PTT Head Office: 0-2537-2161

PTT Exploration and Production Public Company Limited (PTT EP): 66 (0) 2537-4000

- Mr.Prisdapunt Pojanapreecha Executive Vice President, Engineering, Operations & Supply Chain Group

- Mr.Somkiet Janmaha Executive Vice President, Geosciences, Reservoir Engineering & Exploration Group

- Mr.Chalermkiat Tongtaow Senior Vice President, Geosciences & Resevoir Engineering Technology Division, Geosciences, Resevoir Engineering & Exploration Group

- Mr.Somchai Manopinives Senior Vice President, Technology & Operations Division

- Mr.Phongsthorn Thavisin Senior Vice President, Engineering & Construction Division; acting Greater Bongkot South Construction Project Manager; acting Vice President, Engineer Management System

- Mr.Kanit Sangwongwanich Senior Vice President, attached to Domestic Asset Group; seconded as General Manager, Carigali-PTTEPI Operating Company SDN. BHD. (CPOC), Malaysia

- Mr.Vinit HansamuitVice President, Reservoir Engineering

- Mr.Pich PiyaratnVice President, attached to Engineering & Construction Division; Engineering Operation & Supply Chain Group

- Mr.Vuthiphon ThuampoomngamVice President, S1 Operations

- Mr.Sorasan MilindasutaVice President attached to Supply Chain Management Division, Engineering, Operations and Supply Chain Group

- Mr.Bundit PattanasakVice President, Engineering & Technology, Engineering & Construction, Engineering, Operations & Supply Chain Function Group

- Mr.Edmund Byrne MetcalfeVice President, Contract, Supply Chain Management Division, Engineering Operation & Supply Chain Function

- Mr.Bundit ChaisilboonVice President, Geology, Geosciences & Reservoir Engineering Technology Division, Geosciences, Reservoir Engineering and Exploration Group

- Mr.Thuan JariyagowitVice President, Maintenance & Inspection, Technology & Operation Division, Engineering, Operation & Supply Chain Funtion Group

01

A4/48, A5/48 & A6/48 Project

Type of Business Exploration and Production

Concessions 6/2550/82 (Blocks A4/48, A5/48 and A6/48)

Area 44,521.66 square kilometers

Location Andaman Sea on the west coast of Thailand

Operator PTTEP International Limited (PTTEPI)

Phase Exploration

Investment Type PTTEP as Operator

Petroleum Fields -

Type of Petroleum Natural Gas

Production Start-up -

More...

02

Arthit Project

Type of Business Exploration and Production

Concessions Blocks B14A, B15A, B16A, G8/50 and G9/48

Area 4,185 square kilometers

LocationIn the Gulf of Thailand, approximately 230 kilometers off the coast of Songkhla province, adjacent to Bongkot concession area

Operator PTT Exploration and Production Plc.

Phase Production

Investment Type PTTEP as Operator

Petroleum Fields Arthit

Type of Petroleum Condensate, Crude Oil and Natural Gas

Production Start-up March 1, 2008

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03

B6/27 Project

Type of Business Exploration and Production

Concessions Block B6/27 awarded February 1985

Area 1,302 square kilometers

LocationIn the Gulf of Thailand, Offshore approximately 25 kilometers off Chumporn's coast.

Operator PTT Exploration and Production Plc.

Phase Production

Investment Type PTTEP as Operator

Petroleum Fields Nang Nuan

Type of Petroleum Crude Oil

Production Start-up May 22, 2005

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04

B8/32 & 9A Project

Type of Business Exploration and Production

Concessions Blocks B8/32 and 9A

Area 2,541 square kilometers

Location In the Gulf of Thailand, off the Chumporn coast

Operator Chevron Offshore (Thailand) Ltd.

Phase Production

Investment Type PTTEP as Joint Venture Partner

Petroleum Fields Benchamas, Chaba, Jarmjuree, Maliwan and Tantawan

Type of Petroleum Crude Oil and Natural Gas

Production Start-up January 1997

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05

Bongkot Project

Type of Business Exploration and Production

Concessions Blocks B15, B16, B17, G12/48

Area 3,986 square kilometers

LocationIn the Gulf of Thailand, approximately 600 kilometers from the south of Bangkok and 203 kilometers off the coast of Songkhla province

Operator PTT Exploration and Production Plc.

