The stratigraphic positions of the berwath, unayzah and khuff formations in subsurface saudi arabia are shown. The lower permian unayzah formation is the principal prekhuff hydrocarbon reservoir in the southern ghawar area, where it contains both oil and gas. Bimodal pore size behavior of the shajara formation reservoirs of. Pdf facies in the unayzah formation and the basal khuff clastics. Sequence stratigraphy of the unayzah reservoir in central saudi arabia.
Aeolian and fluvial depositional systems discrimination in. Pdf biogenic silica microfossils in sediments of the. Pdf facies in the unayzah formation and the basal khuff. Pdf in well st8, nafud basin in saudi arabia, the preunayzah unconformity so called hercynian. In contrast, formation water from the upper carboniferouslower permian unayzah group shows a heterogeneous trend between low salinitylow. Heavy mineral stratigraphy of the unayzah formation and basal khuff clastics carboniferous to. Six oil and gas fields have been discovered in permian strata in. Stratigraphic trap in the permian unayzah formation, central saudi. Pdf the permiantriassic khuff formation crops out in central saudi arabia along a ns belt, some 1,200 km in length. The permian unayzah reservoir, saudi arabia article pdf available in arabian journal for science and engineering 391. Origin of formation water from the unayzah and khuff petroleum reservoirs, saudi arabia. The majority of reserves are contained within the unayzah formation. The unayzah formation in the saudi arabian subsurface varies considerably, ranging from zero to hundreds of feet in thickness, and has been subdivided. Pdf sequence stratigraphy of the unayzah reservoir in.
Subsurface stratigraphy, depositional history, and reservoir. The core consists of about 202 ft of the unayzah formation, 74 ft of the basal khuff clastics and 28 ft of the khuff formation. The unayzah formation is a complex succession of continental clastics consisting of braidplain and eolian sands and floodplain silts. The unayzah formation exposed on the southwestern margin of the arabian plate presents an example of the glacial and postglacial facies deposited on the passive continental margin above the.
Facies in the unayzah formation and the basal khuff. The key factors controlling hydrocarbon accumulation in the unayzah formation are migration pathways and reservoir petrophysics. Stratigraphic trap in the permian unayzah formation. The sandstones of the permocarboniferous shajara formation form the main part of the unayzah reservoir in the greater arabian basin. Heavy mineral stratigraphy of the unayzah formation and basal. Pdf the permiantriassic khuff formation of central. Main controls on hydrocarbon accumulation in the paleozoic in. Unayzah formation, at a level equivalent to the base of the upper gharif member of oman.
The unayzah formation is widespread in the greater arabian basin. Pdf glacial and postglacial deposits of the unayzah. The unayzah formation rests unconformably on the qusaiba shale of lower silurian age and is overlain by the late permian khuff formation. This is the first reporting of the unayzah formation from a northern kuwait deep well where a 304 ft of core was cut in the upper part of the formation. Origin of formation water from the unayzah and khuff petroleum. By identifying lateral and vertical changes in sand provenance, heavy mineral analysis provides an important additional tool in the stratigraphic analysis of the permian sandstone succession of saudi arabia, both at the. The unayzah formation is interpreted in the interval 14,82014,660 ft 160 ft, 49 m thick, and is barren. Heavy mineral stratigraphy of the unayzah formation and.
Issc vessel certificate format pdf pages 3 size 537. Ism vessel certificate format pdf pages 2 size 365. Pdf preunayzah unconformity, saudi arabia researchgate. Download fulltext pdf illitization of smectite in sandstones. Download pdf 538 kb abstract the objective of tills study is to discriminate between aeolian and fluvial deposits of the permian unayzah formation in central saudi arabia by using wireline logs. Structural crosssection shows the updip pinchout of the upper unayzah sandstone. Reservoir quality of the unayzah formation in waqr, tinat, and haradh fields by aamir siddiqui download pdf 6 mb. Pdf this is the first reporting of the unayzah formation from a northern kuwait deep well where a 304 ft of core was. Download fulltext pdf download fulltext pdf facies in the unayzah formation and the basal khuff clastics in subsurface, northern kuwait article pdf available in geoarabia manama 4. Pdf chemostratigraphy as a correlation tool for the.