隐蔽圈闭成藏条件组合模式研究

与构造油藏相同,形成隐蔽油藏的基本地质条件主要为生、储、盖、运、圈、保6个方面.在油气成藏的众多条件中,源岩、储层和圈闭是最基本的条件.二连盆地主要发育腾格尔组腾一段和阿尔善组阿四段2套主力烃源岩;阿尔善组阿四段、腾格尔组腾一段和腾二段3套主要储集层以及3套优质盖层.这3个基本成藏条件在不同构造类型的盆地中常形成不同类型的组合模式.二连盆地由于凹陷数量多,类型全,因而生储盖组合模式丰富.根据二连盆地构造、沉积背景的不同,其组合模式可以概括为:①单断型成藏条件组合模式;②构造反转型成藏条件组合模式;③双断型成藏条件组合模式.不同类型的成藏条件组合模式一般具有不同的成藏特点.

Study on the reservoir formation modes of subtle traps

The same as structural pools,the general geological conditions of subtle reservoir forming may include hydrocarbon source rock,reservoir,cap rock,migratoin passage,trap,preservation condition.And among these conditions,the hydrocarbon source rock,reservoir and trap are the most basic conditions.In Erlian Basin develop two sets of main hydrocarbon source rock,three sets of main reservoirs and three sets of cap rock layers.The three basic reservoir formation conditions may form different combination modes in the basins of different structural types.In Erlian Basin,there are many combination modes of the three basic reservoir formation conditions because there are very many number and types of sags,and they are:monotonous fracture type,structure reversal type and double fracture type combination modes of reservoir formation conditions.Generally,different combination modes of reservoir formation conditions have different reservoir formation characteristics.