地质与资源2026，Vol.35Issue(1)：84-94,26,12.DOI:10.13686/j.cnki.dzyzy.2026.01.008
松辽盆地北部晚二叠世林西组烃源岩特征及油气前景
Characteristics and hydrocarbon potential of source rocks in the Late Permian Linxi Formation,northern Songliao Basin
摘要
Abstract
Thick sequences of dark mudstone of the Upper Permian Linxi Formation are developed in northern Songliao Basin.To assess the hydrocarbon potential of this formation in the area,multiple geological survey wells were drilled and encountered a large suite of dark mud slate.Geochemical analyses,including source rock geochemistry and saturated hydrocarbon gas chromatography-mass spectrometry(GC-MS),were conducted to evaluate its geochemical characteristics,organic matter type,and depositional environment.The results indicate that the source rocks exhibit relatively high organic matter abundance,rating as fair to good.The organic matter is predominantly Type Ⅱ and has reached a high to over-mature thermal evolution stage.The average illite crystallinity is 0.54(＞0.42),indicating a diagenetic stage without metamorphism.Biomarker data point to a strongly reducing to reducing depositional environment,favorable for organic matter preservation,with a mixed organic input derived from higher plants and lower aquatic organisms such as algae.The source rocks in the Upper Permian Linxi Formation have entered the gas-generation window,representing a promising interval for deep hydrocarbon exploration in the Songliao Basin and offering potential for shale-gas exploration.关键词
松辽盆地/晚二叠世/林西组/烃源岩/生物标志化合物Key words
Songliao Basin/Late Permian/Linxi Formation/source rock/biomarker分类
天文与地球科学引用本文复制引用
黄欣,张海华,张健,张德军,苏飞,卞雄飞,郑月娟,张渝金..松辽盆地北部晚二叠世林西组烃源岩特征及油气前景[J].地质与资源,2026,35(1):84-94,26,12.基金项目
中国地质调查局项目大兴安岭成矿带地段区域地质调查(DD202402079) （DD202402079）
中国地质调查局沈阳地质调查中心主任基金项目(SJ202306). （SJ202306）
