Development of Affordable High-Temperature Downhole Sensors

Abstract

Conventional technology on downhole sensors allowed the development of standard equipment capable to work in wells up to 150°C and some cases 175°C permanently. If higher temperature is required, existing technology offers sensors that can operate up to 260°C without electronics downhole. Such sensors use separate encased multicore cables. But cost and deployment are limitations making instrumentation not feasible for high WC wells. Thus, confining these products to specific application such SAGD. Using Defense and Aerospace technology, an affordable downhole sensor was developed for Panamerican Energy to withstand 225°C permanently and have excursions on 250°C. This sensor does not require an additional cable. Communication is achieved by over imposing the digital signal in the existing power cable, reducing cost and installation complexity. This paper shows the development of the product, specifications, and lab tests, field examples that helped to maximize production and protect the artificial lift equipment.