Attachment 3: Supplemental Information on Petroleum Exploration and
Production Activities under the US Financial Accounting Standard no. 69
(FAS 69) and other information - Unaudited

(1) PTTEP and its Subsidiaries’ Petroleum Reserves Report As of December
31, 2005

The total Proved Reserves of PTT Exploration and Production Public
Company Limited (PTTEP) and its Subsidiaries as of December 31, 2005 are
shown in the attached table. The Proved Reserves are reviewed annually
by company’s earth scientists and reservoir engineers to ensure rigorous
professional standards. The Proved Reserves are reported on a gross
basis, which includes the company’s net working interest and related
host country’s interest.

No reserve quantities have been recorded for the company on Blocks B,
48/95, 52/97, 9-2, and 16-1 Projects in offshore Vietnam, Block G4/43 in
Gulf of Thailand and Block 433a&416b in Algeria because no commercial
arrangement has been established for the discoveries.

The total Proved Reserves (Consolidated Companies) as of December 31,
2005 of PTTEP and its subsidiaries are 151 Million Stock Tank Barrels
(MMSTB) for crude oil and condensate, and 5,158 Billion Standard Cubic
Feet (BSCF) for gas. The total Proved Reserves (Consolidated Companies)
in term of oil equivalent is 950 Million Barrels (MMBOE).

The total production in 2005 (Consolidated Companies) is 67 MMBOE or
equivalent to the production rate of approximately 184,000 Barrels of
Oil Equivalent per Day (BOED), approximately 30,000 BOED or 19% increase
from last year. The production increase was mainly attributed to the
increase of petroleum production from Yetagun and Pailin projects, the
production from Nang Nuan project, and the interest acquisition of B8/32
& 9A project.

[TABLE]

(1) The Proved Reserves are reported on a gross basis which includes the
    company's net working interest and the related host country
    interest.

(2) Includes JDA Project

(3) PTTEP singed the Gas Sale Agreement (GSA) for Oman block 44 project,
    and Phu Horm project. Also, the GSA of Bongkot project was amended
    to cover Ton Koon and Ton Nokyoong Area in 2005.

(4) PTTEP acquired 25% interest of B8/32 & 9A Project, and started
    production from Nang Nuan Project (100% interest).

(5) As at 17^(th) February 2005, PTTEPO sold its entire shareholdings in
    New Links to Encore Int’l Limited.

 (2) Capitalized costs relating to oil and gas producing activities

Capitalized costs represent cumulative expenditures for proved and
unproved properties, and support equipment and facilities used in oil
and gas exploration and production operations together with related
accumulated depreciation, depletion and amortization.

Proved properties include exploration & development wells, equipment,
transportation pipeline and related producing facilities associated with
proved reserves project. Unproved properties represent amounts
associated with non-proved reserve project. Support equipment and
facilities include warehouse, field offices, vehicles and movable assets
used in oil and gas producing activities.

The net capitalized costs represent the undepreciated value for these
assets.

  ------------------------------------------ ------------ ---------------
  (Million Baht)                             2005         2004

  Proved properties                          151,965      100,341

  Unproved properties                        3,326        1,755

  Accrued decommissioning costs              7,254        5,875

  Support equipment and facilities           2,483        620

  Gross capitalized costs                    165,029      108,591

  Accumulated depreciation, depletion, and   (67,220)     (46,561)
  amortization                                            

  Net capitalized costs                      97,809       62,030

  Capitalized costs of equity company ⁽⁶⁾    -            10,358
  ------------------------------------------ ------------ ---------------

(6) Represents PTTEP’s share of net capitalized costs of investment in
    Medco

(3) Costs Incurred in oil and gas property acquisition, exploration, and
development activities

Costs incurred represent amounts both capitalized and charged to expense
during the year. Property acquisition costs include costs to purchase
proved and unproved properties.

Exploration costs include the costs of geological and geophysical work,
carrying and retaining undeveloped properties, and drilling and
equipping exploratory wells.

Development costs include costs associated with drilling and equipping
development wells, improved recovery systems, facilities for extraction,
treating, gathering and storage, producing facilities for existing
developed reserves, and costs associated with transportation pipeline.

