超临界CO2在致密油藏中的扩散前缘预测

doi:10.11885/j.issn.1674-5086.2019.10.30.02

西南石油大学学报(自然科学版) ›› 2020, Vol. 42 ›› Issue (2): 94-102.DOI: 10.11885/j.issn.1674-5086.2019.10.30.02

超临界CO₂在致密油藏中的扩散前缘预测

魏兵¹, 尚静¹, 蒲万芬¹, 卡杰特·瓦列里², 赵金洲¹

1. 油气藏地质及开发工程国家重点实验室·西南石油大学, 四川成都 610500;
2. 古勃金国立石油与天然气大学, 俄罗斯莫斯科 119991

收稿日期:2019-10-30 出版日期:2020-04-10 发布日期:2020-04-10
通讯作者: 魏兵,E-mail:bwei@swpu.edu.cn
作者简介:魏兵,1983年生,男,汉族,山东济宁人,教授,博士生导师,主要从事非常规油藏提高采收率技术和理论方面的研究工作。E-mail:bwei@swpu.edu.cn;尚静,1993年生,男,汉族,甘肃陇南人,硕士研究生,主要从事致密油藏注气提高采收率方面的研究工作。E-mail:shjing93@163.com;蒲万芬,1961年生,女,汉族,四川南充人,教授,博士生导师,主要从事提高采收率原理与技术方面的研究工作。E-mail:pwf58@163.com;卡杰特·瓦列里,1953年生,男,俄罗斯莫斯科人,教授,博士生导师,主要从事油气田开发,油藏工程和提高采收率等方面的研究工作。E-mail:kadet.v@gubkin.ru;赵金洲,1962年生,男,汉族,湖北仙桃人,教授,博士生导师,主要从事油气田开采和增产新技术新理论方面的研究工作。E-mail:zhaojz@swpu.edu.cn
基金资助:
国家重点基础研究发展计划（973计划）（2015CB250900）；国家自然科学基金（51974265）

Predicting the Diffusive Front of Supercritical CO₂ in Tight Oil Reservoirs

WEI Bing¹, SHANG Jing¹, PU Wanfen¹, Kadet VALERIY², ZHAO Jinzhou¹

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. National State University of Oil and Gas, Gubkin University, Moscow, 119991, Russia

Received:2019-10-30 Online:2020-04-10 Published:2020-04-10

摘要/Abstract

摘要： 国内外大部分学者认为超临界CO₂在致密油藏中的扩散是吞吐提高采收率的关键因素之一。通过设计基质裂缝模型结合压降法搭建了测定超临界CO₂在饱和油岩芯中扩散系数的实验装置，系统研究了压力、储层物性等油藏条件对超临界CO₂扩散系数及浓度分布的影响规律，建立了超临界CO₂浓度场及扩散前缘的预测方法。实验结果表明，超临界CO₂在致密岩芯（0.06 mD）中的扩散系数为10^-12 m²/s数量级，扩散系数随着初始注气压力的升高而增大，最终趋于平缓，但在临界压力点附近出现最大扩散系数；扩散系数随基质渗透率和孔隙度增大而增大，随岩芯迂曲度的增大而快速递减。经过900 d扩散，扩散前缘仅前进了0.095 m，因此，在致密油藏CO₂吞吐现场作业周期内忽略扩散作用是合理的。在扩散后期，CO₂浓度梯度越来越小，扩散速度逐渐降低。

