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针对文15块沙三上特高含水油藏精细描述及调整挖潜工作,通过分析反映该区不同类型油藏特征的多种参数及评价指标,利用储层流动层带指标、储能参数、单渗砂层厚度、油层有效厚度、砂地比、孔隙度、泥质含量、渗透率及其他非均质性定量评价指标,在该区沙三上油藏建立起综合评价参数、标准和权系数。利用灰色理论综合上述储层渗流、储集特点及含油气与非均质的多种信息,对该区目的层段储层进行了综合评价和分类描述。从不同角度分析并阐明了该区不同类型储层的静态质量,有效地控制和划分油藏开发的主力层位以及类型、质量好的优质储层规模及范围。通过沙三上22层段储层综合评价与剩余油饱和度分布对比分析,阐明了剩余油集中富集在优质储层分布范围的主要断裂边缘附近、断裂遮挡注采不完善地区或断鼻上倾方向。这些主力油层中静态质量好的Ⅰ、Ⅱ类储层在特高含水期油水动态变化受断层封闭遮挡及油层起伏油水分异控制,油层动用差以致不动用,造成剩余油呈较大规模集中分布富集,形成了该区油田持续开发和进一步挖潜的主要方向。
Aiming at the fine description and adjustment and tapping work of the super high water-cut reservoir in the third sand block of Wen 15, by analyzing various parameters and evaluation indexes reflecting the characteristics of different types of reservoirs in this area, The thickness, the effective thickness of sand, the ratio of sand, porosity, shale content, permeability and other inhomogeneities. The comprehensive evaluation parameters, standard and weight coefficient were established in this reservoir. Based on the gray theory, the above reservoir seepage, reservoir characteristics and various information including oil and gas and heterogeneity are integrated to make a comprehensive evaluation and classification of the reservoir in the target zone. Analyzed and clarified the static quality of different types of reservoirs from different perspectives, effectively controlled and classified the main strata of reservoir development as well as the type and quality of high-quality reservoir scale and scope. Based on the comparative analysis of reservoir comprehensive evaluation and residual oil saturation distribution in the 22 stratum of Sha 3, it is elucidated that the remaining oil concentrated in the vicinity of the main fault edge of the distribution range of high quality reservoirs, Tilt direction. The static and good quality reservoirs of type I and type II in the main reservoirs are affected by the sealing and blocking of faults and the oil-water difference control of the oil layers in the ultra-high water-cut stage. The poor utilization of the reservoirs results in a large-scale distribution of remaining oil Enrichment, forming the main direction of the continuous development of oilfields in the area and further tapping the potential.