钙基聚磺钻井液在南页1井的应用  

Application of calcium-based polysulfonated drilling fluid in Nanye 1 well

作　　者：谭晓峰[1] 任艳增[1] 张毅[1] TAN Xiao-f eng;REN Yan-zeng;ZHANG Yi(Dagang Oilfield Petroleum Engineering Research Institute,Tianjin 300280,China)

机构地区：[1]大港油田石油工程研究院,天津300280

出　　处：《精细与专用化学品》2018年第11期31-33,共3页Fine and Specialty Chemicals

摘　　要：南页1井是四川盆地川东南构造带南川断鼻上的一口页岩气预探井,针对地层易坍塌以及存在微裂缝、石膏层、煤层等较复杂的特性,优化了钻井液体系,即在聚磺钻井液体系的基础上引入钙离子,变成钙基聚磺钻井液体系。该体系在南页1井的应用表明,体系高温稳定性强、抑制防塌能力好、流变性能优良,有效解决了页岩气水基钻井液井壁失稳问题以及盐膏侵、酸性气体侵等问题。Nanye 1 well is a pre-exploration well for shale gas in the fault nose of nanchuan structure belt in SICHUAN basin.In view of the formation prone to collapse and the existence of micro-cracks,gypsum,coal and other complex characteristics,optimized the drilling fluid system.In other words,calcium ions are introduced on the basis of the polysulfonated drilling fluid system to become a calcium based polysulfonated drilling fluid system.The application of the system in Nanye 1 well shows that the system has strong stability at high temperature,good antisloughing ability and excellent rheological property,and it effectively solves the problems of borehole instability of water-based drilling fluid of shale gas,salt-paste invasion and acid gas invasion.

关 键 词：页岩气 钙基聚磺钻井液体系 抑制性 井壁稳定 

分 类 号：TE254[石油与天然气工程—油气井工程]