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位于非洲的M盆地为前寒武系基底上发育起来的中、新生代内陆断陷盆地。该盆地主要由EW向和NW向两大构造体系组成 ,前者控制盆地构造的总体发育方向。依据断裂规模 ,控盆作用及形成、活动时间 ,此盆地的断裂可分为 5个级别。与盆地三大演化阶段相匹配 ,盆地内发育 5个期次的断裂构造 ,长期继承性发育的构造带是油气聚集的有利场所 ;后期 (第三、第四纪 )发育的断层对早期油藏有破坏作用 ,后期形成的圈闭不具成藏条件。由于断层发育 ,油气以垂向运移为主 ,发育较早 (AM组沉积前 )的断层具有封闭作用。
The M Basin, located in Africa, is a Meso-Cenozoic inland rift basin developed on the Precambrian basement. The basin is mainly composed of EW and NW two structural systems, the former control the overall development direction of the basin structure. According to the scale of the fault, the role of the control basin and the formation and activity time, the faults in this basin can be divided into five levels. It matches the three major evolution stages of the basin. There are five periods of fault structures developed in the basin. The tectonic belts with long-term succession are favorable sites for oil and gas accumulation. Faults developed in the later period (the third and the fourth quaternary) There is a damaging effect, the traps formed late does not have the conditions of accumulation. Due to the fault development, oil and gas are mainly migrated vertically, and faults with a relatively early development (pre-AM group deposition) have a sealing effect.