玛湖致密砾岩注氮气驱机理及应用效果评价

doi:10.11885/j.issn.1674-5086.2021.03.23.02

摘要/Abstract

摘要： 针对玛湖致密砾岩储层采用的水平井+体积压裂衰竭开发，产量递减快的问题，分别在室内和现场开展了注氮气提高采收率研究。室内实验通过气驱相态、混相能力、驱油效果等方法评价了M区块的提高采收率潜力。实验结果表明，氮气在原油中溶解度小，驱油机理主要依靠自身的膨胀性驱油，且氮气的最小混相压力62.3 MPa，目前M区块很难达到混相驱。现场在玛湖油田M区块选择一个1注5采的井组开展注氮气先导试验，并取得了较好的效果。单井评价了产油量、油压、气油比、氮气浓度等4个参数指标的见效特征；井组分析了注气前和注气过程中产量的变化，累增油1 953 t。最后结合地质和工程认识，总结了影响注气效果的主控因素。本次注氮气应用效果显著，验证了致密砾岩储层水平井+体积压裂注氮气提高采收率是一项可行的技术。

关键词: 玛湖油田, 致密砾岩, 提高采收率, 先导试验, 最小混相压力, 效果评价

Abstract: In order to solve the problem of rapid production decline caused by horizontal well + volume fracturing in Mahu tight conglomerate reservoir, nitrogen injection was carried out in laboratory and field to enhance oil recovery. The EOR potential of Block M is evaluated by gas drive phase behavior, miscibility and oil displacement effect. The experimental results show that the solubility of nitrogen in crude oil is small that the displacement mechanism mainly depends on its own expansibility, and that the minimum miscible pressure of nitrogen is 62.3 MPa, so it is difficult to achieve miscible flooding in Block M. A pilot test of nitrogen injection was carried out in Block M of Mahu Oilfield, and good results were obtained. The effective characteristics of oil production, oil pressure, gas oil ratio and nitrogen concentration were studied and evaluated; the change of production before and during gas injection for well group is analyzed. The increase of a total of 1 953 t of oil is obtained. Finally, based on the geological and engineering data, the main controlling factors affecting gas injection effect are systematically evaluated, which proves that horizontal well + volume fracturing nitrogen injection is a feasible technology to enhance oil recovery in tight conglomerate reservoir.

Key words: Mahu Oilfield, tight conglomerate, EOR, pilot test, minimum miscibility pressure, impact assessment

中图分类号:

TE341

李浩楠, 宋平, 朱亚婷, 谭龙, 张记刚. 玛湖致密砾岩注氮气驱机理及应用效果评价[J]. 西南石油大学学报(自然科学版), 2021, 43(5): 203-211.

LI Haonan, SONG Ping, ZHU Yating, TAN Long, ZHANG Jigang. Mechanism and Application Effect Evaluation of Nitrogen Flooding in Mahu Tight Conglomerate[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2021, 43(5): 203-211.

