摘要
双水模型把泥质砂岩的导电性看成是孔隙中粘土附近的粘土水和距粘土表面较远的自由水2种导电成份的并联结果。但是,在分析混合物的导电性时应考虑导电成份结构的影响,不宜只按并联或串联处理;泥质砂岩的导电性应是孔隙中的粘土水和自由水2种导电成份按其结构特性的混合联结(称为“混联”)的结果。应用由2种导体成份组成的整体各向同性混合物电导率公式导出了双水混联模型的等效地层水电导率新公式。用新、旧公式计算的泥质砂岩电导率与实验数据的对比表明新公式更为准确,建议在测井解释中应用。
The dual water model considered the conductivity ot shaly sand as a parallel connecnon result of conductive free water and clay water in pores. However, the structural effect of conductive components should be considered in analyzing mixture conductivity, a mere consideration of parallel or series connection is not perfect; and the conductivity of shaly sand should be some ＂mixture connection＂ result of free water and clay water according to its structural characteristic. A new formula on equivalent formation water conductivity of dual water mixture connection model is deduced from the conductivity formula for wholly isotropic mixture composed of two kinds of conductor pellets. A comparison between shaly sand conductivities calculated with the old or new formula and experimental data shows that the new formula is more accurate than old one. The new formula is advised to use in logging interpretation.
出处
《测井技术》
CAS
CSCD
2007年第1期1-3,共3页
Well Logging Technology
关键词
电法测井
泥质砂岩
双水模型
混合物
电导率
electric logging
shaly sand
dual water model
mixture
conductivity
