基于灰色关联的压裂液渗吸主控因素分析
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摘要
渗吸作用是影响致密储层开发效果的重要因素,明晰压裂液渗吸机理及影响因素作用规律对于评价致密储层压后生产特征意义重大。基于新疆致密砂岩储层岩心,采用体积法开展了饱和油致密岩心压裂液渗吸实验,研究了压裂液体系、岩心渗透率、实验温度、岩心长度和原油黏度对渗吸速率及渗吸采收率的影响,并基于灰色关联度对渗吸因素进行了影响程度评价。研究表明:渗吸采收率与渗透率、实验温度正相关,与压裂液质量分数、岩心长度和原油黏度负相关,渗吸速率初始较快,随后迅速下降;各渗吸因素对渗吸采收率的影响程度排序为压裂液体系>原油黏度>实验温度>岩心长度>岩心渗透率,致密储层压裂后应对储层性质及注入流体性质进行综合评价,为压后生产特征分析提供依据。
Imbibition is a key factor which decides the effect of tight formation development,and clarifying the hydraulic fracturing fluids imbibition mechanism and influencing factors have a great significance to the production characteristics after hydraulic fracturing. Volume method was adopted to conduct hydraulic fracturing fluids imbibition experiments with oil-saturated cores,and then effect and influencing degree of hydraulic fracturing fluids,core permeability,experiment temperature,core length and oil viscosity on imbibition recovery and rate had been studied. The results show that recovery changes positively with permeability and experiment temperature,and it changes negatively with hydraulic fracturing fluids,core length and oil viscosity. Imbibition rate presents a fast increase at beginning,and then drops quickly at the followings. The influencing sequencing of factors is: hydraulic fracturing fluids > oil viscosity > experiment temperature > core length > core permeability. Comprehensive evaluation should be conducted after hydraulic fracturing to give support to the development.
Imbibition is a key factor which decides the effect of tight formation development,and clarifying the hydraulic fracturing fluids imbibition mechanism and influencing factors have a great significance to the production characteristics after hydraulic fracturing. Volume method was adopted to conduct hydraulic fracturing fluids imbibition experiments with oil-saturated cores,and then effect and influencing degree of hydraulic fracturing fluids,core permeability,experiment temperature,core length and oil viscosity on imbibition recovery and rate had been studied. The results show that recovery changes positively with permeability and experiment temperature,and it changes negatively with hydraulic fracturing fluids,core length and oil viscosity. Imbibition rate presents a fast increase at beginning,and then drops quickly at the followings. The influencing sequencing of factors is: hydraulic fracturing fluids > oil viscosity > experiment temperature > core length > core permeability. Comprehensive evaluation should be conducted after hydraulic fracturing to give support to the development.
引文
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13刘思峰,蔡华,杨英杰,等.灰色关联分析模型研究进展[J].系统工程理论与实践,2013,33(8):2041-2046.Liu Sifeng,Cai Hua,Yang Yingjie,et al.Advance in grey incidence analysis modelling[J].Systems Engineering-Theory and Practice,2013,33(8):2041-2046.
2邹才能,陶士振,杨智,等.中国非常规油气勘探与研究新进展[J].矿物岩石地球化学通报,2012,31(4):312-322Zou Caineng,Tao Shizhen,Yang Zhi,et al.New advance in unconventional petroleum exploration and research in China[J].Bulletin of Mineralogy Petrology and Geochemistry,2012,31(4):312-322
3董大忠,王玉满,李新景,等.中国页岩气勘探开发新突破及发展前景思考[J].天然气工业,2016,36(1):19-32Dong Dazhong,Wang Yuman,Li Xinjing,et al.Breakthough and prospect of shale gas exploration and development in China[J].Natural Gas Industry,2016,36(1):19-32
4国家能源局.致密砂岩气地质评价方法:SY/T 6832-2011[S].北京:石油工业出版社,2011.National Energy Administration.Geological evaluating methods for tight sandstone gas:SY/T 6832-2011[S].Beijing:Petroleum Industry Press,2011
5唐颖,唐玄,王广源,等.页岩气开发水力压裂技术综述[J].地质通报,2011,30(增刊1):393-399Tang Ying,Tang Xuan,Wang Guangyuan,et al.Summary of hydraulic fracturing technology in shale gas development[J].Geological Bulletin of China,2011,30(S1):393-399.
6王永辉,卢拥军,李永平,等.非常规储层压裂改造技术进展及应用[J].石油学报,2012,33(增刊1):149-158Wang Yonghui,Lu Yongjun,Li Yongping,et al.Progress and application of hydraulic fracturing technology in unconventional reservoir[J].Acta Petrolei Sinica,2012,33(S1):149-158
7王敬,刘慧卿,夏静,等.裂缝性油藏渗吸采油机理数值模拟[J].石油勘探与开发,2017,44(5):761-770Wang Jing,Liu Huiqing,Xia Jing,et al.Mechanism simulation of oil displacement by imbibition in fractured reservoirs[J].Petroleum Exploration and Development,2017,44(5):761-770
8周万富,王鑫,卢祥国,等.致密油储层动态渗吸采油效果及其影响因素[J].大庆石油地质与开发,2017,36(3):148-155Zhou Wanfu,Wang Xin,Lu Xiangguo,et al.Effects of the dynamic imbibition recovery and its influencing factors for the tight oil reserviors[J].Petroleum Geology and Oilfield Development in Daqing,2017,36(3):148-155
9张星,毕义泉,汪庐山,等.低渗透砂岩油藏渗吸采油技术[J].辽宁工程技术大学学报(自然科学版),2009,28(增刊1):153-155Zhang Xing,Bi Yiquan,Wang Lushan,et al.Study on imbibition production of low permeability sand reservoir[J].Journal of Liaoning Technical University(Natural Science),2009,28(S1):153-155
10濮御,王秀宇,濮玲.静态渗吸对致密油开采效果的影响及其应用[J].石油化工高等学校学报,2016,29(3):23-27Pu Yu,Wang Xiuyu,Pu Ling.Effect of spontaneous imbibition on tight reservoirs[J].Journal of Petrochemical Universities,2016,29(3):23-27
11李士奎,刘卫东,张海琴,等.低渗透油藏自发渗吸驱油实验研究[J].石油学报,2007,28(2):109-112Li Shikui,Liu Weidong,Zhang Haiqin,et al.Experimental study of spontaneous imbibition in low-permeability reservoir[J].Acta Petrolei Sinica,2007,28(2):109-112
12周凤军,陈文明.低渗透岩心渗吸实验研究[J].复杂油气藏,2009,29(1):54-56Zhou Fengjun,Chen Wenming.Study on spontaneous imbibition experiment of low permeability core[J].Complex Hydrocarbon Reservoirs,2009,29(1):54-56
13刘思峰,蔡华,杨英杰,等.灰色关联分析模型研究进展[J].系统工程理论与实践,2013,33(8):2041-2046.Liu Sifeng,Cai Hua,Yang Yingjie,et al.Advance in grey incidence analysis modelling[J].Systems Engineering-Theory and Practice,2013,33(8):2041-2046.