Permanent Downhole Cable to Surface Gauges Technology and Real-time Monitoring System Optimizes Artificial Lift Wells Production Operations, B-Field Sultanate of Oman Case Study

Abstract

TX 75083-3836, U.S.A., fax +1-972-952-9435. AbstractThe principal considerations in designing a permanent gauge system are the accuracy, resolution and stability of the acquired data (pressure, temperature, flow) and the reliability with which this data can be transmitted to the end user. Cable to Surface gauges combined with the ISU, or ISP Unit can immediately satisfy metrological requirements for pressure and temperature data acquisition in real-time.Set against the industry demand, especially during the economic downturn, the objective of permanent downhole monitoring gauges with Cable to Surface (CTS) technology deployment is to optimize production and boost average recovery rates using a cost effective fit for purpose real-time monitoring system that involves technology (tools), people and process.The B-Field was discovered in 1991 by exploration well B-01. Twelve wells have been drilled since then and started producing oil in 1994 from one vertical well and the rest are horizontal wells. There is no injection well in this field. Based on a simulation study for an optimum infill drilling case, oil rate is predicted to increase by three folds in 2009, with a recovery factor is estimated to reach 17.2 % of its original oil in place by year 2026. This paper will describe applications and technical contribution of permanent downhole monitoring gauges using Cable to Surface technology digitally enabled with built-in sensors and linked to personnel with diagnostic and remediation skills, resulted pro-active measures and actions to improve equipment run life and well performance, as well as assist in reservoir management decision making.Examples include the use, methods and two field cases of the technology and system application in BM-17 progressive cavity pump (PCP) and BM-18 beam pump wells. Observation to the rest of the wells in this field is continuously performed to gain values from real-time optimization by reducing operating cost and restoring oil production.