柴达木盆地北缘天然气地球化学特征及其石油地质意义
发布时间：2018-11-19 09:40
【摘要】：为了明确柴达木盆地北缘地区天然气的成因和天然气分布规律,综合利用天然气组份及碳同位素等手段对天然气地球化学特征进行了分析。研究表明,柴北缘天然气以甲烷为主,重烃含量相对较高,不同构造带天然气组分具有明显的差异性。碳同位素分析表明,δ~(13)C_1和δ~(13)C_2值分别介于-36.4‰~19.3‰和-27.4‰~-19.82‰。天然气成因鉴别表明,该区天然气主体为煤型气,来自侏罗系烃源岩。柴北缘碳同位素分布主体为正序列特征,受不同成熟度、不同类型源岩混合以及过成熟阶段源岩等因素影响,部分地区存在天然气碳同位素倒转现象。柴北缘天然气平面分布具有分带性,烃源岩成熟度控制了油气分布,天然气位于成熟-高成熟区及附近。冷湖六号-冷湖七号、鄂博梁-葫芦山构造带以及阿尔金山前是下一步天然气勘探的重点领域。
[Abstract]:In order to understand the origin and distribution of natural gas in the northern margin of Qaidam Basin, the geochemical characteristics of natural gas are analyzed by means of natural gas composition and carbon isotope. The results show that methane is the main natural gas and the content of heavy hydrocarbon is relatively high in the northern margin of Qaidam. The composition of natural gas in different tectonic zones is obviously different. The carbon isotope analysis shows that 未 ~ (13) C _ 1 and 未 ~ (13) C _ 2 are between -36.4 鈥，
本文编号：2341897
[Abstract]:In order to understand the origin and distribution of natural gas in the northern margin of Qaidam Basin, the geochemical characteristics of natural gas are analyzed by means of natural gas composition and carbon isotope. The results show that methane is the main natural gas and the content of heavy hydrocarbon is relatively high in the northern margin of Qaidam. The composition of natural gas in different tectonic zones is obviously different. The carbon isotope analysis shows that 未 ~ (13) C _ 1 and 未 ~ (13) C _ 2 are between -36.4 鈥，
本文编号：2341897
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