感应测井几何因子理论及其应用研究

The Induction Logging Geometrical Factor Theory and Its Application.

首先讨论 Doll、Moran、Gianzero和 Born等 4种常用几何因子建立的物理条件及其应用范围 ;然后研究这些几何因子在实际应用中存在的问题。分析表明 ,Doll几何因子仅有理论意义 ,一般情况下需用 Gianzero或 Moran几何因子分析仪器探测特性和测量解释 ;Gianzero和 Moran几何因子的实部可用于描述实际测量信号的实部 ,但虚部并未对应于信号的虚部 ;Born几何因子的实部和虚部近似地反映了非均匀地层对均匀背景地层的扰动 ,所以 。

This paper at first discusses the four kinds of geometrical factors, i.e., Doll's GF, Gianzero's GF ,Moran's GF and Born's GF. Then their applications are investigated in detail. The conclusions show that the Doll's GF has only the theoretical sense; The real part of the Gianzero's and Moran's GF can be used to describe the measured real part, however, imaginary part is not available; the Born's GF describes approximately the heterogeneous disturbance to the homogeneous background formation in the logging measurement, thereby, the key to its use is how to calculate the background conductivity.