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Part One: Overview: Introduction -- Production and active inventories -- Structure classification -- Installation and decommissioning activity -- Economic limit factors -- Reserves and resources. -- Part Two: Well trends and structure inventory: Introduction -- Well trends -- Shallow-water structure inventory -- Shallow-water economic limit statistics -- Deepwater structure inventory -- Deepwater economic limit statistics. -- Part Three: Decommissioning forecast: Introduction -- Methodology and parameterization -- Two examples [Tick and Ladybug; Horn Mountain] -- Shallow water decommissioning forecast -- Deepwater decommissioning forecast. -- Part Four: Critical infrastructure issues: Introduction -- Field development opportunities -- Benefits, costs, and risks -- Rigs-to-reefs programs. -- Part Five: Operating cost review: Introduction -- Offshore production facilities -- Operating cost characteristics -- Financial statements and other methods -- Field examples -- Factor models and production handling agreements -- Activity-based costing.

Intro -- Executive Summary -- Acknowledgment -- Abbreviations and Units -- Contents -- Part I: Background -- Chapter 1: Outer Continental Shelf Leasing -- 1.1 Regulatory Authority -- 1.2 Jurisdiction -- 1.3 Planning Areas -- 1.4 OCS Leasing Process -- 1.4.1 Five-Year Planning Program -- 1.4.2 Area-Wide Leasing -- 1.4.3 Available Acreage -- 1.4.4 Final Sale Notice -- 1.4.5 Lease Sale -- 1.4.6 Post-Lease Sale Review -- 1.4.7 Lease Award -- 1.5 OCS Revenue -- 1.5.1 Bonus Bids -- 1.5.2 Rent -- 1.5.3 Royalty -- 1.6 Lease Classification -- 1.6.1 Primary Term -- 1.6.2 Producing -- 1.6.3 Unitization -- 1.6.4 Suspension -- 1.6.5 Rejected and Canceled -- 1.6.6 Expired, Relinquished, and Terminated -- 1.6.7 Lease Consolidation and Segregation -- 1.7 Lease Sales -- 1.7.1 Acreage Available -- 1.7.2 Acreage Bid On -- 1.7.3 Rejection Rates -- 1.7.4 Acreage Awarded -- 1.7.5 Correlation -- 1.8 Activity Snapshots -- 1.8.1 Lease Activity, 2008-2013 -- 1.8.2 Lease Status Circa 2014 -- References -- Chapter 2: Life-Cycle Stages -- 2.1 Life-Cycle Stages -- 2.1.1 Exploration and Appraisal -- 2.1.2 Development -- 2.1.3 Production -- 2.1.4 Redevelopment -- 2.1.5 Decommissioning -- 2.2 Exploration -- 2.2.1 Geophysical Surveying -- 2.2.2 Exploratory Drilling -- Jack-Ups -- Semisubmersibles -- Drillships -- Tenders -- Offshore Supply Vessels -- Crewboats -- Helicopters -- 2.2.3 Appraisal Drilling -- 2.3 Development -- 2.3.1 Development Stages -- Concept Selection -- Detailed Engineering -- Execution -- 2.3.2 Offshore Cost Categories -- 2.3.3 Development Drilling -- 2.3.4 Subsea Systems -- 2.3.5 Shallow Water Structures -- Type -- Fabrication -- Installation -- 2.3.6 Deepwater Structures -- Type -- Fabrication -- Installation -- 2.3.7 Pipeline -- Type -- Fabrication -- Installation -- 2.4 Production -- 2.5 Decommissioning -- 2.5.1 Regulations -- 2.5.2 Stages.

Public companies in the United States are required to report standardized values of their proved reserves and asset retirement obligations on an annual basis. When compared, these two measures provide an aggregate indicator of corporate decommissioning risk but, because of their consolidated nature, cannot readily be decomposed at a more granular level. The purpose of this article is to introduce a decommissioning risk metric defined in terms of the ratio of the expected value of an asset's reserves to its expected cost of decommissioning. Asset decommissioning risk (ADR) is more difficult to compute than a consolidated corporate risk measure, but can be used to quantify the decommissioning risk of structures and to perform regional comparisons, and also provides market signals of future decommissioning activity. We formalize two risk metrics for decommissioning and apply the ADR metric to the deepwater Gulf of Mexico (GOM) floater inventory. Deepwater oil and gas structures are expensive to construct, and at the end of their useful life, will be expensive to decommission. The value of proved reserves for the 42 floating structures in the GOM circa January 2013 is estimated to range between $37 and $80 billion for future oil prices between 60 and 120 $/bbl, which is about 10 to 20 times greater than the estimated $4.3 billion to decommission the inventory. Eni's Allegheny and MC Offshore's Jolliet tension leg platforms have ADR metrics less than one and are approaching the end of their useful life. Application of the proposed metrics in the regulatory review of supplemental bonding requirements in the U.S. Outer Continental Shelf is suggested to complement the current suite of financial metrics employed.