论文详情
中国不同沉积环境的氮同位素特征
石油与天然气地质
2001年 22卷 第No.3期
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Title
CHARACTERISTICS OF NITROGEN ISOTOPE IN DIFFERENT DEPOSITONAL ENVIRONMENTS IN CHINA
Authors
Chen Chuanping
Mei Bowen
摘要
中国不同沉积环境部分原油和干酪根的氮同位素实验分析结果表明,氮同位素与沉积环境有较好的对应关系:淡水环境原油的δN大致在0.%～0.6%之间;咸水和半咸水环境中形成的沉积有机质氮同位素比值最重,δN普遍在1%以上;而古生代海相碳酸盐岩中有机质及由此生成的原油的δN接近0或小于0.
Abstract
The test results of nitrogen isotopic samples of several crude oils and kerogens in China's different depositional environments suggest that nitrogen isotope is related to depositional environment. The N of oils formed in fresh water environment is about 0.3%～0.6%;the N ratios of deposits in salt and brackish waters are the heaviest,N is generally above 1%;whereas that in Paleozoic marine carbonate rock and the oil from it is below 0 or less than 0.
关键词：
原油;
氮同位素;
硫酸消煮法;
沉积环境;
中国;
Keywords:
crude oil;
nitrogen isotope;
Kjeldahl method;
depositional environment;
China;
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