三湖地区疏松砂岩测井资料弹性参数分析
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摘要
柴达木盆地三湖地区储层为疏松砂岩,取心收获率低,难以用于岩石物理实验室分析,测井岩石物理分析技术不受取心条件限制,且能综合反映地下岩石的真实情况,利用测井资料对三湖地区弹性参数进行了直方图和交会图分析。结果表明,体积模量、拉梅系数、纵横波速度比和泊松比对气层敏感,在含气砂岩段均表现为低值特征;应用不同敏感性空间的弹性参数进行交会分析,可以预测三湖地区的有利储层。为了更好的与地震解释相结合,建立了研究区岩石物理模板用以指导实际地震数据的定量解释。
The reservoirs of Sanhu area in Qaidam Basin are unconsolidated sandstone.It is difficult to analyze the petrophysical characteristics of unconsolidated sandstone in laboratory due to the low core recovery.Petrophysical log analysis is not restricted by the core conditions,and can reflect the actual conditions of the underground rock comprehensively.Based on log data,the elastic parameters of Sanhu area are used to make histogram analysis and cross plot analysis of different fluids and lithology.The result shows that bulk modulus,Lame coefficient,compressional velocity and shear velocity ratio and Poisson's ratio are sensitive to gas-bearing formation and these parameters are low characteristic in gas-bearing sandstone reservoirs.The favorable reservoir of Sanhu area can be predicted through the cross plots of different sensitivity parameter spaces.To better integrate with seismic interpretation,a template was constructed to provide guidance for the quantitative seismic interpretation of hydrocarbon-bearing reservoirs.
The reservoirs of Sanhu area in Qaidam Basin are unconsolidated sandstone.It is difficult to analyze the petrophysical characteristics of unconsolidated sandstone in laboratory due to the low core recovery.Petrophysical log analysis is not restricted by the core conditions,and can reflect the actual conditions of the underground rock comprehensively.Based on log data,the elastic parameters of Sanhu area are used to make histogram analysis and cross plot analysis of different fluids and lithology.The result shows that bulk modulus,Lame coefficient,compressional velocity and shear velocity ratio and Poisson's ratio are sensitive to gas-bearing formation and these parameters are low characteristic in gas-bearing sandstone reservoirs.The favorable reservoir of Sanhu area can be predicted through the cross plots of different sensitivity parameter spaces.To better integrate with seismic interpretation,a template was constructed to provide guidance for the quantitative seismic interpretation of hydrocarbon-bearing reservoirs.
引文
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[3]Dewar J.Rock physics for the rest of us:An informal dis-cussion[Z].CSEG Recorder,2001,42-49.
[4]赵群.疏松砂岩储层物性参数敏感性物理模拟实验[J].石油学报,2006,27(4):93-96.
[5]刘卫华,高建虎,陈启艳,等.测井资料岩石物理分析在苏西地区储层预测研究中的应用[J].地球物理学进展,2010,25(3):939-945.
[6]Qiao Y D,An H W.Study of petrophysical parameter sen-sitivity from well log data[J].Applied Geophysics,2007,4(4):282-287.
[7]王元君,冉建斌,肖伟.基于测井资料岩石物理模拟的储层识别法[J].石油地球物理勘探,2006,41(6):644-650.
[8]杨建礼,郝以岭,郑浚茂.东蹼凹陷W405井含气砂岩弹性参数特征分析[J].石油物探,2006,45(6):619-623
[9]张承森,关雎,宋帆.识别凝析气层的测井新方法研究[J].天然气工业,1999,19(2):54-57.
[10]陈颙,黄庭芳.岩石物理学[M].北京:北京大学出版社,2001:69-71.
[11]田立新,王玉英.弹性参数反演技术应用[A].中国地球物理.2009[C].中国科学技术大学出版社,2009.
[12]黄云峰,杨占龙,郭精义,等.地震属性分析及其在岩性油气藏勘探中的应用[J].天然气地球科学,2006,17(5):739-742.
[13]Krief M,Garta J,Stellingwerff J,et al.A petrophysical in-terpretation using the velocitiesof P and S waves(Full-wave-form sonic)[J].The Log Analyst,1990(31):355-369.
[14]Myung W L.Biot-Gassmann theory for velocities of gas-hydrate-bearing Sediments[J].Geophysics,2002(67):1711-1719.
[15]Myung W L.Velocity ratio and its application to predictingvelocities[R].U.S.Geological Survey Bulletin2197,2003.
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