Genesis Type and Source Analysis in Lower Cretaceous of Changling Depression in Songliao Basin
详细信息
- 责任者：Sun Mingliang (State Key Laboratory of Petroleum Resources and Prospecting ; China University of Petroleum ; Beijing 102249 ; China) ; Liu Guangdi
- 刊名：Geoscience
- 出版年：2013
- 卷期：27(5)
- 关键词：天然气成因 ; natural gas origin ; 松辽平原 ; Songliao Plain
- 页码：p.1186-1192
- 图表：6 illus., 2 tables, 14 refs.
- 分类号：1003
- issnNo：ISSN1000-8527
- isbnNo：CN11-2035/P
摘要
The component and generation of natural gases are complicated in Lower Cretaceous of Changling depression in Songliao Basin.It is significance to confirm the generation and source rock of natural gases,which is importance 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.
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