+------------------------+-------+-------+------+-------+------+-----+
|                        | 2005  |       |      | 2004  |      |     |
+------------------------+-------+-------+------+-------+------+-----+
| (Million Baht)         | Dom   | Fo    | T    | Dom   | For  | To  |
|                        | estic | reign | otal | estic | eign | tal |
+------------------------+-------+-------+------+-------+------+-----+
| Acquisition of         |       |       |      |       |      |     |
| properties             |       |       |      |       |      |     |
+------------------------+-------+-------+------+-------+------+-----+
| - Proved               | 1     | -     | 19   | 5,597 | -    | 5,  |
|                        | 9,736 |       | ,736 |       |      | 597 |
+------------------------+-------+-------+------+-------+------+-----+
| - Unproved             | -     |   243 | 243  | 44    |      | 259 |
|                        |       |       |      |       |  215 |     |
+------------------------+-------+-------+------+-------+------+-----+
| Exploration costs ⁽⁷⁾  | 2,705 |       | 6    | 1,036 |      | 1,  |
|                        |       | 3,863 | ,569 |       |  475 | 511 |
+------------------------+-------+-------+------+-------+------+-----+
| Development costs      | 1     |       | 17   | 5,606 |      | 6,  |
|                        | 5,016 | 2,787 | ,803 |       |  786 | 392 |
+------------------------+-------+-------+------+-------+------+-----+
| Total                  | 3     |       | 44   | 1     |   1  | 13, |
|                        | 7,457 | 6,893 | ,351 | 2,283 | ,476 | 759 |
+------------------------+-------+-------+------+-------+------+-----+
| Costs incurred of      | -     |   -   | -    | -     |   6  | 6,  |
| equity Company⁽⁸⁾      |       |       |      |       | ,725 | 725 |
+------------------------+-------+-------+------+-------+------+-----+
|                        |       |       |      |       |      |     |
+------------------------+-------+-------+------+-------+------+-----+

(7) Exploration costs include transferring of exploration well costs to
    development well costs for future production.

(8) Represents PTTEP’s share of costs incurred of investment in Medco
    accounted for under equity method

(4) Results of operation for producing activities

Results of operations from oil and gas producing activities for the year
2005 and 2004 are shown in the following table.

Operating costs include lifting costs incurred to operate and maintain
productive wells and related equipment. Exploration expenses consist of
geological and geophysical costs, and dry hole costs. General
administrative expenses are expenses directly related to oil and gas
producing activities. Depreciation, Depletion and Amortization expense
relates to capitalized costs incurred in acquisition, exploration and
development activities, transportation pipeline, including amortized
decommissioning costs.

Other income/expenses include pipeline transportation income and foreign
exchange gains and losses.

  Income tax expenses are based on the tax effects arising from the
  operations.

  General corporate overhead and interest costs are excluded from the
  results of operations.

+-------------------------------+------+-----+------+-----+-----+-----+
|                               | 2005 |     |      | 2   |     |     |
|                               |      |     |      | 004 |     |     |
+===============================+======+=====+======+=====+=====+=====+
| (Million Baht)                | Dome | F   | T    | Do  | F   | To  |
|                               | stic | ore | otal | mes | ore | tal |
|                               |      | ign |      | tic | ign |     |
+-------------------------------+------+-----+------+-----+-----+-----+
| Gross revenues :              |      |     |      |     |     |     |
+-------------------------------+------+-----+------+-----+-----+-----+
|  Total Sales                  | 56   | 10, | 66   | 39, | 6,  | 46, |
|                               | ,331 | 027 | ,358 | 299 | 900 | 199 |
+-------------------------------+------+-----+------+-----+-----+-----+
| Expenses :                    |      |     |      |     |     |     |
+-------------------------------+------+-----+------+-----+-----+-----+
| Operating expenses            | 4    | 641 | 5    | 2,  | 642 | 3,  |
|                               | ,708 |     | ,349 | 945 |     | 587 |
+-------------------------------+------+-----+------+-----+-----+-----+
| Exploration expenses          | 585  | 628 | 1    | 107 | 294 | 401 |
|                               |      |     | ,213 |     |     |     |
+-------------------------------+------+-----+------+-----+-----+-----+
|   General administrative      | 1    | 537 | 1    | 782 | 446 | 1,  |
|   expenses                    | ,459 |     | ,996 |     |     | 228 |
+-------------------------------+------+-----+------+-----+-----+-----+
|   Petroleum royalties and     | 7    | 1,  | 8    | 4,  | 754 | 5,  |
|   remuneration                | ,911 | 071 | ,982 | 914 |     | 668 |
+-------------------------------+------+-----+------+-----+-----+-----+
| Depreciation, depletion and   | 8    | 830 | 9    | 7,  | 642 | 7,  |
| amortization                  | ,355 |     | ,185 | 291 |     | 933 |
+-------------------------------+------+-----+------+-----+-----+-----+
| Other (income)/ expenses      | 525  | (   | (1,  | (1  | (   | (   |
|                               |      | 2,0 | 492) | 18) | 1,6 | 1,7 |
|                               |      | 17) |      |     | 09) | 27) |
+-------------------------------+------+-----+------+-----+-----+-----+
| Total expenses                | 23   | 1,  | 25   | 15, | 1,  | 17, |
|                               | ,543 | 690 | ,233 | 921 | 169 | 090 |
+-------------------------------+------+-----+------+-----+-----+-----+
|   Results before income taxes | 32   | 8,  | 41   | 23, | 5,  | 29, |
|                               | ,788 | 337 | ,125 | 378 | 731 | 109 |
+-------------------------------+------+-----+------+-----+-----+-----+
| Income tax expenses           | 14   | 2,  | 16   | 9,  | 1,  | 11, |
|                               | ,096 | 558 | ,654 | 766 | 704 | 470 |
+-------------------------------+------+-----+------+-----+-----+-----+
| Net results of operations     | 18   | 5,  | 24   | 13, | 4,  | 17, |
|                               | ,692 | 779 | ,471 | 612 | 027 | 639 |
+-------------------------------+------+-----+------+-----+-----+-----+
| Results of operations of      | -    | (5  | (    | -   | 154 | 154 |
| equity company⁽⁹⁾             |      | 38) | 538) |     |     |     |
+-------------------------------+------+-----+------+-----+-----+-----+

  ⁽⁹⁾Represents PTTEP’s share of results of operations of investment in
  Medco

  As at 17^(th) February 2005, PTTEPO sold its entire shareholdings in
  New Links and the loss on divestment amounting to Baht 578 million.

