Research and Application of Comprehensive Adjustment Technology for Offshore Polymer Flooding Oilfield

Xiaodong Kang, Jian Zhang, Peng Li, Yang Zeng
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Abstract

During the implementation of polymer flooding, high injection pressure and water cut return occur in the later stage. The early polymer flooding in offshore oilfields is more sensitive to the change of injection and production rate, so it is necessary to explore a new early polymer injection development mode suitable for offshore oilfields. By considering the impact factors of early polymer flooding development in offshore oilfields, such as large well spacing, thick oil layer, early polymer injection timing, limited platform life and space, the "pan type" development mode of polymer flooding water cut in offshore oilfields is established based on experimental research and numerical simulation and achieved the polymer flooding overall infill, polymer/surface binary flooding, unstable polymer flooding technology which has been applied in 3 oilfields in Bohai bay, providing support for the polymer flooding technology development in offshore oil fields in China.
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海上聚合物驱油田综合调整技术研究与应用
在聚合物驱实施过程中,后期会出现高注入压力和回水现象。海上油田早期聚合物驱对注采速度的变化更为敏感,因此有必要探索适合海上油田的早期聚合物注入开发新模式。考虑到海上油田早期聚合物驱开发的井距大、油层厚、注聚时机早、平台寿命和空间有限等影响因素,通过实验研究和数值模拟,建立了海上油田聚合物驱含水“盘式”开发模式,实现了聚合物驱整体充填、聚合物/地面二元驱、不稳定聚合物驱技术已在渤海湾3个油田得到应用,为国内海上油田聚合物驱技术的发展提供了支撑。
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