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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 .
The distribution of 69 microfacies and sand bodies in the four non-main oil reservoirs of SⅠ, SⅡ, SⅢ and PⅡ in the western part of the southern Sa’nan was studied. One infill well was optimized. The utilization of non-main oil reservoirs in this area was analyzed. Cause and distribution of oil and gas fields. When the oilfield enters the stage of high water cut, the remaining oil distribution is mainly affected by the reservoir heterogeneity, which is caused by the heterogeneity of the oil layers caused by different sedimentary microfacies, resulting in the distribution of residual oil in the vertical and horizontal directions. The imperfect mining system is the main reason for the formation of remaining oil. This result provides a geological basis for tapping the potential of the reservoir and adjusting the well pattern.