黄千慧,李海波,杨正明,邢济麟,陈波,李杰,薛伟,姚兰兰,杜猛,孟焕
HUANG Qianhui,LI Haibo,YANG Zhengming,XING Jilin,CHEN Bo,LI Jie,XUE Wei,YAO Lanlan,DU Meng,MENG Huan

• 1:中国科学院大学工程科学学院
• 2:中国科学院渗流流体力学研究所
• 3:中国石油勘探开发研究院
• 4:中国石油吉林油田公司勘探开发研究院

摘要(Abstract)：

为了明确页岩（致密）油藏注CO_2吞吐开发效果，基于松辽盆地、鄂尔多斯盆地的14块页岩（致密）岩样开展了室内CO_2吞吐实验，结合核磁共振技术，获得岩样吞吐不同阶段的T2谱；通过分析不同状态下岩心内油的T2谱变化，获得CO_2吞吐采出程度与吞吐时间的关系，确定岩心注CO_2单位吞吐距离所需时间，并结合现场计算储层注CO_2吞吐的有效作用距离。结果表明：随渗透率的降低，注CO_2吞吐单位距离所需时间有明显增大的趋势；鄂尔多斯盆地岩心单位吞吐距离所需时间与渗透率时间呈对数关系，6块夹层型岩心平均吞吐作用距离1.19 cm所需时间为1.80 h；松辽盆地A区块纯页岩型岩心平均吞吐距离为1.250 cm，所需时间为39.00 h，远高于松辽盆地A区块致密油岩心的2.06 h；松辽盆地B区块纯页岩型页岩岩心平均吞吐距离为1.24 cm，所需时间为1.76 h；鄂尔多斯盆地页岩油藏在注CO_2吞吐开发一个月内，有效作用距离最高可达6.55 m，远高于松辽盆地纯页岩型油藏的0.50 m。研究成果为致密油藏储层物性评价及开发效果改善提供参考依据。
In order to clarify development effect of CO_2 injection huff-and-puff in shale(tight) oil reservoirs,laboratory CO_2 huff-and-puff experiments are carried out based on 14 shale(tight) samples from Songliao Basin and Ordos Basin.Combined with nuclear magnetic resonance technology,T2 spectra of samples at different stages of huff-andpuff are obtained.T2 spectra variation of oil within the cores in different conditions is analyzed to obtain relationship between CO_2 huff-and-puff recovery degree and huff-and-puff time,determine time required for unit distance of CO_2injection huff-and-puff in the cores,and calculate effective distance of CO_2 injection huff-and-puff in reservoirs combined with field application.The results show that time required for unit distance of CO_2 injection huff-and-puff significantly increases with permeability decrease.Time required for huff-and-puff unit distance in cores of Ordos Basin shows logarithmic relationship with permeability time.Required time for average huff-and-puff distance of1.19 cm in 6 sandwiched cores is 1.80 h.For pure shale cores of Block A in Songliao Basin,average huff-and-puff distance is 1.250 cm and required time is 39.00 h,which is much higher than 2.06 h for tight oil cores of Block A.Average huff-and-puff distance of pure shale cores of Block B in Songliao Basin is 1.24 cm and required time is1.76 h.For Ordos Basin shale reservoirs,effective distance of CO_2 injection huff-and-puff development for a month reaches 6.55 m,much higher than 0.50 m for pure shale reservoirs in Songliao Basin.The research provides reference evidence for reservoir property evaluation and development effect of tight reservoirs.

关键词(KeyWords)： 页岩油藏;致密油藏;CO_2吞吐距离;纯页岩型页岩;夹层型页岩;核磁共振
shale reservoir;tight reservoir;CO_2 huff-and-puff distance;pure shale;sandwiched shale;nuclear magnetic resonance

Abstract:

Keywords:

基金项目(Foundation): 中国石油天然气股份有限公司CCUS重大科技专项“CCUS驱油地质体精细描述及油藏工程关键技术研究”(2021ZZ01-03）;; 中国石油长庆油田公司项目“页岩油储层物性参数测试及增效吞吐开采技术研究”（2023DJ0927）

