现代地质Issue(5)：1186-1192,7.
松辽盆地长岭断陷下白垩统天然气成因及气源分析
Genesis Type and Source Analysis in Lower Cretaceous of Changling Depression in Songliao Basin
摘要
Abstract
The component and generation of natural gases are complicated in Lower Cretaceous of Changling depres-sion in Songliao Basin.It is significance to confirm the generation and source rock of natural gases,which is impor-tance to oil exploration in this area.On the basis of the component analysis and carbon isotope characteristics,the genesis types of natural gases in Lower Cretaceous were identified.The natural gas was coal-type gas in Haerjin structure,and oil-type gas in Dalaoyefu structure and upper part of Fulongquan structure,and mixing-type gas in Shuangtuosi structure and lower part of Fulongquan structure.The dioxide carbon gas in No.2 and No.6 Changling structure is inorganic genetic gas of mantle source.The abnormal sequence of stable carbon isotopes in hydrocarbon accumulation was properly caused by gas diffusion.Combined with the genesis type of natural gases and geology conditions,the main source rocks were confirmed to be Yingcheng Formation and Shahezi Formation.关键词
天然气/成因类型/同位素倒转/扩散/长岭断陷Key words
natural gas/genesis type/carbon isotope sequence abnormal/diffusion/Changling depression分类
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孙明亮,柳广弟..松辽盆地长岭断陷下白垩统天然气成因及气源分析[J].现代地质,2013,(5):1186-1192,7.基金项目
国家自然科学基金项目（41102086）；中国石油大学（北京）理论研究专项计划（LLYJ-2011-10）。 （）
