摘要
泥质砂岩“双水模型”只讨论了束缚水和自由水在导电响应上的差异,本文对泥质砂岩介电响应机理进行分析,说明了粘土颗粒表面的束缚水和自由水在介电响应上的差异。另外,在大量实验测量的基础上,计算得到束缚水的复介电常数值,结果表明理论分析和实验测量是一致的。利用上述理论和实验研究结果修正了电磁波测井的解释模型,并将该模型用于实际测井资料解释,求得的冲洗带残余油饱和度(S_(or))和束缚水饱和度(S_(wirr))与取心分析值符合较好。依据上述理论和实验分析提出了电磁波测井资料解释应用的新领域。
Difference between bound water and free water conductivities has been discussed in the litera- ture that concerns dual-water model for shaly sand.In this paper,mechanism of dielectric proper- ties of the water bound to the clay surface in shaly sand is expounded and the difference in dielec- tric properties between bound water and free water is given.Complex dielectric constant of bound water is calculated from a lot of measured data obtained from cores.The experimental results a- gree with theoretical analysis and thereby interpretation model of EPT is sophisticated by taking into account the experimental results.This model has been used in log interpretation in China oil fields.The values of residual hydrocarbon saturation(S_(or))and irreducible water saturation(S_(wirr)) of flushed zone calculated with the above model are in good agreement with the actual core analysis .An expanded application range of EPT is proposed,which is based on the above discussion.
出处
《测井技术》
CAS
CSCD
1993年第6期415-422,共8页
Well Logging Technology
关键词
介电性
测井
泥质砂岩
电磁波测井
dielectric property
residual oil saturation
log interpretation
core analysis
shaly sand
EPT log