作者(Author): 黄千慧,李海波,杨正明,邢济麟,陈波,李杰,薛伟,姚兰兰,杜猛,孟焕
HUANG Qianhui,LI Haibo,YANG Zhengming,XING Jilin,CHEN Bo,LI Jie,XUE Wei,YAO Lanlan,DU Meng,MENG Huan

DOI: 10.19597/J.ISSN.1000-3754.202308063

参考文献(References)：

• [1]TORABI F,JAMALOEI B Y,ZARIVNYY O,et al.The evaluation of variable-injection rate waterflooding,immiscible CO2flooding,and water-alternating-CO2 injection for heavy oil recovery[J].Liquid Fuels Technology,2012,30(16):1656-1669.
• [2]张娟，张晓辉，张亮，等.水平井CO2吞吐增油机理及影响因素[J].油田化学，2017,34(3):475-481.ZHANG Juan,ZHANG Xiaohui,ZHANG Liang,et al.Enhanced oil recovery mechanism and influence factors of CO2 puff and huff in horizontal well[J].Oilfield Chemistry,2017,34(3):475-481.
• [3]钱卫明，林刚，王波，等.底水驱稠油油藏水平井多轮次CO2吞吐配套技术及参数评价：以苏北油田HZ区块为例[J].石油地质与工程，2020,34(1):107-111.QIAN Weiming,LIN Gang,WANG Bo,et al.Multi-cycle CO2huff and puff matching technology and parameter evaluation for horizontal wells in heavy oil reservoirs with bottom water drive:By taking HZ block of Subei oilfield as an example[J].Petroleum Geology and Engineering,2020,34(1):107-111.
• [4]YU W,LASHGARI H R,WU K,et al.CO2 injection for enhanced oil recovery in Bakken tight oil reservoirs[J].Fuel,2015,159:354-363.
• [5]王小龙，高庆贤，董双福，等.超低渗致密油藏二氧化碳吞吐合理注入参数确定[J].石油钻采工艺，2023,45(3):368-375.WANG Xiaolong,GAO Qingxian,DONG Shuangfu,et al.Determination of rational parameters for CO2 huff-n-puff in tight oil reservoirs with ultra-low permeability[J].Oil Drilling&Production Technology,2023,45(3):368-375.
• [6]范希彬，蒲万芬，单江涛，等．致密砾岩油藏CO2吞吐提高采收率可行性研究[J]．油气藏评价与开发，2021,11(6):831-836.FAN Xibin,PU Wanfen,SHAN Jiangtao,et al.Feasibility of enhanced oil recovery by CO2 huff-n-puff in tight conglomerate reservoir[J].Reservoir Evaluation and Development,2021,11(6):831-836.
• [7]朱舟元，王景鹤，董志超，等．致密油注气吞吐优化[J].科学技术与工程，2022,22(21):9115-9121.ZHU Zhouyuan,WANG Jinghe,DONG Zhichao,et al.Optimization of tight oil cyclic gas injection[J].Science Technology and Engineering,2022,22(21):9115-9121.
• [8]朱争，李鹏真，何吉波，等．延长油田南部长8致密油藏注CO2吞吐实验[J]．非常规油气，2022,9(5):117-122.ZHU Zheng,LI Pengzhen,HE Jibo,et al.Experiment of CO2huff and puff in Chang 8 tight oil reservoir,south of Yanchang Oilfield[J].Unconventional Oil&Gas,2022,9(5):117-122.
• [9]马铨峥，杨胜来，陈浩，等.致密油储集层CO2吞吐效果及影响因素分析：以新疆吉木萨尔凹陷芦草沟组为例[J].石油科学通报，2018,3(4):434-445.MA Quanzheng,YANG Shenglai,CHEN Hao,et al.Effect and influencing factors of CO2 huff and puff in a tight oil reservoir:Taking the Lucaogou formation in the Xinjiang Jimsar sag as an example[J].Petroleum Science Bulletin,2018,3(4):434-445.
• [10]LI L,WANG C W,LI D S,et al.Experimental investigation of shale oil recovery from Qianjiang core samples by the CO2 huff-npuff EOR method[J].RSC Advances,2019,9:28857-28869.
• [11]YU H Y,XU H,FU W R,et al.Extraction of shale oil with supercritical CO2:Effects of number of fractures and injection pressure[J].Fuel,2021,285:118977.
