冀东油田复杂地层安全高效钻井技术研究

STUDY ON SAFE AND HIGH EFFICIENT DRILLING TECHNIC IN BAD GROUND OF JIDONG OILFIELD

南堡凹陷是冀东油田的主力生油区,其馆陶组底部普遍存在两种复杂地层:部分强烈蚀变的玄武岩地层和胶结性极差的底砾岩地层。玄武岩地层的井壁稳定性和快速钻进问题以及底砾岩地层的快速钻进和钻头安全使用问题是直接影响钻井安全、效率和成本的重要问题。针对这一系列钻井问题,在对冀东油田大量的钻井、地质资料的深入理解的基础上,通过深入分析,提出解决这些复杂问题的一些措施,并通过理论或实践验证了其有效性。

Nanbao depressed area is the most important oil production area in Jidong Oilfield.There are two complex layers which are badly alterative basalt and weakly consolidated basal conglomerate formation at the bottom of Guantao Group in Nanpu Hallow.Hole stability and faster drilling in the basalt layer and faster drilling and safety of the bit in the basal conglomerate layer will influence the safety,efficiency and cost of drilling directly.On the based of the analysis of drilling and geologic information in Jidong Oilfield,this thesis put forward some measures to resolve these problems,and these measures were proved by field application.