Intermittent Gas Lift Technology for Optimising Production from an Oilfield Using Next Generation IoT Based Intelligent Autonomous Controller

Abstract

This paper outlines an approach to optimize production from a shallow, low bottomhole pressure (BHP) reservoir in a mature onshore oilfield by the application of intermittent gas lift technology using Next Generation Internet of Things (IoT) based Intelligent Controller which works on industry 4.0 technologies. Enhanced software-based analysis, design, optimization, and automation has proved to be effective in enhancing the production rate from an existing gas lifted well.

A selection criterion and workflow setup were devised for a major operator to enhance the efficiency of a gas lift system. Low production capacity wells were analyzed, designed, and troubleshooted from an intermittent gas lift technology perspective. It incorporated an IoT-based intelligent autonomous surface controller with a minimal change in downhole completion jewelry which eliminated the need of workovers, optimized oil production, reduced over injection of gas, diminished downtime, and improved the effectiveness of the overall petroleum production process beyond the capability of a conventional gas lift system.

This system was successfully installed in wells with 2.375-in. tubing without any production deferment. A pilot project on sixteen wells for a major operator in the Middle East exhibited a significant improvement in well performance with an incremental gain of 600 bfpd along with savings of 5 mmscfd of injection gas. It is a cost-effective technology to optimize production and enhance the field value from existing wells.

This paper considers cases in which an integrated software-automation portfolio helps in reviving and increasing ultimate recovery and recommends suitable actions which allow production engineers to analyze performance of reviving existing oil wells. With the increased complexity of mature fields, each next step to enhance recovery comes with increased cost. Therefore, novel horizons of affordable technology will play a pivotal role to maximize economic recovery and meet rising demand in the current business environment.