降低页岩油气瞬态流分析多解性的控制方法
|
摘要
瞬态流分析(RTA)方法是一种通过生产数据快速评价页岩油气藏储层渗透率、压裂裂缝半长、SRV体积、可采储量和EUR等参数的分析方法。在对页岩油气田实际数据的分析时,由于动态数据的不规则、理论不完善等原因,使瞬态流分析结果具有较大的不确定性,这会造成对井的生产状态判断产生错误,从而对开发策略的制定造成误导。针对瞬态流分析过程中容易出现多解、错解的问题,从优化解释方法和完善解释理论进行研究,提出了线性流分析-解析模型拟合约束求解方法和复合线性流解释方法,以提高解释结果的可靠性。这2种方法在实际区块典型井的分析中应用效果良好,解释渗透率与测试渗透率基本一致,部分生产井压裂裂缝半长小于设计井距,并可根据分析结果在局部进行井网加密调整。
Rate transient analysis(RTA)is a type of theoretical analysis method to quickly evaluate the parameters of shale oil-gas reservoirs including the permeability,hydraulic fracture half-length,SRV volume,recoverable reserves and EUR based on production data.When analyzing the actual data of a certain overseas shale oil-gas field,due to the irregular dynamic data and imperfect theory,agreat uncertainty exists in RTA results.This will cause errors in the judgment of well production state,thus misleading the formulation of development strategies.Aiming at the problems of multiple solutions and false solutions easily appearing in the process of RTA,a research was conducted in terms of optimizing interpretation method and perfecting analysis theory in this study,and two methods were proposed,i.e.,the constrained solution method including linear flow analysis and analytical model fitting and compound linear flow interpretation method,which can improve the reliability of interpretation results.Moreover,the two methods showed good application effect in analyzing the typical wells of a certain shale oil-gas block,of which the interpretation permeability was basically consistent with test permeability.On this basis,it was found that the hydraulic fracture half-length of some producing wells was less than the designed well spacing,so that well pattern infilling could be locally adjusted according to analysis results.
Rate transient analysis(RTA)is a type of theoretical analysis method to quickly evaluate the parameters of shale oil-gas reservoirs including the permeability,hydraulic fracture half-length,SRV volume,recoverable reserves and EUR based on production data.When analyzing the actual data of a certain overseas shale oil-gas field,due to the irregular dynamic data and imperfect theory,agreat uncertainty exists in RTA results.This will cause errors in the judgment of well production state,thus misleading the formulation of development strategies.Aiming at the problems of multiple solutions and false solutions easily appearing in the process of RTA,a research was conducted in terms of optimizing interpretation method and perfecting analysis theory in this study,and two methods were proposed,i.e.,the constrained solution method including linear flow analysis and analytical model fitting and compound linear flow interpretation method,which can improve the reliability of interpretation results.Moreover,the two methods showed good application effect in analyzing the typical wells of a certain shale oil-gas block,of which the interpretation permeability was basically consistent with test permeability.On this basis,it was found that the hydraulic fracture half-length of some producing wells was less than the designed well spacing,so that well pattern infilling could be locally adjusted according to analysis results.
引文
[1]纪文明,宋岩,姜振学,等.四川盆地东南部龙马溪组页岩微-纳米孔隙结构特征及控制因素[J].石油学报,2016,37(2):182-195.JI Wenming,SONG Yan,JIANG Zhenxue,et al.Micro-nano pore structure characteristics and its control factors of shale in Longmaxi Formation,southeastern Sichuan Basin[J].Acta Petrolei Sinica,2016,37(2):182-195.
[2]李武广,钟兵,杨洪志,等.页岩储层基质气体扩散能力评价新方法[J].石油学报,2016,37(1):88-96.LI Wuguang,ZHONG Bing,YANG Hongzhi,et al.A new method for gas diffusivity evaluation in matrix rocks of shale reservoir[J].Acta Petrolei Sinica,2016,37(1):88-96.
