Tombua Landana.pdf

7/21/2019 Tombua Landana.pdf

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Chevron Africa and Latin America

Exploration and Production Company

Cabinda Gulf Oil Company Ltd.

Av. Lenine, n 77

C.P. 2950

Luanda

Repblica de Angola

Tel. +244 222 692600

Fax +244 222 394348

2009 Chevron Corporation. All rights reserved.

CBRES/IDC 057221 07/09

IIF and Incident- and Injury-Free are trademarks of JMJ Associates, LLP,

and Human Energy is a trademark of Chevron Corporation.

Tombua Landana

International Partnership ProducesOne of the Worlds LargestStructures Offshore Angola


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3| Tombua Landana 2009 Tombua Landana 2009 | 3

Tombua Landana

...and one of our new neighbors

We are dedicated to our core business of

helping meet the worlds energy needs,

while sustaining a record of environmental

excellence and commitment to safe and

environmentally responsible operations.

2 | Tombua Landana 2009

Harnessing the Power of

in the Tombua Landana Project

At Chevron, the commitment of our employees enables us to

provide the energy resources to drive progress around the world.

This is Human Energy, a declaration that we are in the energy

business to produce positive outcomes for people, communities,

and the world.

Human Energy also sets the stage for what we do and how we do

it. It stands for people tapping into their strengths and working

together to deliver the energy that fuels human progress. In

Angola, Human Energy drives the Tombua Landana project, an

international partnership to provide energy to fuel economic

growth and prosperity.

Human Energy


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The Tombua Landana project is

located in approximately 1,200 ft

(366 m) of water offshore Cabinda,

Angola, West Africa, in Block 14.

Cabinda Gulf Oil Company (a whollyowned subsidiary of Chevron

Corp.) operates the project with

a 31% interest.

Partners include:

Sociedade Nacional de

Combustiveis de Angola P&P

(Sonangol) (20%)

Eni Angola Exploration B.V. (20%)

Total E&P Angola (20%)

GALP-Explorao e Produo (9%)

Tombua Landana, Chevrons third

deepwater development in Angola,started with development and

production from the Landana North

reservoir in 2006 and continued in

2007 with pre-drilling of the Tombua

and Landana central reservoirs.

Subsurface Description

The Tombua and Landana fields,

discovered in 1997 and 2001 by the

Tombua-1 and 14-6X/6XST1 wells,

respectively, lie in the eastern part

of Block 14 and cover over 164mi2

(425 km2) in water depths of 900

ft to 1,700 ft (274 m to 518 m).

Geographically, they are situated just

south of the Lobito Field and north of

the Gabela oil discoveries.

The Tombua and Landana reservoirs

are composed of high-quality sands

deposited in a deepwater slope valley

environment on the northwestern

flank of the Congo River fan. The

identified resource base has oil in

place of over 1.0 billion barrels, held

by a combination of structural andstratigraphic traps. The development

plan is designed to manage reservoir

complexity, resource uncertainty,

and technical challenges. There are

11 reservoirs to be developed by the

initial project.

Many of the reservoirs are very near

their bubblepoints, making pressure

maintenance vital to maximum

recovery. Therefore, there will be

water injection at or near the start

of production. The Tombua Landana

reservoirs contain high levels of

barium in the produced water,requiring special seawater treating

equipment to remove sulfates from

the seawater before injection to

prevent formation of barium sulfate

scale in the wellbores and production

equipment. Tombua Landana will

also use produced water reinjection

for pressure support and to reduce

the volume of seawater required to

waterflood the reservoirs.

In late 2008, Chevron installed

a compliant piled tower (CPT) to

support a drilling and production

platform (DPP)the second such

tower in Angola and one of thelargest man-made structures

on earth. Platform production

is expected in the third quarter

of 2009 and will reach a daily

production rate of 100,000 barrels

of crude oil by 2011.

Two subsea manifoldsone a

seafloor collection center for

production and the other a water

injection distribution point for

injection wellswill tie back to the

DPP to produce reservoirs and

provide injection water for wells

that cannot be reached from

the platform.

Subsurface dataincluding

3-D seismic, multiple reservoir

penetrations, well tests, and wireline

logs and corehave been acquired. To

predict the reservoirs performance,this data has been incorporated into

3-D geologic and simulation models

using state-of-the-art technology.

