威远构造页岩气钻井技术探讨

DRILLING TECHNOLOGIES ON SHALE GAS IN WEIYUAN STRUCTURE

当前常规天然气资源经过长期开采已逐步衰竭,页岩气等非常规天然气资源已引起新的重视。国外页岩气勘探开发表明其生产周期长、单井产量低、产量递减快、资金回收慢、环境污染等问题,是阻碍页岩气藏工业化开发步伐的主要因素。而水平井是页岩气藏成功开发的关键因素,水平井的推广应用加速了页岩气的开发进程。文章以四川油气田威远构造的第一口龙马溪页岩气水平井—威201-H1井为依托,进行页岩气水平井钻井技术的探讨,为今后在该区块的钻井设计和钻井技术提供了一定基础支撑。

Shale gas resource is becoming the focus of oil & gas resource development because of the depletion of conventional resources. Several factors are the obstacle to the industrialized development for shale gas such as long production cycle, low per-well production, rapid depletion of output, slow fund recycle and environmental pollution. Horizontal well technologies are one of the key factors of successful shale gas development and accelerate the development process. Based on the field experiences in Well Wei 201-H1, the first shale gas horizontal well in Longmaxi formation in Weiyuan structure, some key relative technologies have been discussed in this article and would supply technique backup for the drilling planning and technology development in the area.