基于叠前地震反演参数的流体饱和度定量预测方法
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摘要
提出了一种基于测井数据和叠前地震反演参数的流体饱和度定量预测方法——孔隙体积模量法。该方法基于Gassmann方程,在假设已经对岩性进行了可靠的定性预测,并较准确地计算了砂岩的泥质含量和孔隙度的前提下,利用测井资料计算干燥岩石体积模量和孔隙体积模量,利用各种叠前反演得到的弹性参数拟合干燥岩石体积模量,建立含水饱和度与孔隙体积模量的关系式,对流体饱和度进行定量估算。利用长庆油田苏里格地区的实际地震资料对孔隙体积模量法进行了验证,结果表明,该方法能定量预测含气饱和度,且能半定量预测气层的产能。根据预测结果部署的井位经钻探获得了高产气流。
A new method based on well logging data and pre-stack seismic inversion parameters,which is called pore bulk modulus method, is presented to quantitatively calculate pore fluid saturation. This method is based on Gassmann equation.It is assumed that the lithology is predicted credibly and the shale content and porosity are calculated accurately as well.Then the dry rock bulk modulus and pore space modulus are calculated from well logging data.Finally, the relation equation between water saturation and pore bulk modulus is constructed by using multiple-regression scheme fitting dry rock modulus from elastic parameters obtained from various pre-stack inversion methods,to quantitatively calculate fluid saturation. Actual seismic data from SLG region of Changaing oil field is used to verify the method.The result shows that this method can be used to quantitatively predict gas saturation and to semiquantitatively predict flow potential.High gas rate wells are successfully drilled in terms of the prediction results.
A new method based on well logging data and pre-stack seismic inversion parameters,which is called pore bulk modulus method, is presented to quantitatively calculate pore fluid saturation. This method is based on Gassmann equation.It is assumed that the lithology is predicted credibly and the shale content and porosity are calculated accurately as well.Then the dry rock bulk modulus and pore space modulus are calculated from well logging data.Finally, the relation equation between water saturation and pore bulk modulus is constructed by using multiple-regression scheme fitting dry rock modulus from elastic parameters obtained from various pre-stack inversion methods,to quantitatively calculate fluid saturation. Actual seismic data from SLG region of Changaing oil field is used to verify the method.The result shows that this method can be used to quantitatively predict gas saturation and to semiquantitatively predict flow potential.High gas rate wells are successfully drilled in terms of the prediction results.
引文
1Kassouri A,Djaffer J.Lithology and gas detection by AVO crossplot polarization and intercept inversion[J]. Expanded Abstract of EAGE 65~(th) Annual Conference, 2003,P039
2Peters S W,Lichman E,Wilson P H,et al.Direct gas detection using wavelet energy absorption[J].Expanded Abstract of EAGE 65~(th) Annual Conference,2003,E32
3Li H B,Zhao W Z,Cao H,et al.Measures of scale based on the wavelet scalogram and its applications to gas detection[J].Expanded Abstract of 75~(th) Annual Internat SEG Mtg,2005,1405-1408
4甘利灯,赵邦六,杜文辉,等.弹性阻抗在岩性与流体预测中的潜力分析[J].石油物探,2005,44(5):504-508
5李宗杰,王胜泉.地震属性参数在塔河油田储层含油气性预测中的应用[J].石油物探,2004,43(5):453- 457
6李显贵,徐天吉,甘其刚.新场气田须家河气藏含气性地震检测研究[J].石油物探,2006,45(2):186-191
7李爱山,印兴耀,张繁昌,等.叠前AVA多参数同步反演技术在含气储层预测中的应用[J].石油物探,2007, 46(1):64-68
8高建虎,雍学善,刘洪.叠后地震油气检测技术与应用[J].石油物探,2006,45(4);385-389
9张娥.利用地震属性预测砂岩储集层厚度及含油饱和度[J].石油勘探与开发,2000,27(1):92-94
10李来林.一种预测储层含油饱和度的新方法[J].大庆石油地质与开发,2002,21(3):72-73
11刘洋.利用地震资料估算孔隙度和饱和度的一种新方法[J].石油学报,2005,6(2):61-64
12金龙.利用地震资料定量反演孔隙度和饱和度的新方法[J].石油学报,2006,27(4):63-66
13 Gassmann M.Elasticity of porous media:uber die elastizitat poroser medien[J].Viertel Jarsschrift der Naturforschenden Gesselschaft,1951,96:1-23
14 White J E.Computed seismic speeds attenuation in rocks with partial gas saturation[J].Geophysics,1975, 40(2):224-232
15 Russell B H,Hedlin K,Hilterman F J.Fluid-property discrimination with AVO:a Biot-Gassmann perspective [J].Geophysics,2003,68(1):29-39
2Peters S W,Lichman E,Wilson P H,et al.Direct gas detection using wavelet energy absorption[J].Expanded Abstract of EAGE 65~(th) Annual Conference,2003,E32
3Li H B,Zhao W Z,Cao H,et al.Measures of scale based on the wavelet scalogram and its applications to gas detection[J].Expanded Abstract of 75~(th) Annual Internat SEG Mtg,2005,1405-1408
4甘利灯,赵邦六,杜文辉,等.弹性阻抗在岩性与流体预测中的潜力分析[J].石油物探,2005,44(5):504-508
5李宗杰,王胜泉.地震属性参数在塔河油田储层含油气性预测中的应用[J].石油物探,2004,43(5):453- 457
6李显贵,徐天吉,甘其刚.新场气田须家河气藏含气性地震检测研究[J].石油物探,2006,45(2):186-191
7李爱山,印兴耀,张繁昌,等.叠前AVA多参数同步反演技术在含气储层预测中的应用[J].石油物探,2007, 46(1):64-68
8高建虎,雍学善,刘洪.叠后地震油气检测技术与应用[J].石油物探,2006,45(4);385-389
9张娥.利用地震属性预测砂岩储集层厚度及含油饱和度[J].石油勘探与开发,2000,27(1):92-94
10李来林.一种预测储层含油饱和度的新方法[J].大庆石油地质与开发,2002,21(3):72-73
11刘洋.利用地震资料估算孔隙度和饱和度的一种新方法[J].石油学报,2005,6(2):61-64
12金龙.利用地震资料定量反演孔隙度和饱和度的新方法[J].石油学报,2006,27(4):63-66
13 Gassmann M.Elasticity of porous media:uber die elastizitat poroser medien[J].Viertel Jarsschrift der Naturforschenden Gesselschaft,1951,96:1-23
14 White J E.Computed seismic speeds attenuation in rocks with partial gas saturation[J].Geophysics,1975, 40(2):224-232
15 Russell B H,Hedlin K,Hilterman F J.Fluid-property discrimination with AVO:a Biot-Gassmann perspective [J].Geophysics,2003,68(1):29-39
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