襄城凹陷未熟—低熟油形成条件探讨  

Discussion on Condition of Immature-Low Mature Oil Formation in Xiangcheng Sag

作　　者：姚亚明[1] 张连生[1] 乔桂林[2] 严永新[2] 何明喜[2] 马万怡[2] 

机构地区：[1]中国保利集团公司保利科技有限公司,北京100010 [2]河南石油勘探局,河南南阳473132

出　　处：《天然气地球科学》2010年第5期815-821,共7页Natural Gas Geoscience

基　　金：国家重点基础研究发展计划("973")项目"多种能源矿产共存成藏(矿)机理与富集分布规律"项目(编号:2003CB214600)资助

摘　　要：从襄城凹陷所处的区域构造背景、沉积环境变迁等主要地质问题出发,结合烃及原油的有机地球化学特征,采用有机显微组分分析、生物标志物检测、有机岩石学研究等方法,对烃有机质丰度、类型,特别是生烃母质来源进行了深入的分析,阐明了襄城凹陷核桃园组未熟油的判别标志和成因类型,探讨了未熟—低熟油藏形成的主要地质条件,指出研究区勘探应以核二段为主要目的层,以寻找短距离运移聚集、自生自储的断鼻、岩性、裂隙油气藏为主。In the view of main geologies of regional tectonic setting and sediment environmental changes in Xiangcheng sag,combining with organic geochemistry of source rock and crude oil,we used organic macerals,inspecting biomarkers and organic petrology to illustrate organic matter abundance and type of source rocks,especially for the parent source of hydrocarbons.We also elucidated the discriminating indices and genetic origin of immature oil in Hetaoyuan Formation of Xiangchen sag,and pointed out the main geological conditions for immature-low mature oil formation.We suggested that self-generating and self-preserving fault noses,lithological and fracture reservoirs would be a favorable exploration area in the Eh2 Member,for these reservoir has the short migration and handy accumulation of oil and gas.

关 键 词：襄城凹陷 有机地球化学 显微组分 未熟—低熟油 形成条件 

分 类 号：TE122.2[石油与天然气工程—油气勘探]