摘要
准噶尔盆地春风油田稠油油藏的生物标志化合物普遍降解严重,导致该区的稠油油源对比成为难点。通过试验手段分析稠油储层中包裹体的主成分,将其与稠油储层游离烃生物标志化合物特征对比,结合碳同位素分析,确定春风油田稠油主要来源于昌吉凹陷二叠系风城组或下乌尔禾组,油气在聚集成藏前就已经遭受了轻微的生物降解作用,成藏之后继续遭受降解,部分井区还存在后期充注现象。
The degradation of biomarker compound was serious in the heavy oil reservoirs of Chunfeng Oilfield in Junggar Basin,which resulted in difficulty in oil-source correlation.Experimental methods were deployed to analyze the composition of inclusions of heavy oil reservoirs,it was compared with biomarker compound of free hydrocarbon in heavyoil reservoirs.In combination with the analysis of carbon isotope,it shows that the heavy oil is mainly from the Fengcheng or Low Urho Formations of Permian in Changji Depression.Hydrocarbon experiences a slight biodegradation before the oil and gas accumulation,which continues to experience degradation after accumulation,and there exists later filling phenomenon in some areas.
出处
《石油天然气学报》
CAS
CSCD
2013年第4期27-30,164-165,共4页
Journal of Oil and Gas Technology
基金
国家科技重大专项(2011ZX05002-002
2011ZX05002-006)
关键词
包裹体
春风油田
稠油
油源对比
fluid inclusion
Chunfeng Oilfield
heavy oil
oil-source correlation
