柴北缘鱼卡地区中侏罗统油页岩类型及成矿差异

发布时间：2018-04-13 23:39

  本文选题：柴北缘 + 鱼卡地区　； 参考：《大庆石油地质与开发》2017年04期

【摘要】：柴达木盆地鱼卡地区中侏罗统石门沟组发育多层油页岩,通过对YYY-1井全井岩心观察和地化分析,在页岩段和含煤段识别出两种类型油页岩。上部页岩段油页岩发育于深湖—半深湖环境中,含油率中等,单层和累计厚度均较大,w(TOC)为5.97%~15.35%,S_1+S_2为29.71~118.62 mg/g,有机质类型主要为Ⅰ型、Ⅱ1型,有机质来源主要以藻类体湖泊生物为主;下部含煤段油页岩发育于湖沼环境中,含油率较高,单层和累计厚度均较小,且与煤和炭质泥岩互层,w(TOC)为13.80%~48.80%,S_1+S_2为39.31~162.12mg/g,有机质类型主要为Ⅱ2型,有机质来源以陆源高等植物为主。沉积环境和有机质来源是影响这两种油页岩矿床差异的关键因素。
[Abstract]:There are many layers of oil shale in the Shimenggou formation of Middle Jurassic in Yuka area of Qaidam Basin. Two types of oil shale have been identified in shale and coal-bearing section by core observation and geochemical analysis of the whole well of YYY-1 well.The oil shale of the upper shale segment is developed in the environment of deep lake and half deep lake, with medium oil content, with a large monolayer and accumulative thickness. The oil shale in the upper shale segment is 5.97% and 15.35%. The number of S / S _ 2 is 29.71 ~ 118.62 mg / g / g. The main types of organic matter are type 鈪，

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