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储层中隔夹层引起的渗流差异,是影响水驱开发效果的重要因素。隔夹层研究是储层非均质性研究的重要内容。腰滩油田阜一段储集岩以细砂岩为主,孔隙度为9.27%～14.94%,平均为11.4%;渗透率为(0.46～16.09)×10-3μm2,平均为3.38×10-3μm2,属低孔、低-特低渗储层。针对阜一段储层特征,以岩心物性为基础,测井资料为依据,将腰滩油田隔夹层分为两类,即:泥岩夹层和泥质砂岩夹层。在建立隔夹层测井识别标准基础上,对单井隔夹层进行系统识别,并做多井对比,从而得出隔夹层空间分布特征。阜一段储层内隔夹层以泥岩夹层为主,该类夹层主要发育于储层下部;泥质砂岩夹层较少,主要发育于储层上部。隔夹层的井间差异较大,储层非均质性较强。井间对比显示,阜一段储层内隔夹层分布较广的主要有3层,其中3号夹层全区均发育,1号与2号夹层局部发育。
Differences in seepage caused by intercalation in reservoirs are important factors affecting the development of water flooding. Interlayer study is an important part of reservoir heterogeneity research. The reservoirs in the first section of the Futian Section of the Wa-Tan Oilfield are mainly composed of fine sandstones with porosity ranging from 9.27% to 14.94% with an average of 11.4% and permeability ranging from 0.46 to 16.09 × 10-3μm2 with an average of 3.38 × 10-3μm2 Low porosity, low - low permeability reservoir. Aiming at the reservoir characteristics of the first member of Fu, based on the core material properties and well logging data, the interval sandstones in the Waitan Oilfield are divided into two types, ie, intercalated layers of mudstone and shaly sandstone. Based on the establishment of the interception log identification standard, the system identification of single well intercalation and multi-well comparison are made to obtain the spatial distribution characteristics of inter-separated layers. The interbedded interbeds in the first member of the Fu area are dominated by mudstone interbeds, which mainly develop in the lower part of the reservoir. There are few interbedded shale sands, which mainly develop in the upper part of the reservoir. Inter-mezzanine differences between the larger wells, reservoir heterogeneity. Cross-well comparison shows that there are mainly three layers in the first member of the Fu-1 reservoir, in which the whole area of No. 3 is developed and the No. 1 and No. 2 interbed are locally developed.