International Journal of Petroleum Science and Technology

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Simulation of Water Coning Phenomena in Fractured Reservoirs


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1 Department of Chemical & Petroleum Engineering, University of Uyo, Uyo - Akwa Ibom State., Nigeria
     

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Water coning behaviour in fractured reservoir was studied by simulating a reservoir supported by a strong aquifer using ECLIPSE-100 Black-Oil Simulator. The water cut (WCT), oil production rate (OPR) and water saturation (BWSAT) at the producing interval (Block 1, 1, 7) were used to evaluate the coning phenomenon in the fractured reservoir. Sensitivity analyses on the modelled reservoir's anisotropy ratio (kv/kh), production rate (q), storativity capacity (ω), fracture width (b) and fracture permeability (kf) were conducted to evaluate their effect on coning behaviour in the fractured reservoir. The results obtained depict that while the anisotropy ratio is very significant in water cut and water saturation at the perforating interval, it has no adverse effect on oil production rate. It was, however, observed that the water cut and oil production rate decreased as the production rate (q) increased. Furthermore, the water cut, oil production rate and water saturation (BWSAT) from the fractured reservoir were observed to be sensitive to the storativity capacity (ω) depending on the fracture porosity (φf). Conversely, the fracture width (b) and permeability (kf) had no significant effect on the coning behaviour of the modelled fractured reservoir. However, anisotropy ratio (kv/kh), production rate as well as storativity capacity (ω) are significant parameters in evaluating coning phenomenon in fractured reservoirs.

Keywords

Coning Phenomena, Fractured Reservoir, Permeability, Production Rate, Simulation
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  • Simulation of Water Coning Phenomena in Fractured Reservoirs

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Authors

Anietie N. Okon
Department of Chemical & Petroleum Engineering, University of Uyo, Uyo - Akwa Ibom State., Nigeria
Francis D. Udoh
Department of Chemical & Petroleum Engineering, University of Uyo, Uyo - Akwa Ibom State., Nigeria

Abstract


Water coning behaviour in fractured reservoir was studied by simulating a reservoir supported by a strong aquifer using ECLIPSE-100 Black-Oil Simulator. The water cut (WCT), oil production rate (OPR) and water saturation (BWSAT) at the producing interval (Block 1, 1, 7) were used to evaluate the coning phenomenon in the fractured reservoir. Sensitivity analyses on the modelled reservoir's anisotropy ratio (kv/kh), production rate (q), storativity capacity (ω), fracture width (b) and fracture permeability (kf) were conducted to evaluate their effect on coning behaviour in the fractured reservoir. The results obtained depict that while the anisotropy ratio is very significant in water cut and water saturation at the perforating interval, it has no adverse effect on oil production rate. It was, however, observed that the water cut and oil production rate decreased as the production rate (q) increased. Furthermore, the water cut, oil production rate and water saturation (BWSAT) from the fractured reservoir were observed to be sensitive to the storativity capacity (ω) depending on the fracture porosity (φf). Conversely, the fracture width (b) and permeability (kf) had no significant effect on the coning behaviour of the modelled fractured reservoir. However, anisotropy ratio (kv/kh), production rate as well as storativity capacity (ω) are significant parameters in evaluating coning phenomenon in fractured reservoirs.

Keywords


Coning Phenomena, Fractured Reservoir, Permeability, Production Rate, Simulation

References