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大港王徐庄油田五断块为典型的块状低渗砂岩厚油层油藏 ,每一开发阶段都采取了相应的对策 ,总体上取得了较好的开发效果。该油藏开发初期充分利用天然能量 ,无水采出程度达 7% ,后由于能量不足产量递减 ,及时进行了注水开发 ,但因注采比过大 ,导致高渗透带暴性水淹。经深入研究弄清了剩余油分布规律 ,即 :平面上构造腰部水淹严重 ,构造两翼剩余油富集 ;纵向上油层下部严重水淹 ,油层上部剩余油较多。针对剩余油分布规律 ,钻加密完善井辅以相应的配套措施 ,有效地改善了开发效果 ,增加可采储量 1 6 .7× 1 0 4t。应用物质平衡原理、油藏精细数值模拟成果、油藏工程综合分析方法 ,论述了油藏产能及边水作用特征 ,分析了注水开发过程中含水上升与注水强度的关系 ,研究了非均质性较强的低渗砂岩厚油层剩余油分布规律及挖潜的有效途径
The five fault blocks of Xuangzhuang Oilfield in Dagangwang are typical block oil reservoirs with low permeability sandstone. Corresponding countermeasures have been taken in each stage of development, and a better development result has been achieved overall. In the early stage of development, the reservoir made full use of natural energy, with a water-free degree of 7%. After that, due to insufficient energy, the water injection was developed in time. However, due to the excessive injection-production ratio, the violent flooding of the high permeable belt occurred. After further study, the distribution of remaining oil was clarified, ie, the water flooding in the waist was serious in the plane structure and the remaining oil in the two wings was enriched in the plane. In the longitudinal direction, the serious flooding in the lower part of the oil layer led to more residual oil in the upper part of the oil layer. In view of the distribution of remaining oil, the well-drilled well complemented the corresponding supporting measures, effectively improving the development effect and increasing the recoverable reserves of 16.7 × 10 4 t. Based on the principle of material balance, the result of reservoir numerical simulation and the comprehensive analysis method of reservoir engineering, the characteristics of reservoir productivity and edge water are expounded. The relationship between the rise of water cut and the strength of water injection during the development of water injection is analyzed. The heterogeneity The distribution of remaining oil in strong low permeability sandstone thick reservoirs and the effective way of tapping potential