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Plateau continental facies shale gas testing and flowback equipment, gas testing 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 continuous cropping process, test direct, avoid contamination of shale reservoirs

Active Publication Date: 2022-04-05
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 facies shale gas testing and flowback equipment, gas testing method and flowback method
  • Plateau continental facies shale gas testing and flowback equipment, gas testing method and flowback method
  • Plateau continental facies shale gas testing and flowback equipment, gas testing method and flowback method

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Experimental program
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Effect test

Embodiment 1

[0042] figure 1 It is a schematic structural diagram of the plateau continental shale gas gas testing and flowback equipment in the embodiment of this application. figure 2 It is a schematic diagram of the internal structure of the plateau continental shale gas gas testing and flowback equipment in the embodiment of this 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 direction of wellbore extension, the pipeline includes a U-shaped inner pipe 2 and an outer pipe sleeved outside the inner pipe 2 The U-shape of the pipe 1 and the inner pipe 2 opens upward along the extending direction of the well, and an annular space is formed between the outer wall of the inner pipe 2 and the inner wall of the outer pipe 1; one end of the U-shaped inner pipe 2 is the first liquid inlet port 21, The other end is the second li...

Embodiment 2

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

[0064] Figure 6 It is a flow chart of the gas testing method for plateau continental shale gas in the embodiment of this application.

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

[0066] S1.1, equipment construction

[0067] The wellbore is excavated in advance, and the pipelines of plateau continental shale gas gas testing and flowback equipment are installed in the wellbore, and the fracturing fluid source A2 is 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 tube 2, the inner tube 2, the jet ...

Embodiment 3

[0080] The flowback of fracturing fluid is an important process that determines the success or failure of fracturing. A scientific process can make the fluid loss of fracturing fluid as small as possible, thereby reducing the damage to the reservoir and improving the stimulation effect. Unreasonable selection of flowback time will cause backflow of proppant, or the fracture of the formation near the gas well, so that the proppant in the fracture is not enough to form a suitable flow conductivity, which will lead to poor fracturing effect. If the drainage flow is not well controlled, insufficient flow will cause the fracturing fluid to stay for a long time, causing more damage to the formation.

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

[0082] Figure 7 It is a flow chart of the flowback metho...

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Abstract

The invention provides a plateau continental facies shale gas testing and flowback device, a gas testing method and a flowback method.The gas testing and flowback device comprises a pipeline, the pipeline comprises a U-shaped inner pipe and an outer pipe arranged outside the inner pipe in a sleeving mode, and the U shape of the inner pipe is opened upwards in the extending direction of a shaft; one end of the inner pipe is a first liquid inlet end, the other end is a second liquid inlet end, and a conical jet hole is formed in the bottom of the inner pipe; an overflowing hole penetrating through the side wall is formed in the outer pipe; a detection assembly is arranged between the outer pipe and the inner pipe and located at the overflowing hole. The first valve is located at the second liquid inlet end and used for controlling opening or closing of the second liquid inlet end; the second valve is located in the jet hole and used for controlling opening or closing of the jet hole; the third valve is located on the pipe wall of the inner pipe and used for controlling communication or disconnection between the interior of the inner pipe and the space between the inner pipe and the outer pipe; and the adapter pipe is communicated with an annular space between the inner pipe and the outer pipe. The plateau continental facies shale gas testing and flowback process can be achieved.

Description

technical field [0001] This application relates to the technical field of plateau continental shale gas, in particular to a plateau continental shale gas gas testing and flowback equipment, gas testing method and flowback method. Background technique [0002] Plateau continental shale gas reservoirs have extremely low porosity and matrix permeability, basically no natural production capacity, deep burial, and high formation pressure. Economical and effective development must be achieved through fracturing. Therefore, fracturing is the key to shale gas development. main technology. [0003] Gas testing is required before mining to detect the parameters of downhole plateau continental shale gas, and then guide the setting of preset parameters for plateau continental shale gas production. In the process of mining plateau continental shale gas, fracturing is usually used for mining. Generally, the fracturing hydraulic pressure is injected into the well, and then the mixed liqui...

Claims

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Application Information

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Patent Type & Authority Applications(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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