西藏中倉(cāng)盆地古近系丁青湖組生烴潛力與沉積有機(jī)相分析
發(fā)布時(shí)間:2018-03-31 14:51
本文選題:中倉(cāng)盆地 切入點(diǎn):丁青湖組 出處:《東北石油大學(xué)學(xué)報(bào)》2017年04期
【摘要】:以中倉(cāng)盆地古近系丁青湖組為研究對(duì)象,根據(jù)烴源巖地球化學(xué)數(shù)據(jù)分析,探討研究區(qū)丁青湖組生烴潛力及沉積有機(jī)相。結(jié)果表明:中倉(cāng)盆地中丁青湖組灰?guī)r、泥灰?guī)r和泥巖為主要烴源巖。其中,灰?guī)r、泥灰?guī)r有機(jī)碳平均質(zhì)量分?jǐn)?shù)為0.33%,泥巖有機(jī)碳平均質(zhì)量分?jǐn)?shù)為0.32%,屬于較差烴源巖;有機(jī)質(zhì)類型為以Ⅱ1型為主的混合Ⅱ型,烴源巖熱解峰溫為422~446℃,鏡質(zhì)體反射率為0.48%~0.59%,屬于低成熟階段。根據(jù)顯微組分將沉積有機(jī)相劃分為濕地草本混生(沼澤)相。綜合數(shù)據(jù)分析表明中倉(cāng)盆地不具有較好的生烴潛力。這對(duì)認(rèn)識(shí)中倉(cāng)盆地油氣勘探價(jià)值,以及在倫坡拉盆地群中尋找油氣具有指導(dǎo)意義。
[Abstract]:Based on the geochemical data of source rocks, the hydrocarbon generation potential and sedimentary organic facies of the Dingqing Lake formation in Zhongcang Basin are discussed. The results show that the limestone of the Middle Dingqing Lake formation in Zhongcang Basin. The main source rocks are marl and mudstone, in which the average organic carbon content of limestone and marl is 0.33, the average organic carbon mass fraction of mudstone is 0.32, which belongs to poor source rock, and the organic matter type is mixed type 鈪,
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