高频等参数感应测井的井洞、井眼和侵入影响分析

Analyses on the effects of cave,borehole and invasion on the VIKIZ curves

针对高频等参数感应测井仪,分别计算分析了井洞、井眼和侵入对其测井响应的影响,发现这些影响与传统感应和阵列感应测井不一样。文章计算给出了各种参数的影响特性,利用相位几何因子理论解释了井洞影响造成的测井曲线上冲和下冲异常现象利用实际测井曲线的井洞影响分析验证了井洞影响数值模拟的正确性。这些结果有助于高频等参数感应测井数据的解释。

The cave,borehole and invasion effects on the VIKIZ curves are calculated and analyzed.The results show that these effects are different from the traditional induction and array induction logging.The effect characteristics of various parameters are computed.The abnormal phenomenon with overshoot and undershoot in logging curves which due to cave effect is explained by the phase geometric factor theory.The field logging curves validate the correctness of the numerical simulation of the cave effect.These results are very useful to the logging interpretation for VIKIZ data.