摘要
穆格莱德盆地福拉凹陷是在中非剪切带剪切应力场背景下形成的以中生代沉积为主的裂谷凹陷,裂陷活动可分为早白垩世、晚白垩世和古近纪3个阶段,主要形成南北和北西-南东走向两组断裂。福拉凹陷构造格局受南北向断裂控制,凹陷内二级构造带的发育主要受北西-南东向断裂控制。福拉凹陷构造对油气藏的控制作用,主要表现在3个方面:构造转换带是油气富集带,多旋回构造沉降形成有利的储盖组合,构造斜坡是油气聚集的有利区。
Fula sag is located in northwestern Muglad basin of Sudan Republic in Central Africa. The rift sag dominated by Mesozoic deposits was formed under the setting of shear stress field in Central African shear belt. Its fault activity can be divided into three phases, namely Early Cretaceous, Late Cretaceous and Paleogene, which form two groups of faults in trends of N-S and NW-SE. The frame of Fula structure is controlled by N-S fault and the growth of second-rank structural belt within this sag by NW-SE fault. It is indicated from the structural controlling effects in Fula sag on its oil-gas reservoirs that the structural trans-zone could be as the hydrocarbon enrichment zone, the multi-cycle structural subsidence may shape the favorable reservoir-caprock assembages and the structural slope could be the favorable area of hydrocarbon accumulation.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2007年第3期387-390,共4页
Xinjiang Petroleum Geology
关键词
苏丹
穆格莱德盆地
中非剪切带
福拉凹陷
构造特征
油气聚集
构造转换带
Sudan
Muglad basin
Central African trans-shear zone, Fula sag, structural feature
hydrocarbon accumulation
structural trans-zone