Phase Production

Investment Type PTTEP as Operator

Petroleum Fields Bongkot, Ton Sak, Ton Rang, Ton Nok Yoong, Ton Koon and Pikul

Type of Petroleum Condensate, Crude Oil and Natural Gas

Production Start-up July 15, 1993

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06

Contract 3 Project

Type of Business Exploration and Production

ConcessionsBlocks 10 and 11, Concession Number 1/2515/5 awarded on March 6, 1972 under Thailand I and Concession Block 12, 13 and G6/50

Area 2,738 square kilometers

LocationIn the Gulf of Thailand, off the coast of Surat Thani Province

Operator Please see below table

Phase Production

Investment Type PTTEP as Joint Venture Partner

Petroleum Fields Funan, Surat, Jakrawan, Gomin, Yala, Plamuk, Trat, Pakarang, South Gomin

Type of Petroleum Condensate, Crude Oil and Natural Gas

Production Start-up February 20, 1992

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07

Contract 4 Project

Type of Business Exploration and Production

Concessions Blocks B12/27 and G7/50

Area 3,118 square kilometers

Location In the Gulf of Thailand, offshore Songkhla Province

Operator Please see below table

Phase Production

Investment Type PTTEP as Joint Venture Partner

Petroleum Fields Pailin, Nin, Morakot, Paytai, Ubon and Taptim

Type of Petroleum Condensate and Natural Gas

Production Start-up August 19, 1999

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08

E5 Project

Type of Business Exploration and Production

ConcessionsBlock E5 Concession Number 2/2522/17 awarded on March 16, 1979 under Thailand I

Area 69 square kilometers

Location Khon Khaen province, Thailand

Operator ExxonMobil Exploration and Production Khorat Inc.

Phase Production

Investment Type PTTEP as Joint Venture Partner

Petroleum Fields Nam Phong

Type of Petroleum Natural Gas

Production Start-up Auguste 15, 1990

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09

G4/43 Project

Type of Business Exploration and Production

ConcessionsBlock G4/43, July 17, 2003 acquired under Thailand III

Area 9,686 square kilometers

LocationIn the Gulf of Thailand, off the coast of Prachuab Khirikhan province

Operator Chevron Offshore (Thailand) Ltd.

Phase Production

Investment Type PTTEP as Joint Venture Partner

Petroleum Fields Lanta, Similan and Surin

Type of Petroleum Crude Oil and Natural Gas

Production Start-up January 2008

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10

G4/48 Project

Type of Business Exploration and Production

Concessions Block G4/48

Area 504 square kilometers

Location Gulf of Thailand, Offshore

Operator Chevron Pattani Limited

Phase Production

Investment Type PTTEP as Joint Venture Partner

Petroleum Fields Yungthong

Type of Petroleum Crude Oil and Natural Gas

Production Start-up August 1, 2009

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11

G9/43 Project

Type of Business Exploration and Production

Concessions Block G9/43

Area 2,619 square kilometers

Location In the Gulf of Thailand

Operator PTTEP International Limited

Phase Exploration

Investment Type PTTEP as Operator

Petroleum Fields -

Type of Petroleum Condensate and Natural Gas

Production Start-up -

More...

12

L21/48 and L28/48

Type of Business Exploration and Production

Concessions Blocks L21/48 and L28/48

Area 11,803 square kilometers

LocationKhon Kaen and Chaiyaphum provinces (northeastern part of Thailand)

Operator PTTEP Siam Limited (PTTEPS)

Phase Exploration

Investment Type PTTEP as Operator

Petroleum Fields Chonnabot and Chaturus Structures

Type of Petroleum Natural Gas

Production Start-up -

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13

L22/43 Project

Type of Business Exploration and Production

Concessions Block L22/43

Area 3,632 square kilometers

Location Phitsanulok and Pichit Provinces

Operator PTTEP International Limited (PTTEPI)

Phase Exploration

Investment Type PTTEP as Operator

Petroleum Fields -

Type of Petroleum Crude Oil

Production Start-up -

More...

14

L53/43 & L54/43 Project

Type of Business Exploration and Production

Concessions Blocks L53/43 and L54/43

Area 7,955 square kilometers

LocationSuphan Buri, Kanchana Buri, Ayutthaya and Ang Thong Provinces, adjacent to PTTEP1

Operator PTTEP (Thailand) Limited

Phase Exploration

Investment Type PTTEP as Operator

Petroleum Fields -

Type of Petroleum Crude Oil

Production Start-up -

More...

15

MTJDA-B17 Project

Type of Business Exploration and Production

Concessions Blocks B-17 and B-17-01

Area 4,700 square kilometers

LocationIn the south of the Gulf of Thailand, off the coast of Thailand and Malaysia

OperatorCARIGALI-PTTEPI Operating Company Sdn. Bhd. (CPOC)

Phase Production

Investment Type PTTEP as Joint Venture Partner

Petroleum Fields Muda, Muda South, Tapi, Jengka, Amarit, Mali, Jengka West, Jengka East, and Jengka South

Type of Petroleum Crude Oil and Natural Gas

Production Start-up -

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16

PTTEP 1 Project

Type of Business Exploration and Production

Concessions PTTEP 1

Area 10 square kilometers

Location Suphan Buri and Nakhorn Pathom provinces

Operator PTTEP International Limited (PTTEPI)

Phase Production

Investment Type PTTEP as Operator

Petroleum Fields U-Thong, Kamphaengsaen and Sang Kajai

Type of Petroleum Crude Oil

Production Start-up July 1, 1993

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17

S1 Project

Type of Business Exploration and Production

ConcessionsBlock S1, Concession Number 1/2522/16 awarded on March 15, 1979 under Thailand I

Area 1,328 square kilometres

LocationSukhothai, Phitsanulok and Kamphaengpet provinces, Thailand

Operator PTT Exploration and Production Plc.