关键词: 超临界CO₂, 致密油藏, CO₂吞吐, 压降法, 扩散系数, 扩散前缘

Abstract: Most of researchers claim that supercritical CO₂ diffusion is one of the key considerations for CO₂ huff-puff EOR in tight reservoirs. In this paper, a matrix-fracture model was designed and applied to measuring the diffusion coefficient of supercritical CO₂ in saturated oil cores using pressure decay method. The influence of reservoir conditions such as pressure and core petroproperties on the diffusion coefficient and concentration distribution of supercritical CO₂ was comprehensively investigated, and a method predicting CO₂ concentration field and diffusion front was established. The experimental results showed that the diffusion coefficient of supercritical CO₂ in the tight core (0.06 mD) is in the order of 10^-12 m²/s. The diffusion coefficient was found to increase with the increase of the initial gas injection pressure before finally leveling off after a certain pressure. The maximum diffusion coefficient occured around the critical pressure point. In addition, the diffusion coefficient increased with the increase of matrix permeability and porosity, whereas it decreased with the increase of core tortuosity. After 900 days, diffusion in tight reservoirs, the diffusion front only advanced 0.095 m. Therefore, it is rational to neglect the diffusing effect of CO₂ in the field operation cycle of CO₂ injection in tight reservoirs. In the later stage of diffusion, the concentration gradient of CO₂ became low leading to gradual decrease of diffusion.

Key words: supercritical CO₂, tight oil reservoir, CO₂ injection, pressure decay method, diffusion coefficient, diffusion front

中图分类号:

TE357

魏兵, 尚静, 蒲万芬, 卡杰特·瓦列里, 赵金洲. 超临界CO₂在致密油藏中的扩散前缘预测[J]. 西南石油大学学报(自然科学版), 2020, 42(2): 94-102.

WEI Bing, SHANG Jing, PU Wanfen, Kadet VALERIY, ZHAO Jinzhou. Predicting the Diffusive Front of Supercritical CO₂ in Tight Oil Reservoirs[J]. 西南石油大学学报(自然科学版), 2020, 42(2): 94-102.

0
/ / 推荐

导出引用管理器 EndNote|Ris|BibTeX

链接本文: http://journal15.magtechjournal.com/Jwk_xnzk/CN/10.11885/j.issn.1674-5086.2019.10.30.02

