网络出版日期: 2014-08-15
基金资助
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
Organic geochemistry characteristics of source rocks in Liaohe Depression
Online published: 2014-08-15
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。
赵会涛 , 王怀厂 , 刘健 , 丁雪峰 , 刘燕 . 辽河断陷烃源岩有机地球化学特征[J]. 岩性油气藏, 2014 , 26(4) : 110 -116 . DOI: 10.3969/j.issn.1673-8926.2014.04.016
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 Rock-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 chromatogram 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.
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