PIPELINE AND WELL INTEGRITY MANAGEMENT

Lifetime assessment of pipelines and wells

Foto: BP - Valhall

FORCE Technology NORWAY AS

Speaker

Håkon Hallem FORCE Technology NORWAY AS

Head of Department Integrity Management

hahl@force.no

NORWAY

TRONDHEIM

Agenda

1)  FORCE Technology – Competence - Experience 2)  Pipeline and Well Integrity Management - Lifetime

assessment of pipelines and wells

Database for Wells, linking corrosion models together with actual operational data

Analysing of Well and Pipeline data by CorPos

(Software for corrosion assessment of both pipelines and wells)

Pipeline assessment by FiGS – Field Gradient Sensor

(coating defects and anode activity)

FORCE Technology - Experience

§  FORCE Technology can show one of the longest track-records regarding Integrity Management Projects and Services in the North Sea, Norway (long-term frame agreements) §  More than 20 years experience with Integrity Management

Projects §  More than 35 years experience with Integrity Services §  More than 70 years experience with testing and verification

of structures

FORCE Technology – Competence (1/2)

§  Material selection/ verification §  Cathodic protection (CP) §  Coating and surface protection §  Welding consultancy/ Certification §  Laboratory services (testing and analysis) §  Failure assessment

§  Design §  Reanalysis §  Modification §  Global and local analysis §  Verification

§  NDT Inspection §  Advanced Inspection §  NDT certification of inspectors and equipment §  Load/Response sensors §  Monitoring systems

INSP & MON

MATERI

AL

STRUCTURE

FORCE Technology – Competence (2/2)

§  Project Management §  Topside Corrosion Management §  Risk Based Inspection Planning §  Subsea and Pipeline Inspection Management §  Well Integrity Management (e.g. Wellhead fatigue) §  Maintenance Management

§  Well Integrity Management – How to combine data collection with corrosion analysis

§  Pipeline Inspections Management – Inspections and lifetime assessment of pipelines (Coating damages and CP status)

INTEGRITY

Maintain safety, optimise production and reduce downtime to support a sustainable production.

Well Integrity – Integrity Issues

§  Well Integrity is a global industry challenge. Harsh conditions and extended design life places greater demands to the integrity management of wells.

Wells with integrity issues

1) US Minerals Management Service survey, 2004. 2) SPE forum North Sea Well integrity Challenges, 2009. 3) Norwegian Petroleum Safety Authority, Well Integrity, 2006.

Gulf of Mexico North Sea, UK North Sea, Norway

6650 wells1 1600 wells2 482 wells3

FORCE Technology has developed a database (CMIS) for Wells - an application for Well Integrity Management. CMIS for Wells is a database linking corrosion models together with actual operational data, providing a platform for risk evaluation of wells.

INTERNET ACCESS DATA TRANSFER OFFSHORE

SERVER

PRODUCTION DATA

ANALYSING

Integrity and performance failures, due to corrosion 1)

1) OTM Consulting & Archer market survey 2010

Well Integrity – CMIS for Wells

A new way of collecting, treating, visualizing and distributing important well information to relevant personnel

Well Integrity – CMIS for Wells - Data

FLOW RATES BOTTOM HOLE WELL HEAD

Well Integrity – CMIS for Wells - Data

Production data

Well Integrity – CMIS for Wells - Analysing

Corrosion calculations visualised

Developed by FORCE Technology

Well Integrity – CMIS for Wells - CorPos

CorPos-AD – A Pipeline Integrity Management Tool §  Internal Corrosion Rate profile calculations based on fluid flow

analysis (OLGA®) and NORSOK CO2 corrosion model (MIC, H2S) §  Combines analysis with monitoring data or intelligent pigging

data (pitting information) §  Manages monitoring data, pig inspection data and inspection

data (findings, flaws). Compares the corrosion attacks (depth-length) with the ultimate limit state curve (ULS) based on DnV RP F-101.

§  Provides What-If analyses capability to view consequences of changes in the flow or environment parameters

Pipeline and Well Integrity – CorPos

PITTING

LEAKAGE

Pipeline and Well Integrity – CorPos – What is Pitting

Pitting corrosion is a form of localized corrosion that leads to the creation of small holes in the metal.

