王涛,张星,马坤玉,韦雪,唐培忠,张代森
WANG Tao,ZHANG Xing,MA Kunyu,WEI Xue,TANG Peizhong,ZHANG Daisen

• 1:中国石化胜利油田分公司石油工程技术研究院

摘要(Abstract)：

胜利油田GF84区块为低渗透油藏，采出程度较低，CO_2驱是提高该区块采收率的有效措施之一。在前期开发中注采井之间已形成明显的气窜通道，现阶段亟需进行气窜封堵，提高CO_2驱波及系数，实现均衡驱替。通过分析GF84区块气窜特征与开发矛盾，将气窜类型划分为“裂缝型气窜”和“基质型气窜”，并制定了“裂缝封堵”和“基质调剖”的治理策略。在明确气窜特征的基础上，通过室内实验研发了硅盐树脂堵剂、CO_2气溶性发泡剂和高温冻胶堵剂，并形成了“硅盐树脂裂缝封堵+CO_2气溶性发泡剂、高温冻胶基质调剖”化学封堵分级调控技术。结果表明，该技术在GF84区块成功应用4口井，其中硅盐树脂裂缝封堵2口井，CO_2气溶性发泡剂基质调剖2口井，措施有效率100%，有效期在0.5 a以上。研究成果可为低渗透油田CO_2驱开发提供技术支撑。
GF84 block of Shengli Oilfield is a low permeability reservoir with low recovery, and CO_2 flooding is one of effective development methods to improve its recovery. However, in the early stage of development, obvious gas channeling channels formed between injection and production wells. At current stage,gas channeling plugging is urgently required to improve CO_2 sweep efficiency and achieve balanced displacement. By analyzing gas channeling characteristics and development contradictions in GF84 block, the types of gas channeling are divided into “fracture type gas channeling” and “matrix type gas channeling”, and governance strategies for “fracture plugging” and “matrix profile control” are formulated. On the basis of clarifying gas channeling characteristics, silicone resin plugging agent, CO_2 gas soluble foaming agent and high-temperature gel plugging agent are developed in laboratory, forming chemical plugging and grading control technique of “fracture plugging by silicone resin+matrix profile control by CO_2 gas soluble foaming agent and high-temperature gel”. This technique is successfully applied to 4 wells in GF84 block, including 2 wells treated with silicone resin for fracture plugging and 2 wells treated with CO_2 gas soluble foaming agent for matrix profile control, with stimulation efficiency reached 100% and validity period more than 0.5 a. The research provides technical support for CO_2 flooding development in low permeability oil fields.

关键词(KeyWords)： 低渗透油藏;CO_2驱;气窜;裂缝封堵;基质调剖;胜利油田
low permeability reservoir;CO_2 flooding;gas channeling;fracture plugging;matrix profile control;Shengli Oilfiled

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 王涛,张星,马坤玉,韦雪,唐培忠,张代森
WANG Tao,ZHANG Xing,MA Kunyu,WEI Xue,TANG Peizhong,ZHANG Daisen

