特殊岩性岩石电性参数频散特性试验研究

Experiment on Rock-electrical Parameter Dispersion Characteristics of Special Lithology

泥质砂岩岩石电性参数频散特性试验研究目前已经较为成熟,而对于特殊岩性的岩石电性参数频散特性的试验研究却开展非常少。通过特殊岩性的岩石电性参数频散特性试验分析可以看出,花岗岩、粗面岩、碳酸盐岩的频散特性与泥质砂岩一致,受含油性影响较大,并且不同岩性的极值点(截止频率)不同,花岗岩在100kHz左右、粗面岩在4kHz左右、碳酸盐岩在1kHz左右。页岩的频散特性较弱,与泥岩的频散特性一致。

The experimental study on the rock-electrical parameter dispersion characteristics of argillaceous sandstone was relatively mature,but for the study on the rock-electrical parameter dispersion characteristics of the special lithology was very few.The experiment results of rock-electrical parameter dispersion characteristics of the special lithology indicate that the dispersion characteristics of granite,trachyte and carbonate rocks are consistent with argillaceous sandstones,it is affected greatly by petroliferous,and different lithologyies have different extreme points(cut-off frequency),the extreme point of the granite is about 100 kHz,trachyte is about 4kHz,carbonate rock is about1 kHz.The dispersion characteristics of shale are weak,it is consistent with that of mudstone.