大庆油田聚合物驱分注工艺现状

doi:10.11743/ogg20120216

摘要/Abstract

摘要：

根据大庆油田不同开发阶段的需要,形成了3种成熟配套的聚合物驱分注工艺技术。同心分注技术,其井下管柱采用单管同心分注形式,通过同心配注器对分层注入压力的调节,控制各个层段的注入量。偏心分注工艺,其井下管柱采用单管偏心分注形式,通过偏心配注器形成足够的节流压差,调节注入压力,控制限制层注入量。分层分质注入工艺,其井下管柱采用单管偏心形式,通过分子量调节器或压力调节器,控制注入层段的分子量或注入量。同时,详细阐述了这3种分注工艺技术的工艺原理、技术参数、应用规模以及效果等。依据油田实际的注聚阶段,提出了合理的分注时机与原则,并制定了不同的测试周期。此外,针对不同的油层类型,指出了选择分注技术的原则。最后,根据大庆油田的实际情况,对聚合物驱分注工艺技术未来发展方向与攻关思路进行了探讨,认为小卡距聚合物分注技术与聚合物驱分注井高效测调技术应是重点攻关方向。

关键词: 聚合物驱, 同心分注技术, 偏心分注工艺, 分层分质注入工艺, 开发阶段, 大庆油田

Abstract:

Three separate injection technologies for different stages of development are developed in Daqing oilfield,including concentric separate-injection,eccentric separate injection,and separate-layer molecular injection.The concentric separate-injection technology controls injection rate of each layer by using concentric injection allocator which regulates injection pressure.The eccentric separate injection technology controls injection rate of each layer by using eccentric injection allocator to generate enough differential choke pressure to regulate injection pressure.The separate-layer molecular injection weight technology controls injection rate of each layer by using molecular weight regulator or pressure regulator chosen according to reservoir property.This paper described in-detail their process principles,technical parameters,application scale and their effects et al.According to the actual stages of polymer injection in the oil field,this paper presents the rational timing and principles of separate injection as well as the corresponding test cycles.In addition,the principles for selection of separate injection technologies are also proposed according to the types of pay zones.Short clamping distance of the polymer injection technology and efficient measurement technology of separate injection wells in the polymer flood oilfield are the key research direction in Daqing oilfield.

Key words: polymer flooding, concentric separate-injection technology, eccentric separate-injection technology, separate-layer molecular weight injection technology, development stage, Daqing oilfield

中图分类号:

TE355.2

李海成. 大庆油田聚合物驱分注工艺现状[J]. 石油与天然气地质, 2012, 33(2): 296-301. doi: 10.11743/ogg20120216 Li Haicheng. Overview of separate injection technique for polymer flooding in Daqing oilfield[J]. Oil & Gas Geology, 2012, 33(2): 296-301. doi: 10.11743/ogg20120216

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