Cuttings re-injection works by grinding cuttings into a slurry and pumping it into a formation at pressures above the fracture gradient, where it is stored in induced fractures. It is attractive because it removes the waste permanently, avoids transport and keeps discharge out of the environment, and it is used extensively offshore and in environmentally sensitive areas.

It also carries real risk. The injected slurry must stay in the target formation, which means the fracture must be contained by overlying barriers and the injection pressure and volume must be managed so that fractures do not grow to surface, to a shallower aquifer or to another well. Failures of containment have occurred, including broaches to seabed, and they are expensive and damaging.

The other options have their own constraints. Offshore discharge is limited by oil on cuttings regulations that effectively exclude oil-based cuttings in most jurisdictions. Thermal treatment is effective but energy intensive and expensive. Land treatment needs suitable sites and long timescales. This course covers the full comparison so that the right route is chosen on evidence.

By the end of this training, participants will be able to:

• Characterise drilling waste streams and estimate volumes.
• Select disposal routes based on regulations, cost and risk.
• Design slurrification and particle size reduction for cuttings re-injection.
• Specify slurry properties for successful injection.
• Select injection formations and design injection wells.
• Predict fracture geometry and assess containment.
• Manage injection pressure, rate and batch scheduling.
• Design monitoring and verification programmes for injection operations.
• Compare surface treatment technologies and their application.
• Apply regulatory requirements, cost comparison and risk management to waste disposal.

The course is instructor-led. Cuttings re-injection is developed through a design case covering slurry design, well selection, containment assessment and monitoring. Surface treatment and disposal options are compared with cost and performance data. Field cases include successful injection campaigns and containment failures with their causes. Participants are encouraged to bring their own disposal problems for discussion.

Organisations sending participants to this training will:

• Select drilling waste disposal routes on evidence rather than habit.
• Reduce waste transport, treatment and disposal cost.
• Design cuttings re-injection operations that stay contained.
• Meet discharge and waste regulations reliably.
• Reduce environmental and regulatory risk from drilling waste.

Participants will:

• Understand all drilling waste disposal options and their constraints.
• Be able to design a cuttings re-injection operation.
• Be able to assess fracture containment and injection risk.
• Be able to specify monitoring and verification.
• Be able to compare disposal routes on cost and risk.

• Drilling engineers and well engineers
• Environmental and waste management staff
• Drilling fluids and solids control engineers
• Facilities engineers supporting drilling operations
• Regulatory and compliance staff
• Service company staff in waste management

Upon successful completion of this training course, delegates will be awarded an official Certificate of Completion issued by the Petroleum Engineers Association (PEA), an ISO 9001:2015 certified training organization. The certificate carries 10 Credits and formally records the total learning hours completed.

Each certificate is signed by the Course Facilitator and the CEO of the Petroleum Engineers Association, and serves as verifiable proof of professional training that delegates can present to employers and professional bodies worldwide.