本文選題：三環(huán)萜烷 + 生物標志物�。� 參考：《石油與天然氣地質(zhì)》2017年02期

【摘要】：準噶爾盆地西北緣原油及烴源巖中生物標志物以高豐度的三環(huán)萜烷系列為典型特征,其分布樣式的差異一直被當作研究本區(qū)原油成因類型及油-源對比的典型指標。通過對烴源巖樣品的系統(tǒng)地球化學(xué)分析,認為本區(qū)風(fēng)城組源巖(P_1f)主要以三環(huán)萜烷(C_(20),C_(21),C_(23))呈"上升型"為特征,泥質(zhì)巖類與碳酸鹽巖類相比C24,C25三環(huán)萜烷含量較高;下烏爾禾組(P_2w)源巖和佳木河組(P_1j)源巖樣品三環(huán)萜均呈"下降型"分布特征。通過對源巖鏡下進行觀察和加水熱模擬實驗等方法,分別探討了沉積環(huán)境與母質(zhì)類型、成熟度及排烴作用對三環(huán)萜分布樣式的影響,認為P_1f和P_2w源巖中三環(huán)萜烷的分布主要受控于沉積環(huán)境和母質(zhì)類型的原生差異。P_1f源巖有機質(zhì)多源于本地沉積的藻類及細菌,沉積環(huán)境屬于蒸發(fā)、還原的咸化湖沉積;P_2w源巖中外來有機質(zhì)含量相對較多,沉積環(huán)境屬于淡水還原環(huán)境。P_1j源巖整體熱演化程度較高,有機質(zhì)炭化作用強烈;埋藏成熟演化在有機質(zhì)處于成熟-高熟階段內(nèi)對三環(huán)萜烷分布樣式影響不大,若達到過熟階段則會造成低碳數(shù)三環(huán)萜烷(C_(20),C_(21))含量增加;排烴作用對三環(huán)萜烷影響相對較小,不改變其分布樣式。
[Abstract]:The biomarkers in crude oil and source rocks in the northwestern margin of Junggar Basin are characterized by high abundance tricyclic terpene series, and the differences of their distribution patterns have been used as a typical index to study the genetic types of crude oil and oil-source correlation in this area. Based on the systematic geochemical analysis of source rock samples, it is considered that the source rock PSP _ 1f of Fengcheng formation in this area is mainly characterized by "ascending" type of tricyclic terpene C _ (20) C _ (20) C _ (1) C _ (21) T _ (23), and the content of C _ (24) C _ (25) tricyclic terpene is higher in argillaceous rocks than in carbonate rocks. The tricyclic terpenes in the source rocks of the Lower Wuerhe formation and the Jiamuhe formation are of "descending" type. The effects of sedimentary environment, parent material type, maturity and hydrocarbon expulsion on the distribution patterns of tricyclic terpenes were discussed by means of observation and hydrothermal simulation under source rock microscope. It is considered that the distribution of tricyclic terpene in P1f and P2w source rocks is mainly controlled by the primary difference between sedimentary environment and parent material types. The organic matter of P1f source rocks is mostly derived from native sedimentary algae and bacteria, and the sedimentary environment is evaporation. The content of organic matter in the source rocks of the reduced saline lake is relatively high, and the sedimentary environment belongs to the freshwater reduction environment. P1j source rocks have a relatively high thermal evolution degree and strong carbonization of organic matter. The buried maturity evolution has little effect on the distribution patterns of tricyclic terpenes during the maturation to high maturity stage of organic matter, and if it reaches the over-mature stage, it will result in an increase in the content of low carbon tricyclic terpene C _ (20) C _ (20) and C _ (20) C _ (20) C _ (20) C _ (20) C _ (20) C _ (21). Does not change its distribution style.
【作者單位】： 中國石油大學(xué)(北京)地球科學(xué)學(xué)院;中國石油勘探開發(fā)研究院;中國石油新疆油田公司實驗檢測研究院;
【基金】：國家科技重大專項(2016ZX05001005) 中石油新疆油田公司課題(2014-C4023)
【分類號】：P618.13

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