13. Reference Information

13.1 Juristic Persons of which the Company’s Shareholding exceeded 10%¹²

1. PTTEP International Limited or PTTEPI

  Location 555 PTTEP Office Building, Vibhavadi-Rangsit Rd., Chatuchak,
  Bangkok 10900

  Tel. 66 (0) 2537-4000

  Fax 66 (0) 2537-4444

  Branch Office 2 (c) Sei-Myaung Yeiktha Lane, Mayangon Township,
  Yangon, Union of Myanmar

  Number of Issued Shares 2,000,000,000 ordinary shares, Baht 10 per
  share

2. PTTEP Offshore Investment Company Limited or PTTEPO
Location The Offices of the Bank of Nova Scotia Trust Company

  (Cayman) Limited, P.O.Box 501, Second Floor, The Bank of Nova Scotia
  Building, George town, Grand Cayman

Mailing Address 555 PTTEP Office Building, Vibhavadi-Rangsit Rd.,
Chatuchak, Bangkok 10900

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

Number of Issued Shares 6,667 ordinary shares, USD 1 per share

3. PTTEP Kim Long Vietnam Company Limited or PTTEP KV

Location The Offices of the Bank of Nova Scotia Trust Company (Cayman)
Limited, P.O.Box 501, 3^(rd) Floor, The Bank of Nova Scotia Building,
George town, Grand Cayman

Mailing Address 555 PTTEP Office Building, Vibhavadi-Rangsit Rd.,
Chatuchak, Bangkok 10900

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

Number of Issued Shares 50,000 ordinary shares, USD 1 per share

____________________________

¹² Please see the details of shareholders and interest percentage of
each subsidiary in item 5.2

4. PTTEP Southwest Vietnam Company Limited or PTTEP SV

Location The Offices of the Bank of Nova Scotia Trust Company (Cayman)
Limited, P.O.Box 501, 3^(rd) Floor, The Bank of Nova Scotia Building,
George town, Grand Cayman

Mailing Address 555 PTTEP Office Building, Vibhavadi-Rangsit Rd.,
Chatuchak, Bangkok 10900

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

Number of Issued Shares 50,000 ordinary shares, USD 1 per share

5. PTTEP Hoan-Vu Company Limited or PTTEP HV

Location The Offices of the Bank of Nova Scotia Trust Company (Cayman)
Limited, P.O.Box 501 GT,3^(rd) Floor, The Bank of Nova Scotia Building,
George town, Grand Cayman

Mailing Address 555 PTTEP Office Building, Vibhavadi-Rangsit Rd.,
Chatuchak, Bangkok 10900

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

Number of Issued Shares 50,000 ordinary shares, USD 1 per share

6. PTTEP Hoang-Long Company Limited or PTTEP HL

Location The Offices of the Bank of Nova Scotia Trust Company (Cayman)
Limited, P.O.Box 501 GT, 3^(rd) Floor, The Bank of Nova Scotia Building,
George town, Grand Cayman

Mailing Address 555 PTTEP Office Building, Vibhavadi-Rangsit Rd.,
Chatuchak, Bangkok 10900

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

Number of Issued Shares 50,000 ordinary shares, USD 1 per share

7. PTTEP Oman Company Limited or PTTEP OM

Location The Offices of the Bank of Nova Scotia Trust Company (Cayman)
Limited, P.O.Box 501 GT, 3^(rd) Floor, The Bank of Nova Scotia Building,
George town, Grand Cayman

Branch 2^(nd) Floor, Al Barami Building, Building no. 370, Block 248,
Street no. 272, Azaibah, Muscat, Sultanate of Oman

Mailing Address 555 PTTEP Office Building, Vibhavadi-Rangsit Rd.,
Chatuchak, Bangkok 10900

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

  Number of Issued Shares 50,000 ordinary shares, USD 1 per share

8. PTTEP Algeria Company Limited or PTTEP AG

Location The Offices of the Bank of Nova Scotia Trust Company (Cayman)
Limited, P.O.Box 501 GT, 3^(rd) Floor, The Bank of Nova Scotia Building,
George town, Grand Cayman

Mailing Address 555 PTTEP Office Building, Vibhavadi-Rangsit Rd.,
Chatuchak, Bangkok 10900

