摘要
从盆地分析入手,以热作用为主线,用动平衡观点研究中国天然气地质特征是我们的总体思路。以盆、热、烃为理论基础,围绕天然气形成环境和资源分布,本文提出了三种相互关联的盆地综合分类(热分类,构造分类及油气资源比例分类)。中国天然气主要来源于四个领域(未熟层系、含煤层系、碳酸盐岩系和湖相碎屑岩系),分属五种成因类型(生物气、生物-热催化过渡带气、油型气、煤成气及深源气)。大、中型气田形成的地质条件是:一定的生气强度;厚度较大的常规储层;生气期与成藏期较晚;发育有古隆起与古圈闭;有良好的区域盖层;有断层及不整合面为输导等地质因素的综合结果。主要有四大含气领域(煤成气、海相碳酸盐岩气、湖相腐泥气和生物气),四大含气区的资源前景序次是:近海气区、西北气区、中部气区和东部油气区。中国今后天然气勘探的总方针是大中小型并举,远中近期兼顾。
The main idea of studying the geological properties of natural gas in China is that tostart from basin analysis,take thermal effect as fundamental principle,and use the view-point of dynamic equilibrium.Based on the theory of the relationship between basin,ther-mality,hydrocarbon,centered on the formation environment and the resources distributionof natural gas,three kinds of interrelated classification such as thermal,structural and oil-gas resources proportional classfications of the basins were proposed in this paper.Naturalgas in China is mainly come from sets of immature sequences,coal-bearing formations,carbonate rook series and lacustrine clastic rooks,and belongs to five genetic types namedas biogenic gas,biogenic-thermal catalytic gas,sapropelic gas,humic gas and deep sourcedgas.The geological conditions to form big-and medium-size gas fields are:1.certain gas-generating capacity;2.conventional reservoir of considerable thickness;3.late gas-generating stage and pool-forming stage;4.the development of paleo-uplift and paleo-traps;5.favourable regional caprocks;6.faults and unconformities as passage ways forgas migration.There are mainly four gas-bearing domains in China including humic gas,marine carbonate rock gas,lacustrine sapropelic gas and biogas.They are mainly distribut-ed in four major gas provinces which are arranged in the following order:offshore North-west China,Central China and East China oil and gas provinces.The general policy fornatural gas exploration in China is“to explore large-medinm-and small size gas fieldscontemporaneously and to give consideration to long,medium and short terms planning”
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
1992年第3期237-244,共8页
Oil & Gas Geology
