الفهرس 
General Geological SettingOnly 14 pages are availabe for public view
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Abstract
Interpretation of Beni-Suef basin implicates main principles as follows; review of data on composite displays and movies, horizon identification at wells, assessment of data phase and polarity, and recognition of major faults on widely- spaced vertical sections. Fault framework by trying together with horizontal sections, initial horizons control using vertical sections, automatic spatial tracking to complete horizons on every point, revision of horizons and faults, and return of autotracking.
Final time structural maps and horizon slices with chosen amounts of gridding or smoothing, isochron, isopach and depth maps Understand the phase of data before embarking on the mainstream interpretation, use horizontal sections to full advantage; benefit from the efficiency of strike, use of intermediate horizon products to full advantage for refining the interpretation, and finally don’t smooth any map or map- style product until the degree of smoothing required can be judged intelligently, and engage in stratigraphic and reservoir studies in order to get the most output of the data. Detailed stratigraphic and reservoir studies.
The study area is located at about 120 km S/SW of Cairo, at Longitudes 30ᵒ
30’ - 31ᵒ 30’ E and Latitudes 29ᵒ 30’ - 28ᵒ 30’ N, while the terrain varied from flat easy portions to difficult mountainous areas on the western side of the prospect. It comprised a mix of agricultural and urban developments with the entire associated infrastructure, as well as areas of desert with rolling hills and jebel outcrops.
The main target of the study is to know well the subsurface geological structures in Beni Suef basin through seismic interpretation of these structures in the study area to get new prospects in that area and increase the production of the already producing prospects.
Beni-Suef basin is a rift basin bounded to the north and south by two east- west right-lateral shears and from the east and west by northwest trending normal faults. It was formed during the Albian, reached the maximum subsidence in the Late Cretaceous (Maastrichtian) and was subsequently inverted tectonically during the Paleocene-Eocene. It seems to be a continuous basin with a major uplift along its center, which divided it into smaller ones, whose structural pattern is dominated by NE-SW oriented faults, coupled with a strong pattern of NW–SE conjugate faults.
These fault patterns suggest regional wrench movements; this in turn subdivided the basin into several structural units of varying importance. A characteristic feature of many faults is their upward decreasing dip, which attributed to reactivation in the subsurface.
The stratigraphic column in the Beni-Suef area is thick and includes most of the sedimentary succession from Recent to Pre-Cambrian basement complex, despite some anomalies, increases progressively to the North-north east from about (6000 ft.) in the southern reaches, to an estimated (25,000 ft.) of section along the coastal plain. It is believed that, the hydrocarbons were generated in the basin from source beds within the Lower Kharita shales, in addition to A/R “F” carbonates; which subsequently migrated into different fields, as type Ш source rocks during Campanian
/ Maestrichtian times. Hydrocarbons then migrated to the traps through the Middle Tertiary, expulsion also took place in the Late Eocene and continued into the Miocene, where gentle uplift inhibited or prohibited expulsion through the remaining Tertiary and Quaternary, in which the type II source rocks of A/R “F” Member reached maturity level in the Late Tertiary.
Through the available 2D seismic lines that were processed from any noises to get the most appropriate seismic velocity value of the subsurface layers. Also the available Petrophysical Geological and Geochemical reports of the study area were studied. A detailed subsurface structural interpretation was done to get the biggest hydrocarbon accumulation of the subsurface structures to achieve maximum hydrocarbon production.
Three main levels of faulting can be recognized: 1. Latest Jurassic-Neocomian to Late Aptian (E-W and NE-SE); 2. Cenomanian-Turonian to Early Senonian “intra- Khoman” (E-W and N-S), along the basin margins; 3. faults extending to the top of Maastrichtian resp.(NW-SE) and Eocene limestones. Ridges and horsts display extensive Late Senonian-Eocene erosion. The major folds owe their origin to compressional movements, which affected the area during the Late Cretaceous-Early Tertiary tectonic events. These folds are aligned in a general NE– SW trend (Syrian arc system) and plunge down to the southwest. The Syrian arc system folds are severely fractured and faulted, the main fracturing is in the NW-SE direction, but some faults have axes running parallel to the axes of the structures themselves (NE-
SW). In addition, there are other folds, which owe their origin to normal or horizontally displaced faults, these folds are usually confined to fault blocks, with folding axes parallel, oblique or perpendicular to the fault block trend.
Normally, more than one interpretation fits the observable data, each with different implications for petroleum plays. Although every attempt was made to minimize errors, it is perhaps inevitable that, errors were made and not detected. In this regard, if the reader should detect such errors, the researcher would be greatly indebted, if these brought to his attention, so that they may be subsequently corrected. Similarly, any suggestion in the type and mode of coverage of the materials would be greatly appreciated for future research. Suggestions and comments from those who might use this research for that purpose are certainly welcomed.