江陵凹陷速度变化规律及原因探讨  

Variation rule of velocity and its cause analysis of Jiangling Depression

作　　者：易远元[1] 宋玉梅[2] 查树贵[3] 雷卫兵[3] 张水山[3] 

机构地区：[1]中国地质大学研究生院 [2]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [3]江汉油田分公司物探研究院,湖北潜江433100

出　　处：《大庆石油地质与开发》2007年第1期119-122,126,共5页Petroleum Geology & Oilfield Development in Daqing

摘　　要：地震波速度是地球物理勘探和开发中最重要的一个参数。因此,结合勘探与测井等实际资料——VSP测井、地震测井、声波测井和地震速度谱资料建立速度场,通过水平切片、沿层切片以及垂直切片的方式,重点研究了江陵凹陷的纵向、横向上的速度变化规律,并系统地分析了其横向上速度变化的原因。结果表明,地层的埋藏深度、剥蚀作用、断层发育情况、玄武岩发育情况、低降速带的厚度变化等是导致江陵凹陷速度变化的重要原因。Seismic wave velocity is the most important parameter in geophysical prospecting and development. Therefore, this paper established the velocity field in combination with prospecting and logging data, such as VSP, seismic log, acoustic log and seismic velocity spectrum. Through the study of horizontal slice, slice along layer and vertical slice, it focused on the variation rules of seismic wave velocity vertically and horizontally in Jiangling Depression, and also analyzed the cause of horizontal change of seismic wave velocity. Result shows that stratigraphic buried depth, denudation, faults development extent, basaltic intensity and variation in thickness of deceleration area are main reasons leading to velocity change in Jiangling Depression.

关 键 词：江陵凹陷 地震波速度 地震速度谱 速度变化 地震测井 声波测井 

分 类 号：P631[天文地球—地质矿产勘探]