微量元素在混源油类型划分及油源对比中的应用  

Application of trace elements in mixed-oils classification and oil-source correlation

作　　者：陈哲龙 柳广弟[1] 王绪龙 任江玲 高岗[1] 马万云 高平[4] CHEN Zhelong;LIU Guangdi;WANG Xulong;REN Jiangling;GAO Gang;MA Wanyun;GAO Ping(State Key Laboratory of Petroleum Resources and Prospecting in China University of Petroleum, Beijing 102249, China;;Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;;Research Institute of Experiment and Testing, PetroChina Xinjiang Oilfield Company, Karamay 843000, China;Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083, China)

机构地区：[1]中国石油大学油气资源与探测国家重点实验室,北京102249 [2]中国石油勘探开发研究院,北京100083 [3]中国石油新疆油田分公司实验检测研究院,新疆克拉玛依834000 [4]中国石化石油勘探开发研究院,北京100083

出　　处：《中国石油大学学报（自然科学版）》2017年第6期50-63,共14页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家科技重大专项(2017ZX05001-004);中国石油新疆油田分公司课题(2014-C4023)

摘　　要：采用微量元素分析三叠系百口泉组和二叠系原油及烃源岩抽提物样品,利用V、Ni、Co、Mo等微量元素含量及其比值将准噶尔盆地玛湖凹陷原油划分为三类单源油(A1、A2、B)和两类混源油(C1、C2),分析烃源岩抽提物微量元素分布特征,建立混源油微量元素识别图版。结果表明:原油中普遍富集V、Cr、Ni、Cu、Mo等过渡金属元素,稀土元素(REE)含量则普遍较低;V/Ni、Co/Ni、Cr/Mo(元素含量比值)等可以作为油源对比的有效指标,A1类原油来源于风城组碳酸盐岩源岩,A2类来源于风城组泥岩类,B类则主要来源于乌尔禾组源岩,C1类为A1及B类混源,C2类为A2及B类混源;该划分方法进一步证明微量元素可以作为复杂高熟条件下原油类型划分及油源对比的有效工具。The trace elements in crude oils from Triassic Baikouquan formation,Permian and bitumens of Permian source rocks inMahu sag in Junggar Basin have been analyzed.And on the basis of the contents and ratios of trace metals,like V,Cr,Ni andMo,etc,the oils have been classified into three single-sourced oils(A1,A2and B)and two groups of mixed oils(C1and C2).Trace elements distribution of source rock bitumens were investigated,then the recognition chart of distinguishing mixed oils hasbeen established.It is found that the transition metals like V,Cr,Cu,Mo are enriched in crude oils and the contents of rare earthelements(REE)are very low.The ratios of V/Ni,Co/Ni and Cr/Mo can be effective index for oil-source correlations.And A1oils are mainly from P1f carbonate source rocks,while A2oils are from P1f mudstones,and B oils are from P2w mudstones.C1arethe mixtures of A1and B,while C2are the mixtures of A2and B.This classification method has proven that the trace elements canbe effective tools for high-maturity oil classification and oil-source correlations in complex geological conditions.

关 键 词：微量元素 混源油 油源对比 百口泉组 玛湖凹陷 准噶尔盆地 

分 类 号：TE122.14[石油与天然气工程—油气勘探]