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Register a new userDetermination Of immovable And Movable Water Saturation Using Geophysical Well Logging
تحديد نسب التشبع بالمياه المرتبطة و القابلة للحركة صن طريق القياسات الجيوفيزيائية البئرية
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أغلقت و هجرت العديد من المكامن النفطية المنتجة حول العالم بسبب عدم التقييم المناسب و الدقيق لها . و كمثال : في بدايات عمليات تفسير معطيات القياسات الجيوفيزيائية، كان السلوك الشائع هو اعتبار الطبقات المشبعة بالماء بنسبة تزيد عن %50 طبقاتٍ غير اقتصادية، لكن و مع التطور الحاصل في القياسات الجيوفيزيائية، فقد تم التوصل إلى أن بعض تلك الطبقات غير المنتجة نظرياً هي في الحقيقة طبقات ذات إنتاجيةٍ عاليةٍ ، و ذلك استناداً إلى توزع الفراغ المسامي و الموائع في التشكيلة و قابلية حركيتها و انتاجها .
many potentially prolific producers have already been plugged and abandoned , owing to lack of adequate formation evaluation . For example , In the early days of log analysis، it was common practice to regard water saturations above 50% as non-commercial. However, with advances in logging and seismic technology came the realization that some of those supposedly non-commercial zones were، in fact، highly productive pays , depending on pore-size distributionof the rock , movable or immovable fluids and production probability .
References used
“ NMR Logging Principles & Applications “ ; George R. Coates ، Lizhi Xiao ، and Manfred G. Prammer . Halliburton Energy Services Houston – 1999
http://petrowiki.org/index.php?title=Porosity_determination_ with_NMR_logging&printable
http://www.glossary.oilfield.slb.com/Terms/c/claybound_wat er.aspx
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This research highlights on new manner in study of petroleum
reservoir , by integrated between a sedimentary study, which
comprises micro slides from side, and geophysical well logging
interpretation from another side, in Juriba & Transition zone
formation, in ELmhash structure oil field , at Euphrates depression
– west DER Azzor -Syria.
A selection (5) wells in ELmhash structure is Mahash (17-18-11-4-
7).
All the well logging reinterpretation by using the new softwares, cores
analysis and results of seismic 2D and 3D surveys allowed to identify the
reservoir characteristics of Kurachina Dolomite Formation of middle Triassic,
for two zones (C2, D1)
in Jihar field and its affect on hydrocarbon potential in
this area.
It's found that C2 reservoir consist mostly of dolomite and small amount of
shale and anhydrite, fractured and all the fractures are full of organic
materials, calcite, anhydrite, silica and little amount of stilolite, while there is
succession of limestone and fossil remains, in some places there is shally
dolomite. Whereas D1 reservoir is mostly crystalline limestone and the
fractures filled with dolomite.
To determine the prime potential locations of the hydrocarbon structural traps in
Al-Qaryatein region, which can help in the hydrocarbon exploration processes and reducing a lot of time and fieldwork efforts, lineaments and circular features were i
dentified in the study area by processing and analysing Satellite data using several Remote Sensing techniques and Geographic Information Systems. The priority locations of subsurface structures were distinguished using several special criteria; these criteria are related to the density of the lineaments and their directions within the circular features of the study area. The priority locations of subsurface structures were evaluated by the integration of remote sensing and non-seismic geophysical data which were processed and interpreted by using their own techniques, to determine the prime potential locations of the hydrocarbon structural traps which reached three locations in the study area. The integration between geophysical data and remote sensing techniques increased the trust in the results of this study.
The experiment was conducted for one growing season 2011 at Teezen
Research Station in Hama Research Center-GCSAR in order to determine
water requirements, crop coefficient (Kc) and the effect of different irrigation
systems on productivity of pea
nut crop. Four methods of irrigation were used
(drip، sprinkler، mini sprinkler and surface irrigation) with three replications
for each . Experiment was designed on the basis of randomized complete block
with one water treatment (75% out of the field capacity). The results showed
superiority of drip irrigation in terms of water consumption, and total water
consumption (6522 m 3/h), which led to savings in irrigation water by (60.14%),
compared with traditional surface irrigation, with a consumption (13495 m 3/
h). It also outperformed drip irrigation when (p<0.05) in crop yield, reaching
productivity 5920 kg/ha, an increase of 22.57%, and total water use efficiency
1.91 kg/m3, compared with the (control) surface irrigation, reaching
productivity (4820) kg/ha. Followed by methods for: irrigation sprinkler sprays
small, with a water requirement (8999 and 9396 m 3/ h), and the efficient use of
water (0.67 and 0.58) kg/ m3, and the percentage of savings in water (36.65 and
31.98%), respectively, compared with surface irrigation traditional Phonology
developing did not show significant differences between irrigation methods in
terms of the dates of germination, flowering and maturity.
The geophysical surveys on the Syrian oil fields had begun since (1933);it
continued by the soviet groups (1952-1962) and were completed by the Syrian
national groups. The Derro oil field had a good lot from these studies, because
it was surveyed
and studied by the all known geophysical methods (gravity,
geoelectrics, siesmics, well logging).
This was possiple due to the fact that oil bearing formation in the above
mentioned field lays in very shallow depths, in comparison with the known oil
fields, the geoelectrical method was applied with good results and extreme low
cost.
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