Tombua Landana Project Overview

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Partnerships Worldwide4, 5 Europe

6 Vlissingen, The Netherlands

7 Paris, France

8, 9 Lobito, Angola

1 Houma, Louisiana

2 Channelview, Texas

3 Ingleside, Texas

10 Okp o, South Korea

1 Houma, Louisiana, USA

Top Tower Section (TTS)Fabrication

Gulf Island Fabricators

3 In gleside, Texas, USA

Tower Bottom Section (TBS)Fabrication

Gulf Marine Fabricators

4 Europe

Subsea Installation Contractor

Subsea 7

8 Lobito, Angola

Drilling Template Fabrication

Sonamet

2 Chan nelview, Texas, USA

Living Quarters

Delta Engineering

5 Europe

Subsea Equipment Vendor

Vetco Gray

6 Vlissingen , The Netherlands

Tower Base Template (TBT) andFoundation Piles Fabrication

Heerema

10 Okpo, South Korea

Topsides Fabrication

DSME

7 Paris, France

Export Pipelines

Acergy

9 Lobito, Angola

Leveling Pile Template (LPT)and Leveling Pile (LP) Fabrication

Sonamet

The following companies were awarded project contracts:

Daewoo Shipbuilding & Marine Engineering Co., Ltd. (DSME)

Subsea 7 Installation Ltd.

Acergy West Africa SASU

Vetco Gray U.K.

Additional contracts included the Mobile Offshore Drilling Unit (MODU) to

pre-drill platform wells and the Tombua South and Landana North subsea

wells, the tender-assisted drilling rig (TAD) for drilling and completing all

platform wells, the design and fabrication of the drilling template, and the

provision of inspection services.

PartnershipsThe projects contracting

strategy consisted of

using four engineering,

procurement, construction,

and installation (EPCI)

contracts to supply the

platform, subsea flowline

and equipment installation,

the export pipelines, and

the subsea equipment.



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Project Execution

Platform and Tower Contract

The 35,300-short ton (operating

weight) Tombua Landana platform

is composed of a large integrated

deck with production facilities and a

120-person accommodation building

supported by a 56,400-short toncompliant tower. The tower, a four-

leg configuration, is secured to the

seafloor by twelve foundation piles.

The platform will provide a drill-deck

for access to 38 well slots and be

capable of simultaneous production

and drilling operations with a TAD rig.

The EPCI contract for the drilling

and production platform, including

the supporting CPT, was awarded to

DSME in July 2006. Kellogg Brown

& Root, Houston, Texas, performed

detailed engineering for the topsides

while Mustang Engineering, also

in Houston, provided detailed

engineering for the CPT. Fabrication

of the platform components for

the pre-drilling template started

in December 2006, at Sonamets

facility in Lobito, Angola. Fabrication

of the tower base template began

in February 2007, at Heerema

Vlissingen in The Netherlands.

Fabrication of the topsides modules

started in August 2007, at Daewoos

yard in Okpo, South Korea. Work on

the two compliant tower sections

began at Gulf Marine Fabricators

in Ingleside, Texas, and Gulf Island

Fabricators in Houma, Louisiana, in

January 2007. Installation work was

performed in Angola by Heerema

Marine Contractors, with hookup and

commissioning performed by DSME.

Operation of the new platform will be

handled by Cabinda Gulf Oil Company

personnel. The first installation

phase of the CPT (the tower bottom

template and the foundation piles)

was completed in February 2008.

Tombua Landana 2009 | 9

Export Pipelines Contract

The EPCI contract for the export

pipelines was awarded to Acergy

West Africa SASU in September

2006. The purchase order for the

oil and gas export line pipe was

placed in February 2007. The gas

export and the oil export pipelines

were installed by Acergy in January

and February 2008. The gas export

pipeline (14-in. (3 6-cm)) diameter,

19-mi (31-km) length ties in to the

Benguela Belize-Lobito Tomboco

(BBLT) 16-in. (46-cm) gas export

pipeline via a subsea piggable wye in

570 ft (174 m) of water.

The oil export pipeline (18-in.

(46-cm) diameter, 16-mi (26-km))

length ties in to the BBLT 20-in.

(51-cm) oil export pipeline via a

subsea piggable wye in 380 ft

(0.12-km) of water. The DPP rigid

export pipeline risers were pre-

installed on the CPT and the export

pipelines contractor installed a rigid

tie-in jumper to these risers.

Subsea Equipment

Purchase OrderThe EPC contract for subsea

equipment was awarded to Vetco

Gray, U.K. in September 2006.

Fabrication of the manifolds at the

Sonamet yard in Lobito started

in August 2007. Vetco Gray U.K.

engineered, procured, fabricated,

inspected, tested, and delivered the

subsea equipment, including the tree

system, manifolds and well jumpers

and production control systems.

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Subsea Installation Contract

The EPCI contract for subsea

installation was awarded to Subsea 7

Installation Ltd. in September 2006.

The purchase order for flowlineline pipe was placed in November

2006, with Subsea 7 Installation

Ltd. The tieback facilities are

comprised of the following main

elements: production and water

injection manifolds; production, test,

water, and gas lift flowlines; flexible

jumpers; and one control umbilical,

including associated equipment and

flying leads. Phase 1 of Subsea 7s

campaign, the flowline installation,

was completed in July 2008, and

Phase 2, the tie-in activities, was

completed in February 2009.

