High temperature and high pressure shale well wall stability evaluation device

A technology of high temperature and high pressure, evaluation device, applied in wellbore/well components, earthwork drilling and other directions, can solve the problem of not being able to fully reflect the influence of wellbore instability, and achieve improved simplicity and accuracy, simple structure , good repeatability

Inactive Publication Date: 2013-06-19
YANGTZE UNIVERSITY
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Problems solved by technology

According to the wellbore stability model of the film effect, a shale hydration/mechanical coupling experimental device, a shale film efficiency tester, a high-temperature and high-pressure wellbore stability tester, a core soaking device, and a high-temperature and high-pressure wellbore wall stability tester have been developed. V

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  • High temperature and high pressure shale well wall stability evaluation device

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Embodiment Construction

[0016] The present invention consists of a well wall simulation device, an outlet pressure sensor 9, an inlet pressure sensor 10, a triaxial pressure chamber 11, a pressure chamber heater 12, a liquid outlet reversing valve 13, a mud container 14, a mud container heater 15, a piston container 16, Advection pump 17, electric metering pump 18, confining pressure sensor 19, mud pump 20, liquid inlet reversing valve 21, and data acquisition and processing system.

[0017] The well wall simulation device is composed of a well wall heater 1, a well wall outer cylinder 2, an ultrasonic probe 3, a well wall inner cylinder 4, a simulated well wall 5, an ultrasonic probe rod 6, a data acquisition connector 7, and a rotary lifter 8 A well wall heater 1 is installed outside the well wall outer cylinder 2; a well wall inner cylinder 3 is installed in the well wall outer cylinder 2; a simulated well wall 5 is installed in the well wall inner cylinder 3; There is an inlet of drilling circula...

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Abstract

The invention relates to a high temperature and high pressure shale well wall stability evaluation device and belongs to the technical field of evaluation devices of test of hydrocarbon reservoir protection in the process of petroleum exploration and development. The high temperature and high pressure shale well wall stability evaluation device is characterized by comprising a well wall analog device, a triaxial cell (11), a mud container (14), a piston container (16), a constant-flux pump (17), an electric metering pump (18), a mud pump (20) and a data collection processing system. The high temperature and high pressure shale well wall stability evaluation device can carry out drilling fluid washing damage test on an analog well wall on the condition that temperature, pressure and circulating fluid flow are simulated. An imaging method is used for simulating degrees of hole enlargement, hole shrinkage and collapse after the well wall is eroded by external liquid, microwaves are used for measuring the degrees, and therefore the washing degrees of the well wall and wall building situation can be observed and recorded in real time. A new method for comprehensively evaluating influence of the drilling fluid and completion fluid on instability and collapse degree of the well wall is provided. Besides, the high temperature and high pressure shale well wall stability evaluation device has the advantages of being good in repeatability, simple in structure, convenient to operate, stable in performance and the like.

Description

Technical field: [0001] The invention relates to a high-temperature and high-pressure mud shale well wall stability evaluation device, which belongs to the technical field of experimental evaluation equipment for oil and gas layer protection in the process of petroleum exploration and development. Background technique: [0002] The wellbore instability problem is a worldwide problem in the oil drilling process, especially the downhole complex situation and other downhole accidents caused by it are extremely harmful to the drilling engineering. Wellbore instability seriously affects the speed, quality and cost of drilling, and it will also pollute the reservoir, adversely affect oil testing and oil and gas development, and even delay the exploration and development process, affecting the comprehensive economic benefits of oil and gas drilling and development. Therefore, preventing wellbore instability is a systematic project throughout the exploration and development of oil a...

Claims

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Application Information

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IPC IPC(8): E21B49/00
Inventor 余维初罗跃吴志坚余钢
Owner YANGTZE UNIVERSITY
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