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Register a new userPetrology and Diagenesis Study of Rutbah Formation in Omar fields in Euphrates graben
دراسة بترولوجية و دياجينيزية لتشكيلة الرطبة في حقول العمر في منخفض الفرات
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تشكيلة الرطبة العائدة للكريتاسي الأعلى هي إحدى التشكيلات الرئيسة المكونة للعمود الطبقي في منخفض الفرات. و تعود أهمية هذه التشكيلة إلى كونها تشكل الخزان النفطي الرئيس في مختلف حقول المنخفض المنتجة للزيت و الغاز الطبيعي. ارتكزت دراسة هذه تشكيلة في هذا البحث على تحليل المعطيات الجيولوجية التحت سطحية المتمثلة باللباب الصخري و القياسات الجيوفيزيائية البئرية, و نتائج التحاليل الكيميائية المخبرية.
Al Rutba Formation , bellowing to the upper Cretaceous, is one the main formation of the stratigraphical coumn of Euphrate Depression. It is importance becomes from that it can statute the principle petroleum reservoir in high member of the depression fields. Producing oil and the natural gas. The importance of this group is to be the main reservoir of oil in various fields of low oil producing natural gas. The present study is based on subsurface geological data, presented by cores, well logs and chemical results of the analyses laboratory.
References used
Al-ASSIMI, A. 2007- Petroleum and Gas in Syria-future perspective. First Geological Congress of Syria, 5-8 May 2007, Damascus University, Syria
ALLEN, P. A, ALLEN, J.R. 1990 - Basin analysis principle & Applications. Oxford, London, Boston. 549p
ALSHARHAN, A. S. and NAIRN, A. E. M, 1997 - Sedimentary Basins and Petroleum Geology of the Middle East. Elsevier Science B.V. Amsterdam. 943p
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The various faults that hit the Tanak area were identified by
studying the seismic sections in several directions and with specific
exclusions, and intensifying those exclusions to increase their
accuracy of clarity by using the most appropriate t
ypes of seismic
attribute maps for the 3D survey (Edge Enhancement map -
Artificial Illumination map - Azimuth map - Dip map - Seismic
Amplitude map - Polarity map - Frequency map) for accurate check
of these faults and cracks in the studied area especially for Al-
Rutbah formation. We found helpful and supportive indicators in
order to determine its optimal location by applying previous
seismic maps on its seismic surface. These maps were compared
with each other after being exported to the Petrel program besides
the time map of the study area. As a result, the fault boundaries
were determined as accurately as possible by using the programs:
(Geoframe - Petrel -Word).
The correct study of the reservoir leads us to develop drilling
programs suitable for producing stratum.
In addition, this makes us do successful operations to achieve the
best recover factor ,within the convenient time and at the lowest
appropri
ate cost. This study will help us to avoid or solve many of
the problems associated with the production processes and the
most important problem of rehydration .In this research I did a
geological and reservoir study of the Jido Field which is one of
the fields of the Euphrates Company and it is located within the
area of graben Euphrates in Deir Azure to the east of Syria,
where recoverable reserves which are estimated in this field is
about 83 million barrels. The objective of the study was to know
the specifications and behavior of the reservoir and fluid inside
and the possibility of a Hydrodynamic connection between blocks
,where this information is taken into account when calculating
recoverable reserves and the assign of technological indicators for
investment.
Shiranish formation in Sazaba Oil fields region had been divided by
Petrology study and well Logs measurements to three major members (lower –
middle – upper). Then these members have been divided to lithostratigraphic
units and subunits. This stu
dy showed that the lower member is formed of
clayey - limestone rocks rich in planktonic foraminifera and glaconitic sand.
The middle member consists of organic limestone facies, dolomitic-limestone,
sometimes clayey - limestone rocks with crystals of pyrite and glaconitic sand.
Organic- limestone rocks and detrital limestone are predominant in the upper
member interbeded by dolomitic-limestone and rare clayey – limestone. This
facies contains pelagic and planktonic foraminifera.
The role of diagenes phenomenon is evident on Shiranish’s facies through:
dolomitization according to burial and miksing processes. It is also clear
through chemical compaction, mechanical compaction, cemenation,
micretisation and silisification.
The Kamshoka formation in Al-Rasafa basin is the second reservoir , because it has
a petroleum importance, where these formation have not petrol in Syria exception in Al-
Rasafa basin, where the fracture calk rock , and dolomite contain a good amou
nt of hairdo
carbonate, so it gave the importance of. Theaim of these research is to do petro logical,
and geneses analyses ofKamshoka formation, and to estimate the storage characters , and
define characters , and kinds and porosity of fracture calk rock , and dolomite, and to
have conclusion about the conditions, and environments of sedimentation, and the stages
of sedimentation development for the all area. The Kamshoka formation showed a good
productivity in some holes which was drilled brand-new, and it gives a hopes to new
discovering in another areas in Syria .
Due to the extensive and rapid processing of the Petrel program, we
have relied on it to construct a three-dimensional geological model of
the petrophysical properties of porosity, permeability, amount of
saturation of hydrocarbons, GRV (Gross Roc
k Volume), N/G, Bo, In
addition to determining the oil – water contact levels For the studied
area (Sabban field, - Ruttba and Malussa Formations) in order to
calculate the oil reserve in a specific way and compare it with
previous studies in order to deepen the oil understanding of the region
and identify potential drilling opportunities.
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