辽东湾坳陷SZ36-1油田原油稠化过程分析

发布时间：2018-04-28 07:11

本文选题：稠化过程 + 对比试验　；参考：《特种油气藏》2017年06期

【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。
[Abstract]:In order to find out the formation process of heavy oil reservoir in SZ36-1 structure, oil sand samples were selected, the hydrocarbon in different occurrence states in sandstone were obtained by direct extraction and residual acid extraction, and the saturated hydrocarbon chromatographic analysis and comparison were carried out. Furthermore, the formation process of heavy oil is revealed. The results show that the saturated hydrocarbons in the direct extraction products show serious biodegradation characteristics, while the saturated hydrocarbon n-alkanes in the residual acid extraction products are relatively complete. The analysis shows that the direct extraction products reflect the characteristics of free hydrocarbon in the reservoir, while the residual acid reextraction products reflect the difference of the second extraction products of the encapsulated hydrocarbon during oil and gas filling. It is concluded that the thickening of crude oil mainly takes place after the formation of the reservoir. The determination of thickening process is of great significance to the calculation of heavy oil resources and the prediction of rich areas.
【作者单位】：中国石油大学(华东);中国石油大学(北京);中海油天津分公司;
【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)
【分类号】：P618.13

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