火山岩的地震波场特征及其岩相的识别方法  

IDENTIFYING METHOD OF THE SEISMIC WAVE FIELD CHARACTERISTICS AND THEIR LITHOFACIESES FOR THE VOLCANIC ROCKS

作　　者：李希元[1] 景田 吴昊 

机构地区：[1]东北石油大学地球科学学院,黑龙江大庆163318 [2]中国石油吉林油田分公司松原采气厂,吉林松原138000 [3]中国石油吉林油田分公司地球物理勘探研究院,吉林松原138000

出　　处：《大庆石油地质与开发》2016年第2期121-126,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家重点基础研究发展计划"973"项目"火山岩油气藏形成机制与分布规律"(2009CB219300)

摘　　要：随着松辽盆地深层火山岩气藏勘探的逐步深入,发现很多火山岩相均为深层天然气储层。为了准确认识火山机构各岩相的地震响应特征,对火山机构进行了随机介质建模,采用二维波动方程模拟的方法正演了火山岩相的地震波场特征。模拟结果表明:火山爆发相表现为高频杂乱的地震相特征,火山溢流相表现为低频弱连续的地震相特征;趋势相位能够较好地反映火山岩相波场的频率特征,利用趋势相位圈定火山岩相的实际应用效果较好。With the further exploration of the deep volcanic gas reservoirs in Songliao Basin,so many volcanic rocks have been discovered to be the reservoirs of deep natural gas. In order to get correct recognition of the seismic response characteristics of each lithofacies in the volcanic institutions,the random medium model is built for the volcanism,and moreover the forward modeling is conducted for the characteristics of the seismic wave fields of the volcanic facieses through the two-dimensional wave equation simulation in this article. The simulation results show that the volcanic eruption facieses are characterized by high-frequency chaotic seismic facieses,while the volcanic overflow facieses are the continuous seismic facieses with the characteristics of low frequency and weak connectivity; the trend phase can well reflect the frequency characteristics of the wave fields of the volcanic rocks facies,and furthermore the application effects are much better with the help of the trend phase delineating the volcanic facieses.

关 键 词：火山岩相 随机介质 地震波场模拟 岩相识别 岩相圈定 

分 类 号：P618.13[天文地球—矿床学] P631.4[天文地球—地质学]