孔凡顺,李延军,郭天娇,刘建栋,南金浩
KONG Fanshun,LI Yanjun,GUO Tianjiao,LIU Jiandong,NAN Jinhao

• 1:国家能源陆相砂岩老油田持续开采研发中心
• 2:中国石油大庆油田有限责任公司勘探开发研究院

摘要(Abstract)：

海拉尔油田高倾角油藏石油探明地质储量规模大，地层倾角超过10°以上的储量占总探明地质储量的68.6%。受构造高差的影响，常规注水开发难以实现构造顶底部位油井均衡驱替，边底部油井含水率上升快，构造高部位油井受效差，整体开发效果不理想。针对海拉尔油田高倾角断块油藏水驱开发效果差的问题，以注CO_2重力驱油实验为基础，以油藏数值模拟为手段，开展注CO_2重力驱油机理、影响因素及适用性研究。结果表明：当以原始地层压力10.57 MPa注入1.2 PV的CO_2时，CO_2驱油效率可达55.9%，能大幅度提高高倾角断块油藏的采收率；地层倾角、储层渗透率、注气速度是影响注CO_2重力驱效果的主要因素；海拉尔油田有4 411.35×104 t石油探明地质储量适合开展注CO_2重力驱开发，注CO_2重力驱技术在海拉尔油田具有广阔的应用前景。
High-dip reservoirs in Hailar Oilfield have large amount of proved OOIP, and reserves with stratigraphic dip of >10° account for 68.6% of the total proved OOIP. Affected by structural relief, conventional water flooding development cannot realize balanced displacement of wells in top and bottom of structure. Water cut in producers at the edge and bottom increases rapidly, while producers in structural high get less response, with ineffective overall development. Aiming at the problem of poor water flooding development effect of high-dip fault block reservoir in Hailar Oilfield, based on laboratory oil displacement experiment of CO_2 gravity drainage and using reservoir numerical simulation method, the mechanism, influencing factors and applicability of CO_2 gravity drainage are studied.The results show that CO_2 displacement efficiency reaches 55.9% with 1.2 PV CO_2 injected at initial formation pressure of 10.57 MPa, greatly improving the recovery of high-dip fault block reservoir. Stratigraphic dip, reservoir permeability and gas injection rate are the main factors affecting the effect of CO_2 gravity drainage. Hailar Oilfield has 4 411.35×104 t of proved OOIP suitable for gravity drainage development. CO_2 gravity drainage technology has broad application prospects in Hailar Oilfield.

关键词(KeyWords)： 注CO_2重力驱;数值模拟;驱油效率;高倾角断块油藏
CO_2 gravity drainage;numerical simulation;oil displacement efficiency;high-dipfault block reservoir

Abstract:

Keywords:

基金项目(Foundation): 中国石油天然气股份有限公司重大科技专项“松辽盆地（大庆、吉林）CCUS技术集成与工业化试验”（2021ZZ01-08）

作者(Author): 孔凡顺,李延军,郭天娇,刘建栋,南金浩
KONG Fanshun,LI Yanjun,GUO Tianjiao,LIU Jiandong,NAN Jinhao

