【摘要】 永区位于苏北盆地东台坳陷中部,其油藏类型复杂,具有多样性。以岩石物理研究为基础,利用叠前地震反演技术对研究区的储层及烃类进行预测。通过测井曲线校正与标准化,进行有效的地层对比,最大程度反映地层岩石的真实物理特征,确保地质认识的准确性。通过对不同岩石物理弹性参数进行岩性及流体的敏感性分析,确定密度为叠前地震反演的最佳参数。采用近似Zeoppritz方程求解地震参数的方法进行叠前密度反演,结合井震对比表明,叠前密度反演结果的横向及纵向分辨率较高,能较好地预测研究区的储层展布; 受储层复杂性的制约,叠前密度反演难以完全揭示油气在储层中的分布特征,仅能预测部分烃类储层的分布。更多还原

【Abstract】 Yong block is located in the center of Dongtai depression in north Subei Basin, and its reservoir type is complex and diverse. This paper predicts reservoir and hydrocarbon in study area using pre-stack seismic inversion method which is used to guide the rock-physics analysis. With log data correction and standardization, the log curves perform the real stratigraphic rock characteristics, and then carry out the effective stratigraphic correlation to ensure the accuracy of geological understanding. With different lithology and fluid rock-physics sensibility analysis, we distinguish reservoir sands and hydrocarbon, and then identify the best parameter for pre-stack inversion. According to system analysis of elastic parameters of seismic rock physics, and aimed at the complex reservoir characteristics in study area, we combine the rock-physics analysis with pre-stack seismic inversion technology and using approximate Zeoppritz equation method to predict the reservoir sands and hydrocarbons. Finally, combined the well with seismic correction, the results indicate that: pre-stack inversion results can predict reservoir sands distribution well, because of the limit of reservoir itself complexity, hydrocarbons prediction can’t exposit its distribution characteristics completely. The next step of oil and gas exploration should enhance the study of sedimentary facies and sequence stratigraphy.更多还原