(5) Standardized Measure of Discounted Future Net Cash Flows Relating to
Proved Oil and Gas Reserves

The standardized measure of discounted future net cash flows, related to
the above proved oil and gas reserves, is computed by applying year-end
prices of oil and gas (with consideration of price changes only to the
extent provided by contractual arrangements) to the estimated future
production of year-end proved oil and gas reserves remaining less
estimated future expenditures (based on year-end costs) to be incurred
in developing and production the proved reserves, discounted using a
rate of 10% per year to reflect the estimated timing of the future cash
flows. Future income taxes are calculated by applying the appropriate
year-end statutory tax rates to the future pre tax net cash flows and
reduced by applicable tax deductions or tax credits.

Discounted future cash flow estimates like those shown below are not
intended to represent estimates of the fair value of oil and gas
properties. Estimates of fair value should also consider probable and
possible which may become proved reserves in the future, anticipated
future oil and gas prices, interest rates, changes in development and
production costs and risks associated with future production. Because of
these and other considerations, any of fair value is necessarily
subjective and imprecise.

+-------------------+------+------+------+------+-------+----------+
| (Million Baht)    | Dome |      | For  |      | Total |          |
|                   | stic |      | eign |      |       |          |
+-------------------+------+------+------+------+-------+----------+
|                   | 2005 | 2004 | 2005 | 2004 | 2005  | 2004     |
+-------------------+------+------+------+------+-------+----------+
| Future cash       | 595  | 444  | 201  | 162  | 79    | 606,571  |
| inflows           | ,612 | ,327 | ,518 | ,244 | 7,130 |          |
+-------------------+------+------+------+------+-------+----------+
| Future production | (84, | (61, | (23, |      | (108  | (82,332) |
| costs             | 948) | 511) | 684) | (20, | ,632) |          |
|                   |      |      |      | 821) |       |          |
+-------------------+------+------+------+------+-------+----------+
| Future            | (    | (    | (9,  | (6,  | (136  | (        |
| development costs | 126. | 108, | 447) | 530) | ,383) | 115,502) |
|                   | 936) | 972) |      |      |       |          |
+-------------------+------+------+------+------+-------+----------+
| Future income tax | (    | (90, | (61, | (50, | (199  | (        |
| expenses          | 138, | 534) | 384) | 059) | ,967) | 140,593) |
|                   | 583) |      |      |      |       |          |
+-------------------+------+------+------+------+-------+----------+
| Future net cash   | 245  | 183  | 107  | 84   | 35    | 268,144  |
| flows             | ,145 | ,310 | ,003 | ,834 | 2,148 |          |
+-------------------+------+------+------+------+-------+----------+
| 10% annual        | (95, | (83, | (56, | (47, | (152  | (        |
| discount          | 739) | 998) | 859) | 576) | ,598) | 131,574) |
+-------------------+------+------+------+------+-------+----------+
| Standardized      |      |      |      |      |       |          |
| measure of        |      |      |      |      |       |          |
| discounted        |      |      |      |      |       |          |
+-------------------+------+------+------+------+-------+----------+
| future net cash   | 149  | 99   | 50   | 37   | 19    | 136,570  |
| flows (SMDCF)     | ,406 | ,312 | ,144 | ,258 | 9,550 |          |
+-------------------+------+------+------+------+-------+----------+
| SMDCF of equity   | -    | -    | -    | 5    | -     | 5,587    |
| company ⁽¹⁰⁾      |      |      |      | ,587 |       |          |
+-------------------+------+------+------+------+-------+----------+
| Total SMDCF       | 149  | 99   | 50   | 42   | 19    | 142,157  |
|                   | ,406 | ,312 | ,144 | ,845 | 9,550 |          |
+-------------------+------+------+------+------+-------+----------+

(10) Represents PTTEP’ s share of discounted future net cash flows of
     investment in Medco.

