摘要
济阳坳陷残留上古生界为石炭系—二叠系,大体上以无棣凸起—滨县凸起—陈家庄凸起为界,分为南、北两个区域,推测最大厚度位于惠民凹陷西部,可达1200m。烃源岩主要为煤、碳质泥岩及暗色泥岩,其中以太原组和山西组的煤层和暗色泥岩最发育。大致经历了印支期、燕山期及喜马拉雅期等三次埋藏—隆升旋回交替演化,初次生烃期为中三叠世末,最重要的二次生烃期为早第三纪末。上古生界受热史与埋藏史曲线具有相似性,说明构造-埋藏史是控制烃源岩热演化的主要因素。依据埋藏-生烃史的不同,可划分出四类构造演化组合。其中中凹新凸型生烃演化地区有利于寻找上古生界次生油气藏;中凸新凹型和中凹新凹型生烃演化地区有利于寻找古生古储型油气藏。
The remnant Paleozoic strata are Carboniferous-Permian rocks bordered by Wudi Arch-Binxian Arch- Chenjiazhuang Arches in Jiyang depression, which are separated into the south and the north areas. It is estimated that the thickest strata （nearly 1200m） lies in the west part of Huimin Sag. Source rock include coal measures, calcareous mudstone and dark mudstone,in which Taiyuan and Shanxi coalbeds and dark mudstone are most developed.Three alternated cyclic tectonic evolutions of the source rock were undergone during Indo-Sinian, Yanshanian and Himalayan orogenies.The first hydrocarbon generation occurred during the end of Middle Triassic period,and the second hydrocarbon generation, or the most important period, was during the end of Early Tertiary. The resemblance of Upper Paleozoic thermal history curve with the burial history curve indicates that the tectonicburied process is the main factor controlling the thermal evolution for the source rock. Based on different tectonicburied histories, four different assemblages of tectonic evolution may be classified in Jiyang Depression.Some potential reservoirs favorable to hydrocarbon discovery are suggested.
出处
《海相油气地质》
2008年第1期25-32,共8页
Marine Origin Petroleum Geology
基金
地调项目"东部叠合盆地深层油气成藏潜力评价"经费资助
编号1212010633604
关键词
烃源岩
构造演化
烃类演化
演化类型
早古生代
济阳坳陷
Source rock
Tectonic evolution
HydroHydrocarbon evolution
Evolution type
Early Paleozoic
Jiyang Depression
