Special Oil & Gas Reservoirs >

2022 , Vol. 29 >Issue 6: 133 - 140

DOI: https://doi.org/10.3969/j.issn.1006-6535.2022.06.017

Reservoir Engineering

Analysis of Influencing Factors on the Development Effect of CO2 Assisted Gravity Flooding

  • Lei Meng ,
  • Qu Yaguang ,
  • Wan Cuirong ,
  • Yang Bo ,
  • He Denghui ,
  • Ma Guoqing ,
  • Gong Xu
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  • 1. Yangtze University, Wuhan, Hubei 430100;
    2. Hubei Provincial Key Laboratory of Oil and Gas Drilling and Production Engineering, Wuhan, Hubei 430100;
    3. PetroChina Southwest Oil & Gasfield Company, Chongqing 400021;
    4. PetroChina Changqing Oilfield Company, Qingyang, Gansu 745000;
    5. PetroChina Tarim Oilfield Company, Korla, Xinjiang 841000

Received date: 2022-01-10

  Revised date: 2022-07-20

  Online published: 2023-01-10

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Abstract

To address the problem that the effect of various geological parameters on the development of CO2-assisted gravity flooding technology is still unclear, taking a medium and low permeability oil reservoir as the research object, a number of theoretical models of one-injection and one-recovery mechanism were established to study the influence of the formation sedimentary rhythm, dip angle, permeability, porosity, ratio of vertical permeability to horizontal permeability, and permeability max-min ratio on the effect of the CO2-assisted gravity flooding. The result shows: The CO2-assisted gravity flooding is more suitable for positive rhythm sedimentary strata than negative rhythm strata; there is a certain formation dip, which is conducive to gravitational differentiation and formation of gas caps; the CO2-assisted gravity flooding is carried out in medium-low permeability and low-porosity oil reservoirs, which has a certain effect on the inhibition of gas channeling breakthrough. The smaller the ratio of vertical permeability to horizontal permeability, the more conducive to inhibiting the rapid vertical diffusion of gas. The permeability max-min ratio has little effect on CO2-assisted gravity flooding. The influence of different geological factors on the recovery degree is the ratio of vertical permeability to horizontal permeability, formation dip angle, formation permeability, formation porosity, formation permeability max-min ratio in descending order. The field test of the A Reservoir shows that CO2-assisted gravity flooding can increase the stage cumulative oil production by more than 3 times, and can achieve a significant increase in production. The research results can provide theoretical guidance for the development of CO2 flooding in similar oilfields.

Key words： gas-assisted gravity flooding; reservoir numerical simulation; reservoir physical properties; influencing factors; orthogonal experimental design

Cite this article

Lei Meng , Qu Yaguang , Wan Cuirong , Yang Bo , He Denghui , Ma Guoqing , Gong Xu . Analysis of Influencing Factors on the Development Effect of CO2 Assisted Gravity Flooding[J]. Special Oil & Gas Reservoirs, 2022 , 29(6) : 133 -140 . DOI: 10.3969/j.issn.1006-6535.2022.06.017