[3]张岩,刘金城,徐浩,等.陆相与过渡相煤系页岩孔隙结构及分形特征对比——以鄂尔多斯盆地东北缘延安组与太原组为例[J].石油学报,2017,38(9):1036-1046.ZHANG Yan,LIU Jincheng,XU Hao,et al.Comparison between pore structure and fractal characteristics of continental and transitional coal measures shale:a case study of Yan'an and Taiyuan formations at the northeastern margin of Ordos Basin[J].Acta Petrolei Sinica,2017,38(9):1036-1046.
[4]SAMANDARLI O,MCDONALD B,BARZOLA G,et al.Understanding shale performance:performance analysis workflow with analytical models in eagle ford shale play[R].SPE169004,2014.
[5]AL-OTAIBI B A,SCHECHTER D S,WATTENBARGER R A.Production forecast,analysis and simulation of eagle ford shale oil wells[R].SPE172929,2015.
[6]王川杰,袁续祖,高威,等.威远气田页岩气井产量递减分析方法研究[J].天然气勘探与开发,2014,37(1):56-59.WANG Chuanjie,YUAN Xuzu,GAO Wei,et al.Methods to analyze production decline of shale-gas wells in Weiyuan gasfield[J].Natural Gas Exploration&Development,2014,37(1):56-59.
[7]赵威,丁文龙,尹帅,等.物质平衡及线性流原理下的煤层气储层生产数据分析[J].辽宁工程技术大学学报:自然科学版,2016,35(1):16-20.ZHAO Wei,DING Wenlong,YIN Shuai,et al.Production data analysis of coalbed methane reservoir based on principle of material balance and linear theory[J].Journal of Liaoning Technical University:Natural Science,2016,35(1):16-20.
[8]FETKOVICH M J.Decline curve analysis using type curves[J].Journal of Petroleum Technology,1980,32(6):1065-1077.
[9]BLASINGAME T A,JOHNSTON J L,LEE W J.Type-curve analysis using the pressure integral method[R].SPE18799,1989.
[10]BLASINGAME T A,MCCRAY T L,LEE W J.Decline curve analysis for variable pressure drop/variable flowrate systems[R].SPE21513,1991.
[11]AGARWAL R G,GARDNER D C,KLEINSTEIBER S W,et al.Analyzing well production data using combined type curve and decline curve analysis concepts[R].SPE49222,1998.
[12]MATTAR L,ANDERSON D M.A systematic and comprehensive methodology for advanced analysis of production data[J].SPE84472,2003.
[13]MATTAR L,MCNEIL R.The"Flowing"gas material balance[J].Journal of Canadian Petroleum Technology,1998,37(2):52-55.
[14]MITTERMEIR G M.Material-balance method for dual-porosity reservoirs with recovery curves to model the matrix/fracture transfer[J].SPE Reservoir Evaluation&Engineering,2015,18(2):171-186.
[15]魏明强,段永刚,方全堂,等.基于物质平衡修正的页岩气藏压裂水平井产量递减分析方法[J].石油学报,2016,37(4):508-515.WEI Mingqiang,DUAN Yonggang,FANG Quantang,et al.Production decline analysis method of fractured horizontal well in shale gas reservoirs based on modifying material balance[J].Acta Petrolei Sinica,2016,37(4):508-515.
[16]OROZCO D,AGUILERA R.A material balance equation for stresssensitive shale gas condensate reservoirs[R].SPE177260,2015.
[17]NOBAKHT M,CLARKSON C R.A new analytical method for analyzing linear flow in tight/shale gas reservoirs:constant-flowing-pressure boundary condition[J].SPE Reservoir Evaluation&Engineering,2012,15(3):370-384.
[18]NOBAKHT M,CLARKSON C R.A new analytical method for analyzing linear flow in tight/shale gas reservoirs:constant-rate boundary condition[J].SPE Reservoir Evaluation&Engineering,2012,15(1):51-59.
[19]NOBAKHT M,MATTAR L.Analyzing production data from unconventional gas reservoirs with linear flow and apparent skin[J].Journal of Canadian Petroleum Technology,2012,51(1):52-59.
[20]WATTENBARGER R A,EL-BANBI A H,VILLEGAS M E,et al.Production analysis of linear flow into fractured tight gas wells[R].SPE39931,1998.
