黔西地区石炭系页岩气钻井工程难点与对策  

Difficulties and countermeasures of Carboniferous shale gas drilling engineering in western Guizhou

作　　者：王虎 迟焕鹏 王胜建[2,3] 岳伟民 孟祥龙[2,3] WANG Hu;CHI Huanpeng;WANG Shengjian;YUE Weimin;MENG Xianglong(Xinjiang Yaxin Coalbed Methane Investment and Development(Group)Co.,Ltd.,Urumqi 830063,China;Oil and Gas Survey,China Geological Survey,Beijing 100083,China;Key Laboratory of Unconventional Oil&Gas,China Geological Survey,Beijing 100083,China)

机构地区：[1]新疆亚新煤层气投资开发(集团)有限责任公司,新疆乌鲁木齐830063 [2]中国地质调查局油气资源调查中心,北京100083 [3]中国地质调查局非常规油气地质重点实验室,北京100083

出　　处：《断块油气田》2024年第5期909-915,共7页Fault-Block Oil & Gas Field

基　　金：中国地质调查局油气资源调查中心科创基金项目“深部煤岩力学特性及水力压裂参数优化研究”(2023YC07);中国地质调查局项目“重点参数井含油气参数测试”(DD20201172)。

摘　　要：黔西地区石炭系地质条件复杂,工程风险和难点多,导致钻探工作面临很大挑战。根据该地区获得的地质资料,结合区内多口页岩气井的钻井工程实践,分析该地区存在以下钻井工程难点:浅表层溶洞、裂缝发育导致钻井漏失严重,打屋坝组目的层泥页岩段井壁易垮塌失稳,气层和裂缝发育层共存,部分地区含硫化氢,安全钻进风险高等。针对以上难点,提出了钻前浅表溶洞工程地球物理探测、“三开”井身结构优化设计、钻井设备优选和优快钻井等技术或方法。最后建议开展石炭系打屋坝组“漏、溢、塌”耦合作用机理研究,形成黔西地区页岩气钻井适应性工程技术体系,为实现该地区页岩气高效勘探开发提供技术支撑。Due to the complex geological conditions in the Carboniferous of western Guizhou,many risks and difficulties in drilling engineering pose great challenges to drilling work.Based on the geological data obtained in the region and combined with the practice of drilling engineering of several shale gas wells in the region,difficulties of drilling engineering in the region have been summarized as follows.Serious drilling lost circulation due to the development of shallow karst caves and fractures,the wellbore of shale section of the target layer of Dawuba Formation is prone to collapse and instability,gas layer and fracture development layer coexist,some areas contain hydrogen sulfide and the risk of safe drilling is high.To address the above difficulties,technologies or methods such as engineering-geophysical exploration of shallow karst cave before drilling,"three spud"optimization design of casing program,selection of preferred drilling equipment,and fast and efficient drilling were proposed.Finally,it is suggested to conduct research on the coupling mechanism of"lost circulation,well kick,and collapse"to form an adaptive engineering technology system in western Guizhou in order to provide technical support for achieving efficient exploration and development of shale gas in this area.

关 键 词：页岩气 井漏 井壁稳定 井身结构 跟管钻井 石炭系 

分 类 号：TE28[石油与天然气工程—油气井工程]