时延地震方法初探

Discussion on time-lapse seismic approaches

1. 大庆石油管理局物探公司，黑龙江大庆163357;2. 大庆油田责任有限公司，黑龙江大庆163300

1. Geophysical Prospecting Company of Daqing Petroleum Administration, Daqing 163357, China;2. Daqing Oilfield Limited Company, Daqing 163300, China

时延地震是油气藏动态监测与管理的一种新方法。它利用重复多次地震测量来监测油气藏随时间的动态变化。首先对注水地震监测的模拟方法进行了研究,讨论了地震频率和信噪比等因素对薄互层油气藏注水地震监测的影响。其次对时延地震资料归一化处理方法进行了研究,并对大庆地区实际二维时延地震资料进行了归一化处理。归一化处理后的资料表明,油气藏部分的剩余能量与油气藏的流体运动有关。

Time-lapse seismic exploration is a new method for dynamic monitoring and management of reservoirs. It monitors changes of reservoirs with time by means of multiple seismic surveys. The paper discusses issues of time-lapse seismic exploration. Firstly, simulation methods for injection seismic monitoring are discussed with the emphasis on impacts of seismic frequencies and S/N on injection seismic monitoring of thin-interbedded reservoirs. Secondly, studies into normalization for processing on time-lapse seismic data are conducted. Finally, 2-D time-lapse seismic data from Daqing area is processed and analyzed. The results show that the residual energy in hydrocarbon reservoirs is related to fluid migration in the reservoirs.