Changes in Standardized Measure of Discounted Future Net Cash Flows
Relating to Proved Oil and Gas Reserves

  ---------------------------------------------- ----------- ------------
  (Million Baht)                                 2005        2004

  Present value at beginning of year             136,570     116,326

  Sales and transfers of oil and gas produced,   (47,731)    (31,759)
  net of production costs                                    

  Development costs incurred during the period   16,621      6,782

  Net changes in prices and production costs     127,762     38,127

  Net changes in development costs               (18,377)    (15,079)

  Extensions, discoveries and improved recovery  26,079      272

  Revisions of previous quantity estimates       1,936       (5,923)

  Purchases / sales of petroleum in place        36,907      43,448

  Accretions of discount                         (20,843)    (5,337)

  Net changes in income taxes                    (59,374)    (10,287)

  Present value at the year end                  199,550     136,570
  ---------------------------------------------- ----------- ------------

(6) Other information

  Productive Oil and Gas Wells

  The numbers of productive wells at December 31, 2005 were as follows:

+-----------------------------------+----------+------+-------+-------+
|                                   | Oil      |      | Gas   |       |
+-----------------------------------+----------+------+-------+-------+
|                                   | Gross    | Net  | Gross | Net   |
+-----------------------------------+----------+------+-------+-------+
| Thailand                          | 360      | 210  | 6     | 160   |
|                                   |          |      | 01⁽¹⁾ |       |
+-----------------------------------+----------+------+-------+-------+
| Foreign                           |          |      |       |       |
+-----------------------------------+----------+------+-------+-------+
| Southeast Asia                    | -        | -    | 22    | 5     |
+-----------------------------------+----------+------+-------+-------+
| Total                             | 360      | 210  | 623   | 165   |
+-----------------------------------+----------+------+-------+-------+

(1) The numbers of 248 production wells produce both crude oil and Gas.

  Drilling in Progress

  The numbers of oil and gas wells in progress at December 31, 2005 were
  as follows:

  Exploratory

+-----------------------------------+-------+-----------+------------+
|                                   |       | Gross     | Net        |
+-----------------------------------+-------+-----------+------------+
| Thailand                          |       | -         | -          |
+-----------------------------------+-------+-----------+------------+
| Foreign                           |       |           |            |
+-----------------------------------+-------+-----------+------------+
| Southeast Asia                    |       | 2         | 0.8        |
+-----------------------------------+-------+-----------+------------+
| Middle East and Others            |       | 2         | 1.3        |
+-----------------------------------+-------+-----------+------------+
| Total                             |       | 4         | 2.1        |
+-----------------------------------+-------+-----------+------------+

  Development

+-----------------------------------+-------+-----------+------------+
| Thailand                          |       | 21        | 6          |
+-----------------------------------+-------+-----------+------------+
| Foreign                           |       |           |            |
+-----------------------------------+-------+-----------+------------+
| Southeast Asia                    |       | -         | -          |
+-----------------------------------+-------+-----------+------------+
| Total                             |       | 21        | 6          |
+-----------------------------------+-------+-----------+------------+

  Net Oil and Gas Wells Drilled Annually in 2005

  Exploratory

+-----------------------------------+-------+-------------+-----------+
|                                   |       | Net         | Net dry   |
|                                   |       | Productive  |           |
|                                   |       | wells       | well      |
|                                   |       | drilled     | drilled   |
+-----------------------------------+-------+-------------+-----------+
| Thailand                          |       | 9.2         | 1         |
+-----------------------------------+-------+-------------+-----------+
| Foreign                           |       |             |           |
+-----------------------------------+-------+-------------+-----------+
| Southeast Asia                    |       | 0.5         | 0.2       |
+-----------------------------------+-------+-------------+-----------+
| Middle East and Others            |       | 3.7         | 0.7       |
+-----------------------------------+-------+-------------+-----------+
| Total                             |       | 13.4        | 1.9       |
+-----------------------------------+-------+-------------+-----------+

  Development

+-----------------------------------+-------+-----------+------------+
| Thailand                          |       | 72        | -          |
+-----------------------------------+-------+-----------+------------+
| Foreign                           |       |           |            |
+-----------------------------------+-------+-----------+------------+
| Southeast Asia                    |       | -         | -          |
+-----------------------------------+-------+-----------+------------+
| Total                             |       | 72        | -          |
+-----------------------------------+-------+-----------+------------+

  Gross wells include the total number of wells in which the company has
  an interest. Net wells are the sum of the company’s fractional
  interests in gross wells

Attachment 4: Quarterly Information in 2005 and 2004 (unaudited) for the
consolidated financial statement

