川东高陡构造钻井工艺的合理配套探讨

A DISCUSSION ON THE REASONABLE MATCHING OF DRILLING TECHNOLOGY FOR THE HIGH STEEP STRUCTURES IN EAST SICHUAN

川东地区高陡构造分布广、勘探前景可观，但复杂情况众多。文中根据高陡构造的地质构造特点和钻井地质特点，将高陡构造分为主体构造（Ⅰ类）和翼部潜伏构造（Ⅱ类）两类，推演其钻井工艺的合理技术配套方案。提出Ⅰ类构造应实施以清水强钻、钻具安全、深下技术套管和钻直井技术为主的配套技术，Ⅱ类构造则应实施利用地层自然造斜规律钻中靶井、综合治理井眼失稳、高效暂堵与保护产层、深部高压地层的井下动力钻具配金刚石钻头快速钻进技术。希望对川东地区今后的钻井工作起到一定的参考作用。

In East Sichuan,the high steep structures are widespread,their exploration prospects being considerable ,but the geological conditions are complex.According to the properties of geological structure and drilling geology of the high steep structures,they are divided into two types,i.e.the major structures (Type Ⅰ) and flank buried structures(Type Ⅱ),and their reasonable technique matching plans of drilling technology are deduced respectively.It is proposed that the matching techniques of the water pressurization drilling,drilling tool safeguard,deepening protective casing and drilling straight hole are mainly carried out for Type Ⅰ structures,and those of the drilling medium target wells by use of formation′s natural deflecting rule,comprehensively harnessing borehole destabilizing,highly efficient temporary plugging and a rapid drilling technique by downhole power drilling tools with a diamond bit for protecting payzones and deep high pressure formations are put into effect for Type Ⅱ structures,which will play a reference role in drilling in this region in the future.