of the main cracks can be further decreased, and accordingly the situation that a water layer is penetrated in a pressed mode is avoided.

Description

[0001] This application is a divisional application with an application date of May 6, 2016, an application number of 201610298193.2, and an invention title of "A Method for Operating Shale Gas Horizontal Wells Based on Pressure Oscillation". technical field [0002] The invention belongs to the technical field of natural gas exploitation operation devices and methods, and relates to a shale gas horizontal well operation method based on pressure oscillation. Background technique [0003] 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 usua...

Claims

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Application Information

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