基于测井曲线相关系数及包络面积的流体识别方法

摘要

The correlation coefficient and the envelope area of porosity logging and resistivity logging are very sensitive to response characteristics of the reservoir.Relative to water,the correlation coefficient of oil layer signifi-cantly increases,the envelope area also increases significantly.Using the reverse variation characteristics of the correlation coefficient and the envelope area,after reasonable scaling in the same curve way, the normalization of the correlation coefficient and the envelope area,can form clear image of envelope curve.By computing the correla-tion coefficient and the envelope area,combining with test data,the quantitative relationship chart identifing oil and water layer can be received.The method is used in mudstone reservoir of Y Oilfield,and receives a good effect.It widens the wags of using logging data to identify oil layers.%孔隙度测井及电阻率测井的相关系数及其包络面积大小对储层的响应特征非常敏感,相对于水层,油层相关系数的会明显增大,包络面积也会明显增大.利用相关系数和包络面积的这一反向变化特征,在同一曲线道中合理刻度归一化后的相关系数和包络面积曲线,可以形成明显的镜像包络线.通过计算相关系数及包络面积并结合试油试采数据可以得到用于定量识别油水层的关系图版.该方法在油砂山油田第三系砂泥岩储层的油层识别中,取得了良好的判识效果,拓宽了工区利用测井资料识别复杂储层流体性质的途径.