Production device and method for simulating horizontal well shaft in transparent core

Abstract

The invention relates to a production device and method for simulating a horizontal well shaft in a transparent core. The experiment device for simulating a horizontal well in the process of core production comprises a rock mass forming die, a fracture forming control system, a rock-mass-interior inflation device, a gas conveying control system, a motion control system and a horizontal well die embedded system; the gas conveying control system is connected with the rock-mass-interior inflation device through a gas conveying pipe; the motion control system is connected with a sliding polished rod through a rotating screw; the rock-mass-interior inflation device is arranged in the rock mass forming die; the rock mass forming die is a sealed box body which is formed by four transparent glass sheets through assembly; the rock-mass-interior inflation device is formed by a sealing box, a gas distributor, a fracture forming needle and the sliding polished rod; a fixing rod is arranged inside the sliding polished rod; the horizontal well die embedded system comprises a horizontal well die placement groove, an extensible die fixing device, a sliding gate and a horizontal wellbore die; the fixing rod is controlled by the fracture forming control system to implement the any orientation of arrangement of a horizontal section of the horizontal wellbore die. The invention provides the visualization method for observing the micro crack evolution law in the horizontal well fracturing process.

Description

technical field [0001] The present invention relates to a method and a preparation device for making unconventional oil and gas reservoirs such as tight oil and gas, shale oil and gas, and coalbed methane, and related gas-bearing rock masses, and specifically relates to a preparation device for simulating a horizontal well shaft in a transparent rock core and Preparation. Background technique [0002] In the production process of oil and gas engineering, especially in unconventional oil and gas production processes such as shale oil and gas, tight sandstone oil and gas, horizontal well volume fracturing technology is often used, by simulating different horizontal wellbore orientations, lengths of horizontal well sections, etc. Describe the law of crack formation. For example, the angle between the set horizontal wellbore azimuth and the natural fracture development azimuth is different, and the formed fracture propagation behavior and fracture network evolution law are obvi...

AI Technical Summary

Problems solved by technology

The fracturing technology for horizontal wells has been widely affected in oil and gas field production, but the description of the evolution law of volumetric fracturing fractures in horizontal wells such as unconventional oil and gas reservoirs is still a difficult and bottleneck problem in international oil and gas production. It is due to the particularity of on-site fracturing and there are still great limitations in the description and understanding of the fracture network law of fracturing.

As a result, many problems such as low fluid production and rapid fluid production decline in unconventional oil and gas production cannot be clearly explained

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