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

  Number of Issued Shares 50,000 ordinary shares, USD 1 per share

9. PTTEP Iran Company Limited or PTTEP IR

Location The Offices of Scotiabank &Trust Company (Cayman) Limited,
P.O.Box 501 GT, 3^(rd) Floor, 6 Cardinall Avenue, Scotiabank Building,
George town, Grand Cayman

Branch Unit 5 & 6, 5th Floor, Sayeh Tower, Vali-e-Asr Avenue, 19677
13671 Tehran-Iran

Mailing Address 555 PTTEP Office Building, Vibhavadi-Rangsit Rd.,
Chatuchak, Bangkok 10900

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

  Number of Issued Shares 50,000 ordinary shares, USD 1 per share

  10. PTTEP (Thailand) Limited or PTTEPT

Location 555 PTTEP Office Building, Vibhavadi-Rangsit Rd., Chatuchak,
Bangkok 10900

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

  Number of Issued Shares 10,000,000 ordinary shares, Baht 10 per share

  11. PTTEP Siam Limited or PTTEPS

Location 555 PTTEP Office Building, Vibhavadi-Rangsit Rd., Chatuchak,
Bangkok 10900

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

  Number of Issued Shares 1,000,000 ordinary shares, Baht 100 per share

  12. PTTEP Services Limited or PTTEP Services

Location 555 PTTEP Office Building, Vibhavadi-Rangsit Rd., Chatuchak,
Bangkok 10900

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

  Number of Issued Shares 100,000 ordinary shares, Baht 10 per share

13. Diamond Petroleum Company Limited or DPC

Location The Offices of Scotiabank & Trust Company (Cayman) Limited,
P.O.Box 501 GT, 3^(rd) Floor, 6 Cardinall Avenue, Scotiabank Building,
George town, Grand Cayman

Mailing Address 555 PTTEP Office Building, Vibhavadi-Rangsit Rd.,
Chatuchak, Bangkok 10900

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

  Number of Issued Shares 50,000 ordinary shares, USD 1 per share

14. PTTEP Merangin Company Limited or PTTEPM

Location The Offices of Scotiabank & Trust Company (Cayman) Limited,
P.O.Box 501 GT, 3^(rd) Floor, 6 Cardinall Avenue, Scotiabank Building,
George town, Grand Cayman

Mailing Address 555 PTTEP Office Building, Vibhavadi-Rangsit Rd.,
Chatuchak, Bangkok 10900

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

  Number of Issued Shares 50,000 ordinary shares, USD 1 per share

  15. PTTEP Bahrain Company Limited or PTTEP BH
  Location The Offices of Scotiabank & Trust Company (Cayman)

  Limited, P.O.Box 501 GT, 3^(rd) Floor, 6 Cardinall Avenue, Scotiabank
  Building, George town, Grand Cayman

  Mailing Address 555 PTTEP Office Building, Vibhavadi-Rangsit Rd.,
  Chatuchak, Bangkok 10900

  Tel 66 (0) 2537-4000

  Fax 66 (0) 2537-4444

  Number of Issued Shares 50,000 ordinary shares, USD 1 per share

16. PTTEP Holding Company Limited or PTTEPH
Location The Offices of Scotiabank& Trust Company (Cayman) Ltd., P.O.
Box

501, 3^(rd) Floor, 6 Cardinall Avenue, Scotiabank Building, George Town,

Grand Cayman KY1-1106, Cayman Islands
Mailing Address 555 PTTEP Office Building, Vibhavadi-Rangsit Rd.,
Chatuchak,

Bangkok 10900
Tel 66 (0) 2537-4000
Fax 66 (0) 2537-4444

  Number of Issued Shares 50,000 ordinary shares, USD 1 per share

17. PTTEP Indonesia Company Limited or PTTEP ID
Location The Offices of Scotiabank& Trust Company (Cayman) Ltd., P.O.
Box

