Identification and distribution of hydraulic flow units of heterogeneous reservoir in Obaiyed gas field, Western Desert, Egypt: A case study

AAPG Bulletin ◽  
2021 ◽  
Vol 105 (12) ◽  
pp. 2405-2424
Author(s):  
Mohamed A. Kassab ◽  
Ahmed Elgibaly ◽  
Ali Abbas ◽  
Ibrahim Mabrouk
Keyword(s):  
Western Desert ◽  
Gas Field ◽  
Hydraulic Flow ◽  
Heterogeneous Reservoir ◽  
Flow Units ◽  
Hydraulic Flow Units

scholarly journals Application of Seismic Attribute Technique to estimate the 3D model of Hydraulic Flow Units: A case study of a gas field in Iran

2018 ◽  
Vol 27 (2) ◽  
pp. 145-157 ◽  
Author(s):  
Mohamad Iravani ◽  
Mahdi Rastegarnia ◽  
Dariush Javani ◽  
Ali Sanati ◽  
Seyed Hasan Hajiabadi
Keyword(s):  
3D Model ◽  
Seismic Attribute ◽  
Gas Field ◽  
Hydraulic Flow ◽  
Flow Units ◽  
Hydraulic Flow Units

Integrating XRD and Well Logging Data to Establish Electro-Facies and Permeability Models for an Unconventional Heterogeneous Tight Gas Reservoir, Obaiyed Giant Gas Field

2021 ◽  
Author(s):  
Ibrahim Mabrouk
Keyword(s):  
Development Strategy ◽  
Flow Unit ◽  
Petrographic Analysis ◽  
Production Forecast ◽  
Gas Field ◽  
Hydraulic Flow ◽  
Heterogeneous Reservoirs ◽  
Flow Units ◽  
Tight Gas Reservoir ◽  
Hydraulic Flow Units

Abstract Formation evaluation in heterogeneous reservoirs can be very challenging especially in fields that extend over several kilometers in area where the permeability varies from 0.1 mD up to 1000 D within the same porosity. The porosity, hydrocarbon saturation and net sand thickness in most of Obaiyed field wells are consistent; hence, the productivity of these wells is enormously dependent on the reservoir permeability. Since the permeability is highly heterogeneous, initial production rate of the wells varies between few MMSCFD to almost one hundred MMSCFD. The huge permeability variation led to a tremendous uncertainty in the dynamic modeling, which resulted in an inaccurate production forecast affecting the field economics estimation. Understanding permeability distribution and heterogeneity in Obaiyed field is the key factor for establishing a realistic permeability model, which will lead to a successful field development strategy. Extensive work was performed to understand key factors that govern the permeability in Obaiyed using the data of 1-kilometer length of cores acquired in more than 50 wells covering different reservoir properties in the field. Core data were used to separate the reservoir into different Hydraulic Flow Units (HFU) according to Amaefule's work performed on the Kozeny-Carmen model. Afterwards, a correlation between the HFU and well logs was established using IPSOM Electro-Facies module in order to define the flow units in un-cored wells. The result of this correlation was used to calibrate a Porosity-Permeability relationship for each flow unit. The next step was examining the clay-type distribution and diagenesis in each flow unit using the petrographic analysis (XRD) results from the core xdata. All factors controlling the permeability can now be represented in hydraulic flow units which are considered as a method of measurement of the reservoir quality. Consequently, property maps were constructed showing the location and continuity of each of the flow units, leading to a more deterministic approach in the well placement process. Based on this new work methodology, a production cut-off criteria relating the reservoir productivity to both clay minerals presence and percentages was established for multiple wells scenarios. As a result, the development strategy of the field changed from only vertical wells to include horizontal wells as well which proved to be the only economic approach to produce the Illite dominated zones. This paper presents a workflow to provide a representative estimation of permeability in extremely heterogeneous reservoirs especially the ones dominated by complex clay distribution.

Relative Permeability Coupled Saturation-Height Models Based on Hydraulic (Flow) Units in a Gas Field

2006 ◽  
Author(s):  
Maclean O. Amabeoku ◽  
David G. Kersey ◽  
Rami Hassan Bin Nasser ◽  
Ali Rashed Al-Belowi
Keyword(s):  
Relative Permeability ◽  
Gas Field ◽  
Hydraulic Flow ◽  
Flow Units ◽  
Hydraulic Flow Units

Relative Permeability Coupled Saturation-Height Models Based on Hydraulic (Flow) Units in a Gas Field

2008 ◽  
Vol 11 (06) ◽  
pp. 1013-1028 ◽  
Author(s):  
Maclean O. Amabeoku ◽  
David G. Kersey ◽  
Rami H. BinNasser ◽  
Ali R. Al-Belowi
Keyword(s):  
Relative Permeability ◽  
Gas Field ◽  
Hydraulic Flow ◽  
Flow Units ◽  
Hydraulic Flow Units
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