双频介电测井资料解释方法

为了提高新疆油田介电测井资料的解释质量,在综合考虑了岩石电阻率、介电常数及其频散特性与油气饱和度关系的基础上,构造了频散衰减指数法、饱和度差值法、饱和度连乘法、介电常数频散校正法、径向饱和度差值法、介电常数差值法、组合参数法、电阻率与介电常数比值法和相位差与幅度比交会图法9种定性的油气指示方法,并应用于实际资料的处理。结果表明,9种定性方法均有效果,特别是幅度比与相位差的交会图法效果更为明显,能很好地识别油气层。

Interpretation methodology of double frequency dielectric logging

In order to improve the quality of dielectric logging interpretation, nine qualitative oil and gas indication algorithms, such as the dispersive attenuation index method, the saturation difference method, the multiplication in series of saturation method, the dispersion corrected permittivity method, the difference of saturation in radial direction method, the permittivity difference method, the combined parameters method, the ratio of resistivity to permittivity method and the cross-plot method of amplitude attenuation and phase shift, were presented by considering the effects of conductivity, permittivity and dispersion on saturation. A case study of data processing indicates that all of the algorithms are usable. Especially, the cross- plot method of amplitude attenuation and phase shift is simple and effective, which can identify oil and gas reservoir correctly.