摘要
河西走廊至巴彦浩特盆地地区石炭纪地层厚逾千米,是一套海陆交互相含煤岩系,发育暗色泥岩、灰岩、煤层及碳质泥岩等3大类烃源岩。石炭系烃源岩有机质丰度较高,有机质类型以 型和 2型为主,绝大部分处于生油高峰至干气期,为良好的气源岩,并具有一定数量的生油能力。石炭纪地层具有良好的生储盖组合和适宜的成藏条件。根据石炭系石油地质条件分析,划分出巴彦浩特盆地、河西走廊东部、河西走廊西部等3个评价区块。其中,巴彦浩特盆地是最有利的油气区,河西走廊东部可作为远景目标,走廊西部油气地质条件较差。
Carboniferous strata,more than 1 000 m in thick in the area of Hexi corridor to Bayan Haot basin,is the coal measures of transitional phase, in which there are three kinds of hydrocarbon source rocks including dark mudstone,limestone, coal and carbonaceous mudstoneThese source rocks are good gas source rocks and have a certain extent of oilgenerating capability based on high abundance and typeⅡ2Ⅲ of organic matters And the most of them are the stage of 'oil window' to dry gasThere are well sourcereservoircap rock assemblages and suitable petroleum poolforming conditions in Carboniferous strataThree districts are divided based on the petroleum geological condition, in which the Bayan Haot basin is the most favorable exploration district,the eastern Hexi corridor is a prospect target and the western Hexi corridor lacks hydrocabonbearing prospect
出处
《西北地质》
CAS
CSCD
2003年第1期62-69,共8页
Northwestern Geology
