Capabilities Offshore Pipelines

Offshore Pipelines Capability and Experience

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Capability Overview As an industry leader in deepwater

pipeline technology, INTECSEA

assists operators worldwide with

unique solutions to hydrocarbon

production and transportation

system needs.

INTECSEA designs and manages

offshore pipeline projects, leading

the industry in the execution of

ultra-deepwater marine pipeline

projects.

INTECSEA’s extensive project

experience includes practical

design and installation knowledge

required for cost effective

completion and operation of marine

pipeline facilities in all

environments. In addition to

industry-leading deepwater pipeline

applications, INTECSEA has also

been responsible for many long

distance, large diameter

transmission pipeline projects and

conventional offshore platform-to-

platform pipeline projects.

Services

Technical and Economic Studies

Route Selection and Survey Supervision

Preliminary and Detailed Design

Field Development Engineering

HP/HT Pipeline Engineering

Arctic Pipeline Engineering

Insulated Pipe-in-Pipe Engineering

Deepwater Subsea Flowline

Engineering

Pipeline Repair Engineering

Materials and NDT Engineering

Project and Construction Management

Maintenance Management and

Operations Assistance

Route Visualization with Fledermaus

100,000 km

of pipelines

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Engineering Services

Conventional Pipeline Design

Preliminary and/or detailed submarine pipeline design generally includes design

basis document, safety schematic, pipeline flow assurance and line sizing, pipeline

route selection, geohazard analysis, pipeline route alignment drawings, on-bottom

stability analysis and determination of weight coating and/or trenching

requirements. INTECSEA also determines wall thickness and steel grade using

traditional or limit state design criteria and associated mechanical design. Other

services include; pipe spanning analysis and determination of pipe support

requirements and design, risk study and definition of remedial measures as well as

pipeline installation studies to verify alternative installation options.

Long Distance and Deepwater Pipeline Design

The design of long distance and deepwater pipelines encompasses most of the

fundamentals of conventional pipeline design. However, several additional aspects

warrant a thorough and rigorous level of engineering. The design of long distance

and deepwater pipelines require particular attention to flow assurance to maintain

deliverability and to prevent or mitigate the formation of hydrates, paraffin and/or

asphaltenes. Furthermore, the system design effort must consider the capabilities

and requirements for all parts of the system throughout the entire service life.

Pipeline routing is a major factor that can directly influence the cost and feasibility

of a pipeline project. Design of large-diameter, deep water pipelines requires

intimate knowledge of the relevant failure mechanisms, material behavior, pipe

fabrication processes and installation limitations. INTECSEA continues to lead the

industry to extend the limits of pipeline design for deep water through extensive

full-scale testing programs and close cooperation with the code developers, pipe

mills and construction contractors.

Production Flowline Design

There are several important issues related specifically to (HT/HP) field

developments. These include thermal expansion, pipeline/flowline lateral or

upheaval buckling, stress/strain localization, corrosion protection systems, flowline

and component material selection and flow assurance. As many of these issues

are interdependent, a clear understanding of the limitations, interaction and

interdependency is required to develop a robust and reliable system design.

INTECSEA’s experience and understanding of the issues and solutions provides a

cost effective, fit-for purpose design. INTECSEA has extensive expertise in the

design of flowline systems for HP/HT applications including Pipe-in-Pipe and

Bundled Flowlines, Externally Insulated Flowlines and Flexible Pipe Flowlines.

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Pipeline Shore Crossing Design

The shore crossing design for a pipeline system is a combination of site selection

and design activities required to maintain pipeline stability and integrity while

minimizing impact to environmentally sensitive areas and adjacent property or

facilities. Key activities include site selection, design basis definition, pipeline

stability analyses, operational requirements and construction methods. A thorough

and rigorous degree of engineering is often warranted in view of the potential for

significant construction cost reduction and operational reliability of the pipeline

system. INTECSEA’s technical expertise and involvement in a wide range of shore

crossing designs provide the basis for implementing a cost-effective design.

