高盐油藏大尺度优势通道封堵剂组成优化及性能评价——以吐哈雁木西油田为例
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摘要
吐哈雁木西油藏具有储层非均质性严重和岩石胶结强度低等特点,长期注水开发已形成水流优势通道,现有封堵剂难以满足封堵强度要求。为解决吐哈雁木西油田注水低效和无效循环问题,以无机化学、物理化学和油藏工程等为理论指导,以仪器检测、化学分析和物理模拟等为技术手段,以雁木西油藏储层岩石结构特征和流体等为模拟对象,开展了高盐疏松砂岩油藏大尺度优势通道封堵剂组成优化及性能评价。结果表明,无机地质聚合物凝胶封堵剂各组成对成胶时间影响主次次序:缓凝剂→增黏剂→主剂,成胶时间为13～62 h;无机地质聚合物凝胶成胶后为固体,呈现致密微观孔隙结构,具有抗压强度高、渗透性差和"堵大不堵小"等特点,尤其适合因储层岩石胶结强度低和长期高强度注水冲刷破坏作用而形成的大尺度优势通道封堵;从技术经济角度考虑,优选了无机地质聚合物凝胶组分。研究成果将为大孔道治理技术决策提供实验依据。
Tuha Yanmuxi oil reservoirs are characterized by serious reservoir heterogeneity, low-strength rock cementation and so on, the long-term waterflooding development has formed the dominant channels of the water flow, and the existing plugging agents cannot meet the requirements of the plugged strength. In order to solve the problems of low-efficiency water injection and inefficient water cycle in Yanmuxi Oilfield, theoretically guided by inorganic chemistry, physical chemistry, reservoir engineering and so forth, by means of the following technical methods: instrumental testing, chemical analysis, physical simulation and so on, taking the reservoir rock characteristics and fluids as the simulating objects, the composition optimization and performance evaluation of the plugging agent for the large-scale dominant channels in the high-salinity unconsolidated sandstone oil reservoir were carried out. The results show that the influencing order of each composition of the inorganic geopolymer gel plugging agent on the speed of the gelation is: retarder→tackifier→main agent, the curing time range from 13 hours to 62 hours;the inorganic geopolymer gel becomes solid after gelling and exhibits microscopic pore structure, which is characterized by high compressive strength, poor permeability and "blocking large and not blocking small", especially suitable for plugging large-scale dominant channels due to the low cementation strength of the reservoir rocks and long-term high-intensity injection and flushing damage;from the viewpoint of the technology and economy, the compositions of the inorganic geopolymer gel have been optimized.The research results will provide the experimental evidences for the technical decision-making of the high-capacity control.
Tuha Yanmuxi oil reservoirs are characterized by serious reservoir heterogeneity, low-strength rock cementation and so on, the long-term waterflooding development has formed the dominant channels of the water flow, and the existing plugging agents cannot meet the requirements of the plugged strength. In order to solve the problems of low-efficiency water injection and inefficient water cycle in Yanmuxi Oilfield, theoretically guided by inorganic chemistry, physical chemistry, reservoir engineering and so forth, by means of the following technical methods: instrumental testing, chemical analysis, physical simulation and so on, taking the reservoir rock characteristics and fluids as the simulating objects, the composition optimization and performance evaluation of the plugging agent for the large-scale dominant channels in the high-salinity unconsolidated sandstone oil reservoir were carried out. The results show that the influencing order of each composition of the inorganic geopolymer gel plugging agent on the speed of the gelation is: retarder→tackifier→main agent, the curing time range from 13 hours to 62 hours;the inorganic geopolymer gel becomes solid after gelling and exhibits microscopic pore structure, which is characterized by high compressive strength, poor permeability and "blocking large and not blocking small", especially suitable for plugging large-scale dominant channels due to the low cementation strength of the reservoir rocks and long-term high-intensity injection and flushing damage;from the viewpoint of the technology and economy, the compositions of the inorganic geopolymer gel have been optimized.The research results will provide the experimental evidences for the technical decision-making of the high-capacity control.
引文
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[11]张大旺,王栋民.地质聚合物混凝土研究现状[J].材料导报,2018,32(9):430-436.ZHANG Dawang,WANG Dongmin.Research status of geopolymer concrete[J].Material Review,2018,32 (9):430-436.
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[13]孙道胜,王爱国,胡普华.地质聚合物的研究与应用发展前景[J].材料导报,2009,23(7):61-65.SUN Daosheng,WANG Aiguo,HU Puhua.Research of geopolymer and its applications and development prospects[J].Materials Review,2009,23 (7):61-65.
[14]王婷婷,卢祥国,陈阳,等.渤海油田大尺寸优势通道封堵剂性能评价[J].油气地质与采收率,2017,24(6):103-107.WANG Tingting,LU Xiangguo,CHEN Yang,et al.Performance evaluation of plugging agent for large-size prefenrential channels in Bohai Oilfield[J].Petroleum Geology and Recovery Efficiency,2017,24 (6):103-107.
