Experimental device and method for simulating interaction between mudstone and drilling fluid under formation conditions
A technology for simulating experimental devices and formation conditions, applied to measuring devices, applying stable tension/pressure to test material strength, instruments, etc., can solve problems such as large drilling fluid errors, save costs, ensure safety, and avoid complicated drilling The effect of the accident
Active Publication Date: 2019-04-30
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
Utilizing the influence of drilling fluid measured at non-formation temperature on mudstone deformation and failure parameters for wellbore stability analysis and drilling fluid design may produce large errors
Method used
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[0051] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0052] Such as figure 1 As shown, the experimental device for measuring the interaction between mudstone and drilling fluid under high temperature and high pressure mentioned in the present invention mainly includes: high temperature autoclave 1, drilling fluid system 2, confining pressure system 3, computer system 4, heating system 5, the second A vent valve 7, a second vent valve 12, and a temperature control box 17.
[0053] One end of the drilling fluid system 2 is connected to the computer system 4 through the first data transmission line 9, and is controlled by the computer system 4; the other end of the drilling fluid system 2 passes through the heating syste...
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Abstract
The invention relates to an experimental device and method for simulating the interaction between mudstone and drilling fluid under formation conditions. The computer system is respectively connected with the drilling fluid system, the confining pressure system, the high temperature autoclave and the sensor system; the high temperature and autoclave is equipped with a confining pressure vent valve and a drilling fluid vent valve; the other end of the confining pressure system is connected with the high temperature and autoclave; the drilling fluid system The other end is connected to the high temperature and autoclave; the heating system is wrapped on the outside of the high temperature and autoclave; the temperature control box is connected to the inside and outside of the high temperature and autoclave respectively. The invention solves the problem of a simulated experimental device for the interaction between mudstone and drilling fluid and the testing of rock mechanical parameters under the condition of high temperature and high pressure of the formation, and is used to obtain the influence of the drilling fluid on the mechanical properties of the mudstone in the environment of high temperature and high pressure of the formation, and provides the means for on-site drilling. Experimental data to guide the drilling of oil and gas and geothermal resources.
Description
technical field [0001] The invention relates to an oilfield rock mechanics simulation experiment device and method, in particular to a mudstone and drilling fluid interaction simulation experiment device and method under formation conditions. Background technique [0002] At present, oil fields such as Tarim and Xinjiang are implementing ultra-deep well drilling projects. The bottom hole temperature of many wells is extremely high. At the same time, the bottom hole temperature of some geothermal wells can reach 400 ℃, and the formation pressure is high. In the process of deep well drilling, due to the existence of geothermal gradient and pressure gradient, the deeper the wellbore is, the higher the temperature and pressure in the wellbore will become. High temperature and high pressure will have a great impact on the mechanical properties of mudstone, and under high temperature conditions, the chemical properties of drilling fluid will change, affecting the interaction betwe...
Claims
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IPC IPC(8): G01N3/18G01N3/02
CPCG01N3/02G01N3/18G01N2203/0019G01N2203/0048G01N2203/0226G01N2203/0232
Inventor 闫传梁刘钰文程远方丁吉平滕飞张怀文李庆超
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)