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ABSTRACT Mediterranean Sea offshore concessions are located about 30 โ 60 km off the Northern Egyptian coast. More than 25 gas prospects have been identified. These accumulations are often characterized by several hydraulically independent reservoirs. Three gas-condensate fields were discovered by three exploratory wells in 1982, 1983 & 1995, finding several gas bearing intervals inside Wakar and Abu Madi Formations (Miocene age). Following, further 9 gas fields have been discovered identifying several lean gas bearing intervals inside Kafr El Sheikh Formation (Pliocene age). In 2002, a lot of wells started to produce sand causing severe problems to the surface facilities and reducing the concessions production potential. In 2003, a sand control campaign was undertaken in Mediterranean Gas fields to recover the full fields' capacity using both Gravel Pack Completions (first time in Egypt in well PFMโ7) and Expandable Sand Screen Completions (first time in Egypt in well PFMโ8). By time, Expandable Sand Screen Completions proved its failure in many cases and are minimized to very limited cases. The aim of this poster is to highlight the advantage of Gravel Pack Completion technique used in North Port Said, Temsah & Baltim concessions over Expandable Sand Screen Completion technique focusing on successful case histories and its positive impact on production and reservoir potential. INTRODUCTION Most of the gas wells are producing from sandstone formations deposited in marine or delta environments. In the case of older and deep formations, sand grains are cemented by limestone or silica minerals, and in general the consolidation process is at a mature stage. More recent deposits, (starting approximately from the Miocene) are partially consolidated and their degree of cementation is non-existent or extremely low. In such reservoir, the sand production risk is extremely high. In most cases, sand production leads to serious operative problems affecting production and safety. This factor is one of the most important constraints in developing reservoirs in weak sandstone formations and, consequently, one of the main factors that determine the profitability of the investments.
- Africa > Middle East > Egypt > Nile Delta (0.54)
- North America > United States > Texas > Wharton County (0.40)
- Africa > Middle East > Egypt > Port Said Governorate > Port Said (0.24)
- Africa > Middle East > Egypt > Nile Delta > Nile Delta Basin > North El Amriya Concession > Kafr El Sheikh Formation (0.99)
- Africa > Middle East > Egypt > Port-Said > Nile Delta Basin > Temsah Field > Wakar Formation (0.98)
- Africa > Middle East > Egypt > Port-Said > Nile Delta Basin > Temsah Field > Sidi Salem Formation (0.98)
- (4 more...)
- Well Completion > Sand Control > Screen selection (1.00)
- Well Completion > Sand Control > Gravel pack design & evaluation (1.00)
ABSTRACT Nidoco NW field considers the development of reserves discovered located at the Mediterranean coast about 25km far from existing Abu Madi/El Qara gas treatment plant. In May 2015 Nidoco NW-2 onshore exploratory well was drilled reaching an offshore target. The reserves Showing a high gas and condensate potentiality in the Messinian level. The explored wells was planned to be exploited in early, medium and full filed development phase, the production then routed to the existing Abu Madi/El Qara plant for further treatment. The decision of developing Nidoco NW area through special strategy including a combination of Fast track procedures to accelerate the production and at the same time an inline evaluation to the existing system to maximize the area productivity. Till now the existing production system consist of nine producing wells with average production of 880 MMSCFD and planned to develop the whole area (Western and Southern Extension) in a Mega project including the development of 2 TCF. This paper will studying the effect of utilizing the second part of the development strategy on the production enhancement. The re-evaluation process will be performed to the existing production system starting from the wells down hole to the gathering manifold in terms of identifying the optimum lower completion system (OHGP vs. ICGP), optimum tubing size, pressure drop, hydrate formation, erosion velocities, loading calculation and choke modeling to determine optimum flow rate and recommended un-loading procedures. On the other hand the system will be also analyzed using multiphase flow simulation through developing a well dynamic model to consider many events that are inherently time-dependent, e.g., Wells start-up and shutdown; production Ramp up; Hydrates no touch time and chemical injection specially after start water production from the area. Re-Evaluation technique for the production system will assist in determining the system criticalities and challenges which consequently help in optimizing the system to insure smooth operation with maximum productivity. Also, Re-Evaluation process will help in the design of future wells to achieve best performance and maximize productivity. Finally, this study will provide the comparison between the current situation of existing wells and the different scenarios along the field life time including Sensitivity analysis for the main production key parameters to revel the optimum solutions, moreover improving the design procedures for the upcoming wells to ensure the best options for complete and produce from these wells.
