联合应用两种弹性参数组合进行含油性识别——涠西南凹陷涠三段油层识别实践
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摘要
通过对涠西南凹陷某区块涠三段测井岩石物理参数的综合分析,总结出了该区的岩石物理特征,获得了反映该区岩性与含油性的敏感参数,并得到如下认识:联合应用纵横波速度比(或泊松比)与拉梅常数(或拉梅常数与密度之积、拉梅常数与密度之比、体积模量)两种弹性参数组合,或者采用纵横波阻抗联合反演交会的方式,可以较好地预测该区有利目标的含油性。在测井分析的基础上,结合叠前地震资料完成弹性阻抗反演,预测了B井区岩性及含油性。B井钻后测井解释结果与预测结果相符,证实了该方法在涠西南凹陷涠三段油层识别中有一定的应用前景。
Through comprehensively analyzing the Member 3 logging petrophysical parameters of Weizhou Formation in a block of Weixi'nan depression,the petrophysical features are summarized,and the sensitive parameters to reflect lithology and oil potential are obtained. Furthermore,it is concluded that the oil potential of favorable targets can be better predicted by a combined application of two elasticity parameters,i.e. the velocity ratio of P and S waves (or Poisson's ratio) and Lame's constant (or Lame's constant×density,Lame's constant/density,bulk modulus),or by using an impedance joint-inversion intersection of P and S waves. Based on a logging analysis and in combination with the pre-stack seismic data,the elastic impedance inversion is completed,and the lithology and oil potential are predicted in Well B area. The logging interpretation of drilled Well B is consistent with the prediction,confirming that this method will be quite applicable in identification of Member 3 oil layers in Weizhou Formation,Weixinan depression.
Through comprehensively analyzing the Member 3 logging petrophysical parameters of Weizhou Formation in a block of Weixi'nan depression,the petrophysical features are summarized,and the sensitive parameters to reflect lithology and oil potential are obtained. Furthermore,it is concluded that the oil potential of favorable targets can be better predicted by a combined application of two elasticity parameters,i.e. the velocity ratio of P and S waves (or Poisson's ratio) and Lame's constant (or Lame's constant×density,Lame's constant/density,bulk modulus),or by using an impedance joint-inversion intersection of P and S waves. Based on a logging analysis and in combination with the pre-stack seismic data,the elastic impedance inversion is completed,and the lithology and oil potential are predicted in Well B area. The logging interpretation of drilled Well B is consistent with the prediction,confirming that this method will be quite applicable in identification of Member 3 oil layers in Weizhou Formation,Weixinan depression.
引文
1)刘明全,等.北部湾盆地勘探潜力分析及勘探部署建议.2004.
1)伍向阳,等.东方1-1气田岩石物理参数测试及地震响应研究.2008.
[1]樊长江,王贤.泊松比岩性预测方法研究[J].石油勘探与开发,2006,33(3):299-302.
1)伍向阳,等.东方1-1气田岩石物理参数测试及地震响应研究.2008.
[1]樊长江,王贤.泊松比岩性预测方法研究[J].石油勘探与开发,2006,33(3):299-302.
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