柴北緣?mèng)~卡地區(qū)中侏羅統(tǒng)油頁(yè)巖類型及成礦差異
發(fā)布時(shí)間:2018-04-13 23:39
本文選題:柴北緣 + 魚(yú)卡地區(qū); 參考:《大慶石油地質(zhì)與開(kāi)發(fā)》2017年04期
【摘要】:柴達(dá)木盆地魚(yú)卡地區(qū)中侏羅統(tǒng)石門(mén)溝組發(fā)育多層油頁(yè)巖,通過(guò)對(duì)YYY-1井全井巖心觀察和地化分析,在頁(yè)巖段和含煤段識(shí)別出兩種類型油頁(yè)巖。上部頁(yè)巖段油頁(yè)巖發(fā)育于深湖—半深湖環(huán)境中,含油率中等,單層和累計(jì)厚度均較大,w(TOC)為5.97%~15.35%,S_1+S_2為29.71~118.62 mg/g,有機(jī)質(zhì)類型主要為Ⅰ型、Ⅱ1型,有機(jī)質(zhì)來(lái)源主要以藻類體湖泊生物為主;下部含煤段油頁(yè)巖發(fā)育于湖沼環(huán)境中,含油率較高,單層和累計(jì)厚度均較小,且與煤和炭質(zhì)泥巖互層,w(TOC)為13.80%~48.80%,S_1+S_2為39.31~162.12mg/g,有機(jī)質(zhì)類型主要為Ⅱ2型,有機(jī)質(zhì)來(lái)源以陸源高等植物為主。沉積環(huán)境和有機(jī)質(zhì)來(lái)源是影響這兩種油頁(yè)巖礦床差異的關(guān)鍵因素。
[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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