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Register a new userEvaluation of oil importantes formations at Al'Daww Depression in Syria
تقييم التشكيلات الجيولوجية الهامة نفطيا في حوض الدو- سورية
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محمد اسماعيل( باحث )
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حددت التشكيلات الرسوبية في حوض الدو اعتمادا على المستحاثات أو بالمضاهاة الطبقية في حال غياب المستحاثات. تبين نتيجة معاملة المعطيات الجيولوجية لحوض الدو وتحليل المتتاليات الليتولوجية فيه، أن أهم الصخور المولدة للنفط والغاز تابعة للسيلوري والترياسي الأسفل بينما لا تمثل رسوبيات الجوراسي أهمية توليدية, أما رسوبيات الكريتاسي الأعلى فليس لها أهمية توليدية لقربها من السطح واجتياحها من قبل المياه السطحية. تتمثل الصخور الخازنة بتشكيلات مرقدة، كوراشينا دولوميت ، بوطما ، رطبة وجديا . تمثل تشكيلات التنف، أمانوس شيل، وكوراشينا أنهدريت صخورا غطائية جيدة للصخور الخازنة في حوض الدو، كما أن غياب بعض التشكيلات الغطائية يقلل من أهمية بعض التشكيلا ت الخزنية في الحوض. أكدت هذه الدراسة أن سرعة معدل الهبوط التدريجي للحوض أدى لزيادة سماكة التشكيلات ومن ثم زيادة مأموليتها بشكل عام.
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 that 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.
References used
Al-Otri, M. and H. Ayed 1999. Evaluation of hydrocarbon potentials of the sedimentary basins in Syria. Evaluation of hydrocarbon potential in Arab sedimentary basins, Ruiel - Malmaison, France
Al-Saad,D.k Sawaf,T., Gwbran,A., Barazangi, M., Best,J., and Chaimov,T.,A., Crustal structure of central Syria: The intracontinental Palmyride Mountain belt, Tectonophysics, 207, (1992):345-358
AYED, HASSAN (1998): The Geochimical Report for Tyas-1 Well
Barazangi and I. Bach-Imam 2001. Mesozoic stratigraphy and geologic development of Syria. for submission to GeoArabia
Best, J. A., Barazangi, M., Al-Saad, D., Sawaf, T. & Gebran, A. (1993): Continental Margin Evolution of the Northern Arabian Platform in Syria, AAPG Bulletin, 77, 2, 173-193
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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 t
he
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.
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.
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.
Seventh sector is located on the right bank of the Euphrates River at the town of Abu-
Kamal, the Syrian-Iraq border, and its square 18140 hectares. Invest most heavily sector
too, where crops depend on irrigation, irrigation networks mediated cons
isting of earthen
trenches, canals and to pump water by pumps on the banks of the Euphrates.
Research aims to assess the pedelogical properties of agricultural soils by using laboratory
and field tests: leaching speed, permeability, density, porosity, water field capacity, natural
humidity (hygroscopic– wilt limit), so as to contribute in choosing optimal modalities for
irrigation and drainage, and rehabilitation Land affected by salinity and exited the
investment.
The soils of the sector are clay, clayey sand, fine sand, and it has low permeability, low
water field capacity because of sedimentary origin, and the total porosity is low in the
upper part of subsurface soil because of its impaction. There is a relationship between
hygroscopic moisture of soils and its structural composition. The search recommend to
agriculture Fabaceae crops with different roots deep to help improve soil building, and
need to use spray irrigation method to control the water quantity and wetting depth.
The Seventh sector is located on the right bank of the Euphrates River at the town of ALbu- Kamal, the Syrian-Iraq border. Invest most heavily sector too, by planting different crops which irrigated by irrigation networks consisting of canals and ear
then trenches. Research aims to evaluate the salinity of agricultural soils and unconfined groundwater by doing field surveying of agricultural soils of horizons from ground surface till depth 200cm. and making detailed chemical analysis of free groundwater and evaluate the quality of it to determine the salinity regions and the salinity degree. The salinity of agricultural soils of the sector are sulfate-chlorine and little degree chlorine - sulfate and chlorine classified non salinity –little salinity and little degree moderate salinity to very highly and highly salinity. The salinity of free groundwater between 1.3-28.5 g/l. and classified chlorine sulfate-magnesia calcic and sometimes sulfate chlorine- calcic magnesia. The research recommend to study and determine the leachingrequirement of salinity regions from actual test or choosing the most appropriate experimental equations.
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