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首页> 外文期刊>Arabian journal of geosciences >Sequence stratigraphic evolution of the syn-rift Early Cretaceous sediments, West Beni Suef Basin, the Western Desert of Egypt with remarks on its hydrocarbon accumulations
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Sequence stratigraphic evolution of the syn-rift Early Cretaceous sediments, West Beni Suef Basin, the Western Desert of Egypt with remarks on its hydrocarbon accumulations

机译：西班牙西班牙沙漠中埃及西班牙沙漠的序列地层演变，埃及西部沙漠累积

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摘要

The Beni Suef Basin is a petroliferous rift basin straddling the River Nile containing a thick Mesozoic-Paleogene succession. The Kharita Formation is formed in the syn-rift phase of the basin formation and is subdivided into the Lower and Upper Kharita members. These two members are regarded as two third-order depositional sequences (DSQ-1 and DSQ-2). The lowstand systems tract (LST-1) of the DSQ-1 is represented by thick amalgamated sandstone bodies deposited by active braided channels. Mid-Albian tectonic subsidence led to a short-lived marine invasion which produced coastal marine and inner-shelf facies belts during an ensuing transgressive systems tract (TST-1). At the end of the mid-Albian, a phase of tectonic uplift gradually rose the continent creating a fall in relative sea level, resulting in deposition of shallow marine and estuarine facies belts during a highstand systems tract (HST-1). During the Late Albian, a new phase of land-rejuvenation commenced, with a prolonged phase of fluvial depositional. Fluvial deposits consisted of belts of amalgamated, vertically aggraded sandstones interpreted as braided and moderately sinuous channels, in the lower part of the Upper Kharita Member lowstand stage (LST-2). The continuous basin filling, coupled with significant lowering in the surrounding highlands changed the drainage regime into a wide belt of meandering river depositing the transgressive stage (TST-2). The history of the Kharita Formation finalized with a Cenomanian marine transgressive phase. Economically, the TST-1 and HST-1 play a significant role as source rocks for hydrocarbon accumulations, whereas LST-2 act as good reservoir rocks in the Early Cretaceous in the Basin.
机译：Beni Suef盆地是一艘乘以跨越河尼罗河的凡士林裂缝盆地，含有厚厚的中生代古雄性连续。 Kharita形成形成在盆地形成的同步阶段，并细分为下喀喇叭成员。这两个成员被视为两个三阶沉积序列（DSQ-1和DSQ-2）。 DSQ-1的低位系统道（LST-1）由厚的粘合砂岩体表示，由主动编织通道沉积。中尔米亚人的构造沉降导致短暂的海洋入侵，在随后的近灾系统道（TST-1）期间生产了沿海海洋和内部搁板的面部皮带。在中间白尔米亚中间的结束时，构造隆起的阶段逐渐上升了大陆，形成了相对海平面的落下，导致浅海洋和河口相框沉积在高处的系统道（HST-1）。在晚斯坦斯晚期期间，新阶段的土地恢复期开始，较长的氟尿沉积阶段。河流沉积物包括胺变化，垂直加深砂岩的皮带，被解释为编织和中等振动通道，在上kharita成员划分阶段（LST-2）的下部。连续盆地填充，周围高地的显着降低改变了排水制度，进入沉积近河流（TST-2）的蜿蜒河流宽带。 Kharita形成的历史最终确定了Cenomanian海洋海洋海洋近期阶段。在经济上，TST-1和HST-1发挥着烃类储层源岩的重要作用，而LST-2作为盆地早期白垩纪的良好水库岩石。

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