叠合盆地多烃源层混源油定量判析——以准噶尔盆地东部彩南油田为例  

Quantification of Mixed Oil Derived from Multiple Source Rocks: a Typical Case Study of the Cainan Oil filed in the East Junggar Basin, Northwest China

作　　者：陈建平 [1] 邓春萍 [2] 梁狄刚 [2] 王绪龙 [3] 宋孚庆 [2] 薛新克 [3] 靳涛 [3] 钟宁宁 [4] 

机构地区：[1]中国石油勘探开发研究院,北京,100083,中国石油天然气集团公司油气地球化学重点实验室,北京,100083,中国矿业大学煤炭资源教育部重点实验室,北京,100083 [2]中国石油勘探开发研究院,北京,100083,中国石油天然气集团公司油气地球化学重点实验室,北京,100083 [3]中国石油天然气股份有限公司新疆油田分公司,新疆,克拉玛依,834000 [4]中国石油天然气集团公司油气地球化学重点实验室,北京,100083,石油大学,北京,102249

出　　处：《地质学报》2004年第2期279-288,共10页Acta Geologica Sinica

基　　金：国家自然科学基金(编号49873001);中国石油天然气股份有限公司项目(编号010109-3)

摘　　要：准噶尔盆地东部地区彩南油田东块原油为二叠系、三叠系和侏罗系烃源岩形成的混合原油。选择典型的二叠系、三叠系、侏罗系原油进行人工三元混合配比模拟实验表明,混合原油的全油碳同位素δ^(13)C值的变化与混入量呈直线关系,而Pr/Ph值、β-胡萝卜烷、甾烷与萜烷等各种生物标志物相对比值参数均呈不同的曲线关系变化。通过人工混合配比实验创建的三角形图版判别验证,彩南油田原油中侏罗系的平均贡献为65％左右,二叠系和三叠系的平均贡献分别为20％和15％左右。按照彩南油田原油全油碳同位素以及各类生物标志物参数的变化范围判别,侏罗系烃源岩的贡献为55％～70％左右,三叠系和二叠系均为10％～30％左右。The crude oil in the Cainan field is a mixture of hydrocarbons of Permian, Triassic and Jurassic source rocks. Artificial mixing of three typical Permian, Triassic and Jurassic oils in the laboratory indicates that the whole-oil carbon isotope ratio δ13 C of the artificially mixed oil samples changes linearly with the mixing proportions, but the Pr/Ph.ratio, (β-carotane/n-C25 ratio, and various biomarker ratios in the mixture change non-linearly. The ternary plate created by the artificial mixing of the three typical oils shows that the average contribution of the Jurassic source rocks is 65% > whereas those of the Triassic and Permian source rocks are around 15% and 20%, respectively. In summary, based on the whole-oil stable carbon isotope ratios and biomarker parameters it can be concluded that the Jurassic source makes a contribution of 55%~70%, while the Triassic and Permian sources each contribute by 10%~30%.

关 键 词：准噶尔盆地 混源油 碳同位素 生物标志物 侏罗系 三叠系 三元配比实验 

分 类 号：P618.13[天文地球—矿床学]