胡维强;马立涛;刘玉明;李洋冰;陈鑫;柳雪青;王朵;黄英;乔方;马丽华;刘成;

• 1:中海油能源发展股份有限公司工程技术分公司

摘要(Abstract)：

利用岩石热解、有机碳、干酪根碳同位素、镜质体反射率及气相色谱—质谱等地球化学测试方法,分析苏北盆地海安凹陷曲塘次凹阜宁组二段烃源岩的生烃潜力及沉积环境。结果表明:曲塘次凹阜宁组二段烃源岩具有有机质丰度较高、类型好、低成熟—成熟阶段及生烃潜力强等特征。残余有机碳质量分数平均为1.77%,生烃潜量为6.20mg/g,有机质丰度较高。干酪根碳同位素为-29.2‰～-27.7‰,规则甾烷呈不对称"V"型或反"L"型分布,有机质属于Ⅱ型,具有低等水生生物和高等植物双重生源特征。镜质体反射率为0.50%～0.80%,ααα-C29(20S/(20S+20R))甾烷和ββ/(αα+ββ)-C29甾烷较低,有机质处于低成熟—成熟阶段。Pr/Ph较高,三环萜烷/C30藿烷、伽马蜡烷指数、Ts/Tm和重排甾烷C27/规则甾烷C27较低,烃源岩主要形成于弱氧化条件下的淡水—半咸水湖泊相环境,有利于有机质的保存。该研究结果为苏北盆地海安凹陷曲塘次凹下一步勘探提供参考。

关键词(KeyWords)：烃源岩;地球化学特征;生物标志化合物;阜宁组二段;曲塘次凹;海安凹陷;苏北盆地

Abstract:

Keywords:

基金项目(Foundation):国家自然科学基金项目(41502132);; 中国海洋石油总公司科研条件平台建设项目(CNOOC-KJPTGCJS2016-01)

作者(Author):胡维强;马立涛;刘玉明;李洋冰;陈鑫;柳雪青;王朵;黄英;乔方;马丽华;刘成;

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