+--------------------------+---+------+---+------+---+--------+---+---------+
| (Unit : Million Baht)    |   |      |   |      |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Year 2005                |   | 4thQ |   | 3rdQ |   | 2ndQ   |   | 1stQ    |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Revenues                 |   |      |   |      |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Sales                    |   | 20   |   | 19   |   | 14,092 |   | 12,679  |
|                          |   | ,404 |   | ,183 |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Revenue from pipeline    |   | 563  |   | 518  |   | 472    |   | 444     |
| transportation           |   |      |   |      |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Other revenues           |   |      |   |      |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Gain on foreign exchange |   | 39   |   | -    |   | -      |   | 178     |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Gain on divestment       |   | 507  |   | -    |   | -      |   | -       |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Interest income          |   | 178  |   | 154  |   | 203    |   | 174     |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Other revenues           |   | 35   |   | 30   |   | 21     |   | 23      |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Share of profit from     |   | 67   |   | 101  |   | 8      |   | 31      |
| investments accounted    |   |      |   |      |   |        |   |         |
|                          |   |      |   |      |   |        |   |         |
| for under equity method  |   |      |   |      |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Total revenues           |   | 21   |   | 19   |   | 14,796 |   | 13,528  |
|                          |   | ,793 |   | ,986 |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Expenses                 |   |      |   |      |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Operating expenses       |   | 2    |   | 1    |   | 1,031  |   | 833     |
|                          |   | ,004 |   | ,481 |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Exploration expenses     |   | 382  |   | 358  |   | 299    |   | 174     |
+--------------------------+---+------+---+------+---+--------+---+---------+
| General administrative   |   | 916  |   | 845  |   | 613    |   | 544     |
| expenses                 |   |      |   |      |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Petroleum royalties and  |   | 3    |   | 2    |   | 1,699  |   | 1,551   |
| remuneration             |   | ,221 |   | ,357 |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Other expenses           |   |      |   |      |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Depreciation, depletion  |   | 2    |   | 2    |   | 2,035  |   | 2,030   |
| and amortization         |   | ,960 |   | ,414 |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Director’s remuneration  |   | 29   |   | 2    |   | 2      |   | 2       |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Loss on foreign exchange |   | -    |   | 14   |   | 1      |   | -       |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Loss on divestment       |   | -    |   | -    |   | -      |   | 578     |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Total expenses           |   | 9    |   | 7    |   | 5,680  |   | 5,712   |
|                          |   | ,512 |   | ,471 |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Income before interest   |   | 12   |   | 12   |   | 9,116  |   | 7,816   |
| and income taxes         |   | ,281 |   | ,515 |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Interest expenses        |   | 342  |   | 349  |   | 340    |   | 324     |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Income taxes             |   | 5    |   | 4    |   | 3,296  |   | 3,238   |
|                          |   | ,122 |   | ,983 |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Net income               |   | 6    |   | 7    |   | 5,480  |   | 4,254   |
|                          |   | ,817 |   | ,183 |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Earnings per share       |   |      |   |      |   |        |   |         |
| (Baht)                   |   |      |   |      |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Basic earnings per share |   | 1    |   | 1    |   | 8.39   |   | 6.51    |
|                          |   | 0.41 |   | 0.98 |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+
| Diluted earnings per     |   | 1    |   | 1    |   | 8.37   |   | 6.50    |
| share                    |   | 0.38 |   | 0.96 |   |        |   |         |
+--------------------------+---+------+---+------+---+--------+---+---------+

+---------------------------+---+------+---+------+---+--------+---+---------+
| (Unit : Million Baht)     |   |      |   |      |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Year 2004                 |   | 4thQ |   | 3rd  |   | 2nd Q  |   | 1stQ    |
|                           |   |      |   | Q    |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Revenues                  |   |      |   |      |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Sales                     |   | 12   |   | 12   |   | 11,097 |   | 10,139  |
|                           |   | ,894 |   | ,069 |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Revenue from pipeline     |   | 415  |   | 419  |   | 404    |   | 358     |
| transportation            |   |      |   |      |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Other revenues            |   |      |   |      |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Gain on foreign exchange  |   | 727  |   | -    |   | -      |   | 105     |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Interest income           |   | 85   |   | 53   |   | 37     |   | 42      |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Other revenues            |   | 19   |   | 39   |   | 22     |   | 15      |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Share of profit from      |   | 94   |   | 176  |   | 49     |   | -       |
| investments accounted     |   |      |   |      |   |        |   |         |
|                           |   |      |   |      |   |        |   |         |
| for under equity method   |   |      |   |      |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Total revenues            |   | 14   |   | 12   |   | 11,609 |   | 10,659  |
|                           |   | ,234 |   | ,756 |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Expenses                  |   |      |   |      |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Operating expenses        |   | 955  |   | 978  |   | 853    |   | 800     |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Exploration expenses      |   | 133  |   | 97   |   | 131    |   | 40      |
+---------------------------+---+------+---+------+---+--------+---+---------+
| General administrative    |   | 627  |   | 466  |   | 341    |   | 520     |
| expenses                  |   |      |   |      |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Petroleum royalties       |   | 1    |   | 1    |   | 1,399  |   | 1,255   |
|                           |   | ,574 |   | ,440 |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Other expenses            |   |      |   |      |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Depreciation, depletion   |   | 2    |   | 1    |   | 2,083  |   | 2,046   |
| and amortization          |   | ,081 |   | ,895 |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Director's remuneration   |   | 19   |   | 2    |   | 3      |   | 1       |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Loss on foreign exchange  |   | -    |   | 206  |   | 514    |   | -       |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Other expenses            |   | 11   |   | 67   |   | 23     |   | 18      |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Share of loss from        |   | -    |   | -    |   | -      |   | 110     |
| investments accounted     |   |      |   |      |   |        |   |         |
|                           |   |      |   |      |   |        |   |         |
| for under equity method   |   |      |   |      |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Total expenses            |   | 5    |   | 5    |   | 5,347  |   | 4,791   |
|                           |   | ,400 |   | ,151 |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Income before interest    |   | 8    |   | 7    |   | 6,262  |   | 5,868   |
| and income taxes          |   | ,834 |   | ,605 |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Interest expenses         |   | 338  |   | 350  |   | 340    |   | 331     |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Income taxes              |   | 3    |   | 3    |   | 2,645  |   | 2,159   |
|                           |   | ,396 |   | ,144 |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Net income                |   | 5    |   | 4    |   | 3,277  |   | 3,378   |
|                           |   | ,100 |   | ,111 |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Earnings per share (Baht) |   |      |   |      |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Basic earnings per share  |   | 7.81 |   | 6.30 |   | 5.02   |   | 5.18    |
+---------------------------+---+------+---+------+---+--------+---+---------+
| Diluted earnings per      |   | 7.78 |   | 6.29 |   | 5.02   |   | 5.17    |
| share                     |   |      |   |      |   |        |   |         |
+---------------------------+---+------+---+------+---+--------+---+---------+

