摘要
为了准确解释低电阻油层的含水饱和度,建立了新的含水饱和度解释模型。新模型不但充分考虑了成岩过程中储层孔隙结构和地层水的变化情况,还考虑了阳离子的交换吸附作用,认为泥质砂岩的导电体积由被束缚水所占据的微孔隙导电体积及有效孔隙中的导电体积组成,2种导电体积中的导电体有不同的导电特性,泥质砂岩的整个导电响应为两者之和。应用该模型对曲堤油田低电阻油层的含水饱和度进行了解释,并将用压汞资料所求的含水饱和度作为参照值进行比较,新模型所计算的含水饱和度与压汞资料所计算的含水饱和度基本一致,取得了较好的效果。
A new water saturation explanation model was put forward in this paper lor accurately interpreting the water saturation in low resistivity oil layers. The change of reservoir pore structure and formation water during the diagenetic stage was considered,as well as exchange and adsorption of positive ions. The conductive volume of argillaceous sandstone is composed of that of mieropore occupied by the irreducible water and sufficient pore. There are some different conductive properties between them and the conductivity correspondence of the argillaceous sandstone is the summation of the above. The model was applied to the water saturation interpretation in low resistivity oil layers in Qudi Oilfield. The value was compared with the water saturation got by mercury intrusion data,and the two values were almost the same.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2008年第6期49-51,共3页
Petroleum Geology and Recovery Efficiency
基金
中国石油化工集团公司重点科技攻关项目"济阳低电阻油层评价及应用技术研究"(P04020)
关键词
含水饱和度
导电机理
解释模型
低电阻油层
曲堤油田
water saturation
mechanism of conductivity
inter-pretation model
low resistivity oil layer
Qudi Oilfield