Phase Production

Investment Type PTTEP as Operator

Petroleum Fields

Sirikit (three adjacent areas), Sirikit West, Pru Krathiam, Wat Taen, Thap Raet, Pratu Tao, Nong Tum, Sirikit East, Nong Makham East, Sirikit-T, Nong Makham, Pradu Tao South and Sirikit West (Extension)

Type of Petroleum Crude Oil, LPG and Natural Gas

Production Start-up December 1, 1982

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18

Sinphuhorm Project

Type of Business Exploration and Production

Concessions Blocks E5 North & EU-1

Area 231.6 square kilometers

LocationUdon Thani and Khon Kaen provinces in the northeast of Thailand. Situated approximately 45 kilometers to the north of Nam Phong field.

Operator Hess (Thailand) Ltd.

Phase Production

Investment Type PTTEP as Joint Venture Partner

Petroleum Fields Phu Horm

Type of Petroleum Natural Gas

Production Start-up November 1,2006

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Carigali-PTTEPI Operating Company Sdn.Bhd.(CPOC)

Location: Head Office: Tower 1, PETRONAS Twin Towers, Kuala Lumpur City Centre 50088 Kuala Lumpur, Malaysia

Phone: (603) 2782-2555Fax: (603) 2713-9877Web site: -

Type of Business: Petroleum Exploration and Production

Number of Share Sold:

350,000 ordinary shares, 1 MYR (Malaysia Ringitt) per share

Petrochemical Business Unit:

http://www.irpc.co.th/?lang=en&page_id=3368

http://www.irpc.co.th/?page_id=5275&lang=en

http://www.irpcmarket.com/about.php

http://www.irpcmarket.com/contact_us.php

Petroleum Business Unit:

http://www.irpcpetroleum.com/en/PetroleumTeam.aspx

2 Head Offices of IRPCfor supporting business unit and production

Head Offices of Rayong Complex IRPC

Address :299 Moo 5 Sukumvit Road Choengnoen District ,Mueang Rayong 21000Tel :0-38611333 , 0-3861-3571-80Fax : 0-3861-2813

IRPC Public Company Limited - Sales of Petroleum Business

Address :555/2 Energy Complex Center Tower B Floor 9 ,Vipawadee-Rangsit ,Jatujak Sub-District,Jatujak District Bangkok 10900Tel :0-2649-7000Fax :0-2649-7313-16Website :

Petrochemical and Refining Business:

1. PTT Global Chemical Public Company Limited ----chemical---

http://www.pttgcgroup.com/contact.php?menu=company_address

2. HMC Polymers ----petrochemical----

http://www.hmcpolymers.com/locations

3. Bangchak Petroleum

http://www.bangchak.co.th/en/Contact-Us.aspx

http://www.bangchak.co.th/en/Business-Structure-1.aspx

http://www.bangchak.co.th/en/Management-Structure.aspx

http://www.bangchak.co.th/en/Head-Office-Distribution-Center.aspx

SVP Refinery Business: Vichien Usanachote

SVP Refinery Operation Refinery Business: Chalermchai Udomreno

SVP Refinery Technique Refinery Business: Kitti Niwatwong

VP, Refinery Engineering Refinery Business: Thanachit Makaranond

VP, Refinery Project Refinery Business: Pisetpong Sasanavin

4. Thai Oil Group ---Refining---

Thai Oil Public Company Limited ().

Tel: 02-797-2999, 02-299-0000.

Thai Oil refinery.

Tel: 0-3840-8500, 0-3835-9000, 0-3835-1555.

http://www.thaioilgroup.com/en/about-us/management/sub2.php

http://www.thaioilgroup.com/pdf/Org_Chart_Mgt_19_Jul_11.pdf

~Oil Refinery:

http://www.thaioilgroup.com/en/business-structure/oil-refining-business/index.php

http://www.thaioilgroup.com/en/business-structure/oil-refining-business/sub2.php

~Petrochemical Business:

http://www.thaioilgroup.com/en/business-structure/petrochemical-business/index.php

http://www.thaioilgroup.com/en/business-structure/petrochemical-business/sub2.php

~Lube Base Oil:

http://www.thaioilgroup.com/en/business-structure/base-oil-business/index.php

http://www.thaioilgroup.com/en/business-structure/base-oil-business/sub2.php

http://www.thailube.co.th/webpage/en/contact/index.asp

~Ethanol:

http://www.thaioilgroup.com/en/business-structure/ethanol-business/index.php

http://www.thaioilgroup.com/en/business-structure/ethanol-business/sub2.php

~Power Generation:

http://www.thaioilgroup.com/en/business-structure/power-business/index.php

http://www.thaioilgroup.com/en/business-structure/power-business/sub2.php

~Solvent and Chemical Products:

http://www.thaioilgroup.com/en/business-structure/thaioil-solvent/index.php

http://www.thaioilgroup.com/en/business-structure/thaioil-solvent/sub2.php