摘要
两期海上拖缆地震数据采集时海况等因素的不同,会导致时移地震数据中激发点、接收点和拖缆羽角的差异。特别是在拖缆地震方位角较窄和海上钻井平台位置变化时,这些差异会严重影响时移地震的可重复性。在实施南海M油田时移地震项目过程中,对于前期较差地震观测数据(缆数少、激发航线复杂、拖缆羽角大),二期时移地震采集应采用更多的缆数、较密和较直的激发航线、较小拖缆羽角进行观测;时移地震数据处理中,在满足激发点误差与接收点误差之和不超过100m的条件下,通过时移地震数据重构、相对保持拼接处理和适当的互均衡处理可获得高于99%可重复的时移地震数据,能满足储层沉积解释和剩余油气预测的要求。
Environment(obstacles,weather,tide and etc.)differences often cause differences of source and receiver positions and feathering angles in offshore streamer time lapse seismic.Especially narrow azimuth survey and platform positions shifted in an area will result in non-repeatable features of time lapse seismic.For towed streamer time lapse seismic project in the oilfield M in South China Sea,the baseline is a 4-streamer survey with complicated sail line and big feathering angle.For the monitor survey,10 streamers with dense and straight sail line(100mseparation instead of 200 m for baseline)and smaller feathering angle are adopted.In the data processing stage when source and receiver position difference between baseline and monitor surveys is less than 100 m,the trace pairs with the minimum positioning error is reconstructed from redundant monitor seismic data.And relative amplitude preserved processing of the two vintage data as well as the cross-equalization finally produce the 4Dseismic result with 99% repeatability,which satisfy the requirement of reservoir study and remaining oil predication.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2016年第1期1-12,17,共12页
Oil Geophysical Prospecting
基金
国家重大专项项目(2011ZX05019)资助
关键词
时移地震
海上拖缆
可重复性羽角
地震数据重构
相对保持拼接
互均衡
time lapse seismic
offshore streamer
repeatability
feathering angle
seismic data recon-struction
relative preserved amplitude processing
cross-equalization
作者简介
吴意明工程师，1971年生；1995年本科毕业于长春地质学院勘肖地球物理专业；毕业后入职中国海洋石油南海东部公司从事海上地震数据采集及处理；1999年加入美国康菲石油中国有限公司从事地球物理资料解释、二维地质建模及油田开发生产管理；2010年进入中海油深圳分公司从事海上油气田整体开发方案的具体实施及开发管理。
河北省涿州市中国石油东方地球物理公司油藏地球物理研究中心，072751。Email：guoxy@bgp．com．cn
