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已经发表的烃圈闭分类方案注重于圈闭的形成机理。从类比的角度看,这些分类方案在勘探中具有很大的价值。但是,以极不相同的方式形成的圈闭可以具有相同的圈闭机理(即石油聚集在圈闭中的方式)。本文依据圈闭作用机理,提出一种新的分类方案。单封堵面圈闭(one-sealtraps)系指那些顶部封堵地层的底面具有闭合等值线的圈闭。多封堵面圈闭(poly-sealtraps)系指那些在单个封堵面上(顶邯封堵层的底面)不具有闭合等值线的圈闭。根据封堵面与封堵岩性的关系(例如,整合,不整合,构造或岩相变化)进行二级划分,并根据封堵层序本身进行三级分类。圈闭成败的风险是由封堵面的有效性决定的,它取决于界面的性质和起封堵作用的岩性。
The published hydrocarbon trap classification scheme focuses on the trap formation mechanism. From an analogy perspective, these classification schemes are of great value in exploration. However, traps formed in very different ways can have the same trapping mechanism (ie the way in which oil is trapped in traps). Based on the mechanism of trapping, a new classification scheme is proposed. One-seal traps are traps that have closed contours on the underside of those top-plugged formations. Poly-seal traps are those traps that do not have closed contours on a single plugging surface (the bottom of the top plugging plugging layer). The secondary classification is based on the relationship between the plugged surface and the plugged lithology (eg, integration, unconformity, tectonic or lithofacies changes) and is classified into three levels according to the plugging sequence itself. The risk of trapping success is determined by the effectiveness of the plugging surface, which depends on the nature of the interface and the lithology responsible for plugging.