Designing of FRAC flow model in naturally fracture reservoir for reducing water conning mechanism

Abstract

Water coning is a complex phenomenon that depends on a large number of variables which affect the production rate, perforation interval, mobility ratio and capillary pressure. The water cut (WCT), oil production rate (OPR) and water saturation (BWSAT) at the producing interval was observed into ABC-field (Block 1,1, 1,2 and1,7) by simulating the fracture flow model with eclipse (100 black oil Simulator) used at different production rates to evaluate the water conning behavior in naturally fracture reservoir. In fractured reservoirs, this phenomenon is more complex owing to the high permeability of the fractures in the porous media. The production rate is highly affected during modelling which indicate a drastic decrease in (oil production rate), OPR initially at first 200 days of the production followed by continuous steady decline oil rate at 3000 STBD and developing conning behaviour in the producing well bore. Result shown that at optimum production rate of 500 STBD, oil production rate and water cut performance were decrease with slow increase of production rate where the water conning mechanism was control by optimum production rate through simulating of reservoir model. Furthermore the simulation model is validated with actual well production history that oil well undergoes with water coning problem and reduction in oil production rate. The production rate is controlled and optimized that tends to decrease coning problem.