Projects

Rigless compaction technology for well plug and abandonment could save £4m per well

The OGTC supported Oilfield Innovations' onshore trial for enabling new rigless well plug and abandonment technology.

Traditionally, abandonment of oil and gas wells is an expensive process using a rig to pull the tubing (reversing the installation process), which then provides unobstructed casing space for cementation opportunities.

New technology developed by Oilfield Innovation removes a window of approximately 100ft of completion tubing (from above the production packer) to allow access to the production casing for logging and barrier placement, without the need to bring in a rig to recover the entire completion string. Using a piston/hydraulic force to compact the tubing, the piston can also clean casing surfaces during compaction to provide an unobstructed casing space suitable for cement bond logging and placement of a cement plug.

Industry Value

Rigless abandonment offers savings of up to £4 million per well - based on 10% of the 1,400 UKCS wells. This could save the UKCS £50 million per year.

Technology Organisation

Oilfield Innovations Limited

Oilfield Innovations Limited is a leader in developing new technology for the Oil and Gas Industry.

https://www.oilfieldinnovations.com

ProjectOilField Innovation - Tubing Compaction

Challenge

Wells

Vision

Fix Today

Entry TRL

3

Field Trial

No

Technology

Tubing Compaction

Type

Adapt

Achieved TRL

4

Technology Organisation

Oilfield Innovations Limited

Oilfield Innovations Limited is a leader in developing new technology for the Oil and Gas Industry.

https://www.oilfieldinnovations.com

Key Results

Twelve simulation trials were successfully carried out. Half of the trials demonstrated exceeded 47% compaction of 4½" 13Cr L80 12.6-ppf tubing and 5½ inch 13CrL80 17.0-ppf tubing inside of 9⅝ inch 53.5-ppf casing.

The capability could become an enabler for rigless well plugging and abandonment.

Not only does the technique reduce risk with minimum personnel and equipment mobilisation, it also reduces pollution by leaving existing barriers and pollutants in place in the well.

Footage of the trial is available to watch.

Lessons Learned

The trials also provided data for a subsequent project by the Oil & Gas Innovation Centre (OGIC) and The University of Glasgow, to mathematically predict tubing compaction results using existing well information.

Next Steps

OILtd has funded and received matching State-funding for an Oil & Gas Innovations Centre [OGIC] project with the University of Glasgow to develop mathematical equations for this compaction technology using the data obtained from the OGTC WC-P- 005.The OGIC project will include intensive mathematical analysis of OGTC project data to develop a predictive model of hydraulically compacting tubulars using a small-scale laboratory test rig for fine tuning the parameters within the model. The OGIC project will be concluded with publication of a technical paper summarizing there sults of the physical and numerical modelling. The OGIC project starts in March 2018.