盐湖盆地岩性油藏储层预测技术研究--以潜江凹陷张港单斜带为例

Study on reservoir prediction technology of lithologic reservoir in Salt Lake Basin

江汉盐湖盆地潜江凹陷张港单斜带岩性油藏较发育,目的层段砂、泥、盐岩性组合复杂,砂层薄,圈闭勘探程度低。总结出一套适合该工区的储层预测方法和手段:通过岩石物理参数分析,定量描述有利储层的物性特征;在此基础上应用地震正演的方法进行储层地震响应特征分析;最后在沉积微相的指导下,波阻抗、密度和伽马多属性反演结果融合,应用交会取交集的手段来识别渗透性砂岩,进而精细刻画储层的展布和物性特征,确定有利圈闭。

the lithologic reservoir of Zhan ggang monocline in Qianjiang sag of Jianghan Salt Lake Basin is relatively developed,the lithologic combination of sand,mud and salt in the target interval is complex,the sand layer is thin,and the degree of trap exploration is low.In view of the difficulties,this paper summarizes a set of reservoir prediction methods and means suitable for the work area:through the analysis of petrophysical parameters,quantitatively describe the physical characteristics of favorable reservoirs;on this basis,the seismic forward modeling method is applied to analyze the seismic response characteristics of reservoirs;finally,under the guidance of sedimentary microfacies,the inversion results of wave impedance,density and gamma multi-attribute are integrated,and the intersection is applied It can identify permeable sandstone by means of collection,and then accurately depict the distribution and physical characteristics of reservoir to determine favorable traps.