Autonomous ICD Introduction in Singue Field Ecuador: Completion Methodology and Production Evaluation

Abstract

Abstract Inflow Control Device (ICD) technology delays the production of unwanted fluids while addressing some of the challenges associated with long horizontal and deviated wells. Autonomous ICD (AICD) technology functions like ICDs during dry oil production by balancing the flow. AICDs proactively delay the onset of unwanted fluids (water and gas) and additionally, reactively, restrict the flow of water and gas upon breakthrough. This paper presents AICD installations in multiple horizontal wells of the Singue oil field development in Ecuador. The fluidic diode AICDs are fluid dependent and will react to the viscosity of the downhole fluid creating an additional pressure differential to restrict the production of unwanted fluids. The paper presents the introduction of this technology into the first horizontal wells of the Singue field. The wells are in a sandstone reservoir with an underlying aquifer and demonstrate increasing water cut over time. The completion designs and optimization of these wells were based on the production objectives and calibrated with field production data. Best practices of simulation modelling for both design phase and post-match results are presented. Production data of WC% reduction and Oil production continuity over time demonstrate the value of the AICD completions. Post-match simulation modelling is used for the analysis of the technology at different conditions over the production life of the wells. Historical production data is used to build numerical models for comparison and evaluation purposes. It is observed from these results and analysis, that installing AICDs on the horizontal wells delays the increase rate of water cut curve which results in higher recovery over time and longer wells longevity. Operational considerations including ESP pump parameters for completion design and future well management are discussed. Well clean-up and fluid conditioning recommendations are included as part of the best practices and lessons learned. The AICD technology, design methodology and production performance evaluation for the AICD completions were applied for the first time in this new field development. The analysis covers the complete cycle from reservoir modelling, completion design, post-drilling match, calibration and production performance analysis over time for evaluation of the technology.