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塞528区块高压欠注机理研究

Science Technology and Engineering(2017)

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Abstract
针对塞528延9油藏注水井高压欠注的问题,对该区块延9储层的岩石矿物物性、储层敏感性、注入水与地层水水质及配伍性和堵塞物等情况进行了相关室内研究和分析.结果表明:储层原始物性差,弱速敏(28.10%)、中等偏强水敏(69.51%)、中等偏强盐敏(69.51%)、中等偏强土酸敏(52.27%)、弱碱敏(27.50%),注入水与地层水不配伍(产生CaCO3、Caso4垢),垢样中含有铁的含氧化合物和部分CaCO3、CaSO4垢等.剖析了注水井高压欠注的机理,为解决塞528区块高压欠注问题提供了解决思路.
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Key words
water injection well,high pressure injection,formation sensitivity,water quality analysis,compatibility
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