Five-year financial summary

[TABLE]

Five-year financial summary (continuous)

  --------------------------- -- ---------- -- ---------- -- --------- -- --------- -- ----------
  (Unit : Million Baht)                                                                

                                 2005          2004          2003         2002         2001

  Consolidated Balance Sheets                                                          

  Current Assets                 42,551        36,159        27,198       20,836       20,405

  Non-current Assets             100,766       75,786        65,378       63,557       57,324

  Total Assets                   143,317       111,945       92,576       84,393       77,729

  Current Liabilities            36,527        15,445        9,250        10,384       14,734

  Non-current Liabilities        35,093        39,401        37,652       35,553       31,884

  Total Liabilities              71,620        54,846        46,902       45,937       46,618

  Shareholders’ Equity           71,697        57,099        45,674       38,456       31,111

  Total Liabilities and          143,317       111,945       92,576       84,393       77,729
  Shareholders’ Equity                                                                 

  Consolidated Statements of                                                           
  Cash Flows                                                                           

  Cash flows from operating      48,719        26,236        16,179       16,122       20,588
  activities                                                                           

  Cash flows from investing      (32,745)      (17,071)      (9,142)      (7,001)      (16,954)
  activities                                                                           

  Cash flows from financing      (9,258)       (4,297)       (4,019)      (7,911)      (4,770)
  activities                                                                           

  Net increase (decrease) in     6,716         4,868         3,018        1,210        (1,136)
  cash and cash equivalents                                                            

  Cash and cash equivalents      23,778        19,063        16,306       15,209       16,527
  as of the beginning date                                                             

                                 30,494        23,931        19,324       16,419       15,391

  Effects of exchange            13            (153)         (261)        (113)        (182)
  differences                                                                          

  Cash and cash equivalents      30,507        23,778        19,063       16,306       15,209
  as of the closing date                                                               
  --------------------------- -- ---------- -- ---------- -- --------- -- --------- -- ----------

  Five-year petroleum sales volume and unit price summary

[TABLE]

Attachment 5: Audit Committee Report 2005

The Audit Committee is composed of 3 Independent Directors with
knowledge, expertise and experience in finance & accounting, law, and
related technical practices; it is chaired by Mr. Nopadon Mantajit, with
Mr. Prasit Kovilaikool and Mr. Charnchai Musignisakorn as members.

On October 4, 2005, Mr. Nopadon Mantajit resigned as a member of the
Board of Directors, the Chairman of the Audit Committee and an
independent director. To replace him, the Board of Directors appointed
Mr. Anucha Sihanatkathakul to be an Audit Committee member and appointed
Mr. Charnchai Musignisakorn to be the Chairman of the Audit Committee,
effective from October 21, 2005.

All Audit Committee members performed their duties and responsibilities
as assigned by the Board of Directors in accordance with PTTEP’s Audit
Committee Charter. During 2005, the Audit Committee held 15 meetings,
completing the work items which are summarized below :

(1) Reviewed the quarterly and annual financial statements with PTTEP
    management and the External Auditor (The Office of the Auditor
    General) with comments and recommendations to ensure the accuracy
    and creditability of the financial information as well as sufficient
    and timely disclosure of significant matters to meet the accounting
    standards and requirements of relevant laws and regulations.

(2) Reviewed PTTEP performance to ensure the Company’s compliance with
    the securities and stock exchange laws, the Stock Exchange of
    Thailand’s rules and regulations and other laws related to PTTEP’s
    business.

(3) Considered and supported the disclosure of any connected
    transactions to ensure accuracy and completeness together with the
    opinion that they were reasonably executed for the benefit of
    shareholders. PTTEP also issued a quarterly Management Discussion
    and Analysis Report (MD&A), which is useful for all investors.

(4) Considered and approved the additional agenda items as assigned by
    the Board of Directors.

(5) Considered and approved the annual internal audit plan, reviewed the
    internal audit report and evaluated the internal control system to
    ensure that internal control system was functioning effectively,
    with acceptable level of risk and in appropriate manner for the
    changing business environment.

(6) Considered and proposed that the Office of the Auditor General
    continue to serve as PTTEP’s external auditor; also considered and
    decided upon the relevant audit fees for 2005.

(7) Reviewed PTTEP risk management and made suggestion to help minimize
    those risks.

