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Article
Formation Evaluation by using Well Logging of Mishrif Formation in the Noor Oil Field, , Southeast Iraq
التقييم المكمني بأستخدام الجس البئري لتكوين المشرف في حقل النور النفطي جنوب شرق العراق

Authors: Ali M. Hasan Altameemi علي محمد حسن التميمي --- Aiad Alzaidy أياد علي حسين الزيدي
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2018 Volume: 59 Issue: 1A Pages: 144-155
Publisher: Baghdad University جامعة بغداد

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Abstract

Mishrif Formation regards one of the most important reservoirs in Iraq.Well logging represents one of the most important tool in the formation evaluation. According to the Petrophysical properties that have been gotten from well logging, Mishrif Formation in terms of reservoirs units, consist of several reservoirs units..Major reservoirs units divided into three reservoir units,MA,MB&MC. Each of these major units divided into minor reservoirs units (MB11,MB12,MC2&MC3).MB major reservoir units represent the best reservoir unit.These reservoirs units separated by cap rocks(mainly tight limestone)(CR1,CR2,CR3,CR4,CR5,CR6,and CR7).CPI were demonstrated for all wells.Hydrocarbon saturation vs. water saturation have been determined for each units.In addition, the types porosity and moveable vs.residual oil were calculated.

يعتبرتكوين المشرف واحدا من اهم المكامن النفطية في العراق والشرق الاوسط . الجس البئري يعتبر واحدا من اهم ادوات التقييم المكمني . من خلال دراسة الخواص البتروفيزيائية المستحصلة لهذا التكوين , تكوين المشرف في مصطلح الخواص المكمنية يتكون من عدة وحدات مكمنية . الوحدات المكمنية الرئيسة في تكوين المشرف قسمت الى ثلاث وحدات مكمنية ( MA ,MB ,MC ) كل واحدة من هذه الوحدات المكمنية قسمت الى وحدات ثانوية ( MB11,MB12,MC2&MC3). الوحدة المكمنية الرئيسة( (MB تعتبر من أحسن الوحدات المكمنية . الوحدات المكمنية مفصولة عن بعضها بصخور صماء تتكون من الحجر الجيري (CR1,CR2,CR3,CR4,CR5,CR6,and CR7) . تم بناء منحنيات تفسيرات الجس البئري وتم تحديد نطاق التشبع النفطي والمائي لكل وحدة مكمنية.تم حساب انواع المسامية وتحديد النفط المتحرك من النفط المتبقي.


Article
Permeability Estimation for Carbonate Reservoir (Case Study/ South Iraqi Field)
تقييم النفاذية للمكمن الكربوني (دراسة حالة/حقل جنوب العراق)

Authors: Samaher A. Lazim --- Sameera M. Hamd-Allah --- Ali Hussain Jawad
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2018 Volume: 19 Issue: 3 Pages: 41-45
Publisher: Baghdad University جامعة بغداد

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Abstract

The heterogeneity nature of carbonate reservoirs shows sever scattering of the data, therefore, one has to be cautious in using the permeability- porosity correlation for calculating permeability unless a good correlation coefficient is available. In addition, a permeability- porosity correlation technique is not enough by itself since simulation studies also require more accurate tools for reservoir description and diagnosis of flow and non-flow units.Evaluation of reservoir characterization was conducted by this paper for Mishrif Formation in south Iraqi oil field (heterogeneous carbonate reservoir), namely the permeability-porosity correlation, the hydraulic units (HU’s) and global hydraulic elements (GHE) methods depending on Reservoir Quality Index(RQI) concepts.

