翼东老爷庙地区第三纪火山岩

The Tertiary Volcanic Rocks and Its Oil-Gas Potentiality at the Lauye Miao, Eastern Hebei Province

通过系统观察和取样分析,对翼东老爷庙地区第三纪地层中的火山岩岩性、岩相类型、储集性能、含油性以及火山岩周围地层古地温变化进行了探讨。结果表明,火山岩可划分为火山爆发相、火山喷溢相和次火山相,其储集性能较差,不能形成油层,但火山爆发相和火山喷溢相中的火山碎屑岩和玄武岩的储集性能稍好,对储气可能有效;火山岩周围地层由于受烘烤而出现温度异常,影响了周围泥岩中的有机质成熟度。

By sampling and analyzing systematically, the lithology of reservoir and oil-bearing probability of the Tertiary volcanic rocks in Laugye Miao district, eastert Hebei Province, are primarily studied in present paper, and the change of the geothem around the volcanic rocks is also analyzed. The results indicate that 3 types of facies which are explosive, effusive and subvolcanic facies can be divided. Their potentiality of reservoir is too bad to form oil-producing formation, expect for the pyroclastic rocks and basalt in the explosion and effusion facies may become gas-reservoir. The geotherm of the formation around the volcanic rocks is abnormally high due to being coasted, which influences on the maturity of the organic matter in the mudstone.