流体包裹体分析方法在惠民凹陷油气成藏研究中的应用  

Application of fluid inclusion analysis to hydrocarbon accumulation research in Huimin depression

作　　者：张金亮[1] 杨子成[1,2] 

机构地区：[1]中国海洋大学海洋地球科学学院,山东青岛266100 [2]大庆油田勘探开发研究院,黑龙江大庆163712

出　　处：《中国石油大学学报（自然科学版）》2008年第6期33-39,共7页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家“863”高技术研究发展计划项目(2006AA09Z336)

摘　　要：对惠民凹陷沙四段10个砂岩样品中的储层烃和包裹体烃进行了分离和色质分析。结果表明：临南地区正构烷烃中姥鲛烷略占优势，阳信地区正构烷烃中植烷占优势，检测出微弱含量的γ-和β-胡萝卜烷；包裹体烃和储层烃具有明显的湖相泥岩地球化学特征，生物标志物表明烃类母质富含湖相浮游植物和陆源高等植物；临南洼陷储层烃指示原油母源为淡水-微咸水沉积环境，阳信洼陷储层烃和包裹体烃母质沉积环境为微咸水沉积环境；惠民凹陷沙四段包裹体原油大部分为成熟油，来自沙四上烃源岩，储层油是沙三下低熟烃源岩和沙四上成熟烃源岩混合油；惠民凹陷油气成藏时间有两期注入，一期为东营组沉积时期，二期为馆陶-明化镇组沉积时期。The inclusion and reservoir hydrocarbon of 10 samples of sandstone of member 4 of Shahejie formation in Huimin depression were separated and detected by GC-MS. The results show that the pristane predominated in Linnan sag and the phytane predominated in Yangxin sag. A little content of γ- and β- carotenes were detected in n-alkanes. Inclusion hydrocarbon and reservoir hydrocarbon have distinct geochemical characteristics of lacustrine mudstone. The biomarker distributions show that the parent material types of these hydrocarbons are abundant of lacustrine phytoplankton and terrigenous higher plants. Reservoir hydrocarbon of Linnan sag indicate that its source rocks are deposited under fresh water and brackish water environment. The source rocks of inclusion and reservoir hydrocarbon within Yangxin sag are deposited under brackish water environment. Most of inclusion hydro- carbon in Huimin depression are mature oils and stem from member 4 of Shahejie formation. A few reservoir hydrocarbon originate from the immature source rock of member 3 and mature source rock of member 4. The accumulation phases of hydrocarbon reservoirs in the south slope are divided into two phases： the sedimentary period of Dongying formation and the sedimentary period of Guantao-Minghuazhen formation.

关 键 词：惠民凹陷 流体包裹体分析 油气包裹体 生物标志物 储层烃 

分 类 号：TE122.1[石油与天然气工程—油气勘探]