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.1674-5086.2021.03.23.02

http://journal15.magtechjournal.com/Jwk_xnzk/CN/Y2021/V43/I5/203

参考文献

[1] 李国欣,覃建华,鲜成钢,等. 致密砾岩油田高效开发理论认识、关键技术与实践——以准噶尔盆地玛湖油田为例[J]. 石油勘探与开发,2020,47(6):1-13. doi:10.11698/PED.2020.06.11 LI Guoxin, QIN Jianhua, XIAN Chenggang, et al. Theoretical understandings, key technologies and practices of tight conglomerate oilfield efficient development:A case study of the Mahu Oilfield, Junggar Basin, NW China[J]. Petroleum Exploration and Development, 2020, 47(6):1-13. doi:10.11698/PED.2020.06.11
[2] 陶文. 温西一区块氮气泡沫驱提高采收率技术研究[J]. 石化技术,2018,25(4):136-137. doi:10.3969/j.issn.1006-0235.2018.04.109 TAO Wen. EOR enhancement by nitrogen foam flooding in Wenxi-1 District[J]. Petrochemical Industry Technology, 2018, 25(4):136-137. doi:10.3969/j.issn.1006-0235.2018.04.109
[3] 李满亮,周洪涛,张莹,等. 塔河油田井组注氮气提高采收率技术[J]. 石油钻采工艺,2016,38(3):392-394. doi:10.13639/j.odpt.2016.03.022 LI Manliang, ZHOU Hongtao, ZHANG Ying, et al. Enhancing oil recovery by nitrogen injection in well group of Tahe Oilfield[J]. Oil Drilling & Production Technology, 2016, 38(3):392-394. doi:10.13639/j.odpt.2016.03.022
[4] 黄代国. 雁翎油田注氮气增产机理的实验评价[J]. 石油学报,1992,13(4):67-75. HUANG Daiguo. Laboratory evaluation of the mechanism of the increased oil recoverywith nitrogen injection for Yanling Oilfield[J]. Acta Petrolei Sinica, 1992, 13(4):67-75.
[5] 曹鹏,朱永峰,戴传瑞,等. 强底水白云岩油藏注氮气非混相驱数值模拟[J]. 断块油气田,2016,23(2):202-205. doi:10.6056/dkyqt201602015 CAO Peng, ZHU Yongfeng, DAI Chuanrui, et al. Numerical simulation of immiscible nitrogen flooding for dolomite reservoirs with strong bottom water[J]. Fault-Block Oil and Gas Field, 2016, 23(2):202-205. doi:10.6056/dkyqt201602015
[6] 林健. 潜山油藏氮气气驱技术应用[J]. 化工管理,2017(7):99. doi:10.3969/j.issn.1008-4800.2017.07.055 LIN Jian. Application of nitrogen gas drive technology in buried hill reservoir[J]. Chemical Enterprise Management, 2017(7):99. doi:10.3969/j.issn.1008-4800.2017.07.055
[7] 刘小波. CO₂混相驱技术在特低渗透滩坝砂油藏的开发实践及效果评价[J]. 油气地质与采收率,2020,27(3):117-123. doi:10.13673/j.cnki.cn37-1359/te.2020.03.015 LIU Xiaobo. Application and evaluation of CO₂ miscible flooding in extra-low permeability bench-bar sand reservoir reservoirs[J]. Petroleum Geology and Recovery Efficiency, 2020, 27(3):117-123. doi:10.13673/j.cnki.cn37-1359/te.2020.03.015
[8] 尹太恒,赵冀,唐永亮,等. 注氮气控制底水锥进实验研究[J]. 石油化工高等学校学报,2017,30(3):50-55. doi:10.3969/j.issn.1006-396X.2017.03.009 YIN Taiheng, ZHAO Ji, TANG Yongliang, et al. Experiment study on nitrogen injection for controlling bottom water coning[J]. Journal of Petrochemical Universities, 2017, 30(3):50-55. doi:10.3969/j.issn.1006-396X.2017.03.009
[9] 惠健,刘学利,汪洋,等. 塔河油田缝洞型油藏单井注氮气采油机理及实践[J]. 新疆石油地质,2015,36(1):75-77. doi:10.7657/XJPG20150114 HUI Jian, LIU Xueli, WANG Yang, et al. Mechanism and practice of nitrogen injection for EOR in fractured-vuggy carbonate reservoir in Tahe Oilfield, Tarim Basin[J]. Xinjiang Petroleum Geology, 2015, 36(1):75-77. doi:10.7657/XJPG20150114