References

[1] 汪孟洋,纪常杰.提高原油采收率技术发展现状[J].国外油田工程,2005,21(8):1-3.
WANG Mengyang,JI Changjie.Actuality of EOR technology development[J].Foreign Oilfield Engineering,2005,21(8):1-3.
[2] 王国民,高江取,刘孔章,等.复杂断块油藏氮气驱提高采收率技术研究[J].特种油气藏,2004,11(3):46-48,67.
WANG Guomin,GAO Jiangqu,LIU Kongzhang,et al.Nitrogen drive EOR study for complex faulted reservoir[J].Special Oil & Gas Reservoirs,2004,11(3):46-48,67.
[3] 高振环,刘中春,杜家兴.油田注气开采技术[M].北京:石油工业出版社,1994:9-12.
GAO Zhenhuan,LIU Zhongchun,DU Jiaxing.Production technology by gas injection[M].Beijing:Petroleum Industry Press,1994:9-12.
[4] GRATTONI C A,JING X D,DAWE R A.Dimensionless groups for threephase gravity drainage flow in porous media[J].Journal of PetroleumScience and Engineering,2001,1664(29):53-65.
[5] BLUNT M,ZHOU D,FENWICK D.Three-phase flow and gravity drainagein porous media[C].SPE90099,1995:77-103.
[6] CHATZIS I,KANTZAS A,DULLIEN F A L.On the investigation of gravity assisted inert gas injection using micro models,long berea cores andcomputer assisted tomography[C].SPE18284,1988:2-5.
[7] CRAIG F F,SANDERLIN J L,MOORE D W,et al.A laboratory study of gravity segregation in frontal drives[J].Petroleum Transaction AIME,1957,210(1):275-281.
[8] 冷振鹏,吕伟峰,马德胜,等.利用CT技术研究重力稳定注气提高采收率机理[J].石油学报,2013,34(2):340-345 .
LENG Zhenpeng,LYU Weifeng,MA Desheng,et al.Research of enhancing oil recovery mechanism of GAGD using CT scanning method[J].Acta Petrolei Sinica,2013,34(2):340-345.
[9] 杨丽娟,陈小凡,徐海棠,等.地层参数对油藏注气开发效果的影响分析[J].西部探矿工程,2006,18(4):95-97.
YANG Lijuan,CHEN Xiaofan,XU Haitang,et al.Analysis of the influence of formation parameters on the development effect of reservoirs by gas injection[J].West-china Exploration Engineering,2006,18(4):95-97.
[10] 梁淑贤,周炜,张建东.顶部注气稳定重力驱技术有效应用探讨[J].西南石油大学学报(自然科学版),2014,36(4):86-92.
LIANG Shuxian,ZHOU Wei,ZHANG Jiandong.Investigation on effect application of the technology of crestal gas injection for stable gravity flooding[J].Journal of Southwest Petroleum University (Science & Technology Edition),2014,36(4):86-92.
[11] 张恒发,金佩强.重力辅助注气三采工艺的孔隙微观观测[J].国外油田工程,2005,21(1):1-5.
ZHANG Hengfa,JIN Peiqiang.Pore-level observation of gravity assisted tertiary gas-injection processes[J].Foreign Oilfield Engineering,2005,21(1):1-5.
[12] 郭平,李士伦,杜志敏,等.低渗透油藏注气提高采收率评价[J].西南石油学院学报,2002,24(5):46-50.
GUO Ping,LI Shilun,DU Zhimin,et al.Evaluation of enhanced oil recovery by gas injection in low permeability reservoirs[J].Journal of Southwest Petroleum Institute,2002,24(5):46-50.
[13] 熊钰,孙良田,孙雷,等.倾斜多层油藏注N2非混相驱合理注气速度研究[J].西南石油学院学报,2002,24(5):34-36.
XIONG Yu,SUN Liangtian,SUN Lei,et al.Reasonable velocity of N2 injection nonmiscible flooding in tilting multilayer reservoir[J].Journal of Southwest Petroleum Institute,2002,24(5):34-36.
[14] BUTLER R M.A new approach to the modeling of steam assisted gravity drainage[J].Journal of Canadian Petroleum Technology,1985,58(7):42-51.
[15] HAGOORT J.Oil recovery by gravity drainage[J].Society of Petroleum Engineers Journal,1980,20(3):139-150.
[16] KANTZAS A,CHATZIS L,DULLIEN F A L.Enhanced oil recovery by inert gas injection[C].SPE17379,1988:72-80.
[17] WEI Y,HAMID R L,KAN W,et al.CO2 injection for enhanced oil recovery in Bakken tight oil reservoirs[J].Fuel,2015,159(6):354-363.
[18] 李士伦,汤勇,侯承希.注CO2提高采收率技术现状及发展趋势[J].油气藏评价与开发,2019,9(3):1-8.
LI Shilun,TANG Yong,HOU Chengxi.Present situation and development trend of CO2 injection enhanced oil recovery technology[J].Reservoir Evaluation and Development,2019,9(3):1-8.
[19] 刘德华.油藏工程基础[M].北京:石油工业出版社,2011:21-25.
LIU Dehua.Fundamentals of reservoir engineering[M].Beijing:Petroleum Industry Press,2011:21-25.
[20] 孔凡群.低渗透油藏CO2非混相驱气窜影响因素试验[J].中国石油大学学报(自然科学版),2021,45(3):97-103.
KONG Fanqun.Experimental study on gas channeling during CO2 immiscible flooding for low-permeability oil reservoirs[J].Journal of China University of Petroleum (Edition of Natural Sciences),2021,45(3):97-103.
[21] JOSHI S D.Cost benefits of horizontal wells[C].SPE83621,2003:23-26.
[22] 张陈珺.王场油田气体辅助重力驱机理研究[D].成都:西南石油大学,2015.
ZHANG Chenjun.Research on the mechanism of gas-assisted gravity flooding in Wangchang Oilfield[D].Chengdu:Southwest Petroleum University,2015.
[23] 张新平,江金国.材料科学与工程实验设计与数据处理[M].北京:化学工业出版社,2021:45-60.
ZHANG Xinping,JIANG Jinguo.Materials science and engineering experimental design and data processing[M].Beijing:Chemical Industry Press,2021:45-60.
[24] 常元昊,姜汉桥,李俊键,等.高倾角低渗断块油藏顶部注气规律研究[J].科学技术与工程,2016,15(33):179-183.
CHANG Yuanhao,JIANG Hanqiao,LI Junjian,et al.The study on crestal injection for fault block reservoir with high dip and low permeability[J].Science Technology and Engineering,2016,15(33):179-183.
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