Full-size well wall stable simulator

A wellbore stability and simulator technology, applied in boreholes/well components, measurement, earthwork drilling and production, etc., can solve the problems of limited measurement parameters, inability to simulate the mechanical environment, and inability to intuitively respond to the wellbore, so as to facilitate popularization , optimize performance, and intuitively observe the effect

Active Publication Date: 2014-05-07
SOUTHWEST PETROLEUM UNIV +1
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Problems solved by technology

However, these instruments cannot simulate the real high temperature and high pressure downhole mechanical environment, cannot comprehensively evaluate the impact of different drilling methods on the stability of the borehole wall, cannot

Method used

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  • Full-size well wall stable simulator

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with accompanying drawing, protection scope of the present invention is not limited to the following:

[0017] Such as figure 1As shown, a full-scale wellbore stability simulator includes a cylindrical sealing rubber sleeve 18 set outside the rock core, a pore pressure permeable layer 58 is arranged between the rock core and the sealing rubber sleeve 18, and the core is infiltrated by pore pressure. The layer 58 is in contact with the sealing rubber sleeve 18, and a caliper 19 is arranged inside the core, and the two ends of the sealing rubber sleeve 18 are respectively installed with an upper axial pressure piston 6 and a lower axial pressure piston 7 that seal the port of the sealing rubber sleeve 18 , the upper axial pressure piston 6 and the lower axial pressure piston 7 are provided with a through hole communicating with the internal space of the sealing rubber sleeve 18, and the upper plunger 8 i...

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Abstract

The invention discloses a full-size well wall stable simulator. The full-size well wall stable simulator comprises a sealing rubber sleeve (18) arranged outside a rock core in a sleeved mode. The two ends of the sealing rubber sleeve (18) are respectively provided with an axial load piston. A well wall visual and imaging system and a stratum sliding wave sound velocity test system are arranged in the axial load pistons. A high-temperature autoclave body (28) is arranged outside the sealing rubber sleeve (18) in a sleeved mode. A confining pressure inlet (29) is connected with a confining pressure adjusting system. The upper axial load piston (6) and the lower axial load piston (7) are connected with a high-pressure pipeline connecting high-pressure mud circulating system and a high-pressure pipeline connecting pore pressure system respectively. The upper axial load piston (6) is further connected with an overburden pressure control system. The full-size well wall stable simulator has the advantages that the subsurface environment can be more vividly simulated, the well wall stable condition can be dynamically evaluated, circulating media can be changed, optimization of a drilling method and a drilling liquid system is facilitated, the near well wall stratum permeability and the rock sound wave characteristic can be comprehensively evaluated, well wall imaging is achieved, observation is more visual, and practicability is high.

Description

technical field [0001] The invention relates to the technical field of simulation research well wall stability experiment evaluation methods in oil and gas field exploration and development, in particular to a full-scale well wall stability simulator. Background technique [0002] The wellbore instability problem is a common problem in the exploration and development of oil and gas fields and has always been a big problem in the petroleum industry. Well wall instability seriously affects the speed, quality and cost of drilling. According to conservative estimates, well wall instability will cause a loss of 500-600 million US dollars to the world oil industry every year, and the drilling fluid will immerse into the oil industry due to well wall instability. In the reservoir, the reservoir is polluted, which has a negative impact on the exploitation of oil and gas fields, which seriously restricts the process of exploration and development. Therefore, maintaining wellbore sta...

Claims

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Application Information

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IPC IPC(8): E21B49/00E21B47/08E21B47/002
Inventor 孟英峰李皋陈一健蒋祖军刘厚彬徐力群
Owner SOUTHWEST PETROLEUM UNIV
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