岩性油气藏 ›› 2023, Vol. 35 ›› Issue (2): 159168.doi: 10.12108/yxyqc.20230215
• 石油工程与油气田开发 • 上一篇
姚秀田, 王超, 闫森, 王明鹏, 李婉
YAO Xiutian, WANG Chao, YAN Sen, WANG Mingpeng, LI Wan
摘要: 储层敏感性分析是判别储层伤害程度的重要手段,对后期高效开发和剩余油挖潜具有重要意义。选取渤海湾盆地沾化凹陷垦西油田新近系馆陶组储层岩心样品,结合薄片观察、X射线衍射分析及压汞测试、流动水驱实验,对馆陶组上段和下段储层伤害指数和敏感性特征进行了分析。研究结果表明:①渤海湾盆地沾化凹陷新近系馆陶组储层岩石胶结疏松,孔隙结构总体孔径较大,孔喉分布较均匀,连通性较好;岩石矿物组成以石英、斜长石、钾长石和岩屑为主,黏土矿物主要包括高岭石、伊利石、绿泥石及伊蒙混层;馆上段以细粒为主,馆下段以中粒为主。②馆陶组储层普遍具中等速敏性、弱碱敏性、弱盐敏性特征;上下两段的酸敏性特征差异较大,上段具有非酸敏性特征,而下段具有强酸敏性特征,酸敏指数达78.28%;③研究区馆陶组铁白云石、绿泥石含量及孔隙结构对储层敏感性具有控制作用。④控制注采流速是研究区开发方案中的重要内容,对馆下段酸敏带来的储层伤害要进行防护和治理。
中图分类号:
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