岩性油气藏 ›› 2016, Vol. 28 ›› Issue (4): 106–112.doi: 10.3969/j.issn.1673-8926.2016.04.015

• 油气田开发 • 上一篇    下一篇

考虑流体非均质性的低渗透油藏CO2驱试井分析

李友全1,孟凡坤2,阎燕1,韩凤蕊1,于伟杰1,周诗雨3   

  1. (1.中国石化胜利油田分公司勘探开发研究院,山东东营257015;2.中国石油大学(华东)石油工程学院,山东青岛266580;3.中国石油集团川庆钻探工程地球物理勘探公司,成都610213)
  • 出版日期:2016-07-20 发布日期:2016-07-20
  • 作者简介:李友全(1970-),男,高级工程师,主要从事试井及高压物性实验方面的研究工作。地址:(257015)山东省东营市东营区聊城路2 号。电话:(0543)8715470。E-mail:liyouquan.slyt@Sinopec.com。
  • 基金资助:

    国家重点基础研究发展计划(973)项目“中国东部古近系陆相页岩油富集机理与分布规律”(编号:2014CB239103)及教育部长江学者和创新团队发展计划项目(编号:IRT1294)联合资助

Pressure transient analysis on CO2 flooding in low permeability reservoirs considering fluid heterogeneity

Li Youquan1,Meng Fankun2,Yan Yan1,Han Fengrui1,Yu Weijie1,Zhou Shiyu3   

  1. (1. Research Institute of Exploration and Development,Sinopec Shengli Oilfield Company,Dongying 257015,Shandong,China;2. College of Petroleum Engineering,China University of Petroleum,Qingdao 266580,Shandong,China;3. Geophysical Prospecting Company of Chuanqing Drilling Engineering,CNPC,Chengdu 610213,China)
  • Online:2016-07-20 Published:2016-07-20

摘要:

CO2 驱是提高低渗透油藏采收率的一种重要方式,但目前对驱替过程中压力响应动态的认识不足。CO2 的注入使地层流体性质发生改变,形成CO2 区、CO2 -原油过渡区和未波及原油区。基于复合油藏渗流理论,引入幂律型公式和牛顿插值公式来描述CO2 -原油过渡区内流体非均质性的变化特征,建立了低渗透油藏CO2 驱试井模型,并采用数值方法进行求解。对CO2 -原油过渡区内2 种流体非均质性变化形式下的试井曲线特征进行了分析。结果表明:当CO2 -原油过渡区内流体黏度与综合压缩系数均呈幂律型变化时,其变化指数均增大,CO2 区与CO2 -原油过渡区流度比和导压系数比均增加,压力导数曲线斜率增大;当CO2 -原油过渡区综合压缩系数呈非连续性变化时,压力导数曲线因CO2 区与CO2 -原油过渡区导压系数比的增加而呈现下凹趋势。最后,通过实例应用提出了CO2 驱试井解释方法。

关键词: 一间房组, 碳酸盐岩, 成岩作用, 顺南地区, 塔里木盆地

Abstract:

CO2 flooding in low permeability reservoirs is considered as one of the most significant EOR methods.However, there is lack of clear recognition on pressure response performance during the flooding process currently.Injection of CO2 will change the physical property of reservoir fluids, and three zones could be developed, which are CO2 zone, CO2 -oil transition zone and unswept oil zone, respectively. Hence, based on the seepage theory of composite reservoir model, the power?law and Newton interpolation equations were introduced to describe the variable characteri?stics of fluid heterogeneity in CO2 -oil transition zone. The well testing model for CO2 flooding in low  permeability reservoir was presented, and it was solved by numerical differential method. The pressure transient curves at two different fluid heterogeneity variation forms were analyzed. The results demonstrate that for power-law variation of viscosity and compressibility in CO2 -oil transition zone, the mobility and diffusivity ratio between CO2 zone and CO2 -oil transition zone increased with variation exponents, which leads to the rise of pressure derivative curves slope. As the compressibility in CO2 -oil transition zone varied discontinuously, since the increase of diffusivity ration between CO2 region and CO2 -oil transition region, the pressure derivative curves would drop. Finally,the well testing explanation method for CO2 flooding was presented through the application of real case.

Key words: Yijianfang Formation, carbonate rocks, diagenesis, Shunnan area, Tarim Basin

 [1] 曹学良,郭平,杨学峰,等.低渗透油藏注气提高采收率前景分析[J].天然气工业,2006,26(3):100-102.

Cao Xueliang,Guo Ping,Yang Xuefeng,et al. An analysis of prospect of EOR by gas injection in low?permeability oil reservoir[J]. Natural Gas Industry,2006,26(3):100-102.