501, 3 ^(rd) Floor, 6 Cardinall Avenue, Scotiabank Building, George

Town, Grand Cayman KY1-1106, Cayman Islands

  Mailing Address 555 PTTEP Office Building, Vibhavadi-Rangsit Rd.,
  Chatuchak,

  Bangkok 10900

  Tel 66 (0) 2537-4000

  Fax 66 (0) 2537-4444

  Number of Issued Shares 50,000 ordinary shares, USD 1 per share

18. PTTEP Bengara I Company Limited or PTTEPB
Location The Offices of Scotiabank& Trust Company (Cayman) Ltd., P.O.

Box 501, 3 ^(rd) Floor, 6 Cardinall Avenue, Scotiabank Building,

George Town, Grand Cayman KY1-1106, Cayman Islands

  Mailing Address 555 PTTEP Office Building, Vibhavadi-Rangsit Rd.,
  Chatuchak,

  Bangkok 10900

  Tel 66 (0) 2537-4000

  Fax 66 (0) 2537-4444

  Number of Issued Shares 50,000 ordinary shares, USD 1 per share

19. Orange Energy Limited or Orange

Location 555 PTTEP Office Building, Vibhavadi-Rangsit Rd., Chatuchak,
Bangkok 10900

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

  Number of Issued Shares 1,000,000 ordinary shares, Baht 100 per share

20. Energy Complex Company Limited

Location 555 PTT Office Building, Vibhavadi-Rangsit Rd., Bangkok 10900

Tel. 66 (0) 2537-1961

Fax 66 (0) 2537-1962

  Number of Issued Shares 80,000 ordinary shares, Baht 10 per share

21. B 8/32 Partners Limited

Location Tower III SCB Park Plaza, 19 Ratchadapisak Road, Chutuchak
Bangkok 10900

Tel. 66 (0) 2545 - 5555

  Fax 66 (0) 2545 - 5554

  Number of Issued Shares 110,000 ordinary shares, Baht 1000 per share

22. Carigali-PTTEPI Operating Company Sdn.Bhd. or CPOC

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

  Mailing Address Level 8, Tower 2 PETRONAS Twin Towers, Kuala Lumpur
  City Centre 50088 Kuala Lumpur, Malaysia

  Tel. (603) 2782-2555

  Fax (603) 2713-9877

  Number of Issued Shares 200,000 ordinary shares, MR (Malaysia Ringitt)
  1 per share

23. Moattama Gas Transportation Company or MGTC

Location C/O Clarendon House, Church Street, Hamilton HM CX, Bermuda

Mailing Address: No.5 Sacred Tooth Relic Lake Avenue, Punnpin Gone
Quarter No.5, Mayangone Township, Yangon, Union of Myanmar

Tel. (951) 650-977, 660-466

Fax (951) 650-478, 650-479

Number of Issued Shares 1,000,000 ordinary shares, USD 0.03 per share

24. Taninthayi Pipeline Company LLC or TPC

Location The Offices Maples and Calder, Attorney-at-Law, Ugland House,
P.O. Box, Grand Cayman

Mailing Address 16 Shwetaung Kyar, Bahan 11201, Yangon, Union of Myanmar

Tel. (951) 526-411, 525-704

Fax (951) 525-698, 525-684

Number of Issued Shares 100,000 ordinary shares, USD 1 per share

25. PTT ICT Solutions Company Limited

  Location 13rd, PTT Office Building, 555 Vibhavadi Rangsit Road,
  Chatuchak, Bangkok 10900

  Tel. (66) 02537- 3456

  Fax (66) 02537 - 3498 - 9

  Number of Issued Shares 15,000,000 ordinary shares, 10 baht per share

13.2 Share Registrar

Name Thailand Securities Depository Company Limited

Location SET Building, 62 Ratchadapisek Rd.

  Klongtoey, Bangkok 10110, Thailand

Tel. 66 (0) 2229-2800

Fax 66 (0) 2359-1259

13.3 Debenture Registrar (Debenture Baht 2,500 million)

  Name Thai Military Bank Public Company Limited

  Location 393 Silom Road, Bangrak, Bangkok 10500

  Tel. 66 (0) 2230-5575, 66 (0) 2230-5000

  Fax 66 (0) 2236-7939

13.4 Debenture holders' Representatives

(1) Debenture holders' Representatives (Yankee Bond US$ 200,000,000)

Name The Bank of New York

Location One Temasek Avenue, #02-01 Millenia Tower, Singapore 039192

Tel. (65) 6432-0286

Fax. (65) 6883-0338

(2) Debenture holders' Representatives (Yankee Bond 23,000,000,000 Yen)

