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影响压差卡钻的因素有:钻井液液柱压力与地层孔隙压力的差;渗透性地层表面形成的泥饼及其摩阻系数;钻具与井壁的接触面积;钻具在井下的静止时间等。本文通过对华北油田1986～1995年间134口压差卡钻井统计分析,从宏观上找出了导致华北油田压差卡钻的主要因素,并力求给出定量的数据,提出了华北油田预防压差卡钻的具体措施。
The factors that affect the differential sticking are as follows: the difference between drilling fluid liquid column pressure and formation pore pressure; the mud cake formed on the surface of permeable formation and its friction coefficient; the contact area between drilling tool and shaft wall; Time and so on. Based on the statistical analysis of 134 differential pressure card drilling wells in Huabei Oilfield during 1986-1995, the main factors that led to the differential pressure sticking in Huabei Oilfield are found out, and the quantitative data are given. The pressure drop prevention in Huabei Oilfield Card specific measures to drill.