石油实验地质2016，Vol.38Issue(2)：244-250,7.DOI:10.11781/sysydz201602244
塔河油田西北部于奇西1井奥陶系中-轻质原油地化特征及成因探讨
Geochemical characteristics and genetic analysis of Ordovician medium-light oils from well YQX1 in the northwest of Tahe Oil Field
摘要
Abstract
Medium-light oils were tested in well YQX1 in the Ordovician super heavy oil area in the northwest of Tahe Oil Field. We studied their geochemical characteristics including physical character, group composition, GC-MS of saturated and aromatic hydrocarbons, and made a comparison with the Ordovician super heavy oils in the Yuqi area and the condensate oils in the Yakela area, in order to confirm their genetic types. The medium-light oils from well YQX1 have a high saturate hydrocarbon content, medium aromatic hydrocarbon content, and low non⁃hydrocarbon and asphaltene contents. The n⁃alkane series is complete with a single mode. An obvious“UCM” hump appears in chromatogram. The distributions of steranes and terpanes has a good correlation with the super heavy oils of Yuqi area and the condensate oils of Yakela area, which indicates that they have the same source. Maturity parameters such as Ts/( Ts+Tm) and 4-/1-MDBT show that oils from well YQX1 have a high maturity, which is similar to the condensate oils in Yakela and higher than the super heavy oils of the Yuqi area. Combined with terminal accumulation background and tectonic evolution in the northwest of Tahe Oil Field, it is inferred that the oils from well YQX1 mainly came from the north. The high⁃maturity light oil and gas migrated along the Luntai fault during the Himalayan period, transformed the early heavy oil reservoirs along unconformity from north to south, and finally formed the medium-light oil currently present in the reservoir.关键词
生物标志物/地球化学特征/成藏模式/于奇西1井/奥陶系/塔河油田Key words
biomarker/geochemical characteristics/accumulation model/well YQX1/Ordovician/Tahe Oil Field分类
能源科技引用本文复制引用
罗明霞,夏永涛,邵小明,刘永立..塔河油田西北部于奇西1井奥陶系中-轻质原油地化特征及成因探讨[J].石油实验地质,2016,38(2):244-250,7.基金项目
国家重点基础研究发展计划（973计划）项目（2012CB214806）和“十三五”国家科技重大专项（2016ZX05005－002）资助。 （）