Shore Crossing Construction Methods

Different construction methods are evaluated to define the resultant trench cross

sections. Dredging (hydraulic and conventional), directional drilling, drilling and

blasting, mechanical trenching, jetting and plowing techniques are considered in

conjunction with seabed soils data to determine method suitability. Shore crossing

installation methods and equipment, including pipe pull, pipelay, horizontal

directional drilling and/or a combination of these methods, may be evaluated. Pipe

weight, stiffness, pulling requirements, bathymetry and shore crossing length are

considered for each installation method. In addition, selection of the optimum

construction methods and, the availability of the required construction equipment

must also be considered. In some cases the preferred method may not be cost

effective due to lack of availability and/or high mobilization costs. Vessel draft

limitations in the shore approach may also limit the type of trenching/dredging and

pipeline construction equipment which can be used.

Pipeline Shore Approaches

INTECSEA has extensive experience in the design and construction of pipeline

shore approaches. Our design approach extends well beyond the basic

mechanical design of the shore approach and includes geotechnical engineering

and marine geology aspects as well. As a world leader in pipeline design and

construction management, INTECSEA has had the opportunity to showcase this

experience on a number of challenging projects for which shore approach studies,

design and/or construction was a part

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Project Experience Project: Mica Flowline Client: ExxonMobil Phases:

Gulf of Mexico, USA

Preliminary and detailed engineering design of the production flowlines and associated risers

The Mica Field is located in Mississippi Canyon Block 211 in the Gulf of Mexico, approximately 100 miles south of Mobile Bay, Alabama in water depth of 4,350 ft. Two 28 mile long production flowlines (an 8-inch x 12-inch pipe-in-pipe insulated flowline and an 8-inch uninsulated flowline) will transport hydrocarbons from a subsea manifold to the BP Pompano platform in Viosca Knoll Block 989. The Pompano platform is located in a water depth of 1,300 ft. The two flowlines terminate at the top of a single existing J-tube on the Pompano platform, and are linked via a pigging loop at the subsea manifold to enable round trip pigging operations.

Project: Algeria to Spain Gas Pipeline Client: MEDGAZ Phases:

Mediterranean Sea

Front-end engineering design, pipeline design and preparing the EPIC (engineering, procurement, installation and commissioning) bid packages

The MEDGAZ project comprises 200 km (124 miles) of dual 24-inch high-pressure ultra-deepwater gas pipelines, designed to deliver as much as 16 billion m3/year of Algerian natural gas under the Mediterranean Sea to Spain and other European markets from Beni Saf, Algeria, to a landfall at Playa del Charco, near Almeria, Spain.

The lines included shore approaches and short onshore pipeline sections connecting onshore terminals at each end of the pipelines. The pipelines traverse a maximum water depth of 2,160 m (7,087 ft).

Project: Mobile Bay Client: ExxonMobil Phases:

Gulf of Mexico, USA

Detailed design included routing, flow assurance, pipeline & riser design, cost estimates and schedule and constructability – also supported procurement of line pipe, coatings and prepared bid packages for installation

The Mobile Bay project included detailed design of a new 8-inch flowline from an existing well template (AB) to a production platform (A) in Mobile Bay, Alabama. The flowline crosses the 45-feet deep ship channel and is installed approximately 30 feet below the channel using the horizontal directional drilling (HDD) installation method. The flowline transports sour hot gas at approximately 200 degrees F.

IDENTIFY EVALUATE DEFINE EXECUTE OPERATE



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Project: Horn Mountain Pipeline Client: BP Phases:

Gulf of Mexico, USA

Conceptual design, preparation of survey data and survey supervision, FEED and detailed design

The BP Horn Mountain Field Development is located 84 miles offshore in Mississippi Canyon Block 126 and 127 of the Gulf of Mexico. The field has been developed with a SPAR-based production facility. The gas export pipeline extends approximately 41 miles to a fixed platform in 300 ft water depth in Main Pass 260, and the oil pipeline extends approximately 36 miles to a fixed platform in 414 ft water depth in Main Pass 289.

INTECSEA performed an engineering study for BP (VASTAR) to determine design fundamentals for the export pipeline system, prepared project cost estimates, and prepared specifications for inclusion in ITB packages. INTECSEA also prepared ITB packages and evaluated material and construction bids. Following completion of the front end engineering design, INTECSEA was awarded the detailed design contract for the export pipelines and risers.

