电缆地层测试资料在低渗气藏产能预测中的应用
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摘要
电缆地层测试是目前海上油气藏储层渗流特征及产能评估的有利方法,但对于低渗气藏,测压流度受近井带钻井液滤液影响较大,不能真实反映原状地层渗流能力。以南海莺琼盆地为研究区,选取10口典型低渗气井电缆地层测试资料进行分析与处理,结合冲洗带渗流特征,基于区域岩心相渗实验驱替规律,建立了低渗气藏测压流度与绝对渗透率转换方法;利用岩心相渗资料产水率计算方法,提出了一种测压流度与有效渗透率转换方法,并结合区域产能测试资料建立了产能快速评价模型。实际应用表明,利用测压流度处理得到的动、静态渗透率与岩心及试井分析结果差异小,且产能预测结果与实际测试结果符合较好,平均相对误差为10%,本文方法可在类似气田进行推广应用。
Cable formation test is a good method for seepage characteristics and productivity assessment of offshore reservoirs.However,as for low permeability gas reservoirs,the pressure measurement mobility is largely affected by the drilling fluid filtrate nearby the wellbore,and in-situ seepage capacity can't be truly reflected.By taking the Yinggehai-Qiongdongnan basin in South China Sea as the study area,and conducting analysis and processing on the cable formation test data of 10 typical low-permeability gas wells,the conversion method of pressure measurement mobility and absolute permeability for low permeability gas reservoirs was established based on the flooding laws in regional core phase permeability experiment and in combination with the seepage characteristics of flushing zone.By using the core phase permeability data-based water rate calculation method,a conversion method of pressure measurement mobility and effective permeability was proposed,and a rapid productivity evaluation model was established based on the regional productivity test data.The field application shows that the difference between the dynamic/static permeability obtained by pressure measurement mobility processing and that of core and well testing analysis is insignificant,and the result of productivity prediction is in good agreement with the measured one,with an average relative error of only 10%.The method proposed in this paper will have a good application prospect in similar gas fields.
Cable formation test is a good method for seepage characteristics and productivity assessment of offshore reservoirs.However,as for low permeability gas reservoirs,the pressure measurement mobility is largely affected by the drilling fluid filtrate nearby the wellbore,and in-situ seepage capacity can't be truly reflected.By taking the Yinggehai-Qiongdongnan basin in South China Sea as the study area,and conducting analysis and processing on the cable formation test data of 10 typical low-permeability gas wells,the conversion method of pressure measurement mobility and absolute permeability for low permeability gas reservoirs was established based on the flooding laws in regional core phase permeability experiment and in combination with the seepage characteristics of flushing zone.By using the core phase permeability data-based water rate calculation method,a conversion method of pressure measurement mobility and effective permeability was proposed,and a rapid productivity evaluation model was established based on the regional productivity test data.The field application shows that the difference between the dynamic/static permeability obtained by pressure measurement mobility processing and that of core and well testing analysis is insignificant,and the result of productivity prediction is in good agreement with the measured one,with an average relative error of only 10%.The method proposed in this paper will have a good application prospect in similar gas fields.
引文
[1]马建国.油气井地层测试[M].北京:石油工业出版社,2006.
[2] JAEDONG L,JOHN M.Enhance wireline formation tests in low-permeability formations:quality control through formation rate analysis[C].Rocky Mountain Regional/Low-Permeability Reservoirs Symposium and Exhibition,2000.
[3] MARK A P,WILSON C C.Advanced permeability and anisotropy measurements while testing and sampling in real-time using a dual probe formation tester[C].Annual Technical Conference and Exhibition.Dallas,USA,2000.
[4] HURST S M,MCCOY T F,HOWS M P.Using the casedhole formation tester tool for pressure transient analysis[C].Annual Technical Conference and Exhibition.Dallas,USA,2000.
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[8]周艳敏,陶果,李新玉.电缆地层测试技术应用进展[J].科技导报,2008,26(15):89-92.ZHOU Yanmin,TAO Guo,LI Xinyu.Progress in wireline formation test[J].Science&Technology Review,2008,26(15):89-92.
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[11]鹿克峰,简洁,朱文娟,等.利用MDT压降流度求取低渗气藏气相渗透率的方法[J].中国海上油气,2015,27(6):53-56.DOI:10.11935/j.issn.1673-1506.2015.06.009.LU Kefeng,JIAN Jie,ZHU Wenjuan,et al.Calculating gas phase permeability with drawdown fluiditytested by mdt for low gas reservoir[J].China Offshore Oil and Gas,2015,27(6):53-56.DOI:10.11935/j.issn.1673-1506.2015.06.009.
[12]邸德家,陶果,叶青.电缆地层测试在低渗储层应用方法的研究[J].地球物理学进展,2012,27(6):2518-2525.DI Dejia,TAO Guo,YE Qing.Application of cable formation testing in low permeability reservoirs[J].Progress in Geophysics,2012,27(6):2518-2525.
[13]易敏,郭平,孙良田.非稳态法水驱气相对渗透率曲线实验[J].天然气工业,2007,27(10):92-94.YI Min,GUO Ping,SUN Liangtian.Experimental study on unsteady state gas/water relative permeability curve[J].Natural Gas Industry,2007,27(10):92-94.
[14]董平川,马志武,赵常生.储层相对渗透率评价方法[J].大庆石油地质与开发,2008,27(6):55-58.DONG Pingchuan,MA Zhiwu,ZHAO Changsheng.Evaluating method of relative permeabilities of a reservoir[J].Petroleum Geology&Oilfield Development in Daqing,2008,27(6):55-58.
