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大层段压差分注工艺技术的改进

China Chemical Trade(2017)

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Abstract
油田开发后期,注水开发是保持油田稳产的主要措施,水井分注则是实现注水到层的重要开发手段.由于地下注、采关系复杂,渗透率差异、注水压力高、层间压差进一步加大,形成大孔道,封隔器需承受较大的层间压差,但由于常规应用封隔器靠单向卡瓦支撑,或带有锚定,存在容易损伤套管,以及承压受限的不足,在层间压差大的情况下,有效期短,影响分注效果.
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