Integrated Applications of Fiber-Optic Distributed Acoustic and Temperature Sensing

Abstract

Abstract Distributed Acoustic Sensing (DAS) and Distributed Temperature Sensing (DTS) measurements are leading edge technologies which are adding great benefits and solutions to a series of well and reservoir monitoring surveillance and management challenges. The main goal is to optimize the reservoir performance to achieve higher ultimate recovery, higher production, monitor overburden geomechanics, acquire wellbore seismic data, and monitor well integrity at a lower cost in both conventional and non- conventional reservoirs. DAS in combination with DTS offer qualitative and quantitative data for understanding the fluid dynamics both near and far from the wellbore to aid in decision making for optimal reservoir management. This is where fiber-optic DTS and DAS technology either permanently installed or temporarily deployed in the well can provide information on-demand at a low cost and minimal risk of failure. Enhanced reservoir management employs multiple integrated technologies for optimal area sweep, drainage, and recovery, as well as increasing the productivity index or injection conformance at the well, group and or field levels. Composite carbon rod deployed fiber-optic Distributed Temperature Sensing (DTS) and Distributed Acoustic Sensing (DAS) systems are one of the innovative technologies that has become available for real-time monitoring in support of advanced intervention methods and enhanced reservoir management. In non-conventional reservoirs fiber-optic are useful for monitoring hydraulic fracturing operations, and flow profiling during production. DAS and DTS measurements add a new dimension to gain knowledge from each perforation stage in long horizontal wells to optimize completions design and increase production efficiency and well performance. This paper presents a detailed description of the main steps followed to deliver timely and valuable DTS/DAS solutions and shows results from key field applications.