摘要
本文分析了由井眼崩落造成的椭圆形井眼的井壁稳定问题,推导出了椭圆形井眼的地层破坏压力和地层坍塌压力的计算式,结果表明椭圆形井眼的破裂压力和坍塌压力都比圆形井眼大,从而提高了钻井液密度的设计下限。
The article analyzes the problem of the wall stability of elliptical hole arising from hole sloughing, and derives the formula for calculating the formation fracture pressure and formation collapse pressure of elliptical hole. The results indicate the formation fracture pressure and collapse pressure in elliptical hole are higher than that in circular hole. Thus, the design low limit for drilling fluid density are relaxed.
出处
《中国海上油气（工程）》
1996年第5期28-31,共4页
China Offshore Oil and Gas
关键词
椭圆井眼
井壁稳定
地层破裂压力
钻井
elliptical hole, wall stability, formation fracture pressure, formation collapse pressure
