基于密度分析的含气饱和度预测研究应用
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摘要
Z区块多口井均有气层发现,且单井钻遇的气层多,总气层厚度大,在地震剖面上能看到同相轴变粗、下拉、低频等含气特征。该区形成"亮点"的原因很多,不同饱和度的气层和含气水层均为强振幅反射,研究认为Z区含气性识别的难点不在于区分气层与水层,而是含气饱和度的定量预测。在叠前反演和岩石物理分析的基础上,应用敏感参数扰动实验,识别了反映饱和度变化的敏感参数,取得敏感参数随饱和度变化的关系,并利用该关系对海外已含油气盆地进行了应用效果的验证。
Many gas wells were discovered in Z blocks,and the number of gas layer is larger in single well and the total gas is thick.In the seismic profile,the gas-bearing event features in higher thickness,dropping down and low frequency.There are many reasons for òbright spotó in this area,and the gas and gas-water layer of different saturation is strong in amplitude.Studies suggest that it is not difficult to identify the distinction between the water and gas,but the quantitative prediction of gas saturation.In this paper,based on pre-stack inversion and rock physics analysis,perturbation experiments were conducted to identify the sensitive parameter for saturation and obtained the sensitive parameter and the relationship between the density and saturation.Finally the relationship was used to examine the application effect in overseas oil and gas basins.
Many gas wells were discovered in Z blocks,and the number of gas layer is larger in single well and the total gas is thick.In the seismic profile,the gas-bearing event features in higher thickness,dropping down and low frequency.There are many reasons for òbright spotó in this area,and the gas and gas-water layer of different saturation is strong in amplitude.Studies suggest that it is not difficult to identify the distinction between the water and gas,but the quantitative prediction of gas saturation.In this paper,based on pre-stack inversion and rock physics analysis,perturbation experiments were conducted to identify the sensitive parameter for saturation and obtained the sensitive parameter and the relationship between the density and saturation.Finally the relationship was used to examine the application effect in overseas oil and gas basins.
引文
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[4]张中平,刘建红.四川盆地阆中—广安地区低孔渗储层含气性预测实例[J].中国石油勘探,2011,16(5-6):119～124.
[5]邓继新,等.基于统计岩石物理的含气储层饱和度与孔隙度联合反演[J].石油天然气学报,2009,31(1):48～54.
[6]尹成,等.地震相约束的多属性储层预测方法研究[J].西南石油大学学报,2010,32(5):173～179.
[7]李凌高,等.基于叠前地震反演参数的流体饱和度定量预测方法[J].石油物探,2009,48(2):121～125.
[2]牛聪,张益明,廖静.崖城26区目标储层预测与油气检测技术[J].中国石油勘探,2010,15(6):59～63.
[3]高严,朱怡翔,宋本彪.储层含油饱和度评价新方法及其应用[J].中国石油勘探,2011,16(2):35～38.
[4]张中平,刘建红.四川盆地阆中—广安地区低孔渗储层含气性预测实例[J].中国石油勘探,2011,16(5-6):119～124.
[5]邓继新,等.基于统计岩石物理的含气储层饱和度与孔隙度联合反演[J].石油天然气学报,2009,31(1):48～54.
[6]尹成,等.地震相约束的多属性储层预测方法研究[J].西南石油大学学报,2010,32(5):173～179.
[7]李凌高,等.基于叠前地震反演参数的流体饱和度定量预测方法[J].石油物探,2009,48(2):121～125.
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