局部地震属性识别火山岩体  

Volcanic rock recognition by local seismic attribution

作　　者：陈常乐[1] 刘洋[1] 刘财[1] 汪春江 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026 [2]大庆钻探物探二公司,吉林松原138000

出　　处：《世界地质》2011年第4期660-665,共6页World Geology

基　　金：国家973计划课题(2009CB219301);国家自然科学基金项目(41004041;40974054)联合资助

摘　　要：中国的火山岩储层具有很大的生油潜力,尤其在东北地区的松辽盆地,火山岩广泛发育,如何有效识别火山岩储层具有重要意义。地震属性是一种有效的储层特征分析工具,是研究火山岩空间分布的参数。频率、地震倾角和曲率等属性是利用地震数据识别火山岩的敏感特征。笔者提出利用局部地震属性方法,通过计算地震剖面的局部频率,在局部频率数据体上画出低频的区域范围,对同一剖面计算曲率,在曲率数据体上将高曲率值区域圈出,在地震剖面上将这两个区域进行叠置显示,能够自动识别出火山岩体的可能分布区域,为进一步识别火山岩储层提供指导。Volcanic rock reservoirs in China have great oil-generating potential, especially in the Songliao Ba- sin, where the volcanic rocks widely existed. Thus, how to recognize the volcanic rock reservoirs effectively is sig- nificant. The seismic attribution is an effective analysis tool of reservoir characteristics, which is the parameter to study the spatial distribution of volcanic rocks. Frequency, seismic dip and curvature are sensitive characteristics to identify the volcanic rocks by seismic data. The authors calculate the local frequency in the seismic profile to circle the area of low frequency using the method of local seismic attributes, and then calculate the curvature of the same profile to circle the area of high curvature value in curvature data volume. Overlaying the two areas in seismic pro- file can recognize the possible distribution area of volcanic rocks and provide guidance to further recognition of vol- canic reservoirs.

关 键 词：局部地震属性 局部地震倾角 曲率 火山岩 

分 类 号：P631.4[天文地球—地质矿产勘探]