144 Well Decommissioning Campaign

Project Overview

JJM personnel delivered a large-scale well decommissioning campaign for an Australian onshore operator exiting upstream operations. The program involved the plug and abandonment of 144 wells comprising both vertical fracture-stimulated wells and horizontal multi-lateral well types. The work required the development of comprehensive engineering designs, detailed planning and coordination of field execution activities to safely retire the wells and associated infrastructure while meeting regulatory requirements.

Project Details

• Location: New South Wales, Australia

• Industry: Coal Seam Gas

• Scope: Well Decommissioning, Plug and Abandonment, Field Decommissioning

• Role: Well Engineering, Project Management, Tenement Administration

Scope of Work

• Development of plug and abandonment engineering designs

• Procurement, tender and contractor management

• Regulatory interface and tenure administration

Key Challenges

• Sensitive urban location and complex regulatory environment

• Section milling of steel from mineable coal seams

• Remediation of surface casing vent flow

Outcomes

The campaign was completed by JJM personnel over a multi year schedule with zero HSE incidents on time and budget. The decommissioning involved remediation of number with free pipe and several wells with surface casing vent flow. The campaign was delivered with a year on year stair case improvement program to incorporate efficiencies and operational learnings.