摘要
四川盆地嘉陵江组、川东北飞仙关组部分构造储层未裸露于地表,油气保存条件好,气藏天然气产量高,但是气藏地层水却显示出水型、脱硫系数、变异系数等地化参数异常的特征,分析原因是储层的膏盐溶滤使地层水中SO42-含量高所致。
It is found that part reservoirs from both Jialingjiang Formation in Sichuan Basin and Feixianguan Formation in northeastern Sichuan Basin are not exposed.So,hydrocarbon conservation is good and gas yield is high.But formation water from these gas reservoirs appears a water-produced type.In addition,it is featured by some abnormal geochemical behaviors of desulfurization and variation coefficients,resulted from gypsum leaching bringing about SO42-rich in formation water.
出处
《天然气勘探与开发》
2011年第3期21-23,87,共3页
Natural Gas Exploration and Development
关键词
四川盆地
地层水
地球化学特征
膏盐层
嘉陵江组
飞仙关组
Sichuan Basin,formation water,geochemical characteristics,gypsum layer,Jialingjiang Formation,Feixianguan Formation
