本文選題：羌塘盆地 + 石炭—二疊系　； 參考：《中國地質(zhì)》2017年03期

【摘要】：長期以來,羌塘盆地?zé)N源巖的研究一直限于中生代地層,而對其古生代地層生烴能力一直缺乏系統(tǒng)研究。針對這一問題,本文選擇羌塘盆地石炭—二疊系8條剖面的暗色泥巖及碳酸鹽巖樣品,對其從有機質(zhì)豐度、有機質(zhì)類型和熱演化程度等方面進行了有機地球化學(xué)特征的分析。研究發(fā)現(xiàn),石炭—二疊系可能烴源巖類型包括泥巖和碳酸鹽巖兩種,其分布總體上受沉積相的控制,碳酸鹽巖烴源巖可能為局限臺地相發(fā)育的泥晶灰?guī)r,而泥質(zhì)烴源巖主要為三角洲及斜坡相發(fā)育的暗色泥巖及凝灰質(zhì)泥巖。石炭—二疊紀泥巖有機碳含量較高,具有較好生烴能力,大多達到烴源巖標準,尤其是刻莫石炭系剖面及貢日二疊系剖面,大多為中等—好烴源巖。碳酸鹽巖有機碳含量總體比較低,為非烴源巖。石炭—二疊系碳酸鹽巖烴源巖有機質(zhì)類型為Ⅱ1型,泥質(zhì)烴源巖有機質(zhì)類型主要為Ⅱ2-Ⅲ型。石炭—二疊系烴源巖熱演化程度總體較高,除盆地東部刻莫石炭系剖面處在成熟階段外,大都處在高成熟—過成熟階段,非常有利于天然氣的生成,具備良好的天然氣勘探前景。
[Abstract]:For a long time, the study of source rocks in Qiangtang Basin has been confined to Mesozoic strata, but the hydrocarbon generation ability of Paleozoic strata has been lack of systematic study. In order to solve this problem, the samples of dark mudstone and carbonate rock from 8 sections of Carboniferous-Permian system in Qiangtang Basin are selected, and their organic geochemical characteristics are analyzed from the aspects of organic matter abundance, organic matter type and thermal evolution degree. It is found that the Carboniferous and Permian possible source rock types include mudstone and carbonate rock, whose distribution is controlled by sedimentary facies, and carbonate source rock may be mudstone with limited platform facies. The shaly source rocks are mainly dark mudstone and tuffaceous mudstone developed in delta and slope facies. The Carboniferous and Permian mudstones have high organic carbon content and good hydrocarbon generation ability, and most of them meet the source rock standard, especially the Carboniferous and Gongri Permian sections, most of which are intermediate-good source rocks. The organic carbon content of carbonate rock is relatively low and is a non-hydrocarbon source rock. The organic matter type of Carboniferous and Permian carbonate source rocks is type 鈪，

本文編號：2039732