DOI: 10.19597/j.issn.1000-3754.202302026

参考文献(References)：

• [1]张海龙.CO2混相驱提高石油采收率实践与认识[J].大庆石油地质与开发，2020,39(2):114-119.ZHANG Hailong. Practice and understanding of enhancing the oilrecovery by CO2 miscible flooding[J]. Petroleum Geology&Oilfield Development in Daqing,2020,39(2):114-119.
• [2]张蕾.CO2-EOR技术在美国的应用[J].大庆石油地质与开发，2011,30(6):153-158.ZHANG Lei.Application of CO2-EOR technique in America[J].Petroleum Geology&Oilfield Development in Daqing,2011,30(6):153-158.
• [3]李阳.低渗透油藏CO2驱提高采收率技术进展及展望[J].油气地质与采收率，2020,27(1):1-10.LI Yang.Technical advancement and prospect for CO2 flooding enhanced oil recovery in low permeability reservoirs[J].Petroleum Geology and Recovery Efficiency,2020,27(1):1-10.
• [4]江怀友，沈平平，卢颖，等. CO2提高世界油气资源采收率现状研究[J].特种油气藏，2010,17(2):5-10,120.JIANG Huaiyou,SHEN Pingping,LU Ying,et al. Present situation of enhancing hydrocarbon recovery factor by CO2[J].Special Oil&Gas Reservoirs,2010,17(2):5-10,120.
• [5]郭平，张陈珺，熊健，等.气体辅助重力驱油（GAGD）研究进展[J].科学技术与工程，2015,15(5):176-184.GUO Ping,ZHANG Chenjun,XIONG Jian,et al.Present state of gas-assisted gravity drainage[J]. Science Technology and Engineering,2015,15(5):176-184.
• [6]冯科文，穆朗枫，阎逸群，等.气体辅助重力驱提高采收率数值模拟[J].大庆石油地质与开发，2020,39(4):77-86.FENG Kewen, MU Langfeng, YAN Yiqun, et al. Numerical simulation of the enhanced oil recovery by gas-assisted gravity drainage(GAGD)[J].Petroleum Geology&Oilfield Development in Daqing,2020,39(4):77-86.
• [7]何应付，高慧梅，周锡生．改善特低渗透油藏注二氧化碳驱油效果的方法[J]．断块油气田，2011,18(4):512-515.HE Yingfu,GAO Huimei,ZHOU Xisheng. Study on method for improving displacement effect of CO2 drive in extra-low permeability reservoir[J]. Fault-Block Oil&Gas Field,2011,18(4):512-515.
• [8]吴忠宝，甘俊奇，曾倩.低渗透油藏二氧化碳混相驱油机理数值模拟[J].油气地质与采收率，2012,19(3):67-70.WU Zhongbao,GAN Junqi,ZENG Qian. Numerical simulation of CO2 miscible flooding in low-permeability oil reservoir[J].Petroleum Geology and Recovery Efficiency, 2012, 19(3):67-70.
• [9]郭平，周耐强，张茂林，等.任11碳酸盐岩油藏注CO2提高采收率研究[J]．西南石油大学学报（自然科学版），2012,34(2):180-183.GUO Ping, ZHOU Naiqiang, ZHANG Maolin, et al. Study on EOR by carbon dioxide injection process in R11 carbonate reservoir[J].Journal of Southwest Petroleum University(Science&Technology Edition),2012,34(2):180-183.
• [10]张本艳，党文斌，王少朋，等.鄂尔多斯盆地红河油田长8储层致密砂岩油藏注CO2提高采收率[J].石油与天然气地质，2016,37(2):272-275.ZHANG Benyan,DANG Wenbin,WANG Shaopeng,et al.CO2-EOR in Chang 8 tight sandstone reservoir of Honghe oilfield in Ordos Basin[J].Oil&Gas Geology,2016,37(2):272-275.
• [11]敖文君，孔丽萍，王成胜，等.高含水油藏注气驱提高采收率技术研究[J].复杂油气藏，2016,9(4):52-57.AO Wenjun, KONG Liping, WANG Chengsheng, et al. Study on enhanced oil recovery in high water-cut reservoir by gas flooding[J]. Complex Hydrocarbon Reservoirs, 2016, 9(4):52-57.
• [12]侯冬青，刘小芩，郑伟涛，等.塔里木盆地东河1油田石炭系油藏注气开发气油比上升问题及对策[J].大庆石油地质与开发，2022,41(2):51-58.HOU Dongqing,LIU Xiaoqin,ZHENG Weitao,et al.Problems and countermeasures of gas-oil ratio rise in gas injection development of Carboniferous oil reservoirs in Oilfield Donghe-1 of Tarim Basin[J]. Petroleum Geology&Oilfield Development in Daqing,2022,41(2):51-58.
• [13]袁少民.特低渗透油藏CO2驱油调整技术界限[J].大庆石油地质与开发，2019,38(4):117-123.YUAN Shaomin. Technical limits for the adjustment of the CO2flooding in ultra-low permeability oil reservoirs[J]. Petroleum Geology&Oilfield Development in Daqing, 2019, 38(4):117-123.
• [14]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.
• [15]杨超，李彦兰，韩洁，等.顶部注气油藏定量评价筛选方法[J].石油学报，2013,34(5):938-946.YANG Chao, LI Yanlan, HAN Jie, et al. Quantitative evaluation and screening method for gas assisted gravity drainage reservoirs[J].Acta Petrolei Sinica,2013,34(5):938-946.
• [16]周炜，张建东，唐永亮，等.顶部注气重力驱技术在底水油藏应用探讨[J].西南石油大学学报（自然科学版），2017,39(6):92-100.ZHOU Wei,ZHANG Jiandong,TANG Yongliang,et al.Application of top gas injection-assisted gravity drainage in bottom water reservoirs[J]. Journal of Southwest Petroleum University(Science&Technology Edition),2017,39(6):92-100.
• [17]刘维霞，吴义志，李文静，等.断块油藏气顶-边水双向驱油藏筛选标准[J].特种油气藏，2016,23(1):104-108.LIU Weixia,WU Yizhi,LI Wenjing,et al.Screening criteria of gas cap-edge water drive fault block oil reservoir[J]. Special Oil&Gas Reservoirs,2016,23(1):104-108.
• [18]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，2016,16(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, 2016,16(33):179-183.
• [19]张艳玉，王康月，李洪君，等.气顶油藏顶部注氮气重力驱数值模拟研究[J].中国石油大学学报（自然科学版），2006,30(4):58-62.ZHANG Yanyu, WANG Kangyue, LI Hongjun, et al.Study of numerical simulation for gravity drive of crestal nitrogen injection in gas-cap reservoir[J].Journal of China University of Petroleum(Edition of Natural Science),2006,30(4):58-62.
• [20]高建，杨思玉，袁永文，等.气体辅助重力泄油技术驱替机制及控制因素[J].地质科技情报，2013,32(6):80-85.GAO Jian,YANG Siyu,YUAN Yongwen,et al.Mechanism and controlling factors of GAGD technology[J].Geological Science and Technology Information,2013,32(6):80-85.
• [21]李承龙，韩昊．用灰色模糊综合评估法识别注气初期CO2气窜通道[J].大庆石油地质与开发，2018, 37(6):116-120.LI Chenglong,HAN Hao.Identification of the gas channeling by grey-fuzzy complex judging method at the early state of CO2 flooding[J].Petroleum Geology&Oilfield Development in Daqing,2018,37(6):116-120.