【摘要】 M区深水油田发育深水浊积砂岩,该储层具有岩石物理特征复杂及横向变化快的特点,利用常规技术手段难以准确预测储层的含油气性。本文首先利用岩石物理分析、AVO模型和井震响应分析进行了可行性研究,应用叠前AVA同时反演技术求取纵波阻抗、横波阻抗、纵横波速度比等弹性参数;然后利用属性转换技术求取泊松阻抗和烃类指示属性等转换参数,对目标储层做进一步研究。研究结果表明,利用泊松阻抗能很好地区分砂、泥岩,烃类指示属性可预测砂岩的含油气性。最终利用泊松阻抗和烃类指示属性数据体提取的属性平面图,能预测储层的岩性和含油气性分布规律,为探井部署提供可靠依据。更多还原

【Abstract】 Well-developed deep-sea turbidity sandstone reservoirs in Block M,a deep-sea oil field,are characterized by complex laterally varying petro-physics.It is very difficult to accurately predict oil & gas reservoirs with conventional approaches.In order to meet this challenge,we firstly conduct feasibility study by rock physics analysis,AVO modeling and well-seismic response analysis and then we calculate elastic parameters,such as compressional wave impedance,shear wave impedance,and VP/VS ratio,with pre-stack AVA simultaneous inversion.Finally,we obtain Poisson’s impedance and hydrocarbon indication attributes by attribute transform,and predict target reservoir.The study results show that shale and sandstone can be discriminated by Poisson’s impedance,and oil & gas sandstone can be predicted by hydrocarbon indication.With attribute plane graphs extracted from Poisson’s impedance and hydrocarbon indication attribute data volume,we predict reservoir lithology and its distribution for future exploration well deployment.更多还原