SENSITIVITY ANALYSIS OF PRODUCTION SYSTEM PARAMETERS FOR INTEGRATED SIMULATION OF RESERVOIR-PRODUCTION SYSTEMS

The integrated simulations of reservoir and production systems to predict the production of multi-reservoirs systems with several production platforms have generated great interest in the oil and gas industry. Mainly in offshore production, where this problem is most relevant. The correct sizing and accurate predictions are of great importance in the production project. Recent discoveries in the Brazilian Pre-salt intensified this interest since old and new fields can share existing production systems. Many works deal with these issues considering simplifications and limitations, mainly with respect to reservoir and production systems integration. Studies with certain parameters are considered in a simple production system built on appropriate commercial simulator for integration with reservoir simulator. This paper has two main objectives: (i) sensitivity analysis to verify important parameters that impact on production, including pipeline diameters, gas-liquid ratio, water cut, gas injection flowrates in gas lift, using a commercial production simulator and identifying the boundaries of this production system; (ii) analysis of the production system characteristics using coupling between reservoir and production simulators. The coupling of simulators for each system is performed with software (explicit methodology) developed internally. The results are promising and indicate good perspectives for the use of integration among reservoir and production systems. Rio Oil & Gas Expo and Conference 2016