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沈家铺油田主力产油层枣Ⅴ油层组被多条断层切割 ,被分为 5个断块 ,每个断块都具有独立的油水系统 ,油水关系复杂 ,储集层流体非均质性强 ,原油具有密度、黏度、胶质与沥青质含量、含硫量都高的“四高”特点。将薄层色谱 火焰离子检测技术(TLC FID)和岩石热解分析 (Rock Eval)相结合 ,对枣Ⅴ油层组密集取样的储集层岩心抽提物进行族组分绝对定量分析 ,研究枣Ⅴ油组储集层流体非均质性分布特征 ,并对其成因进行探讨。研究结果表明 :纵向上随深度增加 ,枣Ⅴ油层组的含油性逐渐变差 ,但原油性质逐渐变好 ,可能是岩性变化和原油充注方向不同导致的 ;横向上 ,从北东向南西 ,枣Ⅴ油层组的原油性质逐渐变好 ,密度、黏度逐渐降低 ,胶质与沥青质含量逐渐减少 ,推测可能与油气运移方向和构造位置有关。图 3表 3参 3
The main reservoir of Shenjiasu oilfield, Zao Ⅴ oil layer, is cut by multiple faults and divided into 5 fault blocks. Each fault block has an independent oil-water system. The relationship between oil and water is complex and the fluid in the reservoir is highly heterogeneous. Crude oil has the density, viscosity, gum and asphaltene content, high sulfur content of the “four high” features. Based on TLC FID and Rock Eval, absolute quantitative analysis of clastic core components in the sampled reservoir core of Jujube V reservoir was carried out. The effects of jujube Ⅴ The fluid heterogeneity distribution characteristics of oil reservoir and its genesis are discussed. The results show that the oil content of Jujube Ⅴ oil layer gradually deteriorates with the increase of depth in vertical direction, but the properties of crude oil gradually get better, which may be caused by the change of lithology and the filling direction of crude oil. In the horizontal direction, , The crude oil properties of Jujube Ⅴ oil layer gradually became better, the density and viscosity decreased, and the content of pectin and asphaltene decreased gradually, suggesting that it might be related to the hydrocarbon migration direction and tectonic position. Figure 3 Table 3 Reference 3