Tender-Assisted Drilling Rig

The contract for the TAD was

awarded to Seadrill Asia, Ltd. in

August 2006. The TAD will arrive

at location in August 2009, and bemoored adjacent to the DPP and

used for drilling operations. The

derrick equipment set will be

placed on the DPP for well

operations and removed when

the drilling rig is demobilized.

Environmental Stewardship

Zero Flaring

Tombua Landana is designed for zero routine gas flaring and zero

discharge of produced water. Associated natural gas will be processed

and stored in Block 0 until the Angola Liquefied Natural Gas (LNG)

project is ready, eliminating millions of pounds of CO2that otherwisewould be released into the atmosphere through flaring.

Produced Water Management

Chevron will recycle Tombua Landanas produced water and reinject

it into reservoirsone of the first new-generation facilities offshore

Angola to apply this technology to improve recovery and reduce

discharges to the ocean.



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Angolan Content

Development of AngolanProfessionals

Operations Training

Chevron currently employs more

than 2,900 national employees

in Angola, accounting for 86% of

the companys total workforce in

the country. The Tombua Landana

projects goal is for 90% of the

operations workforce to be Angolan.

To meet this goal, our Angolan

recruits undergo an intensive

training program that combines

classroom instruction withon-the-job training.

Cabinda Gulf Oil Company (CABGOC)

Learning and Development Center

is Chevrons training center in

Malongo, the companys center of

operations in Angola. Because of

the large number of people being

trained, the center became full.

To provide an additional resource,

Chevron augmented Angola training

at its Employee Resource Training

Center in Lafayette, Louisiana, which

focuses on Gulf of Mexico operations.

Not only could Lafayette trainers

supplement what workers learn

in Malongo, they could also share

deepwater expertise.

Twenty-three Angolans from the

Tombua Landana project attended

full-time training at the Lafayette

center, enhancing their skills as

operators on the Tombua Landanaplatform. Trainees studied at the

center for periods ranging from

three to ten months and followed

curriculums designed to match

their needs.

Angola trainees used the same

training manual as Gulf workers. To

successfully finish the program, they

had to master the manual and score

well on computer-based tests.

Angolan members of the Tombua

Landana project also visited Gulf of

Mexico offshore platforms to learn

more about the production process

and to complete checkpoints in their

Chevron training programs.

On-the-Job Training

After completing the U.S.-based

training program, the future Tombua

Landana operators participated in

16 months of on-the-job training,fine-tuning their skills offshore

Angola. By working on various

production platforms and interacting

with other Angolan and expatriate

operations personnel, the Tombua

Landana trainees continue to

build their knowledge and set the

foundation for a successful startup

of Tombua Landana.

Chevron strives to expand

career opportunities for its

Angolan workforce through

education, training, and job

development.

The Tombua Landana project plan uses over US$265 million of local content.

The plan maximizes the capabilities of Angolan engineering, procurement,

construction, and installation. The project has also used a new pipeline coating

plant, located in Luanda, for all subsea flowline pipe-coating operations.

Surplus Gas Treatment

The main gas compression capacity

exceeds 200 million standard cubic

feet per day, which includes both

associated gas and gas lift gas.

The artificial lift method will be

gas lift. The facility is equipped

with oil, gas, and water treatment

systems capable of meeting all

export and environmental

discharge specifications.

Surplus gas will be exported to

Block 0 via a pipeline that ties into

the BBLT gas export pipeline via a

subsea wye. The gas will be stored

in an existing reservoir until it can

be commercialized through the

Angola LNG project. The facility will

accommodate production from two

future subsea satellite tiebacks to

Tombua Landana, in addition to the

subsea center (Tombua South) that

is in Stage 1 development.



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Commitment to Incident- and Injury-Free(IIF) Work The Tombua Landana Compliant Piled Tower

The Tombua Landana project has established an IIF work environment

throughout all areas of project execution. The Tombua Landana project teamstrives to create an injury-free culture, environment, and performance for the

benefit of all workers on the project.

This is not business as usual. Rather, it is:

A mindset and environment that injury-free operations are possible.

A journey of continuous safety improvement.

Intolerance of any level of frequency or severity of incident or injury.

A focus on people, not numbers and statistics.

Leadership-driven through all levels of the project.

About building relationships.

One of the worlds largest structures

Second compliant piled tower in Angola

Fourth compliant piled tower in the world

TombuaLandana CPT

474 m(1,554 ft)

Taipei101

508 m(1,667 ft)

EiffelTower

320 m(1,020 ft)

Vasco daGama Tower

145 m(476 ft)

PirelliTower

127 m(417 ft)

A. NetoMausoleum

124 m(407 ft)


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