Project: Guanabara Bay PE-3 Pipeline Client: Petrobras Phases:

Guanabara Bay, Brazil

Perform preliminary and detail engineering for the PE-3 pipeline project

PETROBRAS plans to install a new 18-inch diameter Heavy Fuel Oil (HFO) pipeline, designated PE-3, to replace the existing 16-inch diameter PE-2 (HFO) pipeline. The overall PETROBRAS objective for the PE-3 pipeline was to design a world-class pipeline system to transport refinery products from the facility at REDUC to loading piers. Protection of sensitive environmental resources, safety, and protection of the public property were of utmost importance and primary goal of the design.

Project: Iroquois Pipeline Extension Client: Iroquois Gas Transmission Operating Company Phases:

New York, USA

All design activities for the marine section of the pipeline, and technical support for the application of the FERC permit

INTECSEA was selected to manage a survey across Long Island Sound, and design a 24-inch high pressure gas pipeline for Phase 1 FERC permit application. The pipeline was brought ashore close to the Bronx and Westchester, NY county lines, and ties into the existing Con-Ed power facilities in New York. The route crossed shorelines with densely populated residential areas, a heavily used shipping lane and fishing areas. The offshore geology was complex and variable, with boulder-laced glacial fills and rock outcrops. The marine survey was planned and supervised by INTECSEA.

In June 2000, INTECSEA was awarded the detailed engineering design of the Eastchester Pipeline Extension Project which included continued permit application support and construction cost estimating. In addition, INTECSEA worked closely with an environmental consultant to evaluate and assess the project’s environmental impact during pipeline engineering, construction and operation.




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Project: Blue Stream Pipeline Project Client: Gazprom Phases:

Black Sea, Russia

Performed front end engineering design and detailed design for the gas transportation system

The Blue Stream Pipeline Project is a gas transportation system for delivery of processed gas from the gas grid in Southern Russia, across the Black Sea to Ankara, Turkey. The Blue Stream Project includes two 24-inch offshore pipelines, which traverse a route from Djubga, Russia to a landfall east of Samsun, Turkey. The pipelines are approximately 390 kilometers long and are installed in water depths to 2,150 meters.

Significant technical challenges addressed by INTECSEA in the design included:

design of 24-inch pipe in 2,150m water depth including full-scale collapse testing

extremely rough seabed with significant geohazard potential

external sour (H2S) environment

Project: South Stream Client: Gazprom Phases:

Black Sea, Russia

Feasibility study, materials testing program, survey supervision and FEED

Following on the from the Blue Stream project, INTECSEA was awarded the feasibility study for the South Stream pipeline project in the Black Sea. South Stream will comprise up to four pipelines between the Russian coast at Anapa and a landfall in either Bulgaria or Romania. Each pipeline will be 32-inch diameter and approximately 900km in length. With water depths along the route of up to 2200m, this represents a further extension of industry capability. INTECSEA scope for South Stream started with a feasibility study and continued into an extensive full-scale materials testing program. INTECSEA has also supervised the detailed marine surveys performed along the pipeline route and at the landfalls. INTECSEA initiated FEED for South Stream in early 2012.

Project: BP Angola Block 31, PSVM Development Client: Heerema Marine Contractors Phases:

Offshore Angola, Angola

Detailed design and package engineering for flowlines, subsea structures, spools and risers

The PSVM project for HMC involved comprehensive design engineering services, from tender support through to detailed design and construction support. In addition to detailed design of multiple HTHP pipe-in-pipe production flowlines, 24 substantial subsea structures and 30 complex deepwater spools, INTECSEA also seconded Package Engineers to oversee delivery of critical riser and flowline elements.

The subsea development features 48 subsea trees in 2000m water depth, connected through 13 manifolds, 100 miles of carbon steel flowlines, and 9 hybrid risers to a turret-moored FPSO.




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Project: Stolt Bonga Field Development Client: Shell Phases:

Warri, Nigeria

Layout of the infield flowlines and gas export pipeline route selection. Flow assurance of the gas export pipeline and water injection flowlines

The Bonga Field is located southwest of Warri, about 120 km offshore Nigeria in approximately 1,100 m water depth. The development includes a permanently spread moored FPSO, to which ten 10-inch and 12-inch diameter pipe-in-pipe production flowlines will transport multi-phase hydrocarbons from subsea wells via eight production steel catenary risers (SCRs).

