Improving the Recovery Efficiency and Sensitivity of Tight Oil Reservoirs by Dissolved Gas Reinjection

doi:10.11885/j.issn.1674-5086.2019.07.06.01

Abstract

Abstract: To address the rapid decline in production of horizontal wells in tight oil reservoirs and low recovery of the depletion development mode, a method for improving oil recovery by reinjected dissolved gas in the late stage of depletion development is proposed. Based on the geological reservoir characteristics of the Baikouquan Formation in the Manas Lake Depression, Xinjiang, a multi-stage fracturing bilevel well mechanism model for tight oil reservoirs was established. The production characteristics and sensitivity of the above methods in tight oil reservoirs were systematically studied. The results show that dissolved gas reinjection can effectively improve the recovery efficiency of tight oil reservoirs and alleviate the rate of decline in horizontal-well production. The degree of recovery increases with the injection volume, injection speed, and huff-n-puff rounds. The diffusion of gas molecules can increase the scope of the matrix response and increase the action radius of the gas. Using dissolved gas for a weak heterogeneous reservoir (variation coefficient of 0.2) to enhance oil recovery can achieve the best effect. Sensitivity analysis demonstrates that the number of huff-n-puff rounds is the most important factor in increasing recovery with dissolved gas reinjection, followed by injection time, injection speed, diffusion coefficient, and soak time. In addition, the proposed model can accurately predict and optimize the oil recovery from tight oil reservoirs by dissolved gas reinjection.

Key words: Manas Lake Depression, tight oil reservoir, reinjected dissolved gas, numerical simulation, sensitivity analysis

CLC Number:

TE357.7

WEI Bing, SONG Tao, ZHAO Jinzhou, VALERIY Kadet, PU Wanfen. Improving the Recovery Efficiency and Sensitivity of Tight Oil Reservoirs by Dissolved Gas Reinjection[J]. 西南石油大学学报(自然科学版), 2019, 41(5): 85-95.