(8) Reviewed and proposed that the Board of Directors revise the Audit
    Committee Charter B.E. 2542

(9) Assessed the Audit Committee’s 2005 performance by completing a
    self–assessment and by soliciting feedback from the Board of
    directors and related parties to improve overall committee
    effectiveness. The result of the assessment revealed that the
    structure, qualifications, meetings and performance of the Audit
    Committee remain effective.

(10) Establish 2005 Key Performance Indicators of the Audit Committee.

The Audit Committee regularly submitted all Minutes of the meetings to
the Board of Directors.

In conclusion, the Audit Committee performed its assigned duties and
responsibilities related to Corporate Governance in 2005 with care,
knowledge and independence at its fullest ability, as well as providing
forthright opinions to all parties for the benefit of PTTEP,
shareholders and stakeholders in an appropriate manner.

Charnchai Musignisakorn

(Mr. Charnchai Musignisakorn)
Chairman of the Audit Committee

December 23, 2005

Attachment 6: Details of Current Projects

1.  Thailand E&P Projects

(1) Bongkot Project (Block B15,B16,B17)

  Location: Gulf of Thailand, approximately 180 kms. offshore Songkhla
  Province.

Petroleum Field: Bongkot

  Participation: 1988

  Production Start up: 1993

  Concession: No. Date Condition

  5/2515/9 15 March 1990 Thailand I

  Supplementary No.10

  Partners: PTTEP 44.4445%

  TotalFinaElf Exploration & Production Thailand 33.3333%

  BG Asia Pacific PTE Ltd. 22.2222%

  Operator: PTTEP

  Phase: Production

  Type of Petroleum: Natural Gas and Condensate

  Bongkot Project (Block B 13/38)

  Location: South of Bongkot

  Petroleum Field: Bongkot

  Participation: -

  Production Start up: 2007

  Concession: No. Date Condition

  2/2539/49 27 June 1996 Thailand III

  Supplementary No.3

  Partners: PTTEP 44.4445%

  TotalFinaElf Exploration and Production Thailand 33.3333%

  BG Asia Pacific PTE Ltd. 22.2222%

  Operator: PTTEPI

  Phase: Exploration

(2) S1 Project

  Location: Sukhothai, Phitsanulok and Kamphaengpet Province

  Petroleum Field: Sirikit Main, Sirikit East, Sirikit West, Pru
  Kratiam, Pratu Tao, Thap Raet, Nong Tum, Kui Ma Muang and Wat Taen

  Participation: 1985

  Production Start up: 1983

  Concession: No. Date Condition

  1/2522/16 21 October 1985 Thailand I

  Supplementary no. 1

  Partners: PTTEPS 75%

  PTTEP 25%

  Operator: PTTEPS

  Phase: Production

  Type of Petroleum: Crude Oil, LPG and Natural Gas

(3) E5 Project

  Location: Khon Khaen Province, Thailand

  Petroleum Field: Nam Phong

  Participation: 1990

  Production Start up: 1990

  Concession: No. Date Condition

  2/2522/17 29 August 1990 Thailand I

  Supplementary no. 2

  Partners: ExxonMobil Exploration and Production Khorat Inc. 80%

  PTTEP 20%

  Operator: ExxonMobil Exploration and Production Khorat Inc.

  Phase: Production

  Type of Petroleum: Natural Gas

(4) Unocal III Project

  Location: Gulf of Thailand, Offshore Surat Thani Province

  Petroleum Field: Funan, Jakrawan, Gomin, Surat, Plamuk, Trat,
  Pakarang, Yala

  Participation: 1990

  Production Start up: 1992

  Concession: No. Date Condition

  1/2515/5 26 September 1990 Thailand I

  Supplementary no. 8

  No. Date Condition

  2/2515/6 26 September 1990 Thailand I

  Supplementary no. 5

  Partners: Chevron Thailand Exploration and Production Ltd. 71.25%

  Moeco 23.75% PTTEP 5.00%

  Operator: Chevron Thailand Exploration and Production Ltd.

  Phase: Production

  Type of Petroleum: Crude Oil, Condensate and Natural Gas

(5) Pailin Project (Block 12/27)

  Location: Gulf of Thailand, Offshore Songkhla Province

  Petroleum Field: South Pailin, North Pailin, Nil, Morakot, Ubon,
  Patai, Tub-Tim

  Participation: 1993

  Production Start up: 1999

  Concession: No. Date Condition

  1/2529/33 20 April 1994 Thailand I

  Supplementary no. 5

  Partners: PTTEP 45%

  Chevron Thailand Exploration and Production Ltd. 35%

  Amerada Hess 15%

  Motodeco 5%

  Operator: Chevron Thailand Exploration and Production Ltd

  Phase: Production

  Type of Petroleum: Condensate and Natural Gas

(6) Arthit Project (B14a, B15a, B16a)

  Lacation: Gulf of Thailand

  Petroleum Field: Arthit

  Participation: 1999

  Production Start up: 2007

  Concession: No. Date Condition

  3/2515/7 1 June 1999 Thailand I

  5/2515/9 1 June 1999 Thailand I

  Supplementary No.9 & 12

  Partners: PTTEP 80%

  Unocal Thailand Ltd. 16%

  Moeco Thailand Company Limited 4%

  Operator: PTTEP

  Phase: Exploration and Development

  Type of Petroleum: Natural Gas and Condensate

(7) Phu horm Project (E5 North Project)

  Location: Udonthani Province

  Petroleum Field: Phu Horm

  Participation: 1990

  Concession: No. Date Condition

  2/2522/17 26 March 1979 Thailand I

  2/2522/17 24 June 2004

  Supplementary no. 5

  Partners: Amerada Hess (Thailand) Ltd. 35%

  APICO LLC 35%

  PTTEP 20%

  ExxonMobil Exploration and Production Khorat Inc 10%

  Operator: Amerada Hess (Thailand) Ltd.

