萨南西部萨、葡非主力油层剩余油的分布

Study of remaining oil distribution in S.P. non-main pay west of southern Saertu

研究了萨南西部SⅠ ,SⅡ ,SⅢ ,PⅡ 4个非主力油层组 6 9个沉积单元微相及砂体的分布 ,优选一次加密井 ,分析了该区非主力油层的动用状况 ,剩余油的成因及分布 ;油田进入高含水阶段 ,剩余油分布主要受储层非均质的影响 ,表现在不同沉积微相引起了油层非均质 ,造成剩余油在平面上、纵向上的分布差异 ;注采系统不完善是剩余油形成的主要原因 ,此成果为油层挖潜、井网调整提供了地质依据 .

In this paper, according to the study of distribution of sedimentary microfacies and sand bodies of S.P Non-main Pay, 4 development reserviors, 69 sedimentary units, and the selection of intermediate pattern, we analysized the performance, formation and distribution of remaining oil distribution, and concluded that the remaining oil distribution is mainly affected by inhomogeneity of the reservoir when the oilfield entered the stage with high water content. In this case, sedimentary microfacies controls the sedimentary inhomogeneity, which cause the diversities of remaining oil's distribution in horizontal and vertical directions, so the main cause of remaining oil lies in the imperfections of the system of injection and extraction, which provides the geology fundation to further potentiality tapping of reserviors and adjustment of pattern.