亚肯北区砾石层优快钻井技术

Optimized drilling technology in gravel layer in North Yaken

刘晓民 朱亮 钟文建 罗发强 方俊伟

LIU Xiaomin ZHU Liang ZHONG Wenjian LUO Faqiang FANG Junwei

中石化西北油田分公司工程技术研究院，新疆乌鲁木齐　830011 长江大学石油工程学院，湖北武汉　430100 油气钻采工程湖北省重点实验室，湖北武汉　430100

Research Institute of Engineering Technology, Sinopec Northwest Oilfield Company, Urumqi 830011, China Petroleum Engineering School of Yangtze University, Wuhan 430100, China Key Laboratory of Oil and Gas Drilling Project of Hubei Province, Wuhan 430100, China

亚肯北区第四系及库车组上部地层发育巨厚砾石层，导致钻井过程中蹩跳和钻井效率低下，在研究分析该区砾石层特征及钻井难点的基础上，从钻头结构参数和钻具结构及钻进参数等方面优化设计了大尺寸镶齿牙轮钻头及配套钻井工艺。钻井实践表明，亚肯北地区砾石层钻井过程顺利，砾石层段大尺寸牙轮钻头寿命长达404 h，机械钻速提高了84.62％，同时大幅度地减少了钻头使用个数，减少了起下钻时间，提高了钻井作业效率。对亚肯北区钻井提速方案的制定提供了技术指导和借鉴。

The extraordinary thick gravel layer in Quatemary system and upper formation of Kuche member in the North Yaken cause stick-slip and low efficiency during drilling. Based on study and analysis of feature of gravel layer and difficulty of drilling, the thesis optimizes and designs insert roller bit with large size and matched drilling technology in aspects of drilling bit parameter, drilling rig structure and drilling parameter. The drilling practice indicates that the drilling process in gravel layer of the North Yaken is successful. The service life of roller bit with large size in gravel layer is up to 404 hours and rate of penetration is increased by 84.62%. Meanwhile, the number of bits needed is greatly reduced, the time of tripping is decreased, and the efficiency of the drilling is also improved. The study provides guidance and reference for making the scheme to improve the drilling speed in Northern Yaken .