Projects

Efficient cement placement possible with magneto-rheological blended cement (MRBC) for effective barriers - potentially saving £4M annually

The OGTC has worked in partnership with WellSet AS to investigate the feasibility of using magnetic rheology in well cementing.

Magnetic particles are blended into cement: the application of a magnetic field aligns particles to enhance cement displacement efficiency and immunity to gravitational migration, potentially leading to more accurate cement placement and better cement integrity for water shut-off as well as the potential to set shorter abandonment plugs. Traditionally, gravitational pulls cause cement to slump and move away from the location it was intended to act as a barrier.

Magneto-rheological blended cement (MRBC) is an innovative material that requires the transmission of an electromagnetic field downhole through carbon steel casing.

Industry Value

Phase one of the project was established to prove the concept through a feasibility study and sought to examine:
- What are the optimal MRBC blend formulations for annulus barrier plugs?
- How can an electromagnetic (EM) field be effectively transmitted through carbon steel casing?
- What are the electrical requirements for the electromagnetic fields?
- How can we maximise MRBC displacement efficiency?

Improving the placement of cement in the annulus and preventing repeat cement jobs could save around one days rig time for each application. Based on approximately 10 wells per year, this could save £4 million annually.

Technology Organisation

WellSet

Well-Set P&A is a young start-up taking a fresh approach to well abandonment. By thinking 'outside of the box' we have devised innovated new techniques to drive down the cost and risk associated with well decommissoning.

http://www.wellset.no

ProjectWellSet - Magnetic Cement & Annular Test (Phase 2 WC-P-043)

Challenge

Wells

Vision

Fix Today

Entry TRL

2

Field Trial

No

Technology

Magnetic Cement & Annular Test (Phase 2 WC-P-043)

Type

Develop

Achieved TRL

4

Technology Organisation

WellSet

Well-Set P&A is a young start-up taking a fresh approach to well abandonment. By thinking 'outside of the box' we have devised innovated new techniques to drive down the cost and risk associated with well decommissoning.

http://www.wellset.no

Key Results

The overall purpose of phase one was completed successfully with the outcome that an EM field can be transmitted through a carbon steel casing to provide an annular barrier in a wellbore.

Lessons Learned

With patent applications filed, WellSet intends to develop suitable blends of MRBC with associated placement techniques and downhole tools to facilitate the use of MRBC as an effective annular barrier medium both for water shut-off and well plug and abandonment (P&A) applications. Once commercialised, this material can act as an 'enabler' for rigless P&A operations, significantly reducing the cost of well P&A.

The success of phase one has resulted in phase two of this project, which continues being supported by The OGTC, as well as industry partners.

The deliverables for phase two are:
1. Downhole technology to effectively transmit an EM field into a single annular space through carbon steel casing will be developed, tested on surface and qualified for use in a pilot well.
2. The feasibility of the use of MRBC as a barrier medium in multiple annuli will be assessed and laboratory testing will be performed.
3. Downhole technology to facilitate the deployment of MRBC barriers 'thru-tubing' will be developed in concept and will be ready for full scale testing on surface.

Next Steps

Further physical testing and blend testing will be completed throughout the coming months to furtherwork upon and validate the results which have been presented in Phase 1.
WellSet have submitted a proposal to take this project to the next Phase. The deliverables for Phase 2 are:
1. Downhole technology to effectively transmit an EM field into a single annular space through carbon steel casing will be developed, tested on surface and qualified for use in a pilot well.
2. The feasibility of the use of MRBC as a barrier medium in multiple annuli will be assessed and laboratory testing will be performed.
3. Downhole technology to facilitate the deployment of MRBC barriers 'thru-tubing' will be developed in concept and will be ready for full scale testing on surface.