地震属性在预测生物气中的应用——以柴达木盆地三湖地区台南构造为例  

Application of Seismic Attributes in Detecting Biogas——By Taking Tainan Structure of Sanhu Area in Qaidam Basin for Example

作　　者：史晓辉[1] 倪祥龙[1] 李红哲[1] 许建权[1] 杨露[2] 

机构地区：[1]中国石油勘探开发研究院西北分院,甘肃兰州730020 [2]中国石油大学(北京)地球科学学院,北京100086

出　　处：《石油天然气学报》2014年第1期50-54,6,共5页Journal of Oil and Gas Technology

基　　金：国家科技重大专项(2011ZX05003);中国石油天然气集团公司重大科技专项(2011E-03)

摘　　要：柴达木盆地三湖地区台南构造生物气藏分布范围广,生物气资源非常丰富但分布规律十分复杂,且该区地震资料品质差,反射特征复杂,严重制约了该区生物气的勘探开发。在高精度地震数据的基础上,通过地震反射特征分析,对地震属性进行提取和筛选,并结合实钻测井资料,确定了三湖地区台南构造最能反映储层生物气变化特征的3种地震属性——平均频率、吸收系数、烃指数。经钻井资料证实,3种地震属性能够较好地检测出台南构造生物气储层的地质层位及平面分布范围,为台南构造气田拓展及其边界的确定提供了重要依据。In Tainan Structure of Sanhu Area in Qaidam Basin,biogas was distributed widely,and biogas resources were rich but their distributive law was very complex.The seismic data quality was poor,and seismic reflection features were complex,the biogas exploration and development were severely restricted.Based on the study of high accuracy seismic data and the analysis on seismic reflection features,seismic attributes were extracted and selected,combined with logging and drilling data,three types of seismic attributes were determined that could best reflect the characteristics of biogas changes in reservoirs of Tainan Structure,which included average frequency,hydrocarbon index and absorption coefficient.It is demonstrated by drilling data that the three types of attributes can be used to better detect the geological horizon and plane distribution ranges of the biogas reservoirs,it provides important evidences for broadening gas fields and confirming its boundary in Tainan Structure of Sanhu Area.

关 键 词：地震属性 烃类检测 生物气 柴达木盆地 三湖地区 

分 类 号：P631.4[天文地球—地质矿产勘探] P618.13[天文地球—地质学]