Seminaret ble holdt på BP Helios Plaza building i Houston den 29. april. Omlag 60 personer deltok, og fikk høre på 15 forberedte presentasjoner fra både offshorenæringen selv, samt universitets-, forsknings- og rådgivningssektoren. Presentasjonene belyste samspillet mellom jord og rørleding (soil-structure-interaction) med hovedvekt på lateral respons fra den omkringliggende jorda rund røret og effekten av forskjellig dimensjonering av rør og brønnring.

NGIs adm. direktør, Lars Andresen, Victor Taboada, lederen ved NGI Houston, ønsket velkommen til seminaret (bildet over), ga en kort oversikt over NGI og offshore forskning. Seminaret var inndelt i tre sesjoner (se programmet, med liste over deltakere), med individuelle presentasjoner, som vist nedenfor. Tilgjengelige presentasjoner kan lasts ned.

Session 1

Ed Clukey

Jukes Group

A perspective on geotechnical related drilling issues.
Relationship between hydrostatic pore pressure and fracturing pressure and scenarios on the effect of sand bands in jetted conductors (without casing).

Bob Gilbert

UT Austin

Applicability of existing p‐y curves (API Curves) ‐ update on current research and findings.
Research on laterally loaded piles and improvement to the more conservative design standards.

Partha Charma

DNV GL

Soil modelling aspects for wellhead fatigue.
Coupling and de-coupling design methods referred to in DNV standard RP 0142, and comparison of results from cyclic loading effect.

Atul Ganpatye

Stress Engineering

The impact of soil modeling on well integrity assessment ‐ a system‐level‐perspective.

 

Session 2

Arash Zakeri

BP America

Experience in recent developments and results with field monitoring.

Max Russo

Kongsberg Maritime

Measured loads on installed conductors vs analytical predictions for different soil models.

Charles Aubeny

Texas A&M

True non‐linear spring model for lateral support of conductors.

Bulent Mercan

2H Offshore

Subsea Wellhead and Conductor Fatigue Drivers.

John Brand

Intecsea

An integrated approach to assessment of conductor zone hazards and installation methods for deepwater areas.

Session 3

Kim Mittendorf

Vulcan

Mitigation and control of wellhead fatigue.
Including soil-structure interaction, damping and boundary conditions. Monitoring and instrumentation, and measured fatigue damage versus design calculations were also discussed.

Hendrik Sturm

NGI Oslo

Development and testing of a new p‐y model test device for conductors.
Scaled p-y soil-conductor model and calibration with a numerical FE model. The current NGI research also models cyclic loading and consolidation due to pore pressure dissipation.

Youhou Zhang/
Noel Boylan

NGI Oslo

Monotonic and cyclic p‐y curves for clay based on soil performance observed in laboratory element tests.

Brian Carlton

NGI Oslo

State‐of‐Practice and ongoing research to estimate conductor setting depth in clay and sands.

Alireza Mirdamadi

NGI Houston

Prediction of pore pressure for tophole well integrity.
The prediction of pore pressure behavior is important in well drilling window assessment.

Tom Bauer

Intermoor

Low‐Cost installation method for deepwater conductors.
Conductors using piles has been used successfully at several sites offshore Brazil.