柴达木盆地西部古近系-新近系优质烃源岩特征  

Characteristics of quality Tertiary source rocks in west Qaidam basin

作　　者：王力[1] 金强[2] 林腊梅[2] 刘永昌[1] 张博明[1] 

机构地区：[1]中国石油冀东油田勘探开发研究院 [2]中国石油大学·华东

出　　处：《天然气工业》2009年第2期23-26,共4页Natural Gas Industry

基　　金：国家自然科学基金项目“咸化湖盆有机质沉积及其烃源岩与盐类物质的相互作用研究”(编号:40572084);中国石油天然气股份有限公司“十五”科技攻关项目“柴达木盆地西部油气分布规律及勘探目标选择”(编号:KTY-2003-035)的联合资助

摘　　要：柴达木盆地西部古近系(E)—新近系(N)盐湖相烃源岩有机质丰度偏低,而且非均质性严重,利用有限的岩心岩屑实验室分析资料很难对其作出客观评价。为此综合有机地球化学和测井信息,建立了一套测井评价方法,得到了海量的烃源岩评价参数。分析这些数据后发现:与膏盐或芒硝互层的泥页岩和含膏盐泥页岩有机质丰度高(TOC>1.0%)、类型好,是该区的优质烃源岩;还分析了不同层系优质烃源岩分布规律:其中,E32优质烃源岩是主力生烃灶,其次是E31,而N11和N12中优质烃源岩则不太发育。As the Tertiary source rocks of salt lake facies in west Qaidam basin have relatively low organic abundance and strong heterogeneity,it is difficult to objectively evaluate them with limited laboratory analytical data of core and cutting.Organic geochemistry and logging data are integrated to establish a set of logging evaluation methods which are used to obtain a large amount of evaluation parameters of source rocks.Analysis of these data reveals that mud shale interbeded with halite or chuco and halite-bearing mud shale are quality source rocks with high abundance of organic matter(TOC>1.0%) and favorable organic types in the study area.In addition,the patterns of quality source rock distribution in different layers are also analyzed.The E32 quality source rock is the major hydrocarbon kitchen,followed by E31,while the N11 and N12 moderate source rocks are underdeveloped.

关 键 词：柴达木盆地 古近纪-新近纪 烃源岩特征 地球化学 测井 信息 评价 勘探有利区 

分 类 号：P618.13[天文地球—矿床学]