地质学报2018，Vol.92Issue(1)：154-169,16.
榆树林油田扶杨油层沉积岩地球化学特征及地质意义
Geochemical Characteristic of Sedimentary Rocks in the Fuyang Oil Layer of Yushulin Oil Field and Its Geological Significance
摘要
Abstract
The study conducted geochemical analyses of mudstone,siltstone and sandstone samples from the Yushulin Oilfield,Sanzhao sag.The results show that the most of major elements have moderate contents.Compared with the average of upper continent crust (UCC),the samples have lower Fe2O3,MgO,CaO and Na2O,but slightly higher TiO2,Al2O3,K2O,MnO.The contents of compatible elements (V,Cr,Co and Ni) in the samples are lower than PAAS (Post Archean Australian shale) and UCC,and the total amount of REEs ranges from 102×10-6 to 276×10-6 with an average of 188×10-6.The similar chondrite-normalized REE pattern with PAAS suggests that they have similar provenance and tectonic settings.The Pearson correlation of some elements shows that most elements are negatively related to SiO2 but positive to Al2O3,indicating that most elements are affected by clay minerals because quartz and feldspar exert a dilution effect on these elements.Based on the provenance discrimination diagram of major elements,Th-Hf-Co plot,and La/Hf and (Gd/Yb)N,it can be concluded that the provenance of studied area mainly derived from felsic-predominant rocks,probably involved in some recycle sedimentary rocks.A series of tectonic discrimination diagrams suggests that the Fuyang oil layers deposited in a continent island arc setting.Pale-climate analysis of oil sub-layers shows that FI sub layer deposited in a strong tectonic activity settings and drought climate and is of better reservoir physical properties.Therefore,this should be the key layers for oil and gas exploration.关键词
扶杨油层/沉积地球化学/构造背景/物源Key words
Fuyang oil layer/sedimentary geochemistry/tectonic setting/provenance引用本文复制引用
施秋华,袁亚娟,夏斌,林舸..榆树林油田扶杨油层沉积岩地球化学特征及地质意义[J].地质学报,2018,92(1):154-169,16.基金项目
本文为国家自然科学基金项目(编号41372208、40534019)资助的成果. （编号41372208、40534019）
