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Minerals Management Service

TAP-620-Collection and Archival of Environmental Data Relevant to Design of Arctic Structures

The primary objectives of this project are to (1) consider the full suite of environmental data (meteorological and oceanographic) and structural performance data that could be collected during exploration and production operations off the coast of Alaska, and review each type of measurement in terms of its potential value to the design of future offshore infrastructure; and (2) assess alternatives and develop a recommendation for how MMS should go about collecting, archiving and processing this data.

The project will be accomplished via the following tasks:

TAP-619-An Interactive Met-Ocean Geographical Information System (GIS) with Applications for Data Query and Statistical Analysis

The objective of this project is to develop a geographical information system (GIS) for met-ocean data which allows the user to interactively query and update data.

A 2-year project is anticipated. Current funding is for first year only, and the accomplishment of the following tasks:

TAP-618-Comparative Study of Offshore Wind Turbine Generators (OWTG) Standards

The objective of this project was to conduct an engineering study that addressed the requirements for standards that are suitable for the design of OWTGs in U.S. federal waters. This study reviewed the applicability and merits of at least two sets of standards that are relevant to offshore wind power development. These standards were the API recommended practice that is currently used for the design and regulatory review of structures used for oil and gas development in the U.S.

TAP-612-Analysis of Conservatism in Offshore Foundation Design

The objectives of this project were to identify and analyze the factors that may contribute to the apparent conservatism in fixed-structure foundation design and to provide guidance on how to incorporate this information into design standards. The research consisted of four tasks:

Task 1. Qualitative Analysis: Compile, analyze and summarize available data for platforms where the foundation unexpectedly survived hurricane loading in Andrew, Lili, Ivan, Katrina, or Rita.

TAP-609-Reliability vs. Consequence of Failure for API RP2A Platforms Using RP2MET

Energo examined the structural reliability of a set of approximately 15 GOM platforms of different configurations, water depths and locations. This set was meant to represent a typical cross section of the GOM fleet of fixed platforms. The resulting platform reliabilities were compared based upon metocean criteria used - RP2A or 2INT-MET and by region. The results will allow MMS to better understand the impact of the new API criteria on expected platform performance according to design approach used and location in the GOM.

TAP-608-Methods to Reduce Lateral Noise Propagation from Seismic Exploration Vessels

The technical effort will focus on discovering and validating by proof-of-concept testing a reliable cost-effective method or methods and equipment to significantly reduce lateral noise in the marine environment from seismic activities and operations. This research project was conducted in two parts.

Part 1 of this project contained six tasks:

TAP-606-Hybrid Well Riser Risk of Failure and Prevention

The objective of this study was to examine the cause and probability of potential riser failures from operations through existing single and dual production risers with a surface BOP.

Task 1: A literature and industry survey to assess the operational frequency of use of surface BOPs for workover operations from floating production systems through existing single and dual Top Tensioned Riser (TTR) systems.

TAP-604-Evaluation of Fatigue Life Models and Assessment Practice for Tension Leg Platforms (Phase 1: Tendon System Fatigue)

The objective of this project is to evaluate the state of practice in fatigue assessment in the offshore industry today. Of interest is an understanding of how fatigue life calculations are undertaken and how both load and resistance side uncertainties are employed in design for fatigue.

This objective will be accomplished via the following tasks:

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