Intervention Project Management (IPM) Ltd have just finished working with one of our clients on a very successful intervention campaign on their installation located in West Coast of Africa. The campaign consisted of a Coiled Tubing cleanout on a well that had suffered a failure of the liner within the reservoir section.

This failure had allowed the well to produce large quantities of large rocks and sand which meant the well had to be removed from production service. The clean out operation also invovled the recovery of several pieces of metallic debris left in the well during the previous attempts to recover the well. Once the well had been cleaned to the required depth a permanent bridge plug was run to depth and installed above the failure point. The well was then returned to production service after being offline for ~21 months.

The second coiled tubing intervention involved a sand cleanout in a well that had suffered a failure within its sand face completion. This was executed using the reverse circulating method due to the low annular velocities that could be achieved. Once the well had been cleaned to TD a chemical treament was placed across the screens which dissolved any residual drilling mud present within the screens and causing an impairment to the screen performance. This was left to soak while new Baker Oil Tools 3.5" SlimPak screens were deployed into the well using the newly designed and manufactured Baker Hughes 4.2" SnapScreen connectors as a "Live Well Deployment". This is a "World First" for this type of application.

The remaining interventions involved wireline operations on two water injection wells, one to recover a lead fish (Lead lost from an LIB) stuck in the top of a wireline lock, carryout a tubing survey and return the well to injection service. The other was to attempt to regain injectivity into the Upper Reservoir section. The final well was to carryout some diagnostics on a production well that had suffered a drop in production and if possible to carryout some gas lift optimisation.

This very successful campaign resulted in two production wells being returned to service with combined rates of ~ 2500 - 3000 bopd and the fish being recovered from the water injection well allowing it to be returned to service at rate of ~ 11,000 bwpd.

These operations were completed on a normally unmanned wellhead tower using an accomodation vessel for support. All operations were completed safely and within the planned time and cost estimates for the interventions.

Intervention Project Management (IPM) Ltd were involved in the design, pre-planning (including cost and time estimates and AFE preparation) and the preparation of the procedures on behalf of our client. IPM sourced and provided some of Offshore Supervision for the execution of the operations as well as personnel within our clients offices in Aberdeen who looked after the day to day running of the operation. IPM also placed personnel within our clients offices / Base in country assisting with the logistics and in country support.

Our clients have deemed the project to be a great success and IPM and now working with our clients to review other wells to assist to identify other potential opportunities.