The project was awarded on a lump sum basis, with INTECSEA working in close co-operation with Stolt Offshore’s engineering, procurement and construction personnel.

Project: Hasdrubal Pipelines Client: BG Tunisia Phases:

Offshore Tunisia, Tunisia

Provided detailed design and procurement services for the mulitphase and gas export pipelines.

The Hasdrubal Field is located in Tunisian offshore waters approximately 100km from the coast, in the Gulf of Gabes. The Hasdrubal development consists of a normally unattended wellhead platform in around 60m of water. The platform is connected to a new onshore terminal, located alongside the existing BG Hannibal terminal, by a 109km long 18'' multiphase pipeline.

Due to the high product temperature (140c), the riser and first 10km of the pipeline is CRA lined to prevent corrosion. In order to aid temperature loss in the system, the riser has been externally coated using TSA. Midline expansion spools have been included in the first 10km in order to mitigate the risk of lateral buckling. This section is also susceptible to pipeline walking, which has been mitigated against through the use of spool concrete protection covers, which also act as anchors.

Project: Rosetta Project Client: Burullus Phases:

Assisted in evaluating field development options and supported their steps through the concept selection process, FEED and detailed design

Rosetta Phase III and South Sequoia developments and Rosetta Infill wells are located in the eastern Mediterranean Sea; offshore Egypt in a maximum water depth of approximately 235m.

The initial Phase I development of the Rashid field consisted of a 6-well platform development of the Rashid-1 accumulation and a 24" NB export pipeline to shore. Phase II of the Rosetta field development was commissioned during 2005 to exploit the Rashid-2 (P2) accumulation. The produced gas was evacuated to a not-normally-manned (NNM) platform, P2 and exported to the P1 platform by means of a 20" NB multiphase infield pipeline, via the existing 18" NB P1 riser. The Phase III development comprised a single subsea well and manifold, two wells (1.6km apart), a 5km 22" NB pipeline, and a 5km 22" NB pipeline.




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About INTECSEA (click here to learn more about INTECSEA)

For more than 25 years, INTECSEA has provided

frontier technology leadership for the energy

industry’s most challenging offshore field

development and pipeline projects.

INTECSEA was formed in 1984 and provides design

for floating systems, risers, pipelines, and subsea

engineering and construction management services

within the global WorleyParsons Group. INTECSEA

has established operating offices in Houston, London,

Perth, Kuala Lumpur, Singapore, Delft, Melbourne,

Rio de Janeiro, Jakarta, Luanda, Cairo, St. John’s,

Aberdeen, and Accra. (see map of INTECSEA locations)

INTECSEA’s major areas of expertise include

deepwater subsea and floating production systems,

marine pipeline and riser systems, Arctic pipelines,

marine terminal systems, and Arctic structures.

Additional areas of expertise include flow assurance

and operability, marine surveys, marine operations,

and offshore equipment design.

A History of Innovation and Benchmark

Achievements… SUBSEA

Deepest Subsea Production Longest Oil Tieback Longest Gas Tieback First Subsea Allocation Flow Meters First 15,000 psi Subsea Trees First Electrically Heated Pipe‐in‐Pipe Flowlines Deepest Multiphase Subsea Pumps First Super Duplex Umbilical First Diaphragm Chemical Injection System

MARINE PIPELINES

Deepest S‐lay Pipeline Deepest J‐lay Pipeline Longest Offshore Pipeline First Offshore Arctic Pipeline First Arctic Pipeline Leak Detection System First Piggable Wyes

RISERS

First Pipe‐in‐Pipe Steel Catenary Riser First Reeled Steel Catenary Riser Deepest Steel Catenary Risers Most Shallow Catenary Riser Largest Diameter Flexible SCR Joint First SCRs on an FPSO Most Direct Vertical Access Risers First GOM Free‐Standing Riser

FLOATING SYSTEMS

Largest FPSO Deepest TLP at Time of Installation Deepest SPAR at Time of Installation Most Installed TLPs First Deepwater FPU Operated with a Drilling

Tender Most Types of Floating Systems

(for more capabilities information click here)

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Global Reach, Global Solutions,

Local Delivery

For further information about

our global capability, email

[email protected]

www.intecsea.com

Documents

Capabilities Offshore Pipelines