Live downhole reservoir testing reduces rig time by 25%

Location

United Arab Emirates, Asia, Offshore

Summary

A customer had been performing drillstem tests (DSTs) with conventional packers and tools that are set by string weight, string movement, and hydrostatic pressure. SLB provided a portfolio of Symphony™ live downhole reservoir testing tools that are operated by acoustic wireless signals, eliminating the requirement of manipulating the DST string or applying hydrostatic pressure to operate those tools. The Symphony Isolate wireless high-integrity reservoir test isolation system enabled performing a dual-zone DST with a single run, reducing the rig time by 25% compared to two separate DST runs for each zone using conventional DST tools.

                    Delivered a 25% reduction in rig time by enabling dual-zone testing in a single DST run using the Symphony Isolate wireless high-integrity reservoir test isolation system
                

                    Allowed wireless zone switching and pressure buildups using Symphony testing tools, improving test reliability and lowering operational risk compared with conventional hydraulically actuated DST systems
                

                    By eliminating the need for two separate DST strings, the solution reduced associated CO₂e emissions from rig activity linked to additional operational days
                

Objective

The customer sought to evaluate multiple reservoir zones within a single well. Because each zone required a separate DST run, multiple DSTs were needed for each well, increasing rig time and overall well cost, reducing rig efficiency, and increasing emissions per well.

Results

The dual-zone DST string enabled isolation of two zones in a single run while providing the flexibility to switch flow between zones and perform pressure buildup using wirelessly operated Symphony testing tools. This solution eliminated the need for two separate DST runs, saving 25% of rig time, improving operational efficiency, and reducing emissions associated with additional rig time.

“We would like to express our appreciation for the excellent execution delivered during the recent dual zone operation. The successful implementation of the Muzic™ wireless telemetry and IRDV™ intelligent remote dual valve, together with the overall performance of all Symphony testing interfaces, played a key role in achieving the operational objectives.”

Customer

Symphony Isolate, Sample, Control & Measure

SLB introduced the dual-zone DST concept to enable testing of two zones in a single DST run. Symphony testing tools—including Isolate, Control, Sample, and Measure—were deployed to deliver the dual-zone DST solution.

Products Used

Symphony

Live downhole reservoir testing

Test your well with tools, expertise, and global capabilities, all in harmony.