特低渗透油藏超前注水长岩芯实验研究

西南石油大学学报(自然科学版) ›› 2011, Vol. 33 ›› Issue (3): 105-108.

特低渗透油藏超前注水长岩芯实验研究

赵春鹏^1，2 岳湘安¹

1. 石油工程教育部重点实验室· 中国石油大学，北京昌平102249；
2. 中国石化石油勘探开发研究院，北京海淀100083

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-06-20 发布日期:2011-06-20

Long-core Experimental Study on Advance Water Injection of Extra-low Permeability Reservoir

ZHAO Chun-peng ^1，2 YUE Xiang-an¹

1. MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Changping, Beijing 100249, China;
2. Petroleum Exploration and Production Research Institute, SINOPEC, Haidian, Beijing 100083, China

Received:1900-01-01 Revised:1900-01-01 Online:2011-06-20 Published:2011-06-20

摘要/Abstract

摘要： 设计了多测点物理模拟装置，利用整体压制的特低渗长岩芯，研究了特低渗油藏超前注水开发的压力传播特征、合理地层压力保持水平和采油井合理开井时机。实验结果表明：为获得较高的采收率，合理地层压力应保持在原始地层压力的110%_120%，合理的油井开井时机为压力传播到油水井间距的30% 左右时。压力传播速度沿岩芯长度逐渐减小，建议注水强度与压力传播速度相匹配，初期适当增加注水强度，有利于尽快建立驱替压力系统，后期适当降低注水强度，保持温和注水，以获得最佳的注水效果。

关键词:

特低渗, 超前注水, 长岩芯, 压力保持水平, 注水强度

Abstract: In order to study the advanced water injection of extra-low permeability reservoir, including pressure transmission characters, the level of formation pressure and reasonable working time of production well, we design long-core physical simulation equipment with multi-pressure measurement nodes and use extra-low permeability long cores. The experiment results show that higher recovery ratio should be obtained when the formation pressure between 110%_120%of initial formation pressure. When the pressure spread to 30%of the distance is between water

well and oil well, it is the reasonable well opening time. The velocity of pressure propagation trend to decrease as the core length increase, so we suggest that water intake per unit thickness should match with the velocity of pressure propagation, and flooding should enhance properly at initial stage, which is beneficial for establishing a displacement pressure system as quickly as possible. Flooding should be reduced properly at later stage, in order to achieve the best flood effectiveness.

Key words:

extra-low permeability, advance water injection, long core, pressure maintenance level, water intake per unit thickness

中图分类号:

TE348

赵春鹏;岳湘安. 特低渗透油藏超前注水长岩芯实验研究[J]. 西南石油大学学报(自然科学版), 2011, 33(3): 105-108.

ZHAO Chun-peng;YUE Xiang-an .

Long-core Experimental Study on Advance Water Injection of Extra-low Permeability Reservoir[J]. 西南石油大学学报(自然科学版), 2011, 33(3): 105-108.

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