DOI: 10.19597/J.ISSN.1000-3754.202307024

参考文献(References)：

• [1]邓振龙，王鑫，谭龙，等.玛湖凹陷致密砾岩油藏CO2异步吞吐提高采收率[J].新疆石油地质，2022,43(2):200-205.DENG Zhenlong,WANG Xin,TAN Long,et al.Enhancing oil recovery of tight conglomerate reservoirs by asynchronous CO2 huff and puff in Mahu Sag[J].Xinjiang Petroleum Geology,2022,43(2):200-205.
• [2]孙大龙，张广东，彭旭，等. CO2驱气溶性降混剂提高采收率机理实验[J].特种油气藏，2022,29(1):134-140.SUN Dalong,ZHANG Guangdong,PENG Xu,et al.Experiment on the mechanism of enhancing oil recovery by CO2 flooding with gas-soluble demixing agent[J]. Special Oil&Gas Reservoirs,2022,29(1):134-140.
• [3]闫健，佀彬凡，孙晓东，等.页岩油储层超临界CO2吞吐用气溶性表面活性剂性能评价[J].断块油气田，2023,30(4):566-571.YAN Jian,SI Binfan,SUN Xiaodong,et al.Performance evaluation of gas soluble surfactants for supercritical CO2 huff and puff in shale oil reservoirs[J].Fault-Block Oil&Gas Field,2023,30(4):566-571.
• [4]李承龙.特低渗透油藏二氧化碳驱气窜影响因素及规律[J].特种油气藏，2018,25(3):82-86.LI Chenglong. Gas channeling influencing factors and patterns of CO2-flooding in ultra-low permeability oil reservoir[J]. Special Oil&Gas Reservoirs,2018,25(3):82-86.
• [5]崔传智，闫大伟，姚同玉，等.CO2驱前缘运移规律及气窜时机预测方法：以胜利油田G89-1区块为例[J].油气藏评价与开发，2022,12(5):741-747.CUI Chuanzhi,YAN Dawei,YAO Tongyu,et al.Prediction method of migration law and gas channeling time of CO2 flooding front:A case study of G89-1 Block in Shengli Oilfield[J]. Petroleum Reservoir Evaluation and Development,2022,12(5):741-747.
• [6]朱道义，施辰扬，赵岩龙，等.二氧化碳驱化学封窜材料与方法研究进展及应用[J].新疆石油天然气，2023,19(1):65-72.ZHU Daoyi, SHI Chenyang, ZHAO Yanlong, et al. Research progress and application of chemical plugging materials and method for carbon dioxide flooding[J].Xinjiang Oil&Gas,2023,19(1):65-72.
• [7]王建波，高云丛，宗畅，等.特低渗油藏CO2非混相驱水气交替注入见效特征[J].大庆石油地质与开发，2016,35(2):116-120.WANG Jianbo, GAO Yuncong, ZONG Chang, et al.Response characteristics of CO2-immiscible-flooding WAG in the ultra-low permeability oil reservoirs[J]. Petroleum Geology&Oilfield Development in Daqing,2016,35(2):116-120.
• [8]张蒙，赵凤兰，吕广忠，等.气水交替改善CO2驱油效果的适应界限[J].油田化学，2020,37(2):279-286.ZHANG Meng,ZHAO Fenglan,LüGuangzhong,et al. Experimental study on the adaptation limit of WAG to improve CO2 flooding effect[J].Oilfield Chemistry,2020,37(2):279-286.
• [9]王曦.CO2泡沫体系性能评价及驱油实验研究[J].油气地质与采收率，2020,27(1):69-74.WANG Xi. Performance evaluation and oil displacement experiment study of CO2 foam system[J]. Petroleum Geology and Recovery Efficiency,2020,27(1):69-74.
• [10]刘雅婕，刘琦.CO2驱凝胶封窜体系研究进展[J].油气地质与采收率，2023,30(2):122-134.LIU Yajie,LIU Qi.A review of channeling blocking gel systems for CO2 flooding[J]. Petroleum Geology and Recovery Efficiency,2023,30(2):122-134.
• [11] SHEN H,YANG Z,LI X C,et al.CO2-responsive agent for restraining gas channeling during CO2 flooding in low permeability reservoirs[J].Fuel,2021,292:120306.
• [12]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):113-119.LIU Xiaobo.Application and evaluation of CO2 miscible flooding in extra-low permeability beach-bar sand reservoirs[J].Petroleum Geology and Recovery Efficiency,2020,27(3):113-119.
• [13]李金志.胜利油田低渗透油藏CO2混相驱合理注采井距研究[J].油气地质与采收率，2020,27(3):64-69.LI Jinzhi.Reasonable well spacing for CO2 miscible flooding in lowpermeability reservoirs of Shengli Oilfield[J].Petroleum Geology and Recovery Efficiency,2020,27(3):64-69.
• [14]李阳，黄文欢，金勇，等.双碳愿景下中国石化不同油藏类型CO2驱提高采收率技术发展与应用[J].油气藏评价与开发，2021,11(6):793-804.LI Yang,HUANG Wenhuan,JIN Yong,et al.Different reservoir types of CO2 flooding in Sinopec EOR technology development and application under “dual carbon” vision[J]. Petroleum Reservoir Evaluation and Development,2021,11(6):793-804.
• [15]杨勇.胜利油田特低渗透油藏CO2驱技术研究与实践[J].油气地质与采收率，2020,27(1):11-19.YANG Yong.Research and application of CO2 flooding technology in extra-low permeability reservoirs of Shengli Oilfield[J].Petroleum Geology and Recovery Efficiency,2020,27(1):11-19.
• [16]毛振强，高同，董平志，等.低渗透油藏CO2驱前缘移动规律及主控因素研究[J].科学技术创新，2023,27(11):47-53.MAO Zhenqiang, GAO Tong, DONG Pingzhi, et al. Study on CO2 flooding fronts movement law and primary control factors in low permeability reservoirs[J].Scientific and Technological Innovation,2023,27(11):47-53.
• [17]彭松水.胜利正理庄油田特低渗透油藏CO2驱气窜规律研究[J].石油天然气学报，2013,35(3):147-149,169.PENG Songshui.Gas channeling rules of CO2 flooding in extra-low permeability reservoirs in Zhenglizhuang Oilfield[J].Journal of Oil and Gas Technology,2013,35(3):147-149,169.
• [18]董传瑞，高志华，李鑫.腰英台油田CO2驱油先导试验研究[J].辽宁化工，2018,47(6):578-579,582.DONG Chuanrui,GAO Zhihua,LI Xin.Pilot study on CO2 displacement in Yaoyingtai Oilfield[J].Liaoning Chemical Industry,2018,47(6):578-579,582.
• [19]吴铁龙.二氧化碳驱气窜因素分析与泡沫封窜效果评价[J].内蒙古石油化工，2013,39(11):36-39.WU Tielong.Analysis of gas channeling factors of CO2 flooding and evaluation of channeling plugging effect of foam[J].Inner Mongolia Petrochemical Industry,2013,39(11):36-39.