• [12]李凤霞，王海波，周彤，等.页岩油储层裂缝对CO2吞吐效果的影响及孔隙动用特征[J].石油钻探技术，2022,50(2):38-44.LI Fengxia,WANG Haibo,ZHOU Tong,et al.The influence of fractures in shale oil reservoirs on CO2 huff and puff and its pore production characteristics[J].Petroleum Drilling Techniques,2022,50(2):38-44.
• [13]PENG X,WANG Y,DIAO Y,et al.Experimental investigation on the operation parameters of carbon dioxide huff-n-puff process in ultra low permeability oil reservoirs[J].Journal of Petroleum Science and Engineering,2018,174:903-912.
• [14]贾瑞轩，孙灵辉，苏致新，等.二氧化碳吞吐致密油藏的可动用性[J].断块油气田，2020,27(4):504-508.JIA Ruixuan,SUN Linghui,SU Zhixin,et al.Availability of CO2 huff and puff in tight reservoir[J].Fault-Block Oil&Gas Field,2020,27(4):504-508.
• [15]钱坤，杨胜来，马轩，等.超低渗透油藏CO2吞吐利用率实验研究[J].石油钻探技术，2018,46(6):77-81.QIAN Kun,YANG Shenglai,MA Xuan,et al.CO2 utilization ratio simulation during a CO2 huff-and-puff process in ultra-low permeability oil reservoirs[J].Petroleum Drilling Techniques,2018,46(6):77-81.
• [16]黄兴，李响，张益，等.页岩油储集层二氧化碳吞吐纳米孔隙原油微观动用特征[J].石油勘探与开发，2022,49(3):557-564.HUANG Xing,LI Xiang,ZHANG Yi,et al.Microscopic production characteristics of crude oil in nano-pores of shale oil reservoirs during CO2 huff and puff[J].Petroleum Exploration and Development,2022,49(3):557-564.
• [17]FAKHER S,IMQAM A.Application of carbon dioxide injection in shale oil reservoirs for increasing oil recovery and carbon dioxide storage[J].Fuel,2020,265:116944.
• [18]王向阳，刘学伟，杨正明，等.注入体积对注水吞吐效果的影响[J].中国科技论文，2017,12(21):2497-2500.WANG Xiangyang,LIU Xuewei,YANG Zhengming,et al.Influence of injection volume on the effect of water injection huff and puff[J].China Science&Technology Papers,2017,12(21):2497-2500.
• [19]杨正明，刘学伟，李海波，等.致密储集层渗吸影响因素分析与渗吸作用效果评价[J].石油勘探与开发，2019,46(4):739-745.YANG Zhengming,LIU Xuewei,LI Haibo,et al.Analysis on the influencing factors of imbibition and the effect evaluation of imbibition in tight reservoirs[J].Petroleum Exploration and Development,2019,46(4):739-745.
• [20]赵清民，伦增珉，章晓庆，等.页岩油注CO2动用机理[J].石油与天然气地质，2019,40(6):1333-1338.ZHAO Qingmin,LUN Zengmin,ZHANG Xiaoqing,et al.Mechanism of shale oil mobilization under CO2 injection[J].Oil&Gas Geology,2019,40(6):1333-1338
• [21]彭东宇，唐洪明，王子逸，等.致密砾岩储层与CO2作用机理及控制因素实验研究[J].油气地质与采收率，2023,30(2):94-103.PENG Dongyu,TANG Hongming,WANG Ziyi,et al.Experimental study on reaction mechanism between tight conglomerate reservoir and CO2 and its controlling factors[J].Petroleum Geology and Recovery Efficiency,2023,30(2):94-103.
• [22]张道伟，戴城，陈硕思，等.考虑多尺度裂缝表征的致密油藏CO2吞吐智能历史拟合[J].油气地质与采收率，2022,29(1):160-167.ZHANG Daowei,DAI Cheng,CHEN Shuosi,et al.Intelligent history matching of CO2 huff-n-puff in tight oil reservoirs considering multi-scale fracture characterization[J].Petroleum Geology and Recovery Efficiency,2022,29(1):160-167.