银根盆地查干凹陷火山沉积岩岩相特征及其识别标志  

Volcanic Sedimentation Petrography facies, Identification and Oil-gas Bearing,Chagan Depression, Yin’gen Basin

作　　者：杨占龙[1] 郭精义[1] 陈启林[1] 宋广寿[2] 黄刚[2] 

机构地区：[1]中国地质大学(北京) [2]长庆油田公司勘探开发研究院,西安710021

出　　处：《沉积学报》2005年第1期67-72,共6页Acta Sedimentologica Sinica

摘　　要：对银根盆地查干凹陷火山沉积岩岩相及其在地震剖面上的识别标志进行研究,探讨火山沉积作用与油气藏的关系,指出了与火山沉积作用有关油气藏的有利勘探区带。该区火成岩岩相类型有爆发相、溢流相、火山颈相及火山沉积相,尤以溢流岩的沉积作用最为发育;依据火山岩类通常以地震波速较高、密度大、磁化率高、电阻率大和地震波吸收能量大的特征,建立了几种火山沉积岩的地震识别标志。深大断裂控制着火成岩及与其相关的沉积作用的分布,同时控制着油气圈闭的分布。Based on volcanic sedimentation petrography facies and their identification on seismic, the relationship between volcanic petrography sedimentation facies and oil-gas reservoirs has been discussed, then proposed the prospective areas. In Yin'gen basin the types of volcanic sedimentation petrography facies include explosionfacies, outflow facies, volcanic-neck facies and volcanicsedimentary facies, especially the outflow facies. According to the geophysical characteristics of volcanic sedimentation petrography facies(high seismic velocity, high density, high susceptibility, high resistance and high absorption coefficient to seismic wave), four volcanic sedimentation petrography facies and four intruded petrography facies are established. Deep-faults control the distribution of igneous rocks and igneous traps. The prospectivezones of igneous reservoir are near fault belts.

关 键 词：火山 沉积作用 沉积岩 识别标志 岩相 查干凹陷 银根盆地 油气藏 区带 地震识别 

分 类 号：P618[天文地球—矿床学] P588[天文地球—地质学]