新疆石油地质

›› 2017, Vol. 38 ›› Issue (1): 1-1.doi: 10.7657/XJPG20170110

• 论文 •    

超低渗油藏CO2驱正交试验设计与数值模拟优化

李楠1，潘志坚1，苏婷1，费永涛2   

  1. (1.中国石油 勘探开发研究院,北京 100083;2.中国石化 河南油田分公司 勘探开发研究院,河南 南阳 473132)
  • 出版日期:2019-01-01 发布日期:1905-07-13

Orthogonal Test Design and Numerical Simulation Optimization of CO2 Flooding in Extra-Low Permeability Reservoirs

LI Nan1, PAN Zhijian1, SU Ting1, FEI Yongtao2   

  1. (1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China; 2. Research Institute of Exploration and Development, Henan Oilfield Company, Sinopec, Nanyang, Henan 473132, China)
  • Online:2019-01-01 Published:1905-07-13

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摘要： 低渗油藏是中国当前油气勘探开发的主体，其中超低渗油藏分布范围较广，占比例较大，但超低渗油藏物性差，利用传统的水驱方法难以大幅度提高单井产量。CO2驱可以膨胀原油体积，降低原油黏度、油水界面张力和油藏毛细管阻力，从而提高驱油效率。为了合理开发超低渗油藏，基于油藏数值模拟与正交试验设计方法，建立超低渗油藏CO2驱开发模型，对CO2驱影响因素进行了技术经济评价，分析结果表明，开发效果影响参数从大到小依次为油藏类型、井网密度、注入CO2体积。综合单井日产量和内部收益率等因素，优选出了适宜超低渗油藏的开发方式，即水平井CO2驱开发技术以及相应的参数组合。

Abstract: Low permeability reservoirs are the main contributors to the discovered and proved reserves in China currently, among which extra-low permeability reservoirs are widely distributed and account for a large proportion of the reserves. However, extra-low permeability reservoirs are characterized by poor physical properties, so it is difficult to enhance single well production by conventional waterflooding method significantly. CO2 flooding can expand oil volume, reduce oil viscosity, lower interfacial tension and capillary resistance and finally improve oil displacement efficiency. In order to develop extra-low permeability reservoirs reasonably and efficiently, based on numerical simulation and orthogonal design methods, CO2 flooding models are established for extra-low permeability reservoirs, and technical and economic evaluations are carried out for the factors influencing CO2 flooding. The analysis indicates that the parameters influencing development effect from high to low are reservoir type, well spacing density and injected CO2 volume. Considering daily well production and internal rate of return and so on, the optimum way to develop extra-low permeability reservoirs is the combination of CO2 flooding in horizontal wells and the corresponding parameters

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