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METHOD OF EVALUATING CAPABILITY OF DRILLING FLUID TO CONSOLIDATE WELL WALL AND BREAK SURROUNDING ROCK
METHOD OF EVALUATING CAPABILITY OF DRILLING FLUID TO CONSOLIDATE WELL WALL AND BREAK SURROUNDING ROCK
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机译：评估钻井液能力，整合井壁和破裂周围岩石的能力
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摘要
A method of evaluating the capability of a drilling fluid to consolidate a well wall and break surrounding rock. The method comprises: according to the shear strength of sample contact surfaces, the shear strength between the sample contact surfaces after a drilling fluid acts thereon, and a friction angle between the sample contact surfaces after the drilling fluid acts thereon, calculating an amplitude increase in shear strength caused by the drilling fluid and an amplitude increase in friction angle caused by the drilling fluid, and evaluating the capability of the drilling fluid to consolidate a well wall and break surrounding rock according to an increase in a cohesive force between the sample contact surfaces after the drilling fluid acts thereon and the amplitude increase in shear strength caused by the drilling fluid and the amplitude increase in friction angle caused by the drilling fluid. The method of evaluating the capability of a drilling fluid to consolidate a well wall and break surrounding rock achieves quantitative evaluation of the capability of a drilling fluid to improve the shear strength between broken blocks, and provides reliable mechanical parameters for the stability of well walls in fractured strata.
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