海上中低黏度油藏早期注聚合物见效特征研究

doi:10.7623/syxb201002017

石油学报 ›› 2010, Vol. 31 ›› Issue (2): 280-283.DOI: 10.7623/syxb201002017

海上中低黏度油藏早期注聚合物见效特征研究

刘睿 1 姜汉桥 1 张贤松 2 陈民锋 1 杨俊茹 2 胡庆贺 1

1中国石油大学石油工程教育部重点实验室北京 102249； 2中海石油研究中心北京 100027

收稿日期:2009-05-09 修回日期:2009-07-13 出版日期:2010-03-25 发布日期:2013-10-31
通讯作者: 刘睿

Effective characteristics of early polymer flooding in mid-to-low viscosity offshore reservoir

LIU Rui 1 JIANG Hanqiao 1 ZHANG Xiansong 2 CHEN Minfeng 1 YANG Junru 2 HU Qinghe 1

Received:2009-05-09 Revised:2009-07-13 Online:2010-03-25 Published:2013-10-31
Contact: LIU Rui

摘要/Abstract

摘要：

早期注聚合物的见效特征以及判别标准是目前海上油田实施早期注聚合物亟待解决的首要问题。将数值模拟与现场动态相结合，对以渤海油田LD10-1为代表的中低黏度油藏进行了早期注聚合物含水率曲线变化特征研究。中低黏度油藏早期注聚合物的含水率曲线形态取决于注聚合物时机界限，有漏斗型和无漏斗型两种变化形式。聚合物驱前水驱注入量大于0.0356PV为早期注聚合物出现含水下降漏斗的条件，与LD10-1油田早期注聚合物各单井含水率曲线特征相吻合。提出了早期注聚合物见效时间和聚效时间的定义，给出了单位含水变化率的增油率和单位含水增油率两个无因次参考指标，将其作为海上早期注聚合物效果评价的量化判别标准。得到了早期、中期、晚期3个不同时期注聚合物见效的量化标准，单位含水变化率的增油率和单位含水增油率随着注聚合物时机的延迟而提高。

关键词: 早期注聚合物, 中低黏度油藏, 注聚合物时机, 含水率, 效果评价, 判别标准

Abstract:

The effective characteristics of the early polymer flooding and its criterion standard are the primary problem to be solved for development of offshore oilfield. The water cut characteristics of LD10-1 reservoir with low viscosity in Bohai Oilfield during the early polymer-flooding were studied by means of numerical simulation and dynamic performance analysis. The two shapes of water cut curves in the early polymer flooding, including funnel and no funnel patterns, were controlled by the limit of polymer injection time. The water injection volume more than 0.0356PV before polymer flooding was the existing condition of funnel curves, which coincided with the characteristics of water cut curves of LD10-1 reservoir during the early polymer flooding. The concepts of effective time and validity term were defined, and two dimensionless indexes including oil-increasing rate per water cut and oil-increasing rate per unit water were given. Those indexes can be used as the criterions of injection effectiveness in the early polymer flooding of offshore oilfields. Accordingly,the criterions for the effective characteristics of different polymer injection in mid and late stages were also proposed. The oil-increasing rate per water cut and the oil-increasing rate per unit water would increase with the delay of the injection time.

Key words: early polymer flooding, mid-to-low viscosity reservoir, polymer injection time, water cut, effectiveness evaluation, criterion standard

刘睿姜汉桥张贤松陈民锋杨俊茹胡庆贺. 海上中低黏度油藏早期注聚合物见效特征研究[J]. 石油学报, 2010, 31(2): 280-283.

LIU Rui JIANG Hanqiao ZHANG Xiansong CHEN Minfeng YANG Junru HU Qinghe. Effective characteristics of early polymer flooding in mid-to-low viscosity offshore reservoir[J]. Editorial office of ACTA PETROLEI SINICA, 2010, 31(2): 280-283.

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海上中低黏度油藏早期注聚合物见效特征研究

Effective characteristics of early polymer flooding in mid-to-low viscosity offshore reservoir

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