摘要
Abstract
Lost circulation control is the biggest problem in the development process of Fuling shale gas field.According to statistics, different degrees of lost circulation occurred in 67.2% wells during drilling, which has bad affect on the engi-neering quality, the construction progress and the economic benefit;especially the lost circulation of oil-based drilling fluid in the three opening and long horizontal section, which caused serious economic losses.In order to reduce the risk of drill-ing engineering, improve drilling efficiency and reduce drilling cost, starting from the actual situation on site, the statistical analysis was made on drilling leakage, it was thought that in middle-shallow layer were mainly karst cave leakage and frac-ture-cavity type leakage;in Longmaxi formation and Wufeng formation was mainly fracture type leakage.The paper intro-duces the lost circulation prevention and plugging technologies adopted in Fuling shale gas field according to the characteris-tics of each opening and the field application.Along with the development region extension, the geological conditions be-come changing and the leakage is more complicated, the next development direction of lost circulation prevention and plug-ging technologies are put forward with some suggestions.关键词
涪陵页岩气田/井漏/防漏堵漏/油基钻井液Key words
Fuling shale gas field/lost circulation/lost circulation prevention and plugging/oil-based drilling fluid分类
天文与地球科学
