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Plateau continental shale gas gas test and flowback equipment, gas test method and flowback method

A shale gas and plateau technology, applied in earthwork drilling, wellbore/well components, production fluids, etc., can solve the problems of plateau continental shale gas gas testing and flowback, etc., and achieve perforation Test the effect of continuous cropping process, improve efficiency and reduce production cost

Active Publication Date: 2022-08-05
青海省第四地质勘查院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, this application aims to provide a plateau continental shale gas gas testing and flowback equipment, gas testing method and flowback method to solve the problem that existing equipment cannot simultaneously perform plateau continental shale gas gas testing and flowback issues

Method used

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  • Plateau continental shale gas gas test and flowback equipment, gas test method and flowback method
  • Plateau continental shale gas gas test and flowback equipment, gas test method and flowback method
  • Plateau continental shale gas gas test and flowback equipment, gas test method and flowback method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] figure 1 This is a schematic structural diagram of the plateau continental shale gas gas testing and flowback equipment according to the embodiment of the present application. figure 2 This is a schematic diagram of an internal structure of the plateau continental shale gas gas testing and flowback equipment according to the embodiment of the present application.

[0043] refer to figure 1 and figure 2 , the embodiment of the present application provides a plateau continental shale gas gas testing and flowback equipment, including: a pipeline, arranged along the extension direction of the wellbore, the pipeline includes a U-shaped inner tube 2 and an outer tube sleeved outside the inner tube 2 Tube 1, the U shape of the inner tube 2 opens upward along the extension direction of the well, and an annular space is formed between the outer wall of the inner tube 2 and the inner wall of the outer tube 1; one end of the U-shaped inner tube 2 is the first liquid inlet end 21...

Embodiment 2

[0063] The embodiment of the present application provides a gas test method for plateau continental shale gas using the plateau continental shale gas gas test and flowback equipment in Embodiment 1 of the present application.

[0064] Image 6 This is a flow chart of the gas testing method for plateau continental shale gas according to the embodiment of the present application.

[0065] refer to Image 6 , the gas testing method for plateau continental shale gas according to the embodiment of the present application includes:

[0066] S1.1, equipment construction

[0067] The wellbore was excavated in advance, and the pipelines of the plateau continental shale gas test and flowback equipment were installed in the wellbore, and the fracturing fluid source A2 was connected at the same time.

[0068] S1.2, adjust the valve

[0069] Close the first valve 3, open the second valve 4, and close the third valve 5. At this time, the first liquid inlet end 21 of the inner pipe 2, t...

Embodiment 3

[0080] The flowback of fracturing fluid is an important process that determines the success or failure of fracturing. The formulation of a scientific process can reduce the filtration loss of fracturing fluid as much as possible, thereby reducing the damage to the reservoir and improving the stimulation effect. The unreasonable selection of the flowback timing will cause the backflow of the proppant, or the formation near the gas well will be broken, so that the proppant in the fracture is not enough to form a suitable flow conductivity, which will lead to poor fracturing operation effect, followed by the backflow. Poor control of drainage flow and insufficient flow will cause fracturing fluid to stay for a long time and cause more damage to the formation.

[0081] The embodiment of the present application provides a flowback method for plateau continental shale gas, using the plateau continental shale gas gas testing and flowback equipment in Example 1 of the present applicati...

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Abstract

The present application provides a gas test and flowback equipment, a gas test method and a flowback method for plateau continental shale gas, wherein the gas test and flowback equipment includes: a pipeline, and the pipeline includes a U-shaped inner pipe and sleeves inside The outer tube outside the tube, the U-shape of the inner tube opens upward along the extension direction of the wellbore; one end of the inner tube is the first liquid inlet end, the other end is the second liquid inlet end, and the bottom of the inner tube is provided with a conical jet hole; The outer tube is provided with a flow hole through the side wall; a detection component is arranged between the outer tube and the inner tube, and the detection component is located at the flow hole; the first valve, located at the second liquid inlet end, is used to control the second liquid inlet The opening or closing of the end; the second valve, located in the jet hole, is used to control the opening or closing of the jet hole; the third valve, located on the pipe wall of the inner pipe, is used to control the inside of the inner pipe and the inner pipe and the outer pipe. The space is connected or disconnected; the transfer tube is connected with the annular space between the inner tube and the outer tube. The present application can realize the gas test and flowback process of plateau continental shale gas.

Description

technical field [0001] The present application relates to the technical field of plateau continental shale gas, and in particular, to a gas test and flowback device, a gas test method and a flowback method of plateau continental shale gas. Background technique [0002] Plateau continental shale gas reservoirs have extremely low porosity and matrix permeability, basically have no natural productivity, and are deeply buried and have high formation pressure. They must be developed through fracturing to achieve economical and effective development. Therefore, fracturing is a shale gas development. main technology. [0003] Before exploitation, gas test is required to detect the parameters of downhole plateau continental shale gas, and then guide the preset parameter setting for plateau continental shale gas exploitation. In the process of exploiting plateau continental shale gas, fracturing is usually used for exploitation. Generally, the fracturing hydraulic pressure is inject...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26E21B43/267E21B49/00
Inventor 徐永锋潘彤陈建洲王瑾晁海德巩志远王琪玮李青谢菁刘立波李吉庆赵洪岳蔡廷俊
Owner 青海省第四地质勘查院
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