致密油储集层水平井重复压裂时机优化——以松辽盆地白垩系青山口组为例
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摘要
以松辽盆地致密油储集层试验区为研究对象,提出了新的理想重复压裂井概念,结合体积压裂水平井特有参数对候选井的重复压裂潜力进行等级划分和排序,利用数值模拟方法建立考虑应力敏感效应的重复压裂产能预测模型,确定最优重复压裂方式和时机。研究表明,在相同的改造簇数下,对产能贡献由大到小的重复压裂方式分别是缝间补压新缝、缝内暂堵转向、老缝加长和重压老缝;重复压裂时机越晚,有效作用期越短。利用考虑地层压力变化的破裂压力预测模型研究了不同生产时间水平井段不同位置破裂压力的变化规律。通过对水平井段不同位置处破裂压力分级,可以确定最优重复压裂时机下的暂堵转向次数和暂堵剂用量。现场应用中单井日产油量由2.3 t提高到16.5 t,研究成果对同类油藏重复压裂优化设计具有借鉴意义。
Tight oil reservoirs in Songliao Basin were taken as subjects and a novel idealized refracturing well concept was proposed by considering the special parameters of volume fracturing horizontal wells, the refracturing potential of candidate wells were graded and prioritized, and a production prediction model of refracturing considering the stress sensitivity was established using numerical simulation method to sort out the optimal refracturing method and timing. The simulations show that: with the same perforation clusters, the order of fracturing technologies with contribution to productivity from big to small is refracturing between existent fractured sections, orientation diversion inside fractures, extended refracturing, refracturing of existent fractures; and the later the refracturing timing, the shorter the effective time. Based on this, the prediction model of breakdown pressure considering the variation of pore pressure was used to find out the variation pattern of breakdown pressure of different positions at different production time. Through the classification of the breakdown pressure, the times of temporary plugging and diverting and the amount of temporary plugging agent were determined under the optimal refracturing timing. Daily oil production per well increased from 2.3 t/d to 16.5 t/d in the field test. The research results provide important reference for refracturing optimization design of similar tight oil reservoirs.
Tight oil reservoirs in Songliao Basin were taken as subjects and a novel idealized refracturing well concept was proposed by considering the special parameters of volume fracturing horizontal wells, the refracturing potential of candidate wells were graded and prioritized, and a production prediction model of refracturing considering the stress sensitivity was established using numerical simulation method to sort out the optimal refracturing method and timing. The simulations show that: with the same perforation clusters, the order of fracturing technologies with contribution to productivity from big to small is refracturing between existent fractured sections, orientation diversion inside fractures, extended refracturing, refracturing of existent fractures; and the later the refracturing timing, the shorter the effective time. Based on this, the prediction model of breakdown pressure considering the variation of pore pressure was used to find out the variation pattern of breakdown pressure of different positions at different production time. Through the classification of the breakdown pressure, the times of temporary plugging and diverting and the amount of temporary plugging agent were determined under the optimal refracturing timing. Daily oil production per well increased from 2.3 t/d to 16.5 t/d in the field test. The research results provide important reference for refracturing optimization design of similar tight oil reservoirs.
引文
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[7]郭建春,李杨,王世彬.滑溜水在页岩储集层的吸附伤害及控制措施[J].石油勘探与开发,2018,45(2):320-325.GUO Jianchun,LI Yang,WANG Shibin.Adsorption damage and control measures of slick-water fracturing fluid in shale reservoirs[J].Petroleum Exploration and Development,2018,45(2):320-325.
[8]GUO J,WANG J,LIU Y,et al.Analytical analysis of fracture conductivity for sparse distribution of proppant packs[J].Journal of Geophysics and Engineering,2017,14(3):599-610.
[9]TAN Y,PAN Z,LIU J,et al.Laboratory study of proppant on shale fracture permeability and compressibility[J].Fuel,2018,222:83-97.
[10]CAO H,LI X,LU Y,et al.A fractal analysis of fracture conductivity considering the effects of closure stress[J].Journal of Natural Gas Science and Engineering,2016,32:549-555.
[11]FENG Q,XIA T,WANG S,et al.Pressure transient behavior of horizontal well with time-dependent fracture conductivity in tight oil reservoirs[J].Geofluids,2017,2017(12):1-19.
[12]SHAH M,SHAH S,SIRCAR A.A comprehensive overview on recent developments in refracturing technique for shale gas reservoirs[J].Journal of Natural Gas Science&Engineering,2017,46:350-364.
[13]BHATTACHARYA S,NIKOLAOU M.Comprehensive optimization methodology for stimulation design of low-permeability unconventional gas reservoirs[R].SPE 147622,2016.
[14]JACOBS T.Renewing mature shale wells through refracturing[J].Journal of Petroleum Technology,2014,66(4):52-60.
[15]房平亮,冉启全,刘立峰,等.致密储集层低产井重复压裂方式及裂缝参数优化[J].科学与技术工程,2017,17(24):32-37.FANG Pingliang,RAN Qiquan,LIU Lifeng,et al.Re-fracturing mode and fracture parameter optimization for stripper well in tight oil reservoir[J].Science Technology and Engineering,2017,17(24):32-37.
