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

特低渗透油藏注CO2 驱参数优化研究

王欢,廖新维,赵晓亮   

  1. 中国石油大学(北京)石油工程学院,北京昌平102249
  • 出版日期:2014-12-01 发布日期:2014-12-01
  • 基金资助:

    国家自然科学基金委员会–中国石油天然气集团公司石油化工联合基金(U1262101)。

Research on CO2 Flooding Parameters Optimization of Extra-low
Permeability Reservoirs

Wang Huan, Liao Xinwei, Zhao Xiaoliang   

  1. School of Petroleum Engineering,China University of Petroleum(Beijing),Changping,Beijing 102249,China
  • Online:2014-12-01 Published:2014-12-01

摘要:

安塞王窑区长6 储层属于特低渗透油藏,经过多年的注水开发,目前已进入中高含水期,注水开发的矛盾日
益突出,进一步提高水驱采收率难度大。CO2 驱在一定程度上能够弥补水驱的不足,是特低渗透油藏提高采收率的一
种重要方式。以安塞王窑区长6 特低渗透油藏为研究对象,分析了该区块的地质特征和注水开发中存在的问题,应用
地质建模技术和油藏数值模拟技术优选了适合该试验区的CO2 驱开发方式,并且进一步优化了地层压力、采油速度、
水气交替时间、关井气油比和总注气量等参数。此次研究成果将为CO2 混相驱现场试验流程建设、试验的实施提供基
础参数,对安塞油田全面实施CO2 驱油技术具有参考和借鉴作用。

关键词: 特低渗透油藏, 长6 储层, CO2 驱油, 数值模拟, 参数优化

Abstract:

The Chang-6 formation of Block Wangyao in Ansai Oilfield belongs to the extra-low permeability reservoir. Currently,
it has entered the high water-cut stage. It is difficult to further enhance recovery by water flooding. However,CO2
flooding is an important EOR approach in extra-low permeability reservoir,which can compensate for the disadvantages of water
flooding. Taking the Chang-6 of Wangyao extra-low permeability reservoir for example,this paper analyzes the geological
features of the block and the problems in water flooding development,and optimizes the CO2 flooding pattern fitting for the
pilot area by applying geological modeling and reservoir numerical simulation techniques,and further optimizes the parameters
of formation pressure,production rate,water alternating gas time,shut-in gas-oil ratio and total gas injection volume. The
results of this study will offer basic parameters of CO2 miscible flooding to the construction and implementation of field test.
It also provides reference to implement action of CO2 flooding technology to the entire Ansai Oilfield.

Key words: extra-low permeability reservoirs;Chang&ndash, 6 formation;CO2 flooding;numerical simulation;parameter optimization