background information document - erm located approximately 60 km offshore gha na (figure 1). oil...

00002�E78�ES�RPT�0003—Rev2

13.02.2012

Tweneboa, Enyenra and

Ntomme (T.E.N.) development

Tullow Ghana Limited (TGL) has interests in two

oil concession blocks offshore Ghana, namely

Deepwater Tano (DWT) and West Cape Three

Points. In 2009 to 2010, TGL and its Partners

(Kosmos Energy LLC, Anadarko Petroleum

Corporation, Ghana National Petroleum Company

and Sabre Oil and Gas) developed the Jubilee oil

field located approximately 60 km offshore Gha�

na (Figure 1). Oil production started in

December 2010 through the Kwame Nkrumah

Floating Production Storage and Offloading

(FPSO) vessel (Figure 2).

Further exploration and appraisal drilling in the

DWT block during 2009 and 2010 resulted in the

discovery of the Tweneboa, Enyenra (originally

named Owo) and Ntomme (T.E.N.) fields. The

fields are located approximately 30km to the

west of the Jubilee Field (see Figure 3).

TGL is now proposing to develop the T.E.N.

fields. The proposed project is referred to as the

T.E.N. development. TGL is the designated

operator for the DWT block and will lead the

project design, execution, and operation phases

of the proposed development.

The aim of this document is to provide back�

ground information about the project and the

EIA process and to invite comment on any issues

or concerns you may have.

Figure 1: Locality map

Figure 2: Kwame Nkrumah FPSO offshore Ghana

Environmental Impact Assessment

(EIA)

Under the Ghana Environmental

Assessment Regulations of 1999

(LI 1652) an EIA is required to be

submitted by the applicant in support of

oil production projects.

TGL has commissioned Environmental

Resources Management, UK (ERM) in

collaboration with two Accra�based

companies, namely ESL and SRC , to

undertake the EIA for the T.E.N.

development.

The EIA will describe the project, assess

the likely positive and negative

environmental and social impacts of the

project and describe the plans to be put

in place to manage these impacts. The

EIA, along with comments received

from stakeholders will be submitted to

the Environmental Protection Agency

(EPA) who will decide whether or not to

authorise the proposed project.

T.E.N. Background Information Document

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other products are made. A gas pipeline will

connect the T.E.N. FPSO to the Kwame

Nkrumah for the purposes of start�up and

commissioning and in the future for gas

export to shore via the Kwame Nkrumah.

Support Operations

Support vessels (eg crew change and supply

boats) and helicopters will be required to

support drilling operations. FPSO operations

will also require daily visits from a support

vessel to bring supplies and tugs will be

required to help in the weekly tanker offload�

ing operations. Twice daily helicopter support

will also be required for crew transfers. The

onshore support base is proposed to be at the

existing Port of Takoradi and heliport facilities

at Takoradi naval base.

Safety Zone

As required for all offshore installations there

will be a temporary safety zone around the

drilling vessel during well drilling and a

permanent safety zone around the FPSO and

oil offloading buoy with no access to unau�

thorised vessels. It is likely that this will cover

an area within a 1,000 m of the FPSO and

offloading buoy.

Tweneboa, Enyenra and Ntomme (T.E.N.) development

Field Development and Production

Following discovery of the T.E.N.

hydrocarbon (oil and gas) fields, the TGL

engineering team have been working on the

initial design of hydrocarbon production

operations and facilities to bring the

hydrocarbons to the surface. The

development of the field requires drilling a

series of wells and the installation of subsea

equipment.

Production Facility

Hydrocarbons from the T.E.N. field will be

produced through a customised ship, called a

Floating Production, Storage and Offloading

(FPSO) vessel. The FPSO will be permanently

moored in the DWT block. Hydrocarbons

from the wells will be transferred to the

FPSO through a number of risers (pipes)

attached to wellheads on the seabed.

Offloading System

The hydrocarbons from the wells will be

processed and stored on board the FPSO.