طبيعة عدم التجانسية للمكامن الكاربونية تظهر من خلال التشتت الحاد للبيانات ولذلك يجب توخي الحذر في استخدام علاقة الارتباط المتبادلة للنفاذية- مسمامية لحساب النفاذية مالم يكون هناك معامل ارتباط جيد متاح. بالاضافة الى ذلك فإن تقنية علاقة الارتباط المتبادلة للنفاذية- المسامية غير كافية بحد ذاتها وذلك لكون دراسات المحاكاة تتطلب ايضا ادوات اكثر دقة لوصف المكمن وتشخيص الوحدات ذات الجريان وعدم الجريان.التقييم لتوصيف المكمن تم أجراؤه من خلال هذا البحث لتكوين المشرف لحقل نفطي في جنوب العراف (مكمن كاربوني غير متجانس), وهي علاقة الارتباط بين النفاذية- المسامية ,طريقةالوحدات الهيدروليكية (HU's) وطريقةالعناصر الهيدروليكية العالمية (GHE) ابالاعتماد على دليل جودة المكمن ( RQI).


Article
Geological modeling using Petrel Software for Mishrif Formation in Noor Oil Field, Southeastern Iraq

Authors: Ali M. Hasan Altameemi --- Aiad Alzaidy
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2018 Volume: 59 Issue: 3C Pages: 1600-1613
Publisher: Baghdad University جامعة بغداد

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Abstract

Petrel is regards one of the most important software to delineate subsurface Petrophysical properties to the reservoir. In this study, 3D Integrated geological models has been built by using Petrel software. The process includes integrated Petrophysical properties and environmental approaches. Noor oil field within Mishrif Formation in terms of structural geology represents asymmetrical anticlinal fold with direction NW-SE. Porosity and water saturation model have been built. The reservoir was divided into several reservoirs and Non-reservoir units depends on the Petrophysical properties for each zone. In addition, intact model for the reservoir in terms of porosity and water saturation have been built. MB reservoir unit represents the most important oil bearing unit according to the high porosity and low water saturation are present in this unit. MB reservoir unit in terms of Paleoenvironment which represent the shoal including rudist biostrome. Rudist biostrome buildups comprise the major oil producing reservoirs in the carbonate strata during Cretaceous Period.


Article
Microfacies Analysis and Stratigraphic Development of the Mishrif Formation in the Eastern of the Mesopotamian Zone, Southeastern Iraq

Author: Medhat E. Nasser
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2018 Volume: 59 Issue: 4B Pages: 2053-2064
Publisher: Baghdad University جامعة بغداد

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Abstract

Mishrif Formation is the most important succession in the southern part of Iraq and has extensive distribution in the Arabian Plate. The present study focuses upon the sequence stratigraphy and development of Mishrif Formation basin in four oil fields within the eastern part of the Mesopotamian Zone are:- Halfaya (Hf-1), Noor (No-1) and Abu Ghirab (AG-3) and Fauqi oil fields (Fq-1). There are several types of microfacies were distinguished in the succession of the Mishrif Formation. Their characteristic of the grain types and carbonate texture enabled to interpret of five facies associations (depositional environments) were observed in this formation, they are: deep marine, shallow open marine, Shoal, rudist biostorm, and shallow restricted associations facies. The stratigraphic development of Mishrif succession in the studied oil fields was summarized by three depositional stages during the Cenomanian-Early Turonian cycle:- First stage:- the basin of Rumaila Formation during this stage was continued to deposition the lower part of Mishrif Formation within the deep marine environment. The end of deposition in this basin (Rumaila basin) was represented by shallow open marine associated facies in the studied area. The High stand sequence distinguished by deposition the deep marine facies and the shallow open marine as two cycle in the southwest, while to the northeast one cycle. The end of the first stage was finished by the shoal facies in all studied area to mark a sequence boundary type II (prograde stage A). Second stage:- the basin was developed from shoal to biostorm facies association with slow sea level rise. The deposition of the open marine associated facies within the biostorm-shoal sequence marked the mfs surface. The final step of this stage was shown the shallowing up-ward by overlaying the shallow open marine association facies upon the biostorm and shoal. At the end of this period, the lagoon/restricted facies were spread in the studied area to mark the prograde stage B as sequence boundary type II. Third stage:- the sea level raised in the southwest direction as open sea association facies, while to the northeast the restricted facies was dominated. This sequence appeared the shoal facies underly the open sea facies marked the mfs surface to start the final high stand deposition overly the restricted facies. This stage is representing the prograde stage C for the Mishrif Formation, where ended the deposition to mark the unconformable surface (SBI) with Khasib Formation.

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