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Register a new userTectono- Seismic study of KD and KA formations in Abo Rabah structure- Al- Daw depression
دراسة تكتونو – سيزمية لتشكيلتي الكوراشينا دولوميت و الكوراشينا أنهدريت في تركيب أبو رباح – حوض الدو
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Aِl-Baath University ورقة بحثية
Publication date
2017
fields
Geology
and research's language is
العربية
Created by
Shamra Editor
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يُعد تركيب أبو رباح أحد أهم التراكيب في حوض الدو، بسبب التعقيد التكتوني الكبير الذي تعرض له خلال التاريخ الجيولوجي، و كونه أحد أهم المناطق المنتجة للغاز في سورية، الأمر الذي يجعل دراسته بالغة الأهمية. تشير الدراسات التي قمنا بها في هذا التركيب أن هناك تفاوتاً كبيرا في سماكة الملح تبعاً للعوامل الترسيبية و التكتونية، مما يؤثر بشكل مباشر على خزان الكوراشينا دولوميت الغازي، و هنا تكمن أهمية هذه الدراسة.
Abo Rabah is one of the most important structures in the Al- Daw basin, because of the great tectonic complexity that has been exposed during the geological history, and being one of the most important gas producing areas in Syria. That explains the importance of its study. Our applied studies indicates that there is significant variation in salt thickness depending on sedimentation and tectonic factors, which directly affects the kurachine dolomite gas reservoir, Here lies the importance of this paper.
References used
Al Abdalla,A.(2008) – Tictonic evalution of Arabian plate in Syria since Mesozoic , PhD thesis. Paris, France. 302p
Cavazza, W., Roure, F., Spakman, Stampfli, G.M. and Ziegler, P.A., eds. (2004a) - The TRANSMED Atlas: The Mediterranean Region form Crust to Mantle: Heidelberg, Springer-Verlag, 141 pp. + CD-ROM
Beydoun,Z.R. (1991) – Arabian plate hydrocarbon geology and potential , a plate tectonic approach. American Association of geology, studies in geology. Geologist Bulletin, v77, pp 173-193
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In this paper, we will shed light on the applied studies results in
special of deep tectonic situation of the Kurachine dolomite
formation through the seismic sections explained by us, and
establish time and depth maps for this formation, and prop
osing a
well that is supposed to be hydrocarbon potential in the light of
modern data.
Sedimentary Formations in Al'Daww Depression has been determined on fossils or strata correlation on upcent of fossils.
We found from geological data processing and analysis of litho logical series to Al'Daww Depression that the important rocks th
at generated oil and gas are belong to Silurian and lower Triassic where as Jurassic sediment does not represent any important, nor upper Cretaceous sediments because its adjacent to surface and invaded by surface water.
Reservoir rocks represented by Markada's Kurashina Dolomite, Butma, Rutba and Judea formations.
The good cover rocks represented by the Tanf, Amanous Shale and Kurrachina Anhydrite 13
as well as the upcent of some cover formations deteriorated the important of some reservoir formations at Al'Daww Depression This study reveal that the subsiding velocity rate to the basin produced the thickness' and made this formations more prospective in general.
Palmira chain is one of the most important structures in the Middle
East. Structurally, It's divided into Northern and southern Palmyras,
and between them AL- Daw basin lies. The importance of the
Palmira chain is related to its way of forming, ev
aluating through
the geologic time, and structures those containing oil and gas.
Therefor this paper takes high importance, because the tectonic
active of regional and local faults systems in the oil reservoirs.
Thus we'll focus on the tectonic situation on the studied region
structures, and its effect on the surface and subsurface rock lyres,
using the seismic profiles data. In conclusion, We'll justificate the
dryness of some drilled wells, and suggesting some directions to
guide the future oil exploring.
Cretaceous formations have been studied in number of wells at Al_Daww depression
by taking /57/ crashed samples for preps of studying their content of fossils of Foraminifers
and Ostracoda, study of Ostracoda reveals their important beside the fora
minifera in
stratigraphic determine and bled up layer correlations. Also, it reveals their important in
locating their sediment environment, wither shallow to medium depth in general but it
became relatively deep at upper Shiranish formation, and it may be concordant with natural
sediment formations studied. Layers correlation reveals’ increase formations thickness and
depth from north east toward North West that make more hope for oil in this directions.
This research aims to study the sedimentary and palaeogeographic
evolution of the Kurachina Dolomite Formation along Palmyrian belt zone.
Studying this formation in its Northern and Southern parts has shown that it
consists of two lithostratigraph
ic members, where each of them includes a
series of lithological units. The petrological study of the components of these
units shows that they are composed of four distinguished facies: Dolomitic
limestones, clayey limestones, clays and anhydrites, pure or mixed, and
deposited in repeated harmonic layers, gathered mostly in neutral sedimentary
sequences. Dolomitic limestones are the most common and important facies,
they are composed of micrite muds which have been subjected, in different
degrees to synsedimentary or late dolomitisation processes through pumping or
burial mechanisms. Dolomitisation intensity decreases downward the formation
and increases laterally from the south to the north of the Palmyrian chain.
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