辽河断陷烃源岩有机地球化学特征  

Organic geochemistry characteristics of source rocks in Liaohe Depression

作　　者：梁明亮[1,2] 王作栋[1] 郑建京[1] 李晓光 王晓峰[1] 钱宇[1,2] 

机构地区：[1]中国科学院油气资源研究重点实验室,兰州730000 [2]中国科学院大学,北京100049 [3]中国石油辽河油田分公司勘探开发研究院,辽宁盘锦839009

出　　处：《岩性油气藏》2014年第4期110-116,共7页Lithologic Reservoirs

基　　金：国家自然科学基金项目"低熟烃源岩中特殊含氧内酯物及地质意义"(编号:41072106)资助

摘　　要：为了研究辽河断陷东、西部凹陷烃源岩地球化学特征的差异及其与油气形成的关系,利用RockEval和气相色谱-质谱联用仪(GC-MS)对断陷内古近系沙河街组烃源岩进行了详细的有机地球化学特征研究。通过对18块烃源岩可溶有机质饱和烃进行GC-MS测试和生物标志化合物的分析,并分别在东、西部凹陷烃源岩饱和烃馏分m/z 191和m/z 231质量色谱图中检测到了松香烷和甲基甾烷系列化合物,显示出相同(近)层段烃源岩不同的生物标志化合物特征。研究结果表明:东、西部凹陷相同(近)层段烃源岩形成的古环境、母源输入等存在显著差异,这可能是造成东、西部凹陷烃源岩差异,并影响辽河断陷东、西部凹陷油气藏差异的重要原因。In order to study the characteristics of source rocks for the hydrocarbon formation between western and eastern sags in Liaohe Depression, this paper studied the organic geochemistry characteristics of source rocks of Shahejie Formation by using Roek-Eval and GC-MS detection on saturated hydrocarbons. The GC-MS analysis and biomarker analysis of organic matter saturated hydrocarbon of 18 blocks of source rocks show the different biomarker characteristics of the same formation, and abietanes and methylsteranes compounds were detected in mass chromato- gram at m/z 191 and m/z 231 respectively in the eastern and western sags. The results show that there are significant differences in the depositional environment and precursor input between the western and eastern sags in Liaohe Depression, and those might be important reasons for the differences of source rocks and hydrocarbon accumulation between western and eastern sags in Liaohe Depression.

关 键 词：烃源岩 生物标志化合物 GC-MS测试 沙河街组 辽河断陷 

分 类 号：TE122[石油与天然气工程—油气勘探]