摘要
根据原油和烃源岩饱和烃、芳香烃的色谱-质谱分析,原油和油砂抽提物的咔唑类含氮化合物分布特征,结合砂体展布探讨了鄂尔多斯盆地镇北地区长81小层原油来源和石油运移方向。结果表明,镇北地区长81小层原油均来自于长73小层烃源岩,特点是三环萜烷以C23为主峰呈正态分布,缺失伽马蜡烷,孕甾烷发育,重排甾烷丰度低。原油在成熟度上有所差异,靠近深湖区的原油成熟度较高;原油和油砂抽提物的咔唑类含氮化合物有一定的运移分馏效应,石油从生烃中心沿砂体向西南方向运移。
According to analysis of saturated hydrocarbon and aromatics hydrocarbon of crude oil and source rocks by using gas chromatography-mass spectrometry(GC/MS), the distribution characters of extractive carbazole nitrogen compounds in crude oil and oil sands was also discussed in combination with sand body distribution, the source of crude oil and oil migration direction of Formation Chang 81 in Zhenbei Area of Ordos Basin was discussed. It is shown that crude oil of Chang 81 is from source rocks of Formation Chang 7, whose characteristics are that the main peak C23 of tricyclic terpanes presents normal distribution, missing gammacerane distribution, developing pregnane and low abundance of diasterane. The maturity of crude oil is different and has higher maturity around the area of deep lakes. The extractive carbazole nitrogen compounds in crude oil and oil sands have a certain degree of migration and fractionation effects. Oil migrates from the hydrocarbon-generating center to the southwest along the sand bodies.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2009年第2期35-40,共6页
Journal of Oil and Gas Technology
关键词
鄂尔多斯盆地
镇北地区
油源对比
石油运移
Ordos Basin
Zhenbei Area
oil-source rock
correlation oil migration