http://journal15.magtechjournal.com/Jwk_xnzk/CN/Y2020/V42/I2/94

参考文献

[1] 贾承造,郑民,张永峰. 中国非常规油气资源与勘探开发前景[J]. 石油勘探与开发, 2012, 39(2):129-136. JIA Chengzao, ZHENG Min, ZHANG Yongfeng. Unconventional hydrocarbon resources in China and the prospect of exploration and development[J]. Petroleum Exploration and Development, 2012, 39(2):129-136.
[2] ZHANG Xiang, WEI Bing, SHANG Jing, et al. Alterations of geochemical properties of a tight sandstone reservoir caused by supercritical CO₂-brine-rock interactions in CO₂-EOR and geosequestration[J]. Journal of CO₂ Utilization, 2018, 28:408-418. doi:10.1016/j.jcou.2018.11.002
[3] 魏海峰,凡哲元,袁向春. 致密油藏开发技术研究进展[J]. 油气地质与采收率, 2013, 20(2):62-66. doi:10.3969/j.issn.1009-9603.2013.02.016 WEI Haifeng, FAN Zheyuan, YUAN Xiangchun. Research progress on tight reservoir development technology[J]. Oil and Gas Geology and Recovery, 2013, 20(2):62-66. doi:10.3969/j.issn.1009-9603.2013.02.016
[4] 朱维耀,岳明,刘昀枫,等. 中国致密油藏开发理论研究进展[J]. 工程科学学报, 2019, 41(9):110.1114. doi:10.13374/j.issn2095-9389.2019.09.001 ZHU Weiyao, YUE Ming, LIU Yunfeng, et al. Research progress of tight reservoir development theory in China[J]. Chinese Journal of Engineering Science, 2019, 41(9):110.1114. doi:10.13374/j.issn2095-9389.2019.09.001
[5] BALASUBRAMANIAN S, CHEN P, BOSE S, et al. Recent advances in enhanced oil recovery technologies for unconventional oil reservoirs[C]. OTC 28973-MS, 2018. doi:10.4043/28973-MS
[6] ZHANG Y, DI Y, YU W, et al. A comprehensive model for investigation of carbon dioxide enhanced oil recovery with nanopore confinement in the Bakken tight oil reservoir[C]. SPE 187211-PA, 2018. doi:10.2118/187211-PA
[7] 杨俊兰,马一太,曾宪阳,等. 超临界压力下CO₂流体的性质研究[J]. 流体机械, 2008, 36(1):53-57. doi:10.3969/j.issn.1005-0329.2008.01.014 YANG Junlan, MA Yitai, ZENG Xianyang, et al. Study on properties of CO₂ fluid at supercritical pressure[J]. Fluid Machinery, 2008, 36(1):53-57. doi:10.3969/j.issn.1005-0329.2008.01.014
[8] 魏兵,宋涛,赵金洲,等. 溶解气回注提高致密油藏采收率效果及敏感性[J]. 西南石油大学学报(自然科学版), 2019, 41(5):85-95. doi:10.11885/j.issn.1674-5086.2019.07.06.01 WEI Bing, SONG Tao, ZHAO Jinzhou, et al. Improving the recovery efficiency and sensitivity of tight oil reservoirs by dissolved gas reinjection[J]. Journal of Southwest Petroleum University (Natural Science Edition), 2019, 41(5):85-95. doi:10.11885/j.issn.1674-5086.2019.07.06.01
[9] 杜林,刘伟,陈星杙,等. CO₂在原油中扩散系数测定方法的研究进展[J]. 油田化学, 2019, 36(2):372-380. doi:10.19346/j.cnki.1000-4092.2019.02.034 DU Lin, LIU Wei, CHEN Xingyi, et al. Progress in the determination of CO₂ diffusivity in crude oil[J]. Oilfield Chemistry, 2019, 36(2):372-380. doi:10.19346/j.cnki.1000-4092.2019.02.034
[10] RIAZI M R. A new method for experimental measurement of diffusion coefficients in reservoir fluids[J]. Journal of Petroleum Science & Engineering, 1996, 14(3-4):235-250. doi:10.1016/0920-4105(95)00035-6
[11] ZHANG Y P, HYNDMAN C L, MAINI B B, et al. Measurement of gas diffusivity in heavy oils[J]. Journal of Petroleum Science and Engineering, 2000, 25(1-2):37-47. doi:10.1016/S0920-4105(99)00031-5
[12] 张彪. 高温高压下二氧化碳在饱和油多孔介质中的扩散系数研究[D]. 长沙:湖南大学, 2016. ZHANG Biao. Diffusion coefficient of carbon dioxide in oil-saturated porous media at high temperature and pressure[D]. Changsha:Hunan University, 2016.
[13] LI Songyan, LI Zhaomin, DONG Quanwei. Diffusion coefficients of supercritical CO₂ in oil-saturated cores under low permeability reservoir conditions[J]. Journal of CO₂ Utilization, 2016, 14:47-60. doi:10.1016/j.jcou.2016.02.002
[14] LI Songyan, QIAO Chenyu, ZHANG Chao, et al. Determination of diffusion coefficients of supercritical CO₂ under tight oil reservoir conditions with pressure-decay method[J]. Journal of CO₂ Utilization, 2018, 24:430-443. doi:10.1016/j.jcou.2018.02.002
[15] RENNER T A. Measurement and correlation of diffusion coefficients for CO₂ and rich-gas applications[C]. SPE 15391-PA, 1988. doi:10.2118/15391-PA
[16] YU Boming. Fractal character for tortuous streamtubes in porous media[J]. Chinese Physics Letters, 2005, 22(1):158-160. doi:10.1088/0256-307X/22/1/045
[17] THARANIVASAN A K, YANG Chaodong, GU Yongan, et al. Measurements of molecular diffusion coefficients of carbon dioxide, methane, and propane in heavy oil under reservoir conditions[J]. Energy Fuels, 2006, 20(6):2509-2517. doi:10.1021/ef060080d
[18] WANG L S, LANG Z X, GUO T M. Measurement and correlation of the diffusion coefficients of carbon dioxide in liquid hydrocarbons under elevated pressures[J]. Fluid Phase Equilibria, 1996, 117(1-2):364-372. doi:10.1016/0378-3812(95)02973-7
[19] 王欢,李正山,洪荷芳. 超临界流体的应用及发展趋势[J]. 环境技术, 2003, 21(5):8-10. doi:10.3969/j.issn.1004-7204.2003.05.003 WANG Huan, LI Zhengshan, HONG Hefang. Application and development trend of supercritical fluid[J]. Environmental Technology, 2003, 21(5):8-10. doi:10.3969/j.issn.1004-7204.2003.05.003
[20] 王爱荣,王跃,唱桂凤. Maxwell Stefan方程在多孔结构内传质方面的应用[J]. 山东理工大学学报(自然科学版),2004,18(3):10.105. doi:10.3969/j.issn.1672-6197.2004.03.024 WANG Airong, WANG Yue, CHANG Guifeng. MaxwellStefan equation to mass transfer in porous structure[J]. Journal of Shandong University of Technology (Natural Science Edition), 2004, 18(3):10.105. doi:10.3969/j.issn.1672-6197.2004.03.024

