基于断层约束反演的薄互层储盖组合研究

Research on Reservoir and Cap Combination of Thin Interbed Based on Fault Constrained Inversion

金山气田下白垩统陆相碎屑岩储层厚度薄、横向变化快,储层和盖层的空间展布是制约勘探开发的关键问题。此文以龙山三维高分辨率地震资料为基础,以沙河子组一段为主要研究层段,通过岩石物理分析、曲线平滑滤波、断层约束建模以及叠后随机反演预测有利储层及其盖层的展布,结合构造、断裂落实有利的构造-岩性圈闭,取得了良好的应用效果。

The key problems of exploration and development are the thin reservoir thickness,rapid lateral variation and spatial distribution of reservoir and cap rock,in the lower Cretaceous continental clastic rock of Jinshan gas field.Based on the three-dimensional high-resolution seismic data of Longshan and the first member of Shahezi Formation as the main research stratum,this paper predicts the distribution of favorable reservoirs and cap rock by petrophysical analysis,curve smoothing filtering,fault constraint modeling and post-stack stochastic inversion,which combines with the structure and fracture to implement the favorable structural-lithologic traps.It has achieved good application results.