  Name Sumitomo Mitsui Banking Corporation

  Location Yusen-Odenmacho Building,

  13-6, Kodenma-cho, Nihonbashi, Chuo-ku, Tokyo 103-0001, Japan

  Tel. 81-3-5640-6634

  Fax. 81-3-5695-5202

13.5 Auditor

Name Office of the Auditor General of Thailand

Location Rama VI Rd., Phayathai, Bangkok 10400, Thailand

Tel. 66 (0) 2618-5803

Fax 66 (0) 2618-5807

13.6 Legal Consultant

  (1) Name Herbert Smith (Thailand) Limited

  Address 1403 Abdulrahim Place

990 Rama IV, Bangkok 10500, Thailand

  Tel. 66 (0) 2657-3888

  Fax 66 (0) 2636-0657

(2) Name Herbert Smith (Hong Kong) Limited

Address             23^(rd) Floor Gloucester Tower

  11 Pedder Street Hong Kong

  Tel.    (852) 2 845-6639

  Fax       (852) 2 845-9099

(3) Name Hiswara Bunjamin& Tandjung

Address 23^(rd) Floor Gedung BRI II

JI Jend. Sudirmankav. 44-46

Jakarta 10210, Indonesia

Tel. (622) 1 574-4010

Fax (622) 1 574-4670, (622) 1 574-4671

  (4) Name Clifford Chance (Thailand) Limited

Address Floor 21 Sindhorn Building Tower 3

130-132 Wireless Road

Pathumwan Bangkok 10330

Tel. 66 (0) 2263-2250

Fax 66 (0) 2263-2240

(5) Name Wissen & Co. Ltd.

Address Level 8, Suite 3801, BB Building

  54 Sukhumvit 21 (Asoke)

  Klongtoey Nua, Wattana, Bangkok 10110

Tel. 66 (0) 2259-2627-9

Fax 66 (0) 2259-2630

(6) Name Elham Ali Hassan & Associates

Address 12^(th) Floor, Al Rossais Tower

Diplomatic Area, Manama

Kingdom of Bahrain

Tel. (973) 1753 3317

Fax (973) 1753 2262

13.7 Other Advisors

(1) Name Ms. Sukon Kanchanalai

Advisor to the Board of Director on Accounting & Commercial Issues

Address 188 Soi 16 South Tesbanimit Rd.,

Prachanivej I, Chutuchak District, Bangkok 10900, Thailand

Tel. 66 (0) 2589 - 5566

Fax 66 (0) 2537 – 4444

(2) Name 19 NOV95 Co., Ltd.

  Advisor on Petroleum Exploration and Development Issues in the Gulf of
  Thailand and Overseas

  Address 708 Sriyan Soi 1 Nakornchaisri Rd., Bangkok 10300

 Tel. 66 (0) 2243-3674, 66 (0) 2243-3644, 66 (0) 2669-0880 

 Fax 66 (0) 2243-3674

(3) Name Mr. Nopadon Mantajit

  Advisor on Policy and Planning on Investment and Development,
  Management Issues

  Address Technical Petroleum Training Institute

  Shinawatra Tower III, 6 th floor, Vibhavadi-Rangsit Rd, Chatuchak

  Bangkok 10900

Tel. 66 (0) 2 791-1729

  Fax 66 (0) 2 791-1730

(4) Name YBhg Dato’ Mohamad Idris bin Mansor

Advisor on International Exploration and Development Issues

Address 33 Jalan Firus 7/7, Section 7 40000 Shah Alam, Selangor Malaysia

 Tel. (603) 5519 3377 

 Fax (603) 5510 7431 

(5) Name Mr. Preecha Supalak

Advisor on the corporate social responsibility

  Address 4 Soi Chotsahay (Soi 1) Rimklongprapa Road, Bangsue, Dusit
  Bangkok10800

  Tel. 66 (0) 2585 – 2645

  Fax -

(6) Name Ms. Patchara Pariwatvorn

  Advisor on Knowledge Management, E&P Technical Database และ
  Geosciences Competency

  Address 45/47 Soi Sripichai, Rimklongprapa Road, Moo 9, Bangsue,
  Bangkok 10800

  Tel. (081) 835 – 9906

  Fax -