超临界CO₂在致密油藏中的扩散前缘预测

Predicting the Diffusive Front of Supercritical CO₂ in Tight Oil Reservoirs

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价

[1]	宋传真, 朱桂良, 刘中春. 缝洞型油藏氮气扩散系数测定及影响因素[J]. 西南石油大学学报(自然科学版), 2020, 42(4): 95-103.
[2]	周明, 廖茂, 韩宏昌, 肖阳, 李辰. 页岩气低伤害超临界CO₂凝胶压裂液研究[J]. 西南石油大学学报(自然科学版), 2019, 41(6): 100-105.
[3]	胡德高, 郭肖, 郑爱维, 舒志国, 张柏桥. 页岩气藏压裂井产能评价及分析[J]. 西南石油大学学报(自然科学版), 2019, 41(6): 132-138.
[4]	魏兵, 宋涛, 赵金洲, 卡杰特·瓦列里, 蒲万芬. 溶解气回注提高致密油藏采收率效果及敏感性[J]. 西南石油大学学报(自然科学版), 2019, 41(5): 85-95.
[5]	张智, 宋闯, 窦雪锋, 杨昆, 丁剑. CO₂吞吐井套管腐蚀规律及极限吞吐轮次研究[J]. 西南石油大学学报(自然科学版), 2019, 41(4): 135-143.
[6]	刘忠群. 泾河油田裂缝型致密油藏地质特征及开发对策[J]. 西南石油大学学报(自然科学版), 2019, 41(2): 23-32.
[7]	陈强, 孙雷, 潘毅, 高玉琼. 页岩纳米孔内超临界CO₂、CH₄传输行为实验研究[J]. 西南石油大学学报(自然科学版), 2018, 40(5): 154-162.
[8]	杨正明, 马壮志, 肖前华, 郭和坤, 骆雨田. 致密油藏岩芯全尺度孔喉测试方法及应用[J]. 西南石油大学学报(自然科学版), 2018, 40(3): 97-104.
[9]	周拓, 刘学伟, 王艳丽, 秦春光, 盖长城. 致密油藏水平井分段压裂CO₂吞吐实验研究[J]. 西南石油大学学报(自然科学版), 2017, 39(2): 125-131.
[10]	杨正明*，骆雨田，何英，郭和坤，赵玉集. 致密砂岩油藏流体赋存特征及有效动用研究[J]. 西南石油大学学报(自然科学版), 2015, 37(3): 85-92.
[11]	姜瑞忠，徐建春*，傅建斌. 致密油藏多级压裂水平井数值模拟及应用[J]. 西南石油大学学报(自然科学版), 2015, 37(3): 45-52.
[12]	郭平;汪周华;沈平平;杜建芬. 高温高压气体－原油分子扩散系数研究[J]. 西南石油大学学报(自然科学版), 2010, 32 (1): 73-79.
[13]	赵会军;刘凯;李俊玲. 生物法应用于脱除硫化氢的实验研究[J]. 西南石油大学学报(自然科学版), 2010, 32 (1): 125-129.
[14]	张国强孙雷孙良田吴应川郭肖杜志敏. 小断块油藏CO^₂单井吞吐强化采油可行性研究[J]. 西南石油大学学报(自然科学版), 2006, 28(3): 61-66.
[15]	张颖; 李春福; 王斌. 超临界C 02对钢材的腐蚀实验研究[J]. 西南石油大学学报(自然科学版), 2006, 28(2): 92-96.