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现代地质 ›› 2022, Vol. 36 ›› Issue (05): 1432-1439.DOI: 10.19657/j.geoscience.1000-8527.2022.061

• 碳储科学与地热开发 • 上一篇    下一篇

强边底水油藏特高含水期CO2吞吐差异挖潜技术研究

罗福全1,2(), 王淼2, 王群会2, 耿文爽2, 侯健1(), 赵慧慧2   

  1. 1.中国石油大学(华东) 石油工程学院,青岛 山东 266580
    2.中国石油 冀东油田分公司 勘探开发研究院,河北 唐山 063004
  • 收稿日期:2021-12-10 修回日期:2022-07-30 出版日期:2022-10-10 发布日期:2022-11-03
  • 通讯作者: 侯健
  • 作者简介:侯 健,男,教授,博士生导师,1972年出生,油气田开发工程专业,从事水驱及三次采油方面的科研及教学工作。Email: sllx_upc@126.com
    罗福全,男,高级工程师,1985年出生,油气田开发工程专业,主要从事油田开发研究工作。Email: jxgs_luofq2011@petrochina.com.cn

Study on Different Potential Exploitation Technology of CO2 Huff and Puff in High Water Cut Period of Strong Bottom Water Reservoir

LUO Fuquan1,2(), WANG Miao2, WANG Qunhui2, GENG Wenshuang2, HOU Jian1(), ZHAO Huihui2   

  1. 1. School of Petroleum Engineering,China University of Petroleum, Qingdao, Shandong 266580, China
    2. Research Institute of Exploration and Development, Jidong Oilfield Company, PetroChina, Tangshan, Hebei 063004, China
  • Received:2021-12-10 Revised:2022-07-30 Online:2022-10-10 Published:2022-11-03
  • Contact: HOU Jian

摘要:

冀东油田浅层强边底水油藏已整体进入特高含水开发阶段,剩余油高度分散、含油饱和度不均,不同油井CO2吞吐效果差异大,难以实现油藏整体高效开发。考虑到油藏含油饱和度不同,差异设计CO2吞吐段塞组合及开发政策,改善CO2吞吐开发效果是十分必要的。利用二维物理模拟及油藏数值模拟,研究不同CO2吞吐方式控水增油机理,定量评价不同CO2吞吐方式适应含油饱和度界限,建立不同含油饱和度下吞吐注采参数差异化设计图版。研究结果表明:剩余油饱和度介于0.47~0.50之间时,CO2吞吐技术经济综合效果最优;剩余油饱和度介于0.43~0.47之间时,CO2+堵剂吞吐方式最优;剩余油饱和度介于0.375~0.430之间时,CO2+表活剂+堵剂吞吐方式最佳。上述研究成果对特高含水油藏CO2吞吐差异设计精准挖潜剩余油,实现油藏整体高效开发具有重要意义。

关键词: CO2吞吐, 特高含水阶段, 差异设计, 强边底水

Abstract:

The shallow strong edge and bottom water reservoir in Jidong Oilfield has entered the stage of ultra-high water cut development. The remaining oil is highly dispersed and the oil saturation is uneven. The effect of CO2 huff and puff in different oil wells is different, which is difficult to achieve the overall efficient development of the reservoir. Considering the different oil saturations of reservoirs, it is necessary to design the slug combination and development policy of CO2 huff and puff, so as to provide guidance for improving the development effect of CO2 huff and puff. By means of two-dimensional physical simulation and reservoir numerical simulation, the mechanism of water control and oil increase in different CO2 huff and puff methods is studied, and the oil saturation limit corresponding to different CO2 huff and puff methods to oil saturation is quantitatively evaluated. The differential design chart of injection and production parameters under different oil saturation is established. The results show that when the residual oil saturation is between 0.47 and 0.50, the comprehensive economic effect of CO2 huff and puff is the best. When the remaining oil saturation is between 0.43 and 0.47, the CO2+plugging agent throughput method is the best. When the residual oil saturation is between 0.375 and 0.430, the CO2+surfactant+plugging agent throughput is the best. The above research results are of great significance for the differential design of CO2 huff and puff in ultra-high water cut reservoirs to accurately tap the remaining oil and realize the overall efficient development of reservoirs.

Key words: CO2 huff and puff, typical high water cut period, differential design, strong edge and bottomwater

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