الفهرس | Only 14 pages are availabe for public view |
Abstract The present work aims to shed light on the hydrocarbons occurrences in the Beni Suef basin of Egypt through a comprehensive analysis of its petroleum system elements. A complete set of different type of data was used and interpreted in order to conduct basin analysis in the form of basin delineation was done apart from the analysis of hydrocarbon geochemistry, basin evolution and the geological history. The Beni Suef basin has an oval shape trending NW-SE occupying an area about 1.7 million acres (i.e. 7000 Km2) and is divided into two parts. The West of Nile (WON) part is an unstable shelf of the deep basement and thick-skinned faulting. In comparison, the East of the Nile (EON) segment has rough basement structures, and this Albian basin is filled variedly from the fluvial-lacustrine, fluvial to Cenomanian shallow marine basinal and Turonian deltaic sediments. Afterward, a major Paleocene-Eocene transgression resulted in an open marine carbonate section covered by a blanket of Oligocene marine shale. The structural interpretation including seismic picking of basement event across the basin through seismic sections shows that the basin underwent multiple tectonic regimes. In a primary phase, the Early Cretaceous rifting took place through which The Kharita Formation deposited. The Late Cretaceous phase was dominated by quiet conditions with the deposition of Abu Roash Formation, which was followed by a structural rejuvenation in Paleocene-Eocene period during which Khoman, IV and Apollonia’s Formations got deposited, and thus, this basin is considered a syn- and post-rift basin. Basin modeling and geochemical analysis were applied on the cut samples in the basin and two types of source rock were detected; one with clastic-rich terrigenous organic matter (4.8 wt% TOC) yielding a type III Kerogen (The lower Kharita), and the other one, Abu Roash F carbonate of marine organic matter (2.46 wt% TOC), yielding a type II Kerogen. Two critical moments were recorded in the Beni-Suef Basin: one for L. The Kharita shale at Turonian time and the other for Abu Roash F carbonate at Paleocene time. Dozens of dry holes were drilled in The Beni Suef basin with numerous causes of failure varying from problematic acquisition of data and abnormal environment of data acquisition, low quality seismic data, old drilling techniques and bad hole conditions well logging, improper manual petrophysical evaluation, absence of source rock and missing petroleum system theory, missing migration pathway, barren trap, timing between migration and entrapment, reservoir faulted out, and non-economic volume of hydrocarbon. |