摘要
延吉盆地具二隆二坳的构造格局,盆地内发育中生界铜佛寺组和大砬子组两套烃源岩。东部、西部两坳陷两个组有机质丰度发育不均,西部朝阳川凹陷铜佛寺组有机质丰度高,东部清茶馆、德新凹陷大砬子组有机质丰度高,有机质类型以Ⅱ、Ⅲ型为主,且大多进入生油门限。各组储层物性明显不同,盖层主要是产油层组内发育的泥岩,由于太平隆起上缺失大砬子组、铜佛寺组地层,没有形成全盆地盖层,是本区油气聚集和保存的不利因素。延吉盆地存在朝阳川、清茶馆-德新两个含油气系统。通过含油气系统特征分析,发现朝阳川凹陷生油强度最大区周缘,清茶馆凹陷生油区的西缘、南缘,以及德新凹陷北部隆起带为本区的重点勘探目标。
Yanji Basin formed a structural framework with two-uplift and two-downwarp. Tongfosi and Dalazi formations are the source rocks in Yanji Basin. The abundance of organic matter in these formations is not developed equally in eastern and western depressions, higher in Tongfosi formation of Chaoyangchuan depression and in Dalazi Formation of Qingchaguan and Dexin depression. The main organic matter types areⅡand Ⅲ. They all attained oil generating threshold. The petrophysical properties of reservoirs are different among formations. The cap rock is the mudstone of pay bed. The unfavorable factors for oil-gas gathering and preserving are lack of Tongfosi and Dalazi Formations in Taiping uplift and that the cap rock of whole basin is not taken form. There are two oil systems in Yanji Basin. The characteristic analysis of oil systems shows that the main exploration targets include the round edge of source zone in Chaoyangchuan depression, the south and west edge of source zone in Chaoyangchuan depression, and north mole track of Dexin depression.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2004年第2期227-230,241,共5页
Journal of Jilin University：Earth Science Edition
基金
大庆油田有限责任公司研究项目(Q/DYY-KY-16-1-2003)
关键词
成藏条件
含油气系统
油气勘探
延吉盆地
Yanji Basin
oil-gas accumulation condition
oil-bearing system
exploration target