0
/ / Recommend

Add to citation manager EndNote|Ris|BibTeX

URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2019.07.06.01

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2019/V41/I5/85

References

[1] 邹才能,陶士振,侯连华,等. 非常规油气地质[M]. 北京:地质出版社, 2011. ZOU Caineng, TAO Shizhen, HOU Lianhua, et al. Unconventional hydrocarbon geology[M]. Beijing:Geological Publishing House, 2011.
[2] 孙赞东,贾承造,李相方. 非常规油气勘探与开发(上册)[M]. 北京:石油工业出版社, 2011. SUN Zandong, JIA Chengzao, LI Xiangfang. Unconventional oil and gas exploration and development (volume one)[M]. Beijing:Petroleum Industry Press, 2011.
[3] 贾承造,邹才能,李建忠,等. 中国致密油评价标准、主要类型、基本特征及资源前景[J]. 石油学报, 2012, 33(3):343-350. doi:10.7623/syxb201203001 JIA Chengzao, ZOU Caineng, LI Jianzhong, et al. Assessment criteria, main types, basic features and resource prosepects of the tight oil China[J]. Acta Petrolei Sinica, 2012, 33(3):343-350. doi:10.763/syxb201203001
[4] 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.
[5] 童晓光,张光亚,王兆明,等. 全球油气资源潜力与分布[J]. 石油勘探与开发, 2018, 45(4):727-736. doi:10.11698/PED.2018.04.19 TONG Xiaoguang, ZHANG Guangya, WANG Zhaoming, et al. Distribution and potential of global oil and gas resources[J]. Petroleum Exploration and Development, 2018, 45(4):727-736. doi:10.11698/PED.2018.04.19
[6] 曾凡辉,郭建春,徐严波,等. 压裂水平井产能影响因素[J]. 石油勘探与开发, 2007, 34(4):474-477, 482. doi:10.3321/j.issn:1000-0747.2007.04.016 ZENG Fanhui, GUO Jianchun, XU Yanbo, et al. Factors affecting production capacity of fractured horizontal wells[J]. Petroleum Exploration and Development, 2007, 34(4):474-477, 482. doi:10.3321/j.issn:1000-07-47.2007.04.016
[7] YU W, LASHGAR H, SEPEHRNOORI K. Simulation study of CO₂ huff-n-puff process in Bakken tight oil reservoirs[C]. SPE 169575-MS, 2014. doi:10.2118/169575-MS
[8] WEI B, ZHANG X, WU R, et al. Pore-scale monitoring of CO₂ and N₂ flooding processes in a tight formation under reservoir conditions using nuclear magnetic resonance (NMR):A case study[J]. Fuel, 2019, 246:34-41. doi:10.1016/j.fuel.2019.02.103
[9] 秦积舜,韩海水,刘晓蕾. 美国CO₂ 驱油技术应用及启示[J]. 石油勘探与开发, 2015, 42(2):209-216. doi:10.11698/PED.2015.02.10 QIN Jishun, HAN Haishui, LIU Xiaolei. Application and enlightenment of carbon dioxide flooding in the United States of America[J]. Petroleum Exploration and Development, 2015, 42(2):209-216. doi:10.11698/PED.2015.-02.10
[10] 郭平,孙雷,孙良田,等. 不同种类气体注入对原油物性的影响研究[J]. 西南石油学院学报, 2000, 22(3):57-64. doi:10.3863/j.issn.1674-5086.2000.03.015 GUO Ping, SUN Lei, SUN Liangtian, et al. Influences of injection gas on physical behavior of crude[J]. Journal of Southwest Petroleum University, 2000, 22(3):57-64. doi:10.3863/j.issn.1674-5086.2000.03.015
[11] YOLO B N, AGBOR Y, PU H. Ethane flooding as an alternative to CO₂ injection in tight formations:A Bakken case study[C]. URTEC 2897170-MS, 2018. doi:10.15530/URTEC-2018-2897170
[12] ZULOAGA P, YU W, MIAO J, et al. Performance evaluation of CO₂ huff-n-puff and continuous CO₂ injection in tight oil reservoirs[J]. Energy, 2017, 134:181-192. doi:10.1016/j.energy.2017.06.028
[13] 战菲,宋考平,尚文涛,等. 低渗透油藏单井CO₂ 吞吐参数优选研究[J]. 特种油气藏, 2010, 17(5):70-72. doi:10.3969/j.issn.1006-6635.2010.05.019 ZHAN Fei, SONG Kaoping, SHANG Wentao, et al. Parameter optimization of single well CO₂ huff and puff for low permeability reservoir[J]. Special Oil & Gas Reservoirs, 2010, 17(5):70-72. doi:10.3969/j.issn.1006-6635.-2010.05.019
[14] ZHANG X, WEI B, SHANG J, 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
[15] 吴润楠,魏兵,邹鹏,等. 超临界CO₂ 对普通稠油和超稠油物性的影响规律[J]. 油田化学, 2018, 35(3):440-446. doi:10.19346/j.cnki.1000-4092.2018.03.012 WU Runnan, WEI Bing, ZOU Peng, et al. Effect of supercritical CO₂ on the physical properties of conventional heavy oil and extra-heavy oil[J]. Oilfield Chemistry, 2018, 35(3):440-446. doi:10.19346/j.cnki.1000-4092.-2018.03.012
[16] WEI B, ZHANG X, WU R, et al. Production response to supercritical CO₂ cyclic injection SCCI and CO₂ sequestration potential in a tight reservoir, China[C]. SPE 188765-MS, 2017. doi:10.2118/188765-MS
[17] 李东东,侯吉瑞,赵凤兰,等. 二氧化碳在原油中的分子扩散系数和溶解度研究[J]. 油田化学, 2009, 26(4):405-408. doi:10.19346/j.cnki.1000-4092.2009.04.016 LI Dongdong, HOU Jirui, ZHAO Fenglan, et al. Study of molecular diffusion coefficients and solubility of carbon dioxide in a Jinlin crude oil[J]. Oilfield Chemistry, 2009, 26(4):405-408. doi:10.19346/j.cnki.1000-4092.-2009.04.016
[18] WEI Bing, LU Laiming, PU Wanfen, et al. Production dynamics of CO₂ cyclic injection and CO₂ sequestration in tight porous media of Lucaogou Formation in Jimsar Sag[J]. Journal of Petroleum Science & Engineering, 2017, 157:1084-1094. doi:10.1016/j.petrol.2017.08.023
[19] 李传亮. 油藏工程原理[M]. 北京:石油工业出版社, 2011. LI Chuanliang. Fundamentals of reservoir engineering[M]. Beijing:Petroleum Industry Press, 2011.
[20] MYERS RH, MONTGOMERY D C, ANDERSONCOOK C M. Response surface methodology:Process and product optimization using designed experiments[M]. New York:Wiley, 2016.