Fula Oilfield in the Fula sag is one of the main petroleum-producing areas in the Muglad basin.The Fula sag suffered three faulted depressions in Early Cretaceous,Late Cretaceous and Tertiary.AG shale formation deposited in the first depressed period is the main hydrocarbon source,and Aradeiba,Bentiu and upper AG Formations are the main oil-bearing series;reverse fault block(nose-type) is the leading trap;the big fault cut into the AG Formation is the main channel for migration vertically;the lateral sealing of shale in Aradeiba Formation is the key control factor in forming the Aradeiba and Bentiu reservoirs;the successively developed palaeohigh in the AG Formation is the favorable hydrocarbon concentration area,the effective lateral and vertical seals by the shale in the upper section of AG are the crucial factors for the AG reservoirs.Aradeiba Formation is a single bedded reservoir;Bentiu Formation is a reservoir with complex oil-water distribution and tilted oil/water interfaces;AG Formation is a layered reservoir with multiple water/oil/gas systems vertically.

苏丹穆格莱德盆地Fula油田主要为较浅的白垩系Aradeiba组、Bentiu组的普通稠油油藏和Abu Gabra组的稀油及天然气藏.主体区块Fula North断块Bentiu组油藏为一垒块上的断背斜块状油藏,具有倾斜的油水界面.Aradeiba组为浅湖沉积的层状薄砂岩的高孔、高渗储层,Bentiu组为辫状河沉积的厚层块状砂岩的高孔、高渗储层, Aradeiba组和Bentiu组油藏埋藏浅,砂岩胶结疏松、物性好、易出砂、地层压力低,原油具有密度大、粘度高、酸值高和油稠等特点.Abu Gabra组的层状油气藏为三角洲前缘沉积砂岩、厚度薄、中孔、中渗、物性差,具有断块小、储层相变快、油气高度低等特点.Abu Gabra组油藏的形成主要受侧向封堵条件、储层的储集性等地质条件控制;有效的生、储、盖组合、泥岩的侧向封堵是Darfur群、Bentiu组油藏最主要的控制因素.