西南石油大学学报(自然科学版)

• 石油与天然气工程 • 上一篇    下一篇

海上“三低”油藏CO2 注气开发适应性评价

罗成栋   

  1. 中海石油(中国)有限公司天津分公司,天津塘沽300452
  • 出版日期:2014-06-01 发布日期:2014-06-01

Adaptability Evaluation of CO2 Gas Injection Development for“Three
Low”Offshore Oil Reservoir

Luo Chengdong   

  1. Bohai Petroleum Institute Tianjin Branch of CNOOC,Tanggu,Tianjin 300452,China
  • Online:2014-06-01 Published:2014-06-01

摘要:

针对南海西部海域油田“三低”特征(即电阻率低、含油饱和度低和渗透率低),在开发过程中由于束缚水饱和
度高和泥质含量高,水敏性强,面临注水困难和地层能量补充的问题。在充分调研国内外CO2 驱室内试验研究和注气
开发适应性评价的基础上,以油藏为例,完成了CO2 注气室内试验和油藏数值模拟研究,并在此基础上进行了CO2
注气开发适应性评价。通过数值模拟研究,对衰竭式开发、连续注气和WAG 水气交替注入两种驱替方式进行了方案
设计和对比分析,结果表明该油田CO2 注气开发具有很好的适应性,WAG 水气交替注入能进一步提高油田开发的采
收率。

关键词: 低电阻率, 低渗透, 数值模拟, 适应性评价

Abstract:

In view of the“three low”characteristics(i.e.,low resistivity,low oil saturation and low permeability)of Oilfield
in western South China Sea,water injection and energy supplement difficulties exist in the development process due to high
irreducible water saturation and high shale content and strong water sensitivity. Based on laboratory researches and adaptability
evaluations of gas injection of CO2 at home and abroad,and by taking reservoir as an example,laboratory experiment of CO2
gas injection and reservoir numerical simulation are finished,and theCO2 gas injection development adaptability evaluation is
done on this foundation. A comparison among the depletion type development,continuous gas injection and WAG displacement
through numerical simulation,the result shows CO2 gas injection development has good adaptability,and WAG can further
improve the oil recovery of oilfield development.

Key words: low-resistance, low-permeability, numerical simulation, adaptability evaluation