华北地台南缘下古生界天然气勘探有利区域探讨

在华北板块上，陕甘宁盆地近年来发现了世界级大型气田，为同一地台的其他地区天然气勘探带来了光明和希望。华北地台南缘下古生界经多年的油气勘探证明，位于河南境内的太康隆起具有多套生油层系及一定的生成能力，是油气勘探的主要区域。该储集岩的控制因素较多，主要因素有：潮坪相具有形成良好储层的物质条件；粉晶白云岩和含膏白云岩是孔隙发育的最有利岩石类型；构造运动是油气保存的重要条件。综合分析认为，太康隆起下古生界天然气最有利的储集层段：在纵向上为峰峰组和上马家沟组Ⅲ段，横向分布于郑州—开封以南，郑州—新郑以东，范村—孙营—白潭一线以西区域。

DISCUSSING ON FAVORABLE PROSPECTING AREA FOR NATURAL GAS FROM LOWER PALAEOZOIC IN SOUTHERN MARGIN OF HUABEI PLATFORM

World class gas field is found in Shan Gan Ning basin of Huabei platform in recent years.This brings a promising future for finding new gas field in other zone of the same platform.Through gas exploration several years it is proved that Taikang uplift has setting of oil generating strata,so it is the a good prospecting area for natural gas.There are many factors are favorable which reservoir gas in the Lower Paleozoic this area,but the main factors are like these: Good material condition of reservoir formation in tidal flat facies dolomicrate the best petrographic category for pore in gypsiterous dolomite.Tectonic movement is the main factor for oil reservoir. Thus we conclude that the advantageous oil reservoir zone in Low Palaeozoic is in Fengfeng Formation and upper Majiagou Formation and south of Zhengzhou Kaifeng,east of Zhengzhou Xinzheng,west of Fancun Sunying Baitan are favorable prospecting area.