| 松辽盆地朝长地区原油的地球化学特征 |
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| 引用本文： | 侯读杰,王铁冠,孔庆云,冯子辉,黄福堂.松辽盆地朝长地区原油的地球化学特征[J].中国石油大学学报(自然科学版),1999(2). |
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| 作者姓名： | 侯读杰 王铁冠 孔庆云 冯子辉 黄福堂 |
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| 作者单位： | 1. 石油大学地球科学系,北京,102200
2. 大庆石油勘探开发研究院 |
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| 基金项目： | 中国石油天然气集团公司“九五”重点基础科研项目 |
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| 摘 要： | 松辽盆地朝长地区原油的成熟度普遍较低，大多数原油仍保留正烷烃奇偶优势，这主要与半咸水咸水环境中藻类母质生源输入有关。长２０井的原油既具有正烷烃奇偶优势，又具有较低甾萜烷异构体比值，属于典型的低熟原油。从长２０井低熟原油中检测到了一定量的２８，３０二降藿烷，这说明源岩形成于极度厌氧的环境。此外，在原油中还发现了藿１７（２１）烯系列，这进一步揭示了原油的低熟性。其它原油虽具有正构烷烃的奇偶优势，但甾萜烷参数均比较高，可能为低熟油与成熟油的混合作用所致。
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| 关 键 词： | 松辽盆地 低成熟油 地球化学特征 甾烷 萜烷 |
GEOCHEMICAL CHARACTERISTICS OF CRUDE OILS IN CHAOCHANG REGION |
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| Hou,Dujie.GEOCHEMICAL CHARACTERISTICS OF CRUDE OILS IN CHAOCHANG REGION[J].Journal of China University of Petroleum,1999(2). |
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| Authors: | Hou Dujie |
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| Institution: | Beijing: 102200 |
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| Abstract: | The maturity of Chaochang region in Songliao
basin is lower, and most of oils still keep odd even predominance of n alkanes. The main
source input of oils is algae in brackish saline environment. The crude oils of Chang 20 belong
to typical immature oil which have odd even predominance and lower ratios of sterane and
terpane maturity index. Existence of 28, 30 bisnorhopane in immature oils indicates the highly
anoxic environment of source rocks. In addition, the hop 17(21) ene series in immature oils
verified the lower maturity characteristics of immature oil. Other oils have relatively lower CPI
and high sterane and terpane maturity indexes, which may related to the mixing of immature oil
and mature oil. |
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| Keywords: | Songliao Basin low maturation oil geochemical characteristics sterane terpane |
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