基于叠前偏移的观测系统优化设计及应用效果  

Geometry optimization design and application effect based on the prestack migration

作　　者：姚江[1] 徐雷良[2] 

机构地区：[1]中国石油化工股份有限公司石油工程管理部,北京100728 [2]中国石油化工集团公司胜利石油管理局地球物理勘探开发公司,山东东营257100

出　　处：《石油物探》2011年第6期589-594,528,共6页Geophysical Prospecting For Petroleum

摘　　要：叠前偏移对观测系统有着较强的依赖性,属性好的观测系统可以有效提高叠前偏移成像效果。但目前高精度地震勘探中基于叠前偏移成像效果的观测系统设计以及论证方法较少。为此,介绍了基于叠前偏移成像效果的观测系统设计方法,即通过分析观测系统道距、炮点距、接收线距、炮线距、最大跑检距选择对叠前偏移成像效果的影响,利用双聚焦、叠前偏移响应、采集痕迹分析等技术,合理选择观测系统参数。应用该方法在胜利探区史南(SN)工区取得了良好的采集效果。Prestack migration strongly relies on the geometry,and the geometry with good attributes can effectively improve the result of prestack migration.However,at present,there are few geometry design and demonstration methods based on the pre-stack migration imaging effect in the high-precision seismic exploration.Therefore,we introduced the geometry design method from the requirements of pre-stack migration imaging.Firstly,we analyzed the impact of the selection of geometry parameters(such as trace distance,shot point distance,receiving line distance,shot line distance and maximum offset) on pre-stack migration.Then,double focusing,pre-stack migration response and foot print analysis technology were utilized to reasonably select geometry parameters.The application of the method acquired good result in the Shinan block of Shengli exploration area.

关 键 词：观测系统 双聚焦 叠前偏移 采集痕迹 点散射 

分 类 号：P631.4[天文地球—地质矿产勘探]