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Systems and methods to identify and inhibit spider web borehole failure in hydrocarbon wells
Systems and methods to identify and inhibit spider web borehole failure in hydrocarbon wells
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机译:识别和抑制油气井中蜘蛛网钻孔失败的系统和方法
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摘要
Determining, based on asymmetric spalling of rock at a wall of a wellbore of a hydrocarbon well, that the wellbore is experiencing a spider web borehole failure (SWBF); and in response to the determination: generating a forward model of rock strength for the well (including a rock strength reduction function defining a rock strength reduction factor (r) as a function of angular width of a borehole failure (W)); determining an angular width of the SWBF (WSWBF); determining, based on application of the angular width of the SWBF (WSWBF) to the rock strength reduction function, a rock strength reduction factor (r) for the well; determining, based on the rock strength reduction factor (r) and an unconfined compressive strength of intact rock (Co), an unconfined compressive strength of fractured rock (Cfrm); and operating the well based on the unconfined compressive strength of fractured rock (Cfrm).
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