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Simulating device for dynamic impact fracture of horizontal well

A simulation device and impact fracture technology, which can be used in the extraction of undisturbed core devices, wellbore/well components, production fluids, etc., and can solve problems such as disadvantage and simulation.

Active Publication Date: 2018-03-06
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

[0004] Although many scholars have carried out corresponding explorations on the dynamic rock fracture simulation experiment device for deflagration fracturing, the simulation test devices in the prior art are all aimed at vertical wells.
However, horizontal wells and vertical wells are different in wellbore structure. Horizontal wells have long deflagration fracturing intervals, and the rock stress state is also different from vertical wells. Therefore, the simulation device in the prior art is not conducive to the deflagration of rocks in the long section of horizontal wells. Fracturing simulates the cracking of rock

Method used

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  • Simulating device for dynamic impact fracture of horizontal well
  • Simulating device for dynamic impact fracture of horizontal well

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with accompanying drawing.

[0032] figure 1 A structural diagram of a simulation device 100 for dynamic impact fracturing of a horizontal well according to the present invention is shown. Such as figure 1 As shown, the simulation device 100 includes a force transmitter 1 , a driver 2 , an adapter 3 and a core holder 4 . Wherein, the force transmission device 1 includes a cylindrical housing 11 and a force transmission column 12 arranged in the housing 11 , and the force transmission column 12 can move in a sealed manner relative to the housing 11 . The driver 2 is arranged at the first end of the force transmission device 1 , and is used for providing impact force to the force transmission column 12 to drive the force transmission column 12 to move. The adapter 3 is arranged at the second end of the force transmitter 1, and its inner cavity communicates with the inner cavity of the casing 11, and i...

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Abstract

The invention provides a simulating device for dynamic impact fracture of a horizontal well. The simulating device comprises a force transmitter, a driver, a connector and a core clamping device. Theforce transmitter comprises a cylindrical shell and a force transmitting column arranged in the shell; a driver is arranged at the first end of the force transmitter and used for pushing the force transmitting column to move relative to the shell; the connector is arranged at the second end of the force transmitter, and an inner cavity of the connector communicates with an inner cavity of the shell; and the core clamping device is arranged at the second end of the connector. According to the simulating device, pulse pressure can be formed so as to simulate the real state in a shaft, and accordingly the crack forms of rock fracturing at the long well section and the multilayer section of the horizontal well are simulated.

Description

technical field [0001] The invention relates to the reservoir transformation technology of unconventional oil and gas reservoirs such as shale gas and tight sandstone gas in the field of oil and gas field development, in particular to a simulation device for dynamic impact fracture of horizontal wells. Background technique [0002] Horizontal well pulse deflagration fracturing technology uses solid gunpowder as the energy source to produce fast and slow combustion reactions to form multi-stage pulse pressure. This pressure pulse impacts the formation around the perforation hole through the pressure relief hole of the fracturing gun, and forms a number of radial fractures in the oil and gas layers around the wellbore (the direction of the fracture is not affected by the in-situ stress). Repeated reconstruction, at the same time make the formation form a new uniform radial fracture network, maximize the conductivity of the fracture, eliminate the reservoir pollution near the w...

Claims

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Application Information

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IPC IPC(8): E21B43/26E21B25/00
CPCE21B25/00E21B43/26
Inventor 孙志宇苏建政张汝生刘长印黄志文李风霞林鑫
Owner CHINA PETROLEUM & CHEM CORP
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