[21]BROWN M,OZKAN E,RAGHAVAN R,et al.Practical solutions for pressure-transient responses of fractured horizontal wells in unconventional shale reservoirs[R].SPE125043,2009.
[22]OZKAN E,BROWN M L,RAGHAVAN R S,et al.Comparison of fractured horizontal-well performance in conventional and unconventional reservoirs[R].SPE121290,2009.
[23]STALGOROVA E,MATTAR L.Analytical model for history matching and forecasting production in multifrac composite systems[R].SPE162516,2012.
[24]STALGOROVA E,MATTAR L.Practical analytical model to simulate production of horizontal wells with branch fractures[R].SPE162515,2012.
[25]ACUNA J A.Application of linear flow volume to rate transient analysis[R].SPE173330,2015.
[26]LIANG P,THOMPSON J M,MATTAR L.Importance of the transition period to compound linear flow in unconventional reservoirs[R].SPE162646,2012.
[27]LIU S,VALKP P.Optimization of spacing and penetration ratio for infinite-conductivity fractures in unconventional reservoirs:a section-based approach[R].SPE186107,2017.
[28]CENTURION S,JUNCA-LAPLACE J P,CADE R,et al.Lessons learned from an eagle ford shale completion evaluation[R].SPE170827,2014.
[29]LALEHROKH F,BOUMA J.Well spacing optimization in eagle ford[R].SPE171640,2014.
[30]NEUHAUS C W,ZEYNA A R.Completions evaluation in the eagle ford shale[R].URTeC1921549,2014.
[31]PATEL H,JOHANNING J,FRY M.Borehole microseismic,completion and production data analysis to determine future wellbore placement,spacing and vertical connectivity,Eagle Ford Shale,South Texas[R].URTeC1609109,2013.
[2]李武广,钟兵,杨洪志,等.页岩储层基质气体扩散能力评价新方法[J].石油学报,2016,37(1):88-96.LI Wuguang,ZHONG Bing,YANG Hongzhi,et al.A new method for gas diffusivity evaluation in matrix rocks of shale reservoir[J].Acta Petrolei Sinica,2016,37(1):88-96.
[3]张岩,刘金城,徐浩,等.陆相与过渡相煤系页岩孔隙结构及分形特征对比——以鄂尔多斯盆地东北缘延安组与太原组为例[J].石油学报,2017,38(9):1036-1046.ZHANG Yan,LIU Jincheng,XU Hao,et al.Comparison between pore structure and fractal characteristics of continental and transitional coal measures shale:a case study of Yan'an and Taiyuan formations at the northeastern margin of Ordos Basin[J].Acta Petrolei Sinica,2017,38(9):1036-1046.
[4]SAMANDARLI O,MCDONALD B,BARZOLA G,et al.Understanding shale performance:performance analysis workflow with analytical models in eagle ford shale play[R].SPE169004,2014.
[5]AL-OTAIBI B A,SCHECHTER D S,WATTENBARGER R A.Production forecast,analysis and simulation of eagle ford shale oil wells[R].SPE172929,2015.
[6]王川杰,袁续祖,高威,等.威远气田页岩气井产量递减分析方法研究[J].天然气勘探与开发,2014,37(1):56-59.WANG Chuanjie,YUAN Xuzu,GAO Wei,et al.Methods to analyze production decline of shale-gas wells in Weiyuan gasfield[J].Natural Gas Exploration&Development,2014,37(1):56-59.
[7]赵威,丁文龙,尹帅,等.物质平衡及线性流原理下的煤层气储层生产数据分析[J].辽宁工程技术大学学报:自然科学版,2016,35(1):16-20.ZHAO Wei,DING Wenlong,YIN Shuai,et al.Production data analysis of coalbed methane reservoir based on principle of material balance and linear theory[J].Journal of Liaoning Technical University:Natural Science,2016,35(1):16-20.
[8]FETKOVICH M J.Decline curve analysis using type curves[J].Journal of Petroleum Technology,1980,32(6):1065-1077.
[9]BLASINGAME T A,JOHNSTON J L,LEE W J.Type-curve analysis using the pressure integral method[R].SPE18799,1989.
