摘要
从水样pH值、无机阴阳离子匹配状况以及水中Cl-、Ca2+、Mg2+含量等多项指标,分析了地层水与残酸、钻井液的混合液的特征,总结归纳出了用于生产监测中,判断所取地层水样是否正常的特征指标,可用于判断酸化后或使用钻井液进行相关作业后的液体返排是否彻底,所取水样是否能代表正常地层水等。目前,该判识方法已在川渝油气田的多个油气藏得到了广泛应用。
In this study,the characteristics of the mixed liquid of formation water with residual acid and drilling fluid are analyzed through some indices,such as the water sample pH value,the matching status of inorganic cation and anion,and the content of Cl-,Ca2+ and Mg2+ in water.A characteristic index that judges whether the formation-water sample is normal is summed up for production monitoring.The index can also be used to judge whether the liquid flowback is complete after acidizing or corresponding operations using drilling fluid,and whether the obtained water sample can represent normal formation water.At present,this method is widely applied to many oil and gas reservoirs in Sichuan-Chongqing oil and gasfield.
出处
《天然气勘探与开发》
2011年第2期62-64,83,共3页
Natural Gas Exploration and Development
关键词
地层水
残酸
钻井液
PH值
水型
阴阳离子含量
formation water,residual acid,drilling fluid,pH value,water type,content of cation and anion
