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王庄油田位于东营凹陷北部陡坡带西段 ,沙三上亚段油藏为受边、底水影响的地层 岩性油藏 ,主体部分是郑 40 8砂砾岩体。该砂砾岩体虽具有中高孔、中高渗储集层特点 ,但存在较严重的非均质性和敏感性问题 ,平面以北部非均质性最强 ,纵向以上部非均质性更严重。以沉积学标志为基础 ,结合测井相及地震相等方法 ,分析认为郑 40 8砂砾岩体为近源快速堆积的扇三角洲相砂砾岩体 ,成分成熟度和结构成熟度都低 ,成岩作用弱 ,以原生孔隙为主。对油田主力区 5口取心井 65块 (次 )沙三上亚段岩心进行流动实验和辅助实验 ,结果是储集层胶结疏松 ,黏土矿物主要是不稳定的伊 /蒙混层矿物 ,敏感性损害主要是中—强水敏性 ,其次是中—弱酸敏性和碱敏性。因此 ,王庄油田注水开发时 ,要着重加强防水敏工作。图 2参 2 (王孝陵摘 )
Wangzhuang Oilfield is located in the western part of the steep slope belt in the northern part of Dongying Sag. The upper third member of the third member of the Shahejie Formation is lithostratigraphic reservoirs that are affected by the edge and bottom water. The main part of the reservoir is Zheng 40 8 conglomerate body. The sandy conglomerate has the characteristics of medium-high porosity and medium-high permeability reservoirs, but has serious problems of heterogeneity and sensitivity. The northern part of the plane has the strongest heterogeneity and the vertical part of the upper part has more serious heterogeneity. Based on the sedimentology log, combined with log facies and seismic equivalent methods, it is considered that the Zheng 40 8 conglomerate body is a facies-rich deltaic sandstone conglomerate with rapid maturity and low structural maturity and weak diagenesis , Mainly to primary pores. The flow experiments and the auxiliary experiments on the core of Shasan-Shangshang section of 65 well cores in the main area of the oilfield are carried out. The results show that the reservoirs are loosely cemented and the clay minerals are mainly unstable, The damage is mainly medium-strong water sensitivity, followed by medium-weak acid sensitivity and alkali sensitivity. Therefore, Wangzhuang oilfield water development, we should focus on strengthening water-sensitive work. Figure 2 Senate 2 (Wang Xiaoling pick)