[10] 李轶超,姚先荣,王长权,等. X油藏注气混相驱可行性实验研究[J]. 石油与天然气化工,2020,46(4):63-66. doi:10.3969/j.issn.1007-3426.2017.04.012 LI Yichao, YAO Xianrong, WANG Changquan, et al. Feasibility experimental researcher miscible flooding of X reservoir by gas injection[J]. Chemical Engineering of Oil & Gas, 2020, 46(4):63-66. doi:10.3969/j.issn.1007-3426.2017.04.012
[11] 刘学利,胡文革,谭涛,等. 塔河底水砂岩油藏氮气泡沫驱技术研究[J]. 西南石油大学学报(自然科学版),2016,38(6):105-110. doi:10.11885/j.issn.16745086.2015.01.19.02 LIU Xueli, HU Wenge, TAN Tao, et al. Researches on nitrogen foam flooding technology in the Tahe Triassic sandstone reservoir[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2016, 38(6):105-110. doi:10.11885/j.issn.16745086.2015.01.19.02
[12] 张慧,鞠斌山,李俊健,等. 缝洞型油藏单井注氮气见效特征[J]. 中国科技论文,2017,12(21):2464-2468. doi:10.3969/j.issn.2095-2783.2017.21.011 ZHANG Hui, JU Binshan, LI Junjian, et al. Study on the effective characteristics of single-well nitrogen injection in fractured-vug reservoir[J]. China Sciencepaper, 2017, 12(21):2464-2468. doi:10.3969/j.issn.2095-2783.2017.21.011
[13] 娄兆彬,杨朝光,王志鹏,等. 中原油田高压低渗油藏注氮气效果及其分析[J]. 西部探矿工程,2005,17(2):64-65. doi:10.3969/j.issn.1004-5716.2005.02.036 LOU Zhaobin, YANG Chaoguang, WANG Zhipeng, et al. Nitrogen injection effect and its analysis in high pressure and low permeability reservoir of Zhongyuan Oilfield[J]. West-China Exploration Engineering, 2005, 17(2):64-65. doi:10.3969/j.issn.1004-5716.2005.02.036
[14] 张永昌,李相方,孙政,等. 凝析气藏注气开发气窜量化评价方法及应用[J]. 石油钻采工艺,2017,39(6):667-672. doi:10.13639/j.odpt.2017.06.001 ZHANG Yongchang, LI Xiangfang, SUN Zheng, et al. An quantitative evaluation method for gas channeling in the process of gas injection development of condensate gas reservoirs and its application[J]. Oil Drilling & Production Technology, 2017, 39(6):667-672. doi:10.13639/j.odpt.2017.06.001
[15] 刘刚. 致密油体积压裂水平井CO₂吞吐注采参数优化[J]. 石油地质与工程,2020,34(2):90-93. doi:10.3969/j.issn.1673-8217.2020.02.019 LIU Gang. Optimization of injection production parameters of CO₂ huff and puff by horizontal wells with volume fracturing in tight oil[J]. Petroleum Geology and Engineering, 2020, 34(2):90-93. doi:10.3969/j.issn.1673-8217.2020.02.019
[16] 任波. 陕北特低渗透油藏注氮气提高采收率数值模拟研究——以西区油田旦八区块为例[D]. 西安:西安石油大学,2012. REN Bo. Enhance recovery by numerical modeling of nitrogen injection in ultra-low permeability oil field:Take the west area of Danba Block as an example[D]. Xi'an:Xi'an Petroleum University, 2012.
[17] 李文峰. 冀东油田氮气采油相关技术适应性研究[D]. 北京:中国石油大学(北京),2018. LI Wenfeng. Study on the mechanism of nitrogen recovery and its adaptability evaluation[D]. Beijing:China University of Petroleum, 2018.
[18] 吕铁,刘中春. 缝洞型油藏注氮气吞吐效果影响因素分析[J]. 特种油气藏,2015,22(6):114-117. doi:10.3969/j.issn.1006-6535.2015.06.026 LÜ Tie, LIU Zhongchun. Analysis on influential factors of nitrogen huff and puff effect in fracture-vug type reservoir[J]. Special Oil and Gas Reservoirs, 2015, 22(6):114-117. doi:10.3969/j.issn.1006-6535.2015.06.026
[19] 苏伟,侯吉瑞,郑泽宇,等. 缝洞型油藏注氮气提高采收率效果及其影响因素分析[J]. 石油科学通报,2017,2(3):390-398. doi:10.3969/j.issn.2096-1693.2017.03.036 SU Wei, HOU Jirui, ZHENG Zeyu, et al. The mechanisms and influencing factors analysis of activating the remaining oil by N₂ flooding in fractured-cavity reservoirs[J]. Petroleum Science Bulletin, 2017, 2(3):390-398. doi:10.3969/j.issn.2096-1693.2017.03.036