Conceptual Study and Evaluation of the DTS-Fiber-Optic System as Moni-toring System of Injection-Production Profiles in Conventional Reservoirs: A Colombian Field Application

摘要

About 70%of the oil produced today comes from mature fields,which focuses the interest of the industry on these fields,especially when the recovery factor is low(under 30%). To increase the recovery factor,techniques as water injection can be implemented which also helps to mitigate the environment impact,transforming the water produced from an unwanted to a resource. Having permanent control over the reservoir when is going through a secondary recovery,requires optimize the processes of displacement and recovery.The monitoring has the power to set the behavior of operational parameters for the optimization of the injection-production operations and to diagnose potential problems,which allow having a specific and a general vision of the process. The continous monitoring process should be considered from the planning of injection-production system.The technology that provides constant monitoring is the DTS-Fiber Optics System,which allows the generation in real-time of production profiles and come across with more frequently the injection distribution.With the proper interpretation of these logs the following can be achieved:the injection rate optimization,injectivity leak detection,leak control in wells,cross-flow detection,the contribution of each zone in a stratified reservoir,and detection of the water breakthrough in the producer well. This paper contains a conceptual level study,which presents the working principle,applications worldwide,Benchmarking,benefits,advantages,best technical setup and the correct procedure for implementing the DTS-Fiber Optic system for both a producer and an injector well.Additionally an economic evaluation which compares the DTS-Fiber optic System with conventional monitoring systems currently implemented to generate injection and production profiles in the Yariguí-Cantagallo field in Colombia are presented. Finally,the main findings,conclusions and recommendations obtained in this study are shown.