摘要
测量岩石电阻率参数的常用方法有实验室测定、地表小四极测量和电阻率反演,每种方法都有局限性。在没有钻井,不能用井旁电测深资料反演地层电阻率的情况下,可用地表小四极法测定岩石电阻率。但其测定值与井旁电测深资料反演的电阻率值之间存在一个系统差,不能用于大地电磁测深等资料的反演解释。为此,探讨了岩石电阻率和孔隙度之间的关系,提出了一种将地表小四极法观测的岩石电阻率值用孔隙度来标定的方法。结果表明,用此方法标定后的电阻率值与井旁电测深资料反演的电阻率值十分接近。
Resistivity of rock is usually determined by lab measurement, surface small Schlumberger electrode array measurement, or resistivity inversioa Every method has its advantages and disadvantages. If there are no drilling data, the resistivity cannot be determined from electrical sounding data nearby well. In this case, it can be calculated from surface small Schlumberger electrode array measurement. There is a systematic difference between the surface electrode array measurement and the electrical sounding data, which impedes the results to be used in the inversion interpretation of magnetotelluric sounding data. Based on an analysis of the relations between resistivity and porosity, this paper proposed a method to calibrate the resistivity of rock observed from surface small Schlumberger electrode array with porosity. The resulted resistivity was confirmed by the inversion of electrical sounding data nearby well.
出处
《勘探地球物理进展》
2004年第4期256-259,共4页
Progress in Exploration Geophysics