[2] 高慧梅,何应付,周锡生.注二氧化碳提高原油采收率技术研究进展[J].特种油气藏,2009,16(1):6-12.

Gao Huimei,He Yingfu,Zhou Xinsheng. Research progress on CO2 EOR technology[J]. Special Oil and Gas Reservoirs,2009,16(1):6-12.

  [3] Holm L W,Josendel V A. Mechanisms of oil displacement by carbon dioxide[J]. Journal of Petroleum Technology,1974,26(12):1427-1436.

  [4] 陈祖华,汤勇,王海妹,等. CO2驱开发后期防气窜综合治理方法研究[J].岩性油气藏,2014,26(5):102-106.

Chen Zuhua,Tang Yong,Wang Haimei,et al. Comprehensive treat?ment of gas channeling at the later stage of CO2 flooding[J]. Litho?logic Reservoirs,2014,26(5):102-106.

  [5] 李军,张军华,谭明友,等. CO2驱油及其地震监测技术的国内外研究现状[J].岩性油气藏,2016,28(1):128-134.

Li Jun,Zhang Junhua,Tan Mingyou,et al. Research status of CO2 flooding and its seismic monitoring technologies[J]. Lithologic Reservoirs,2016,28(1):128-134.

  [6] Tang R W,Ambastha A K. Analysis of CO2 pressure transient data with two?and three?region analytical radial composite model[R]. SPE 18275,1988:143-152.

  [7] Ambastha A K,Jr Ramery H J. Pressure transient analysis for a three region composite reservoir[R]. SPE 24378,1992:589-598.

  [8] 王敬瑶. 二氧化碳试验区试井测试资料分析及应用[J].大庆石油学院学报,2011,35(3):85-90.

Wang Jingyao. Analysis of well testing data of carbon dioxide floo?ding zone and its application[J]. Journal of Daqing Petroleum In?stitute,2011,35(3):85-90.

  [9] 朱建伟,邵长金,廖新维,等.注二氧化碳混相驱试井模型及压力分析[J].油气井测试,2011,20(4):1-4.

Zhu Jianwei,Shao Changjin,Liao Xinwei,et al. Miscible flooding well test model with carbon dioxide injection and its pressure analysis[J]. Well Tesing,2011,20(4):1-4.

[10] 苏玉亮,孟凡坤,周诗雨,等.低渗透油藏CO2驱试井曲线特征分析[J].科技导报,2015,33(18):34-39.

Su Yuliang,Meng Fankun,Zhou Shiyu,et al. Characteristics analy?sis of well testing curve of CO2 flooding in low permeability reser?voir[J]. Science & Technology Reiview,2015,33(18):34-39.

[11] 徐阳.低渗油藏CO2近混相驱提高采收率机理研究[D].青岛:中国石油大学(华东),2011.

Xu Yang. Mechanisms of near miscible CO2 flooding for EOR in low permeability reservoirs[D]. Qingdao:China University of Pe?troleum (East China),2011.

[12] 李虎,蒲春生,吴飞鹏.基于广义回归神经网络的CO2驱最小混相压力预测[J].岩性油气藏,2012,24(1):108-111.

Li Hu,Pu Chunsheng,Wu Feipeng. Prediction of minimum misci?bility pressure in CO2 flooding based on general regression neural network[J]. Lithologic Reservoirs,2012,24(1):108-111.

[13] 叶安平,郭平,王绍平,等.利用PR状态方程确定CO2驱最小混相压力[J].岩性油气藏,2012,24(6):125-128.

Ye Anping,Guo Ping,Wang Shaoping,et al. Determination of mi?nimum miscibility pressure for CO2 flooding by using PR equation of state[J]. Lithologic Reservoirs,2012,24(6):125-128.

[14] 黄春霞,汤瑞佳,余华贵,等.高压悬滴法测定CO2 -原油最小混相压力[J].岩性油气藏,2015,27(1):127-130.

Huang Chunxia,Tang Ruijia,Yu Huagui,et al. Determination of the minimum miscibility pressure of CO2 and crude oil system by hanging drop method[J]. Lithologic Reservoirs,2015,27(1):127-130.

[15] 雷霄,孙召勃,王研研,等.低渗透疏松油藏注水井试井分析[J].科技导报,2014,32(2):1-4.

Lei Xiao,Sun Zhaobo,Wang Yanyan,et al. Well test analysis of water injection wells in low?permeability unconsolidated oil reser?voirs [J]. Science & Technology Reiview,2014,32(2):1-4.

[16] 赵辉.油藏开发闭合生产优化理论研究[D].青岛:中国石油大学(华东),2011.

Zhao Hui. Theoretical research on reservoir closed?loop production optimization[D]. Qingdao:China University of Petroleum (EastChina),2011.
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