文南油田文33断块区沙二下亚段开发中后期沉积微相研究的意义

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重新认识处于开发中后期油藏的沉积微相及其特征,对于查明剩余油分布和挖掘剩余油潜力、提高采收率具有重要的现实意义。文33断块沙二下亚段三角洲前缘沉积主要微相类型有水下分支河道、水下分支河道侧翼、分支河口坝、水下天然堤-决口扇、远砂坝等5种沉积微相类型。分析了沉积微相类型对砂体发育与展布、储集层物性及水淹特征的控制作用,建议在下一步的开发调整和剩余油挖潜中,应充分考虑沉积微相研究成果。
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