徐家围子断陷致密砂砾岩储层逆时成像效果分析

Reverse time imaging analysis for tight sandy-conglomerate objective in Xujiaweizi fault depression

徐家围子断陷致密砂砾岩目标是大庆油田重要的资源接替领域,针对该类目标区,形成了以表层Q补偿、两步法反褶积、高精度速度建模和逆时偏移为主要技术的成像流程,并在研究区进行了处理应用.对成像数据体进行了道集、剖面、构造解释和属性的对比分析,结果显示应用GeoEast-Lightning软件的逆时偏移方法完成的研究区三维地震资料的逆时偏移数据,成像效果较以往Kirchhoff积分叠前深度偏移方法有较为明显改善,研究形成的深层复杂构造GeoEast-Lightning逆时偏移的方法流程,适合研究区深层波场的特征,基本达到工业化推广的应用要求.

The target of Xujiaweizi fault depression tight sand conglomerate is an important resource of the Daqing oil field to succeed,according to the target area,the main technology of imaging process includes the surface Q compensation,two step deconvolution,high precision velocity modeling and reverse time migration has been formed,and the treatment was applied in the researched area.The imaging result were analyzed in CRP gather,profile,structural interpretation and attribute comparison,we apply reverse time migration method of the GeoEast-Lightning to complete the reverse time migration processing of the researched survey,compared with the traditional pre-stack depth migration of Kirchhoff integral method,the imaging result has been obviously improved.Formed the process of reverse time migration for deep and complex structure which processed by GeoEast-Lightning,which fits wave field characteristic of deep layer,and basically meet the requirements of industrialization promotion application.