Project Support

Consulting & Specialized In decommissioning liability

We use a variety of methods, including probability-based risk assessment, which is a TSB specialty, to provide our clients with realistic assessments of abandonment project scope, schedule and current and future cost. In addition, we help clients understand how to control future decommissioning liability through innovative options.

Our liability estimates, which utilize our proprietary PAES® (“Platform Abandonment Estimation System”), set the standard for oil and gas divestitures and acquisitions. In fact, the term “TSB liability estimate” is part of the industry lexicon.

  • Decommissioning Liability Assessments
    • Offshore and Onshore Oil and Gas Assets (upstream & downstream)
  • Asset Retirement Obligation (ARO) Assessments
  • Benchmarking Database Services
  • Cost and Schedule Risk Assessment
  • Acquisition and Divestiture Support
  • Regulatory Assistance
  • Detailed Industry Studies
  • Bonding Support
  • Liability Estimates
  • Asset Inventory
  • Replacement Cost Estimates
  • Disposal Options
  • Planning for Removal of Unique Structures
  • Expert Witness Testimony
  • Planning for Deep and Ultra-Deep Water
  • Due Diligence

Asset Retirement Obligation (ARO)

The “Platform Abandonment Estimating System (PAES®) is used for most of the liability estimates executed by TSB.
  • Software developed in the early 1990’s for Tax Litigation to provide detailed estimate documentation
  • Upgraded regularly, most recently in 2018
  • Further updates currently underway, including SAAS (software as a Service capability).
Primarily used to develop “Asset Retirement Obligation” (ARO) estimates, but provides detailed documentation of assumptions.
Scope of Services that fit the capability of a typical PAES® study include:
  • Risk Assessment
  • Acquisition and Divestiture Support
  • Bonding Assistance
  • Regulatory Assistance
  • Expert Witness support (O&G Companies & Government Agencies)
  • Third Party support to Insurance Adjustors, Attorneys & Investment Companies
Provides an Estimate & Resource Cost Database going back to 1994 covering more than 4000 facilities worldwide.


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