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  15. Reference Information

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

1. PTTEP International Limited or PTTEPI

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

  Tel. 66 (0) 2537-4000

  Fax 66 (0) 2537-4444

  Branch Office 2 Sei-Myaung Yeiktha Lane, 8 1/2 Mile, Mayangon
  Township, Yangon,

  Union of Myanmar

  Type of Business Petroleum exploration and production, investment in
  the petroleum business

  Percent of Interest PTTEP holds 100 %

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

  Number of Share Owned PTTEP holds 2,000,000,000 ordinary shares

2. PTTEP Offshore Investment Company Limited or PTTEPO

Location The Office of the Bank of Nova Scotia Trust Company (Cayman)
Limited, P.O.Box 501, Second Floor, The Bank of Nova Scotia Building,
Georgetown, Grand Cayman

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

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

Type of Business Investment

Percent of Interest PTTEP holds 75%

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

Number of Share Owned PTTEP holds 5,000 ordinary shares

3. PTTEP Kim Long Vietnam Company Limited or PTTEP KV

  Location The Office of the Bank of Nova Scotia Trust Company (Cayman)
  Limited, P.O.Box 501, Third Floor, The Bank of Nova Scotia Building,
  Georgetown, Grand Cayman

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

  Tel. 66 (0) 2537-4000

  Fax 66 (0) 2537-4444

  Type of Business Petroleum exploration and production and investment

  Percent of Interest PTTEPO holds 100%

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

  Number of Share Owned PTTEPO holds 50,000 ordinary shares

4. PTTEP Southwest Vietnam Company Limited or PTTEP SV

Location The Office of the Bank of Nova Scotia Trust Company (Cayman)
Limited, P.O.Box 501, Third Floor, The Bank of Nova Scotia Building,
Georgetown, Grand Cayman

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

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

Type of Business Petroleum exploration and production and investment

Percent of Interest PTTEPO holds 100%

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

Number of Share Owned PTTEPO holds 50,000 ordinary shares

5. PTTEP Hoan-Vu Company Limited or PTTEP HV

Location The Office of the Bank of Nova Scotia Trust Company (Cayman)
Limited, P.O.Box 501, Third Floor, The Bank of Nova Scotia Building,
Georgetown, Grand Cayman

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

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

Type of Business Petroleum exploration and production and investment

Percent of Interest PTTEPO holds 100%

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

Number of Share Owned PTTEPO holds 50,000 ordinary shares

6. PTTEP Hoang-Long Company Limited or PTTEP HL

Location The Office of the Bank of Nova Scotia Trust Company (Cayman)
Limited, P.O.Box 501, Third Floor, The Bank of Nova Scotia Building,
Georgetown, Grand Cayman

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

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

Type of Business Petroleum exploration and production and investment

Percent of Interest PTTEPO holds 100%

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

Number of Share Owned PTTEPO holds 50,000 ordinary shares

7. PTTEP Middle East Company Limited or PTTEP ME

Location Room No. 13, Al Medinat Plaza, Bashair Street, Medinat Al
Sultan Qaboos, Muscat, P.O. Box 163, P.C. 133 Al Khuwair, Muscat Oman

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

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

Type of Business Petroleum exploration and production and investment

Percent of Interest PTTEPO holds 100%

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

Number of Share Owned PTTEPO holds 50,000 ordinary shares

8. PTTEP Algeria Company Limited or PTTEP AG

Location The Office of the Bank of Nova Scotia Trust Company (Cayman)
Limited, P.O.Box 501, Third Floor, The Bank of Nova Scotia Building,
Georgetown, Grand Cayman

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

Tel. 66 (0) 2537-4000

Fax 66 (0) 2537-4444

Type of Business Petroleum exploration and production and investment

Percent of Interest PTTEPO holds 100%

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

Number of Share Owned PTTEPO holds 50,000 ordinary shares

9. Carigali-PTTEPI Operating Company Sendirian Berhad or CPOC

Location 16th Floor, (East Wing), Rohas Perkasa, No.8, Jalan Perak,
50450

Kuala Lumpur, Malaysia

Tel. (603) 263-4566

Fax (603) 263-4660, (603) 263-4622

Type of Business Operation in the JDA Project

Percent of Interest PTTEPI holds 50%

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

Number of Shares Owned PTTEPI holds 50,000 ordinary shares

10. New Links Energy Resources Limited or New Links

Location 3^(rd) Floor Cerne House, La Chausse Port Louis Republic of
Mauritius

Tel.: (230) 212-0223

Fax: (230) 208-8002

Type of Business Investment especially in the petroleum business via its
subsidiaries

  Percent of Interest PTTEPO holds 40%

  Number of Issued Shares 1,000 ordinary shares, US$0.01 per share

  Number of Shares Owned PTTEPO holds 400 ordinary shares

11. Thaioil Power Company Limited or TOP

Location 123 Suntowers Building B, 12^(th) Floor, Vibhavadi-Rangsit Rd.,
Bangkok 10900 Thailand

Tel. (662) 617-8300

Fax (662) 617-8299

Type of Business Power generation and sale

Percent of Interest PTTEPI holds 26%

Number of Issued Shares 281,000,000 ordinary shares, 10 baht per share

Number of Share Owned PTTEPI holds 73,060,000 ordinary shares

12. Moattama Gas Transportation Company or MGTC

Location Clarendon House, 2 Church Street, Hamilton HM 11, Bermuda

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

Tel. (951) 650977, 650989

Fax (951) 650478, 650479

Type of Business Gas pipeline transportation in the Union of Myanmar

Percent of Interest PTTEPO holds 25.50%

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

Number of Share Owned PTTEPO holds 255,000 ordinary shares

13. Taninthayi Pipeline Company LLC or TPC

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

  Mailing Address Premier Petroleum Myanmar Limited, # 16 Shwetaung
  Kyar, Bahan 11201, Yangon, Union of Myanmar

  Tel (951) 526411-14, 525704

  Fax (951) 525698, 525684

  Type of Business Gas pipeline transportation in the Union of Myanmar

  Percent of Interest PTTEPO holds 19.31784%

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

  Number of Share Owned PTTEPO holds 19,317.84 ordinary shares

15.2 Share Registrar

Name Thailand Securities Depository Company Limited

Location SET Bldg. 4, 6-7 floor, 62 Ratchadapisek Rd.

  Klongtoey, Bangkok 10110, Thailand

Tel. 66 (0) 2229-2800

Fax 66 (0) 2359-1262-63

15.3 Trustee

  1. Yankee Bond

  Amount USD 200 million

  Name The Bank of New York

  Location 101 Barclay Street -7 E,

  New York, N.Y. 10286, U.S.A.

  Tel. (1 212) 495 1784

  2. Samurai Bond

  Amount Yen 23,000 million

  Name Sumitomo Mitsui Banking Corporation

  Location Yusen-Odenmacho Building,

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

  Tel. 81-3-5640-6634

  Fax. 81-3-5695-5202

15.4 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

15.5 Legal Consultant

Name Herbert Smith (Thailand) Limited

Address 1401 Abdulrahim Place

990 Rama IV, Bangkok 10500, Thailand

Tel. 66 (0) 2657-3888

Fax 66 (0) 2636-0657

15.6 Other Advisor

Name Ms. Sukon Kanchanalai

Address 188 Soi 16 South Tesbanimit Rd.,

Prachanivej I, Chutuchak District, Bangkok 10900, Thailand

Tel. 66 (0) 2589-5566

Fax 66 (0) 2537-4444