茌平构造带古生界原生油气勘探前景

THE EXPLORATION POTENTIAL IN THE PALEOZOIC IN CHIPING STRUCTURAL ZONE

柳忠泉 纪晓东 逄建东

Liu Zhongquan Ji Xiaodong Pang Ji

胜利石油管理局地质科学研究院, 山东东营 257015

Institute of Geological Science of Shengli Petroleum Administration, Dongying 257015

茌平构造带处于鲁西隆起西北倾伏区的中部,是被带内次级断层复杂化的呈北北东向展布的断层背斜带.本文系统分析了该带构造演化特征及原生油气成藏条件:三叠纪末挤压隆起,早中三叠世地层广遭剥蚀,同时产生了兰聊断层,在兰聊断层控制下,茌平构造带定型于燕山期(喜山期以整体抬升为主,带内次级断层基本停止活动),这对古生界烃源岩二次成烃与圈闭形成的时间配套条件较为有利.本区发育有下古生界开阔(局限)海暗色(泥)灰岩和上古生界煤系两套烃源岩,下古生界顶风化壳作为良好储层,构成了自生自储成藏组合,油气远景的关键在于盖层,该带C-P残留区油气勘探远景较好.

Chiping structural zone is a north north east trending fracture anticline belt being complicated by secondary faults,which located in the center of the northwest plunging area of Luxi uplift.The features of structural evolution and the conditions of hydrocarbon accumulation were systematically analysed in the paper.Due to compression and uplift at the end of the Triassic,the Lower and Middle Triassic sequences were widely eroded and Lanliao fault was formed simultaneously.Controlled by Lanliao fault,Chiping structure was finally formed during the Yanshanian period.It is favorable for matching of the secondary generation of the Paleozoic source rocks and the formation of traps.There are 2 sets of source rocks,i.e.the Lower Paleozoic open (limited) sea dark rocks and the Upper Paleozoic coal bearing sequences.The weathering crust at the top of the Lower Paleozoic can act as reservior.The key factor for formation of hydrocarbon pools is the seal.There are more potential for hydrocarbon exploration in the C P residual area of the zone.

https://doi.org/10.11781/sysydz199901048