辽东湾坳陷SZ36-1油田原油稠化过程分析  

Analysis of Crude Oil Thickening Process in SZ36-1 Oilfield,Liaodong Bay Depression

作　　者：薛子鑫 程付启[1] 牛成民 

机构地区：[1]中国石油大学(华东),山东青岛266580 [2]中国石油大学(北京),北京102249 [3]中海油天津分公司,天津300450

出　　处：《特种油气藏》2017年第6期55-59,共5页Special Oil & Gas Reservoirs

基　　金：中央高校基本科研专项"地层温压演化过程对油气成藏的影响"(15CX02003A);国家重大油气专项"渤海湾盆地深层油气地质与增储方向"(2016ZX05006-007)

摘　　要：为查明SZ36-1构造稠油油藏的形成过程,选取油砂样品,运用直接抽提、残样滴酸再抽提方法分别获得砂岩中不同赋存状态的烃类,并进行饱和烃色谱分析及对比,进而揭示稠油的形成过程。研究结果表明,直接抽提产物中饱和烃呈现严重生物降解特征;而残样滴酸抽提产物中饱和烃正构烷烃相对较完整。分析认为,直接抽提产物反映储层游离烃特征,而残样滴酸再抽提产物反映油气充注时的包裹烃。2次抽提产物的差异说明原油的稠化主要发生在成藏之后。稠化过程的明确对稠油资源量的计算及富集区的预测具有重要意义。For understanding the forming process of heavy oil in the SZ36-1 structure, we selected oil sand sam- ples, utilized the methods of direct extraction and re-extraction by dropping acid to the residual samples individual- ly to obtain hydrocarbons at various occurrence states in sandstones. Moreover, by chromatographic analysis and comparison of saturated hydrocarbons, we revealed the forming process of heavy oil. The study results show that the saturated hydrocarbons in the directly extracted product show strong biodegradation feature, while the saturated hy- drocarbons and normal paraffin hydrocarbons are relatively complete in the re-extraction product by dropping acid to the residual samples. According to our analysis results, the directly extracted product reflects the free hydrocarbon feature in reservoirs, while the re-extraction product by dropping acid to the residual samples reflects the inclusion hydrocarbons during oil and gas charging. The differences between the two types of extraction products indicate that the crude oil thickening mainly occurred after the hydrocarbon accumulation. The confirmation of the thickening process is of great significance for calculating heavy oil resources and predicting heavy oil enriching regions.

关 键 词：稠化过程 对比试验 饱和烃色谱分析 SZ36-1构造 

分 类 号：TE122.2[石油与天然气工程—油气勘探]