特种油气藏2017，Vol.24Issue(5)：54-58,5.DOI:10.3969/j.issn.1006-6535.2017.05.010
莺歌海盆地天然气类型划分与来源分析
Type Classification and Origin Analysis of Natural Gas in the Yinggehai Basin
摘要
Abstract
The natural gas in the Yinggehai Basin is mainly coal related gas from Miocene series. Currently,there is not clear cognition on whether the natural gas type can be further divided and which source rock it came from, which restrains the exploration process of natural gas in this area. For solving the above problems,by fine dissection of the geochemical features of the natural gas in this basin,we analyzed them by geochemical data and thermal sim-ulation experiments of the source rock. The study results show that:(1)several parameters (δ13 C2 ,δ13 C1—δ13 C2 and C2/iC4 etc.)can be used to effectively subdivide the natural gas in this basin into type M and type S;(2)gas source analysis reveals that the above two types of natural gas individually came from the source rocks in the Meis-han Formation and the Sanya Formation. The carbon isotope values of heavy hydrocarbons in type M and type S nat-ural gas are consistent with the carbon isotope values of the source rocks in the Meishan Formation and the Sanya Formation,respectively. Type M natural gas has similar geochemical feature to the pyrolysed hydrocarbons from the mudstone in the Meishan Formation. This study provides theory support for natural gas exploration and hydrocarbon accumulation researches that are becoming more complex in this Basin.关键词
天然气/碳同位素/类型划分/烃源岩/莺歌海盆地Key words
natural gas/carbon isotope/type classification/source rock/Yinggehai Basin分类
能源科技引用本文复制引用
郭潇潇,熊小峰,徐新德,甘军,梁刚..莺歌海盆地天然气类型划分与来源分析[J].特种油气藏,2017,24(5):54-58,5.基金项目
国家"十三五"科技重大专项"莺琼盆地高温高压天然气富集规律与勘探开发关键技术"(2016ZX05024-005) （2016ZX05024-005）
