华北地区东部上古生界天然气勘探前景  

EXPLORATION PROSPECT OF UPPER PALAEOZOIC NATURAL GAS IN EASTERN AREA OF NORTH CHINA

作　　者：张忠民[1] 李春生 龙胜祥[1] 许化政[1] 

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]中国石油大庆试采分公司试油大队,黑龙江大庆163412

出　　处：《天然气地球科学》2006年第3期330-334,共5页Natural Gas Geoscience

基　　金：中国石油化工股份有限公司科技项目"中国东部区域地质综合研究与油气聚集带评价"(编号:P00002)资助

摘　　要：华北地区上古生界石炭-二叠系发育一套良好的煤系烃源岩,煤层及暗色泥岩厚度较大,烃源岩埋藏史可划分为4种类型,其天然气勘探的难点及关键问题在于弄清烃源岩的二次生烃潜力、范围和保存条件。结合构造演化及沉积史分析认为,主要发生了晚三叠世末期、早白垩世末期和喜山期3次深成变质作用,不同盆地烃源岩经历了不同的二次生烃过程,后期保存条件也各不相同,导致勘探潜力差异很大。在前人勘探研究工作的基础上,指出渤海湾南部是二次生烃的最有利地区,其保存条件好,天然气藏勘探前景广阔。A set of favorable Upper Paleozoic coal-bearing source rocks, with the more thick coal anct aarK mudstone, are developed in eastern area of North China. The key problems of the Upper Palaeozoic prospect are the potential of secondary hydrocarbon generation, distribution range of source rocks and preserve condition of natural gas in eastern area of North China. The bury history of Upper Paleozoic Carboniferous-Permian source socks can be divided into four types. According to structure and deposition history, the metamorphism of Upper Paleozoic source rocks mainly occurred at the end of later Triassic, the end of early Cretaceous, and during Himalayan. The exploration potential of each basins, with different secondary hydrocarbon generation and preserve condition of natural gas, is different greatly. Based on a large amount of basic geological information, the conclusion had been obtained that the southern Bohai Bay, with good secondary hydrocarbon generation and petroleum preserve conditions, is a favorable Upper Palaeozoic natural gas prospect place.

关 键 词：上古生界 有机质热演化 二次生烃 勘探潜力 华北地区东部 

分 类 号：TE132.1[石油与天然气工程—油气勘探]