[10]BLASINGAME T A,MCCRAY T L,LEE W J.Decline curve analysis for variable pressure drop/variable flowrate systems[R].SPE21513,1991.
[11]AGARWAL R G,GARDNER D C,KLEINSTEIBER S W,et al.Analyzing well production data using combined type curve and decline curve analysis concepts[R].SPE49222,1998.
[12]MATTAR L,ANDERSON D M.A systematic and comprehensive methodology for advanced analysis of production data[J].SPE84472,2003.
[13]MATTAR L,MCNEIL R.The"Flowing"gas material balance[J].Journal of Canadian Petroleum Technology,1998,37(2):52-55.
[14]MITTERMEIR G M.Material-balance method for dual-porosity reservoirs with recovery curves to model the matrix/fracture transfer[J].SPE Reservoir Evaluation&Engineering,2015,18(2):171-186.
[15]魏明强,段永刚,方全堂,等.基于物质平衡修正的页岩气藏压裂水平井产量递减分析方法[J].石油学报,2016,37(4):508-515.WEI Mingqiang,DUAN Yonggang,FANG Quantang,et al.Production decline analysis method of fractured horizontal well in shale gas reservoirs based on modifying material balance[J].Acta Petrolei Sinica,2016,37(4):508-515.
[16]OROZCO D,AGUILERA R.A material balance equation for stresssensitive shale gas condensate reservoirs[R].SPE177260,2015.
[17]NOBAKHT M,CLARKSON C R.A new analytical method for analyzing linear flow in tight/shale gas reservoirs:constant-flowing-pressure boundary condition[J].SPE Reservoir Evaluation&Engineering,2012,15(3):370-384.
[18]NOBAKHT M,CLARKSON C R.A new analytical method for analyzing linear flow in tight/shale gas reservoirs:constant-rate boundary condition[J].SPE Reservoir Evaluation&Engineering,2012,15(1):51-59.
[19]NOBAKHT M,MATTAR L.Analyzing production data from unconventional gas reservoirs with linear flow and apparent skin[J].Journal of Canadian Petroleum Technology,2012,51(1):52-59.
[20]WATTENBARGER R A,EL-BANBI A H,VILLEGAS M E,et al.Production analysis of linear flow into fractured tight gas wells[R].SPE39931,1998.
[21]BROWN M,OZKAN E,RAGHAVAN R,et al.Practical solutions for pressure-transient responses of fractured horizontal wells in unconventional shale reservoirs[R].SPE125043,2009.
[22]OZKAN E,BROWN M L,RAGHAVAN R S,et al.Comparison of fractured horizontal-well performance in conventional and unconventional reservoirs[R].SPE121290,2009.
[23]STALGOROVA E,MATTAR L.Analytical model for history matching and forecasting production in multifrac composite systems[R].SPE162516,2012.
[24]STALGOROVA E,MATTAR L.Practical analytical model to simulate production of horizontal wells with branch fractures[R].SPE162515,2012.
[25]ACUNA J A.Application of linear flow volume to rate transient analysis[R].SPE173330,2015.
[26]LIANG P,THOMPSON J M,MATTAR L.Importance of the transition period to compound linear flow in unconventional reservoirs[R].SPE162646,2012.
[27]LIU S,VALKP P.Optimization of spacing and penetration ratio for infinite-conductivity fractures in unconventional reservoirs:a section-based approach[R].SPE186107,2017.
[28]CENTURION S,JUNCA-LAPLACE J P,CADE R,et al.Lessons learned from an eagle ford shale completion evaluation[R].SPE170827,2014.
[29]LALEHROKH F,BOUMA J.Well spacing optimization in eagle ford[R].SPE171640,2014.
[30]NEUHAUS C W,ZEYNA A R.Completions evaluation in the eagle ford shale[R].URTeC1921549,2014.
[31]PATEL H,JOHANNING J,FRY M.Borehole microseismic,completion and production data analysis to determine future wellbore placement,spacing and vertical connectivity,Eagle Ford Shale,South Texas[R].URTeC1609109,2013.