- Energy > Oil & Gas > Upstream (1.00)
- Materials > Chemicals > Commodity Chemicals > Petrochemicals (0.69)
Innovative and Proactive โGeo-Stopping Technologyโ To Determine the Casing Point at Top of Depleted Zones; A Successful Case Study From Abu Rudeis Field (Nukhul Reservoir)
Sobhy, M. (Petrobel) | Khalil, M. (Petrobel) | Mariani, A. (Petrobel) | Salah, M. (Petrobel) | Giannone, S. (Petrobel) | Zayed, S. (Petrobel) | Samir, E. (Schlumberger)
ABSTRACT Horizontal and highly deviated wells are increasingly being used in oilfield developments worldwide, with the target to deliver higher oil production rates than conventional completions, optimizing the final field recoverable reserves. Nukhul Formation in Abu Rudeis Field is a clastic depleted reservoir of Oligo-Miocene age underlying pressurized Miocene Shale of Rudeis Formation. It consists of three sandstone layers intercalated by shale. The sharp thickness variations of Rudeis Basal Shale and Transition Nukhul Formation (TNAF) increase the uncertainty of casing point detection. When it is difficult to proactively predict the location of Top Nukhul due to these structural challenges, complete drilling fluid losses occur when drilling through Top Nukhul into the target sands without adjusting the mud weight and setting the casing at the correct depth. Treating these complete losses, and hence plugging back to perform a side-track increases hugely the total operational costs and time. Moreover, in order to detect the casing point so far a pilot hole was needed, requiring additional budget and drilling time. Belayim Petroleum Company (Petrobel) established an integrated team of different disciplines with the aim of identifying an innovative solution to proactively set the casing point exactly at top of depleted zones, reducing horizontal wells operational time and cost and avoiding the use of a pilot hole. The case history presented includes the first application of the Reservoir Mapping While Drilling service in Egypt as geo-stopping/landing technique in a horizontal well, with the primary objective of use this technology to map TNAF and land at a desired inclination to accurately and proactively set the correct casing depth. INTRODUCTION Petrobel developed a new plan to maximize the production from the Abu Rudeis Field, which included an extensive drilling campaign of horizontal wells. The Abu Rudeis Field is one of the oldest fields in the Gulf of Suez, producing mainly from the Nukhul sand reservoir. Nukhul Formation in Abu Rudeis Field is a clastic depleted reservoir of Oligo-Miocene age underlying pressurized Miocene Shale of Rudeis Formation.
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Mudrock > Shale (0.87)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Sandstone (0.54)
- Geology > Structural Geology > Fault > Dip-Slip Fault > Normal Fault (0.48)
- Geophysics > Borehole Geophysics (1.00)
- Geophysics > Seismic Surveying > Borehole Seismic Surveying (0.69)
- North America > United States > California > Sacramento Basin > 3 Formation (0.99)
- Africa > Middle East > Egypt > South Sinai Governorate > Lagia Field > Nukhul Formation (0.99)
- Africa > Middle East > Egypt > Gulf of Suez > Gulf of Suez Basin > Abu Rudeis Field (0.99)
- (4 more...)
ABSTRACT Production Logging Acquisition is the most fruitful way to collect information about down hole well behavior. One of the most critical parameters is the definition of the contributing net pay during well test operations in order to reduce the Pressure Transient Analysis uncertainties. Where possible, a PLT string may be run at the end of the well test to provide a down-hole flow profile and a discrete fluid allocation in front of the perforated interval at the different choke conditions. However, these operations in offshore deep-water wells are often not performed because they are risky, time consuming and therefore with high associated costs. Recently a new temperature tool able to be integrated on perforation guns has been introduced into commercial service. This specific configuration has been successfully tested in a deep water gas well in the Egyptian offshore (Zohr field) in order to map the flowing temperature profile in front of the perforated zone during all the well test periods (perforations, clean-up, main flows and build-up phases). The acquired temperature profiles versus time were collected in memory mode and interpreted in order to obtain a quantitative down-hole flow profile characterized by a robust agreement with the reservoir petrophysical properties. Finally, the calculated productive pay was used for well test interpretation, leading to a better understanding of the reservoir behaviour and a more detailed calibration of the 3D reservoir model. Most importantly, the data collected with such application has allowed detailed characterization of the deliverability of the various reservoir zones, in particular the lower permeability intervals. INTRODUCTION Understanding fluid movement from the reservoir through the perforated intervals becomes crucial in conventional well management but it is also considered strategic during well test operation in defining the actual producing net pay. This information is not only required for a comprehensive dynamic petrophysical reservoir characterization but can also provide reliable input data for a more robust pressure transient analysis.
- Africa > Middle East > Egypt > Mediterranean Sea (0.61)
- North America > United States (0.47)
- Africa > Middle East > Egypt > Mediterranean Sea > Levantine Basin > Shorouk Concession > Shorouk Block > Zohr Field > Abu Madi Formation (0.99)
- North America > United States > Texas > West Gulf Coast Tertiary Basin > Egypt Field (0.98)