地震正演模型在西湖油气田中的应用

Application of Seismic Forward Modeling in Xihu Oil and Gas Field

唐金炎 刘舒

TANG Jinyan LIU Shu

中国石油化工股份有限公司上海海洋油气分公司勘探开发研究院, 上海 200120

Institute of Exploration and Development, SINOPEC Shanghai Offshore Oil and Gas Company, Shanghai 200120, China

地震正演的射线追踪法是将地震波波动理论简化为射线理论，它属于几何地震学方法，其方法运算方便，适用性强。西湖M油气田主力储层H3砂层组内部砂体横向变化快，砂体薄，从钻后的结果分析A井与B井之间H3层内部砂体存在不连通的可能性，为了明确砂体间的变化关系建立了多个地质模型，并运用射线追踪法进行正演模拟，通过正演后的地震剖面和真实的地震剖面对比可知H3a， H3b， H3c砂体在A和B井之间连通的可能性比较小， H3d砂体的连通可能性大。

The Ray tracing method in the seismic forward modeling is to simplify the seismic wave theory into the ray theory,which belongs to a geometry seismology method, with the characteristics of convenient operation and good applicability. The main reservoir H3 sand interval in M oil and gas field is thin and rapidly changes in lateral. The post-drilling analysis showed that the interior sand bodies of H3 interval were possibly not connected between Well A and Well B. In order to confirm the complex geological structure between the wells, the authors built serval geological models,and conducted the seismic forward modelling through ray tracing method.The comparison of seismic profiles from the forward modeling and the real reveals that the connectivity of sand H3a, H3b, H3c of interval is poor among the wells, but H3d is possibly connective.

https://doi.org/10.3969/j.issn.1008-2336.2017.03.007