Shuttle tankers will offload the oil from a

separate offloading buoy moored to the

north of the FPSO and will take the oil to

refineries across the world where petrol and

Figure 3: Map showing T.E.N. fields and proposed FPSO location.


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Key Issues Identified to Date

Impacts to Water

• Discharge of cuttings to sea in accordance with EPA limits during well drilling. • Disposal of excess water from the wells into the sea (produced water).

• Discharges (cooling water, ballast water, sewage and deck drainage) to the sea and impacts on water quality.

Impacts to Atmosphere

• Emissions from flaring during well testing and completion operations.

• Exhaust emissions from support vessels and helicopters and from power generation from gas turbines on the T.E.N. FPSO.

• Emissions from gas flaring during commissioning, maintenance shutdowns and emergencies.

Waste Management

• Disposal of solid waste from the T.E.N. FPSO and support vessels.

• Use and disposal of process chemicals.

Biodiversity

• Seabed ‘footprint’ of subsea infrastructure resulting in seabed disturbance and

impacts on benthic communities. • Disturbance from vessel movements, helicopter operations, noise and light to

birds, sea mammals, turtles and fish.

Socio+economics

• Tax revenues payable to the government and effects on the development. • Creation of direct and indirect employment opportunities.

• Influx of people seeking employment and business opportunity. • Exclusion of commercial and recreational vessels and fishermen from safety

zone around the FPSO and tankers. • Potential impacts on fish resources due to presence of structures and vessel and

discharges and secondary impacts on commercial fisheries.

• Potential damage to fishing nets and increased risk of shipping collisions along supply vessel transit routes.

• Effects of increased use of supply base and heliport on existing users and residents.

Accidental Events

Accidental events could include oil spills and fires which could have impacts to:

• marine and coastal resources and associated socio�economic effects; and

• transboundary effects (eg Cote d’Ivoire).

Cumulative Impacts

The EIA will consider cumulative impacts of existing projects, the proposed project

and planned future projects.


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The EIA Process

The EIA process has the following main steps:

• Register EIA with the EPA. • Initial scoping consultation with key

stakeholders. • Compile and submit Scoping Report

to EPA.

• Advertise and make Scoping Report available to stakeholders for

comment. • Stakeholder consultation meetings to

discuss proposals and obtain

comment. • Collate baseline information

• Compile draft EIA report and Environmental Management Plan (EMP)

• Advertise and make draft EIA report available to stakeholders

• EPA to call for Public Hearings. • Compile final EIA report and EMP and

submit to EPA for decision�making

Environmental Resources

Management

Tel: +27 21 702 9100

Email:

[email protected]

Address: ERM, Block A, Silverwood House,

Steenberg Office Park Steenberg, 7945,

Cape Town, South Africa

Tullow Ghana Limited

Tel: 030 274 2200

Email:

[email protected]

Address: Tullow Ghana Limited

P O Box CT 386

Cantonments, Accra

SRC Consulting

Tel: +233 24409 9446

Email: [email protected]

Address

Private Mail Bag CT 361

Cantonments, Accra, Ghana

ESL Consulting

Tel: 021 514614

Fax: 021 520298

Email: [email protected]

Address: ESL Consulting

PO Box LG 239, Legon, Accra, Ghana

EIA Contacts


Submission of Project EIA Form

Screening

Scoping and TOR

Submission of Draft EIS

Draft EIS Review

EIS Revision Required

Public Hearing

EPA Decision

EP Declined

Inspection

PER Review

EP Issued

EP Issued

EIA Required Resubmit

EP Declined

EP Issued

Hearing Required

EIA Required

PER Required

25 Working Days

75 Working Days

15 Working Days

EIA

TOR Review

TOR Revision Required

25 Working Days

Process Total 90 Working Days

EP = Environmental Permit

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Typical offshore drilling vessel

Shore base at Takoradi port — one of the onshore support units available for the T.E.N. development

Example of a spread moored FPSO

Subsea installation operations Typical offloading operations

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background information document - erm located approximately 60 km offshore gha na (figure 1). oil...

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