[16]GRIESER B,CALVIN J,DULIN J,et al.Lessons learned:Refracs from 1980 to present[R].SPE 179152,2016.
[17]VINCENT M.Restimulation of unconventional reservoirs:When are refracs beneficial?[J].Journal of Canadian Petroleum Technology,2011,50(5):36-52.
[18]ZENG F,CHENG X,GUO J,et al.Hybridising human judgment,AHP,grey theory,and fuzzy expert systems for candidate well selection in fractured reservoirs[J].Energier,2017,10:447.
[19]SHAH M,SHAN S.A comprehensive overview on recent developments in refracturing technique for shale gas reservoirs[J].Journal of Natural Gas Science and Engineering,2017,46:350-364.
[20]WANG Y,SALEHI S.Refracture candidate selection using hybrid simulation with neural network and data analysis techniques[J].Journal of Petroleum Science and Engineering,2014,123:138-146.
[21]BARREE R D,MISKIMINS J L,SVATEK K J,et al.Reservoir and completion considerations for the refracturing of horizontal wells[R].SPE 184837,2017.
[22]UDEGBE E,MORGAN E,SRINIVASAN S.From face detection to fractured reservoir characterization:Big data analytics for restimulation candidate selection[R].SPE 187328,2017.
[23]MELCHER J,PERSAC S,WHITSETT A.Restimulation design considerations and case studies of haynesville shale[R].SPE 174819,2015.
[24]SHAHRI M P,HUANG J,SMITH C S,et al.Recent advancement in temporary diversion technology for improved stimulation performance[R].SPE 182883,2016.
[25]ZHANG F,MACK M.Integrating fully coupled geomechanical modeling with microsesmicity for the analysis of refracturing treatment[J].Journal of Natural Gas Science and Engineering,2017,46:16-25.
[26]LINDSAY G J,WHITE D J,MILLER G A,et al.Understanding the applicability and economic viability of refracturing horizontal wells in unconventional plays[R].SPE 179113,2016.
[27]ASALKHUZINA G F,DAVLETBAEV A Y,FEDOROV A I.Identification of refracturing reorientation using decline-analysis and geomechranical simulator[R].SPE 187750,2017.
[28]GUO J,LU Q,CHEN H,et al.Quantitative phase field modeling of hydraulic fracture branching in heterogeneous formation under anisotropic in-situ stress[J].Journal of Natural Gas Science and Engineering,2018,56:455-471.
[29]ZHU H,DENG J,JIN X,et al.Hydraulic fracture initiation and propagation from wellbore with oriented perforation[J].Rock Mechanics and Rock Engineering,2015,48(2):585-601.
[30]HOSSAIN M M,RAHMAN M K,RAHMAN S S.Hydraulic fracture initiation and propagation:Roles of wellbore trajectory,perforation and stress regimes[J].Journal of Petroleum Science and Engineering,2000,27(3):129-149.
[31]FALLAHZADEH S H,RASOULI V,SARMADIVALEH M.An investigation of hydraulic fracturing initiation and near-wellbore propagation from perforated boreholes in tight formations[J].Rock Mechanics and Rock Engineering,2015,48(2):573-584.
[2]刘占国,朱超,李森明,等.柴达木盆地西部地区致密油地质特征及勘探领域[J].石油勘探与开发,2017,44(2):196-204.LIU Zhanguo,ZHU Chao,LI Senming,et al.Geological features and exploration fields of tight oil in the Cenozoic of western Qaidam Basin,NW China[J].Petroleum Exploration and Development,2017,44(2):196-204.
[3]卢双舫,黄文彪,李文浩,等.松辽盆地南部致密油源岩下限与分级评价标准[J].石油勘探与开发,2017,44(3):473-480.LU Shuangfang,HUANG Wenbiao,LI Wenhao,et al.Lower limits and grading evaluation criteria of tight oil source rocks of southern Songliao Basin,NE China[J].Petroleum Exploration and Development,2017,44(3):473-480.
[4]杜金虎,刘合,马德胜,等.试论中国陆相致密油有效开发技术[J].石油勘探与开发,2014,41(2):198-205.DU Jinhu,LIU He,MA Desheng,et al.Discussion on effective development techniques for continental tight oil in China[J].Petroleum Exploration and Development,2014,41(2):198-205.
[5]马旭,郝瑞芬,来轩昂,等.苏里格气田致密砂岩气藏水平井体积压裂矿场试验[J].石油勘探与开发,2014,41(6):742-747.MA Xu,HAO Ruifen,LAI Xuan’ang,et al.Field test of volume fracturing for horizontal wells in Sulige tight sandstone gas reservoirs[J].Petroleum Exploration and Development,2014,41(6):742-747.
[6]才博,赵贤正,沈华,等.束鹿凹陷致密油复合体积压裂技术[J].石油学报,2015,36(1):76-82.CAI Bo,ZHAO Xianzheng,SHEN Hua,et al.Hybird stimulated reservoir volume technology for tight oil in Shulu sag[J].Acta Petrolei Sinica,2015,36(1):76-82.
