摘要
川东地区高陡背斜构造地质情况复杂,井下压力异常。川东某井在嘉二2钻遇异常高压气层,通过对钻井液密度与气测全烃值和钻井液静止时间相互关系的研究,利用密度、全烃值、钻井液静止时间的相互控制关系,进行欠平衡钻井和起下钻作业,保证了井下安全,取得了显著效果。
The complex geologic characters and abnormal high pressure are existed in high dipped and anticlinal structure in the east of Sichuan. A gas reservoir withabnormal high pressure was encountered in the second section in Jiaer Formation in the region.Having been studied the inter-relationships of drillingfluid density, total hydrocarbon values of gas logging and the rest time of the drilling fluid, they are used in unbalanced drilling and making a trip, the downhole safety are ensured and ed effect are gained.
出处
《断块油气田》
CAS
2000年第3期52-53,共2页
Fault-Block Oil & Gas Field
关键词
欠平衡钻井
超高压地层
高陡构造区
钻井安全
The east of Sichuan, Abnormal high pressure, Unbalance technique, Prevention of blowout, Research and application, Effect