二连盆地坡折带的控相与控藏

在二连裂谷盆地群各个凹陷中，广泛发育不同类型的坡折带。按照成因可划分为断裂坡折、挠曲坡折、侵蚀坡折和沉积坡折4 种类型；按照形成的时间又可分为先生坡折、同生坡折和后生坡折3 种类型。其中，先生坡折和同生坡折具有控层、控相和控砂的作用。在横向上不同类型的坡折组合形成不同类型的坡折带样式，在纵向上不同类型的坡折常发生转化，从而造成不同类型油气藏在空间上的复式叠合连片分布。坡折带是含油气盆地中油气成藏的重要控制因素。因此，在勘探研究中，要特别重视对不同类型坡折带的识别，精细分析坡折带的控层、控相、控砂和控藏，指导油气勘探。

Effect of slope break belt on facies and reservoirs in Erlian Basin

Various slope break belts are widely developed in Erlian rifted basin. According to the genesis, they can be divided into four types, including faulted, flexural, erosional and depositional slope break. They can also be classified into antecedent, syngenetic and epigenetic slope break according to their formation time. Among them, antecedent and syngenetic slope breaks have control effect on layers, facies and sandstones. Different types of slope breaks form various styles of slope break belts laterally and experience transformation vertically. And consequently, different types of hydrocarbon reservoirs are spatiallydistributed in a complexpattern. Slope break belt is one key factor for the formation of hydrocarbon reservoirs. Therefore, different slope break belts should be especially distinguished. In addition, it is necessary to analyze their control effect on layers, facies, sandstones and reservoirs, so as to provide instruction for hydrocarbon exploration.