[15] DUSSAN E B V.A robust method for calculating formation mobility with a formation tester[J].SPE Reservoir Evaluation&Engineering,2011,14(2):239-247.
[16]高旺来.绝对渗透率对相对渗透率及其应用的影响[J].特种油气藏,2016,23(3):126-128.GAO Wanglai.The effects of absolute permeability on relative permeability and its application[J].Special Oil&Gas Reservoirs,2016,23(3):126-128.
[17]洪世铎.油藏物理基础[M].北京:石油工业出版社,1985:115-116.
[18]王智,许江文,谷斌.基于测井资料的低孔低渗储层产能预测研究[J].西南石油大学学报(自然科学版),2009,31(6):51-55.WANG Zhi,XU Jiangwen,GU Bin.Low porosity and low permeability rerservoir deliverability based on welllogging data[J].Journal of Southwest Petroleum University(Science&Technology Edition),2009,31(6):51-55.
[19] LIU C B,SCHWAB K,LIN X J,et al.Layer productivity prediction based on wireline logsand formation tester data[R].SPE 64655,2000.
[2] JAEDONG L,JOHN M.Enhance wireline formation tests in low-permeability formations:quality control through formation rate analysis[C].Rocky Mountain Regional/Low-Permeability Reservoirs Symposium and Exhibition,2000.
[3] MARK A P,WILSON C C.Advanced permeability and anisotropy measurements while testing and sampling in real-time using a dual probe formation tester[C].Annual Technical Conference and Exhibition.Dallas,USA,2000.
[4] HURST S M,MCCOY T F,HOWS M P.Using the casedhole formation tester tool for pressure transient analysis[C].Annual Technical Conference and Exhibition.Dallas,USA,2000.
[5]林梁.电缆地层测试器资料解释理论与地质应用[M].1版.北京:石油工业出版社,1994.
[6]匡立春.电缆地层测试资料应用导论[M].1版.北京:石油工业出版社,2005.
[7]罗宁,张健,刘胜军.模块式地层动态测试器(MDT)在四川的应用[J].西南石油学院学报,2002,24(5):19-20.LUO Ning,ZHANG Jian,LIU Shengjun.The application of MDT in Sichuan[J].Journal of Southwest Petroleum Institute,2002,24(5):19-20.
[8]周艳敏,陶果,李新玉.电缆地层测试技术应用进展[J].科技导报,2008,26(15):89-92.ZHOU Yanmin,TAO Guo,LI Xinyu.Progress in wireline formation test[J].Science&Technology Review,2008,26(15):89-92.
[9]李安琪,谭中国,译.SPE天然气开发新进展(2000)[M].北京:石油工业出版社,2004.
[10] BENNION D B,THOMAS F B,BIETZ R F.Low permeability gas reservoirs:problems opportunities and solutions for drilling,completion,stimulation and production[R].SPE35577,1996.
[11]鹿克峰,简洁,朱文娟,等.利用MDT压降流度求取低渗气藏气相渗透率的方法[J].中国海上油气,2015,27(6):53-56.DOI:10.11935/j.issn.1673-1506.2015.06.009.LU Kefeng,JIAN Jie,ZHU Wenjuan,et al.Calculating gas phase permeability with drawdown fluiditytested by mdt for low gas reservoir[J].China Offshore Oil and Gas,2015,27(6):53-56.DOI:10.11935/j.issn.1673-1506.2015.06.009.
[12]邸德家,陶果,叶青.电缆地层测试在低渗储层应用方法的研究[J].地球物理学进展,2012,27(6):2518-2525.DI Dejia,TAO Guo,YE Qing.Application of cable formation testing in low permeability reservoirs[J].Progress in Geophysics,2012,27(6):2518-2525.
[13]易敏,郭平,孙良田.非稳态法水驱气相对渗透率曲线实验[J].天然气工业,2007,27(10):92-94.YI Min,GUO Ping,SUN Liangtian.Experimental study on unsteady state gas/water relative permeability curve[J].Natural Gas Industry,2007,27(10):92-94.
[14]董平川,马志武,赵常生.储层相对渗透率评价方法[J].大庆石油地质与开发,2008,27(6):55-58.DONG Pingchuan,MA Zhiwu,ZHAO Changsheng.Evaluating method of relative permeabilities of a reservoir[J].Petroleum Geology&Oilfield Development in Daqing,2008,27(6):55-58.
[15] DUSSAN E B V.A robust method for calculating formation mobility with a formation tester[J].SPE Reservoir Evaluation&Engineering,2011,14(2):239-247.
[16]高旺来.绝对渗透率对相对渗透率及其应用的影响[J].特种油气藏,2016,23(3):126-128.GAO Wanglai.The effects of absolute permeability on relative permeability and its application[J].Special Oil&Gas Reservoirs,2016,23(3):126-128.
[17]洪世铎.油藏物理基础[M].北京:石油工业出版社,1985:115-116.
[18]王智,许江文,谷斌.基于测井资料的低孔低渗储层产能预测研究[J].西南石油大学学报(自然科学版),2009,31(6):51-55.WANG Zhi,XU Jiangwen,GU Bin.Low porosity and low permeability rerservoir deliverability based on welllogging data[J].Journal of Southwest Petroleum University(Science&Technology Edition),2009,31(6):51-55.
[19] LIU C B,SCHWAB K,LIN X J,et al.Layer productivity prediction based on wireline logsand formation tester data[R].SPE 64655,2000.