Residual lifetime ~11 years.

Future oil rate and conditions equal to the latest year

INPUT DATA OUTPUT DATA

PIGGING and INSPECTION

Pipeline and Well Integrity – CorPos – CASE STUDY

The worst corrosion attacks will develop further and the depth-length of the attacks will cross the ultimate limit state curve (red curve) after ~11 years provided equal conditions as the latest year.

PIT LENGHT

PIT

DE

PT

H

Residual lifetime >100 years.

Future increase of oil rate of 30% and conditions equal to the latest year

INPUT DATA OUTPUT DATA

PIGGING and INSPECTION

The worst corrosion attacks will develop further but the depth-length of the attacks are far from crossing the ultimate limit state curve (red curve) after 100 years provided equal conditions as the latest year. PIT LENGHT

PIT

DE

PT

H

WHAT-IF

Pipeline and Well Integrity – CorPos – CASE STUDY – “WHAT-IF”

A new way of collecting, treating, analysing, visualizing and distributing important well information to relevant personnel

Improved Corrosion Control Improved Process Control Increased Lifetime Reduced Safety Risk

Pipeline and Well Integrity – Summary

LIFETIME ASSESSMENT OF PIPELINES – CP INSPECTION BY FIGS

New Possibilities with Accurate Field Gradient Measurements

Pipeline Integrity - Key features - FiGS

FiGS (Field Gradient Sensor) is the only tool on the market of its kind. Through its superior sensitivity it is the ultimate tool for staying in control of your pipeline CP (Cathodic Protection) integrity: FiGS helps you to:

§  Detect coating damages on buried pipelines (e.g. pipes with Direct Electrical Heating ) and flexibles §  Achieve reliable data on anode output, coating damages, current drain and other operational parameters (Pipelines, Flexibles and Structures) §  Optimise CP retrofitting by using real data, offering substantial cost savings

Get an early warning on future problems and be able to take the necessary precautions

Pipeline Integrity - Key features - FiGS

Operation velocity of ~1 km pipeline pr hour

A coating damage of 3-5 cm² can be detected at 30 cm distance

Reference cell drift is eliminated by the rotation, yielding very high sensitivity

The detection limit of 0.1 µV/cm is way beyond any of the alternative methods

Measures the strength and direction of electric fields, enabling accurate calculation of anode and cathode current densities

Pipelines §  Detect coating defects §  Measure current output from anodes §  Measure on buried anodes and pipelines §  Use data as input to CP analyses and models

Flexibles §  Detect coating defects and exposure of tensile

armour/stress armour Structures

§  Reliably measure current density values §  Measure current output from anodes

§  Improved calculations of remaining life

§  Use data for calibration of CP models §  Use measured current density values in retrofit CP

design §  Measure current drain to buried structures like

wells, piles

Pipeline Integrity – Applications - FiGS

Pipeline Integrity – FiGS – CASE STUDY

Pipeline with severe trawl damage : A coated pipeline has repeatedly been impacted by trawls. Many anodes are missing and the coating is severely damaged. A CP retrofit is necessary.

§  What is the current requirement for retrofit? §  Are all the remaining anodes still connected to the pipe? §  What is the remaining life of the remaining anodes? §  What is the coating degradation along the pipe? §  When must the retrofit be carried out?

FiGS will provide the current profile, together with potential and coating damage data. This documents the current density values and the retrofit can be optimised with respect to installation time and cost

Pipeline Integrity – FiGS – Summary

FiGS can detect small coating damages at buried pipes and damages which are invisible to the naked eye at exposed pipes, enabling the operator to be proactive FiGS can measure current drain to buried structures like piles and wells and detect and quantify current leaks, e.g. through mooring systems FiGS can accurately measure current densities on structures and anodes, something which is particularly important when evaluating CP retrofitting FiGS is the only tool on the market of its kind and provides a means of solving many of your CP issues

FiGS helps you to stay in control

FORCE Technology NORWAY AS

Foto: BP - Valhall