Formation Evaluation While Drilling Of a Complex Khuff-C Carbonate Reservoir in Ghawar Field, Saudi Arabia

2007 ◽  
Author(s):  
Abdullah Abdulrahman Al-Fawwaz ◽  
Nedhal Mohamed Al-Musharfi ◽  
Parvez Jamil Butt ◽  
Abdul Fareed
Keyword(s):  
Saudi Arabia ◽  
Carbonate Reservoir ◽  
Formation Evaluation ◽  
Ghawar Field

scholarly journals Tilted original oil/water contact in the Arab-D reservoir, Ghawar field, Saudi Arabia

GeoArabia ◽  
2003 ◽  
Vol 8 (1) ◽  
pp. 9-42
Author(s):  
Bruno Stenger ◽  
Tony Pham ◽  
Nabeel Al-Afaleg ◽  
Paul Lawrence
Keyword(s):  
Saudi Arabia ◽  
Salinity Gradient ◽  
Regional Scale ◽  
Carbonate Reservoir ◽  
Reservoir Water ◽  
Technical Literature ◽  
Water Contact ◽  
Full Field ◽  
Oil Water ◽  
Ghawar Field

ABSTRACT A review of the electrical logs, fluid properties, and production history of 195 flank wells drilled in the Arab-D carbonate reservoir of the Ghawar field, Saudi Arabia, showed that the original oil/water contact was regionally tilted. The contact was about 200 ft higher in the southern Haradh sector than in the northern Shedgum and ‘Ain Dar sectors. In Haradh, the fluid contact was also locally tilted down from west to east by as much as 800 ft. In the reservoir, the oil and aquifer densities changed from lighter oil and denser water in the north to lighter water and denser oil in the south. Decreasing methane content caused the increase in oil density and a reduction in the water density was the result of a salinity decrease. The evolution of fluid densities was closely correlated to a decreasing regional-scale geothermal gradient, probably indicating that temperature controlled the distribution of fluid densities. Simple analytical calculations showed that the magnitude of the observed tilt of the original oil/water contact from north to south might be explained by changes in fluid densities. On the western flank of central Haradh, the Arab-D reservoir water was anomalously young and fresh and this created a large salinity gradient between the western and eastern aquifer legs. This anomaly was explained by pressure-dependent vertical leakage along the Wadi Sahba structural trough between the Arab-D reservoir and the shallower Biyadh aquifer. Consequently, the integrity of the Hith Formation seal above the Arab-D reservoir might be locally compromised under particular conditions. A full-field reservoir simulation model, specific geological features, and examples from the technical literature supported a static interpretation of the tilted original oil/water contact in the Arab-D reservoir of Ghawar through the combined effects of changes in oil and water densities.

scholarly journals Geostatistical Model for the Arab-D Reservoir, North ’Ain Dar Pilot, Ghawar Field, Saudi Arabia: An Improved Reservoir Simulation Model

GeoArabia ◽  
1996 ◽  
Vol 1 (2) ◽  
pp. 267-284
Author(s):  
John L. Douglas ◽  
Keyword(s):  
Saudi Arabia ◽  
Fluid Flow ◽  
Reservoir Rock ◽  
Well Test ◽  
Geostatistical Model ◽  
Deterministic Models ◽  
Modeling Approach ◽  
The North ◽  
Porosity And Permeability ◽  
Ghawar Field

ABSTRACT The North ‘Ain Dar 3-D geocellular model consists of geostatistical models for electrofacies, porosity and permeability for a portion of the Jurassic Arab-D reservoir of Ghawar field, Saudi Arabia. The reservoir consists of a series of shallow water carbonate shelf sediments and is subdivided into 10 time-stratigraphic slices on the basis of core descriptions and gamma/porosity log correlations. The North ‘Ain Dar model includes an electrofacies model and electrofacies-dependent porosity and permeability models. Sequential Indicator Simulations were used to create the electrofacies and porosity models. Cloud Transform Simulations were used to generate permeability models. Advantages of the geostatistical modeling approach used here include: (1) porosity and permeability models are constrained by the electrofacies model, i.e. by the distribution of reservoir rock types; (2) patterns of spatial correlation and variability present in well log and core data are built into the models; (3) data extremes are preserved and are incorporated into the model. These are critical when it comes to determining fluid flow patterns in the reservoir. Comparison of model Kh with production data Kh indicates that the stratigraphic boundaries used in the model generally coincide with shifts in fluid flow as indicated by flowmeter data, and therefore represent reasonable flow unit boundaries. Further, model permeability and production estimated permeability are correlated on a Kh basis, in terms of vertical patterns of distribution and cumulative Kh values at well locations. This agreement between model and well test Kh improves on previous, deterministic models of the Arab-D reservoir and indicates that the modeling approach used in North ‘Ain Dar should be applicable to other portions of the Ghawar reservoir.

Plug and Abandonment of a Fractured Carbonate Reservoir in Saudi Arabia

2015 ◽  
Author(s):  
Syed Muhammed Danish ◽  
Faisal Zubair Khan
Keyword(s):  
Saudi Arabia ◽  
Carbonate Reservoir ◽  
Fractured Carbonate

Improved Technique for Wireline Oil Sampling of a Tight Carbonate Reservoir in the Partitioned Neutral Zone (Kuwait/Saudi Arabia): A Case Study

2010 ◽  
Author(s):  
Mosaad Hamdallah Omar ◽  
Ahmed Nouman Bouyabes ◽  
Boon Cheng Cheong ◽  
Mansoor Ali Rampurawala
Keyword(s):  
Saudi Arabia ◽  
Carbonate Reservoir ◽  
Neutral Zone ◽  
Tight Carbonate ◽  
Improved Technique

An Innovative Approach to Formation Evaluation with a Sourceless LWD Technology for the First Time in Joint Operations, A Case Study From Partitioned Zone Between Kuwait and Saudi Arabia

2015 ◽  
Author(s):  
Jamal Al-Rubaiyea ◽  
Ahmad Al-Bader ◽  
Meshari Al-Houli ◽  
Abdul-aziz Al-Najim ◽  
Majed Al-Duwaish ◽  
...  
Keyword(s):  
Saudi Arabia ◽  
Innovative Approach ◽  
Formation Evaluation ◽  
Joint Operations ◽  
First Time

Evolution of Coiled Tubing Fiber Optic Real-Time Telemetry System in Saudi Arabia Ghawar Field Interventions

2017 ◽  
Author(s):  
Ahmed. Duaij ◽  
Danish. Ahmed ◽  
Mohammad Arifin ◽  
Adzlan Ayob ◽  
Rodrigo Sa ◽  
...  
Keyword(s):  
Saudi Arabia ◽  
Real Time ◽  
Fiber Optic ◽  
Telemetry System ◽  
Coiled Tubing ◽  
Ghawar Field
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