[7]郭建春,李杨,王世彬.滑溜水在页岩储集层的吸附伤害及控制措施[J].石油勘探与开发,2018,45(2):320-325.GUO Jianchun,LI Yang,WANG Shibin.Adsorption damage and control measures of slick-water fracturing fluid in shale reservoirs[J].Petroleum Exploration and Development,2018,45(2):320-325.
[8]GUO J,WANG J,LIU Y,et al.Analytical analysis of fracture conductivity for sparse distribution of proppant packs[J].Journal of Geophysics and Engineering,2017,14(3):599-610.
[9]TAN Y,PAN Z,LIU J,et al.Laboratory study of proppant on shale fracture permeability and compressibility[J].Fuel,2018,222:83-97.
[10]CAO H,LI X,LU Y,et al.A fractal analysis of fracture conductivity considering the effects of closure stress[J].Journal of Natural Gas Science and Engineering,2016,32:549-555.
[11]FENG Q,XIA T,WANG S,et al.Pressure transient behavior of horizontal well with time-dependent fracture conductivity in tight oil reservoirs[J].Geofluids,2017,2017(12):1-19.
[12]SHAH M,SHAH S,SIRCAR A.A comprehensive overview on recent developments in refracturing technique for shale gas reservoirs[J].Journal of Natural Gas Science&Engineering,2017,46:350-364.
[13]BHATTACHARYA S,NIKOLAOU M.Comprehensive optimization methodology for stimulation design of low-permeability unconventional gas reservoirs[R].SPE 147622,2016.
[14]JACOBS T.Renewing mature shale wells through refracturing[J].Journal of Petroleum Technology,2014,66(4):52-60.
[15]房平亮,冉启全,刘立峰,等.致密储集层低产井重复压裂方式及裂缝参数优化[J].科学与技术工程,2017,17(24):32-37.FANG Pingliang,RAN Qiquan,LIU Lifeng,et al.Re-fracturing mode and fracture parameter optimization for stripper well in tight oil reservoir[J].Science Technology and Engineering,2017,17(24):32-37.
[16]GRIESER B,CALVIN J,DULIN J,et al.Lessons learned:Refracs from 1980 to present[R].SPE 179152,2016.
[17]VINCENT M.Restimulation of unconventional reservoirs:When are refracs beneficial?[J].Journal of Canadian Petroleum Technology,2011,50(5):36-52.
[18]ZENG F,CHENG X,GUO J,et al.Hybridising human judgment,AHP,grey theory,and fuzzy expert systems for candidate well selection in fractured reservoirs[J].Energier,2017,10:447.
[19]SHAH M,SHAN S.A comprehensive overview on recent developments in refracturing technique for shale gas reservoirs[J].Journal of Natural Gas Science and Engineering,2017,46:350-364.
[20]WANG Y,SALEHI S.Refracture candidate selection using hybrid simulation with neural network and data analysis techniques[J].Journal of Petroleum Science and Engineering,2014,123:138-146.
[21]BARREE R D,MISKIMINS J L,SVATEK K J,et al.Reservoir and completion considerations for the refracturing of horizontal wells[R].SPE 184837,2017.
[22]UDEGBE E,MORGAN E,SRINIVASAN S.From face detection to fractured reservoir characterization:Big data analytics for restimulation candidate selection[R].SPE 187328,2017.
[23]MELCHER J,PERSAC S,WHITSETT A.Restimulation design considerations and case studies of haynesville shale[R].SPE 174819,2015.
[24]SHAHRI M P,HUANG J,SMITH C S,et al.Recent advancement in temporary diversion technology for improved stimulation performance[R].SPE 182883,2016.
[25]ZHANG F,MACK M.Integrating fully coupled geomechanical modeling with microsesmicity for the analysis of refracturing treatment[J].Journal of Natural Gas Science and Engineering,2017,46:16-25.
[26]LINDSAY G J,WHITE D J,MILLER G A,et al.Understanding the applicability and economic viability of refracturing horizontal wells in unconventional plays[R].SPE 179113,2016.
[27]ASALKHUZINA G F,DAVLETBAEV A Y,FEDOROV A I.Identification of refracturing reorientation using decline-analysis and geomechranical simulator[R].SPE 187750,2017.
[28]GUO J,LU Q,CHEN H,et al.Quantitative phase field modeling of hydraulic fracture branching in heterogeneous formation under anisotropic in-situ stress[J].Journal of Natural Gas Science and Engineering,2018,56:455-471.
[29]ZHU H,DENG J,JIN X,et al.Hydraulic fracture initiation and propagation from wellbore with oriented perforation[J].Rock Mechanics and Rock Engineering,2015,48(2):585-601.
[30]HOSSAIN M M,RAHMAN M K,RAHMAN S S.Hydraulic fracture initiation and propagation:Roles of wellbore trajectory,perforation and stress regimes[J].Journal of Petroleum Science and Engineering,2000,27(3):129-149.
[31]FALLAHZADEH S H,RASOULI V,SARMADIVALEH M.An investigation of hydraulic fracturing initiation and near-wellbore propagation from perforated boreholes in tight formations[J].Rock Mechanics and Rock Engineering,2015,48(2):573-584.
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