“跷跷板构造”对油气藏形成的影响分析——以埃塞俄比亚欧加登盆地为例  

Analysis of the influence of"Rocker Structure"on reservoir formation--Take the Ogaden Basin in Ethiopia as an example

作　　者：李军生 LI Jun sheng(GCL(Beijing)New Energy Technology Co.Ltd,Beijing,100016,China)

机构地区：[1]协鑫(北京)新能源科技有限公司,北京100016

出　　处：《内蒙古石油化工》2024年第12期111-116,共6页Inner Mongolia Petrochemical Industry

基　　金：协鑫集团重点科技项目,项目编号:A2020HWTRQ-Y001。

摘　　要：通过对欧加登盆地演化史的分析,了解该盆地中生代发生先东部抬升西部沉降,再西部抬升东部沉降的“跷跷板构造”的形成过程。对“跷跷板构造”与烃源岩生烃、排烃时间匹配进行研究,并通过包裹体的研究确定盆地内油气藏的形成期,以确定该区有利油气勘探目标。研究结果,该区的油气生成与排出运移均发生在“跷跷板构造”运动之前,因此,“跷跷板构造”运动对油气藏的形成和保存起到了重要的作用,体现在东部及西部早期形成的油气藏遭受破坏,区内的探井仅见到了油气显示,局部地区发现油苗。而盆地中间部位受“跷跷板构造”运动影响较小,油气藏能够有效保存。以上研究结果已被该区的勘探实践所证实。因此认为:“跷跷板构造”运动对盆地的沉积地层发育、油气的运移和聚集成藏具有重要的控制作用。Through the analysis of the evolutionary history of the Ogaden Basin,the formation process of the"Rocker Structure"that first uplifted the eastern part of the basin,western subsidence,and then uplifted the eastern settlement in the western part of the Mesozoic era in the basin was understood.The matching time of the"Rocker Structure"with the source rock hydrocarbon generation and excretion time was studied,and the formation period of the oil and gas reservoir in the basin was determined through the study of inclusions,so as to determine the favorable oil and gas exploration targets in the area.Therefore,the"Rocker Structure"movement played an important role in the formation and preservation of oil and gas reservoirs,which was reflected in the destruction of oil and gas reservoirs formed in the early stages in the east and west,and only saw oil and gas displays in the exploration wells in the area,and oil seedlings were found in local areas.However,the middle part of the basin is less affected by the movement of"Rocker Structure",and the oil and gas reservoir can be effectively preserved.The above results have been confirmed by the exploration practice of the zone.Therefore,it is believed that the movement of"Rocker Structure"has an important control effect on the development of sedimentary stratigraphy,oil and gas migration and accumulation of reservoirs in the basin.

关 键 词：欧加登盆地 勘探 “跷跷板构造” 烃源岩 油气聚集 影响 

分 类 号：P618.130.1[天文地球—矿床学]