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大天池构造带位于川东高陡构造区，地腹形态复杂，地层倾角大，产层多，具有喷，漏，塌，卡，斜，毒等多种特性。１９９２年 ，四川石油管理局川东钻探公司在构造带先后开钻１０口井平均设计井深达４９５１ｍ，实际完钻井深平均４８５０ｍ，是川东历年平均完钻井深之最。针对该构造带复杂的地质特点和深井钻井难点，综合配套推广应用了喷射钻井，井身质量控制、平衡钻进与井控、综合治漏、优化井身结构设计，井下动力钻具带ＢＤＣ钻

APPLYING OVERALL MATCHING TECHNIQUE OF DRILLING DEEP WELL TO SPEED UP THE EXPLORATION AND DEVELOPMENT IN DATIANCHI STRUCTURM BELT

Datianchi structural belt situates in high and steep district where subterranean forms are complicated,and the formation dip angle is large, with lots of payzones. Many events such as blowing out, leakage, collapse,sticking, inclination and toxicity are often happened. Chuandong Drilling and Exploring Company of SPA has drilled over ten wells since 1992. The average designed depth of the wells has reached at 4 95lm,and the actual completed well average depth was 4 850m which is the highest in these years. In view of the situations of complicated geological characteristics and deep well drilling problems, an overall matching technique is applicated including jet drilling,wellbore quality control, balanced drilling,anti-collapse, optimized well bore design, downhole dynamic drilling units with BDC bits,premium drilling fluid,directional coring,completing fluid for protecting gas formation,deep well cementing etc. At the same time,it is tested to offset well location so as to help drilling reach the target by using formation selfdeflection.