地质统计分析方法在鲕滩储层预测中的应用

Application of geostatistical analysis in prediction of oolitic reservoir

四川石油管理局地调处成都物探研究中心,四川成都 610212

Chengdu Geophysical Research Center, Sichuan Geophysical Company, Sichuan Petroleum Administration, Chengdu 610212, China

地质统计分析方法实现了地震属性到储层岩石物性参数的转换,可以获得可靠的预测结果。针对LJZ构造鲕滩储层层多、层薄、纵横向分布不均匀等特点,利用地质统计分析方法进行了飞仙关组鲕滩储层定量预测。提取了均方根振幅和平均振幅等6种地震属性参数,选取相关性高的属性参数与井数据建立统计关系,经过内插外推得到井间物性参数平面图。地质统计分析方法预测的鲕滩储层厚度及孔隙度与井资料吻合程度较高,储层的平面分布与速度反演方法预测的鲕滩储层横向分布规律一致。

Geostatistical analysis can be used to transferseismic attributes into petrophysical parameters ofreservoirs. According to the characteristics of ooliticreservoir in LJZ structure, the author adoptedgeostatistical method to predict oolitic reservoirs ofFeixianguan formation quantitatively. Six seismic at-tributes such as RMS amplitude and mean amplitudeare extracted and used to correlate with parameters from wells. The areal distribution of physical proper-ties is determined by interpolation and extrapolationbased on the statistical relationship between seismicattributes and logging data. The reservoir thicknessand porosity resulted from geostatictical methodmatch well with those in wells, and the lateral distri-bution of oolitic reservoir is in good agreement withthe results of velocity inversion.