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Shale gas horizontal well operation method based on pressure oscillation

A technology for shale gas and horizontal wells, which is used in earth-moving drilling, wellbore/well components, vibration generating devices, etc., can solve problems such as low recovery rate of shale gas, save maintenance costs, and avoid water pressure penetration Layers, high-efficiency effects

Inactive Publication Date: 2018-07-10
YANAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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

Method used

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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. A pump vehicle and an instrument vehicle are connected to a Christmas tree through high-pressure pipelines correspondingly and connected through a data line, a sand mixing vehicle and an acid tank vehicle are connected to the pump vehicle through high-pressure pipelines correspondingly, and the pumpvehicle 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, the pressure sensor is connected to the Christmas tree through a high-pressure pipeline, and the oscillation system further comprises a high-pressure sealing valve connected to the plunger pump. According to the shale gas horizontal well operation method based on pressure oscillation, a plurality of fan-framework-shaped main cracks can be generated on a target reservoir, and long extending forky small cracks are generated in the main cracks. The instantaneous extension length of the main cracks can further be reduced, and thus pressing-penetrating of awater layer 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...

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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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