储层横向预测技术在尼日利亚Stubb Creek油田的应用

Application of reservoir lateral prediction technology in Stubb Creek oilfield of Nigeria

Stubb Creek油田研究工区面积42 km2,研究层位是阿格巴达组的C3、C7、C9、D1、D3、D5、D8小层。根据已钻探的4口井和现有的认识成果,进行了测井曲线标准化、井震标定、体系域的层序划分,进行了岩石物理和岩相物理的研究,通过多种地震相结合单井相,刻画出了上述7层的有利相带。用支持向量机技术,进行了泥质含量的分频反演,通过砂岩的泥质含量门槛值计算了上述7层的砂体厚度,筛选了C9、D3两个有利相带。在有利相带控制下雕刻了过井砂体的顶面构造图和砂体厚度等值线图,并进行了综合评价。

Stubb Creek oilfield has an area of 42 km2,and the research layers are C3,C7,C9,D1,D3,D5 and D8in Agbada formation.According to the existing 4 drilled wells and the present understanding of achievements,to carry out well log normalization,well-to-seismic calibration and the sequence division of systems tracts,and the studies of rockphysics and lithofacies.Through various seismic facies and in combination with single well facies,to describe favorable facies belt of the seven layers mentioned above.By using support vector machine(SVM)technology to carry out frequency division inversion of shale content.With the sandstone shale content threshold value to calculate the sand body thickness of the above 7 layers.C9 and D3 were screened to be the two favorable facies belt.Under the control of favorable facies belt,top structure map through sand body and contour map of sand body thickness were carved and then a comprehensive evaluation was carried out.