摘要
鄂尔多斯盆地伊陕斜坡GHW2井是在陕西府谷庙沟门施工的一口页岩气探井,地层主要为千5、盒8、山西组、太原组、本溪组,钻进过程中坍塌掉块、破碎严重。针对现场破碎、坍塌掉块及水敏性地层钻探遇到的主要难题,研制了双聚防塌冲洗液体系。该体系具有护壁性、抑制性和胶结性。通过在GHW2井中的应用,取得了较好的护壁、护心效果,有效地保证了该项目的顺利施工。
GHW2 in Ordos basin is an exploration well for shale gas, serious collapsing, rock falling and breaking occurred in the drilling process.According to these conditions, bi-polymer anti-caving fluid system was developed, which has wall protection, inhibitory and cementation properties, and is mainly aiming at the main difficulties encountered in drilling con-struction in breaking, collapsing, block falling and water sensitive formations.This system was applied in GHW2 with good effects of wall protection and core integrity.
出处
《探矿工程（岩土钻掘工程）》
2015年第5期12-15,共4页
Exploration Engineering:Rock & Soil Drilling and Tunneling
基金
中国地质调查局地质矿产调查评价项目"重点成矿区带浅层钻探技术研发与应用示范"之"重点成矿带钻探冲洗液关键技术研究与示范"(编号:12120113097400)
关键词
页岩气
钻探
双聚防塌钻井液体系
抑制性
井壁稳定
shale gas
drilling
bi-polymer anti-caving drilling fluid system
inhibition
borehole wall stability
