Plugging methane-emitting orphaned oil and gas wells can generate carbon credits where projects meet registry requirements. Credit revenue can help fund site assessment, emissions measurement, plugging and verification. Project economics depend on eligible methane reductions, execution costs and the price buyers will pay for issued credits.
How well plugging creates carbon credits
Orphaned wells lack an identifiable or financially responsible operator to handle closure. Some continue leaking methane and fluids, creating risks for the climate, groundwater and surrounding land.
A crediting project measures methane emissions, establishes an eligible baseline and documents the reductions achieved through plugging. Independent verification supports registry issuance. Finding an abandoned well is only the starting point: orphan status, additionality, measurement quality and project rights determine whether a credible crediting pathway exists.
Check the methodology before committing capital
ACR’s orphaned-well methodology became inactive on May 9, 2025, while the registry develops version 2.0. ACR’s published notice allows projects with approved Methane Measurement Method Approval Forms to complete verification under version 1.0.
ACR continues accepting project listings, but new projects and existing projects without those approvals must satisfy the updated methodology. Previously verified projects and issued credits retain their status. Developers should confirm the applicable requirements and transition arrangements before scheduling fieldwork.
The development process
- Screen the wells. Establish orphan status, site access, available records, plugging obligations and ownership of the potential carbon benefits.
- Assess eligibility and funding. Review additionality, public funding, prior activities and the applicable registry rules.
- Measure methane. Use an accepted measurement protocol, document baseline emissions and retain calibration records and supporting field data.
- Complete plugging and restoration. Engage qualified contractors, obtain required permits and preserve engineering records and completion evidence.
- Verify and issue credits. Complete the required monitoring, submit project documentation and address independent verification findings before registry issuance and sale.
What determines commercial viability?
A project budget needs to capture more than the plugging contract. Field surveys, measurement campaigns, permitting, site access, verification, registry charges and ongoing obligations all affect the margin available from credit sales.
- Creditable volume: eligible methane reductions after methodology adjustments and project emissions.
- Execution cost: well depth, condition, geology, equipment access and remediation requirements.
- Working capital: expenditure incurred before verification, issuance and buyer payment.
- Buyer terms: agreed pricing, delivery conditions, payment timing and responsibility for issuance shortfalls.
A useful feasibility model tests lower credit volumes, higher plugging costs and delayed issuance. Any proposed prepayment or offtake should be assessed against those scenarios.
Preparing a project for review
Start with a well inventory, location and ownership records, orphan-status evidence, available emissions data, contractor estimates and details of public funding received or sought. These documents support an initial assessment of eligibility, development cost and the route to credit issuance.
FG Capital Advisors’ carbon project advisory supports feasibility assessment, methodology selection, project documentation and commercial structuring. Early review helps identify the evidence and funding required before substantial development expenditure.
