互均衡技术及其在时移地震资料处理中的应用  

Cross-equilibration technique and its application in time-lapse seismic data processing.

作　　者：苏云[1] 李录明[1] 刘艳华[2] 汪炎[2] 卫彩红[2] 

机构地区：[1]成都理工大学信息工程学院,四川成都610059 [2]中国石油化工股份有限公司江汉油田分公司物探研究院,湖北潜江433100

出　　处：《石油物探》2009年第3期247-251,16,共5页Geophysical Prospecting For Petroleum

基　　金：教育部博士点基金(20070616004)资助

摘　　要：在开发程度较高的油气田,可以利用时移地震技术对油藏的开采和剩余油分布情况进行预测,提高油田的采收率。时移地震资料(监测数据)与早期地震资料(基础数据)的地球物理参数存在差异,这个差异包含油气藏开采因素(期望差异)和非油气藏因素(非期望差异),因此,需要将时移地震资料上的非期望差异消除,同时不损害期望差异。互均衡技术通过对时移地震信号的时延、能量、带宽和相位等差异进行校正,可以有效地消除非期望差异,在差异剖面上反映出油藏开采信息和剩余油分布信息。在某油田,利用采集时间相隔7年的地震资料,基于时移地震资料非一致性分析,采用互均衡技术进行了时间、振幅、相位和频率等校正,较好地消除了非期望差异,差异剖面反映出现今油藏开采的情况,同时还反映出剩余油的分布特征。In the oil-gas fields with high exploitation degree,time-lapse seismic technology can be used to predict the exploitation of oil reservoir and the distribution of remaining oil,and to enhance the oil recovery.Time-lapse seismic data(monitoring data) and the early seismic data(basic data) have differences in the geophysical parameters. The differences include reservoir exploitation factors(expected difference) and non-reservoir factors(non-expected difference). Therefore,the non-expected difference in time-lapse seismic data should be removed without damaging the expected difference. Cross-equilibration technique can effectively remove non-expected difference and reflect the reservoir exploitation information and remaining oil distribution information on difference profile.In one oilfield, the seismic data with a 7-year interval in acquisition time was utilized.After the non-uniform analysis for time-lapse seismic data, and cross-equilibration technique was used to correct time,amplitude, phase and frequency,etc.the non-expected difference was effectively removed,and the difference profile reflected the present reservoir exploitation situation as well as the distribution of remaining oil.

关 键 词：时移地震 期望差异 非期望差异 非一致性 互均衡技术 

分 类 号：P631.4[天文地球—地质矿产勘探]