[15]王婷婷,卢祥国,潘赫,等.渤海油藏高渗透层封堵剂组成优化及其影响因素实验研究[J].油气地质与采收率,2018,25(6):114-119.WANG Tingting,LU Xiangguo,PAN He,et al.Experimental study on the composition optimization of plugging agents and its influencing factors for highly permeable layers of Bohai Oilfield[J].Petroleum Geology and Recovery Efficiency,2018,25 (6):114-119.
[2]禹影.聚合物驱后油层优势渗流通道识别与治理[J].大庆石油地质与开发,2017,36(4):101-105.YU Ying.Identification and control of the preferential seepage channels for the oil reservoirs after the polymer flooding[J].Petroleum Geology & Oilfield Development in Daqing,2017,36 (4):101-105.
[3]SHENG J J,LEONHARDT B,NASSER A.Status of polymer-flooding technology[J].Journal of Canadian Petroleum Technology,2015,54 (2):116-125.
[4]STANDNES D C,SKIEVRAK I.Literature review of implemented polymer field projects[J].Journal of Petroleum Science and Engineering,2014,115 (10):761-775.
[5]柏明星,张志超,梁健巍.中高渗透砂岩油田优势流场识别与调整[J].油气地质与采收率,2017,24(1):100-105.BAI Mingxing,ZHANG Zhichao,LIANG Jianwei.Identification and adjustment of streamline field in middle-high permeability sandstone oilfield[J].Petroleum Geology and Recovery Efficiency,2017,24 (1):100-105.
[6] 王鸣川,石成方,朱维耀,等.优势渗流通道识别与精确描述[J].油气地质与采收率,2016,23(1):79-84.WANG Mingchuan,SHI Chengfang,ZHU Weiyao,et al.Identification and accurate description of preponderance flow path[J].Petroleum Geology and Recovery Efficiency,2016,23(1):79-84.
[7]NARISU,EROFEEV V I,LU Xiangguo,et al.The effect of layer water mineralization on physical chemical and filtration characteristics of polymeric solutions and gels for increasing oil recovery[J].Bulletin of the Tomsk Polytechnic University-Geo Assets Engineering,2019,330 (3):136-145.
[8]ALSOFI A M,BLUNT M J.Polymer flooding design and optimization under economic uncertainty[J].Journal of Petroleum Science and Engineering,2014,124 (12):46-59.
[9]MANZHAY V N,POLIKARPOV A V,ROZHDESTVENSKY E A.Application of oil-soluble polymers for increasing petroleum oil refining[J].Bulletin of the Tomsk Polytechnic University-Geo Assets Engineering,2017,328 (12):29-35.
[10]彭晖,陈治坤,崔潮,等.偏高岭土基地聚物合成的固化温度影响机理[J].建筑材料学报,2017,20(3):379-384.PENG Hui,CHEN Zhikun,CUI Chao,et al.Influencing mechanism of curing temperature on synthesis of metakaolin-based geopolymer[J].Journal of Building Materials,2017,20 (3):379-384.
[11]张大旺,王栋民.地质聚合物混凝土研究现状[J].材料导报,2018,32(9):430-436.ZHANG Dawang,WANG Dongmin.Research status of geopolymer concrete[J].Material Review,2018,32 (9):430-436.
[12]RAFFA P,BROEKHUIS A A,POCCHIONI F.Polymeric surfactants for enhanced oil recovery:A review[J].Journal of Petroleum Science and Engineering,2016,145 (9):723-733.
[13]孙道胜,王爱国,胡普华.地质聚合物的研究与应用发展前景[J].材料导报,2009,23(7):61-65.SUN Daosheng,WANG Aiguo,HU Puhua.Research of geopolymer and its applications and development prospects[J].Materials Review,2009,23 (7):61-65.
[14]王婷婷,卢祥国,陈阳,等.渤海油田大尺寸优势通道封堵剂性能评价[J].油气地质与采收率,2017,24(6):103-107.WANG Tingting,LU Xiangguo,CHEN Yang,et al.Performance evaluation of plugging agent for large-size prefenrential channels in Bohai Oilfield[J].Petroleum Geology and Recovery Efficiency,2017,24 (6):103-107.
[15]王婷婷,卢祥国,潘赫,等.渤海油藏高渗透层封堵剂组成优化及其影响因素实验研究[J].油气地质与采收率,2018,25(6):114-119.WANG Tingting,LU Xiangguo,PAN He,et al.Experimental study on the composition optimization of plugging agents and its influencing factors for highly permeable layers of Bohai Oilfield[J].Petroleum Geology and Recovery Efficiency,2018,25 (6):114-119.
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