  Phase: Exploration

  Type of Petroleum: Natural Gas and Condensate

  Phu horm Project (EU-1 Project)

  Location: Udonthani Province

  Petroleum Field: Phu Horm

  Participation: 2004

  Concession: No. Date Condition

  1/2524/19 3 June 1981 Thailand I

  1/2524/19 31 January 2005

  Supplementary no. 4

  Partners: Amerada Hess (Thailand) Ltd. 35%

  APICO LLC 35%

  PTTEPS 20%

  ExxonMobil Exploration and Production Khorat Inc. 10%

  Operator: Amerada Hess (Thailand) Ltd.

  Phase: Exploration

  Type of Petroleum: Natural Gas and Condensate

(8) PTTEP 1 Project

  Location: Kampaeng Saen Nakhon Pathom province and Muang District
  Suphan Buri province

  Petroleum Field: Kampaeng Saen , U-Thong and Sang Kajai

  Participation: 1993

  Production Start up: 1991

  Concession: No. Date Condition

  2/2528/27 5 February 1985 Thailand III

  Partners: PTTEPI 100%

  Operator: PTTEPI

  Phase: Production

  Type of Petroleum: Crude Oil

(9) B8/32 Project

  Location: Gulf of Thailand, Offshore

  Petroleum Field: Tantawan, Non-Tantawan (Benchamas, Maliwan, Jamjuree,
  Chaba)

  Participation: 2005

  Production Start up: 1997

  Concession: No. Date Condition

  1/2534/36 6 March 1998 Thailand III

  Supplementary no. 3

  Partners: Tantawan Production Area

  Chevron Offshore Thailand Ltd. 44.34146%

  Orange Energy Ltd. 46.34147%

  Palang Sophon Ltd. 7.31707%

  Palang Sophon Two Ltd. 2.00000%

  Non-Tantawan Production Area

  Chevron Offshore Thailand Ltd. 29.66667%

  Orange Energy Ltd. 31.66667%

  B8/32 Partners Ltd. 31.66666%

  Palang Sophon Ltd. 5.00000%

  Palang Sophon Two Ltd. 2.00000%

  Operator: Chevron Offshore Thailand Ltd.

  Phase: Production

  Type of Petroleum: Crude Oil Blend and Natural Gas

9A Project

  Location: Gulf of Thailand, Offshore

  Petroleum Field: Rajapreuk

  Participation: 2005

  Production Start up: 2005

  Concession: No. Date Condition

  4/2515/8 24 February 1976 Thailand I

  Supplementary no. 8

  Partners: Chevron Offshore Thailand Ltd. 44.34146%

  Orange Energy Ltd. 46.34147%

  Palang Sophon Ltd. 7.31707%

  Palang Sophon Two Ltd. 2.00000%

  Operator: Chevron Offshore Thailand Ltd.

  Phase: Production

  Type of Petroleum: Crude Oil Blend and Natural Gas

  Remarks: 1. The Shareholders of Orange Energy Ltd. are as follow

  PTTEPO 53.94960%

  MOECO 36.05040%

  Palang Sophon International 10.00000%

  2. The Shareholders of B8/32 Partners Ltd. are as follow

  Chevron Offshore Thailand Ltd. 46.34182%

  PTTEP 25.00091%

  MOECO 16.70636%

  Palang Sophon Ltd. 7.31636%

  Palang Sophon International 4.63455%

(10) Nang Nuan Project (Block 6/27)

  Location: Gulf of Thailand, 25 kilometers East of Savee Sub-District
  Chumporn Province

  Petroleum Field: Nang Nuan

  Participation: -

  Production Start up: 2005

  Concession: No. Date Condition

  3/2528/28 6 February 1979 Thailand I

  Partners: PTTEPS 100%

  Operator: PTTEPS

  Phase: Production

  Type of Petroleum: Crude Oil

(11) L22/43 Project

  Location: Phitsanulok Province and Pichit Province

  Petroleum Field: -

  Participation: 2003

  Concession: No. Date Condition

  2/2546/59 17 July 2003 Thailand III

  Concession Date: 17 July 2003

  Exploration Period: 2 obligation periods and 3 years for each period

  Production Period: 20 years from the day following the data of
  termination of the petroleum exploration period

  Partners: PTTEPI 100%

  Operator: PTTEPI

  Phase: Exploration

  Type of Petroleum: Crude Oil

(12) G4/43 Project

  Location: Gulf of Thailand, off the coast of Prachuap Khirikhan
  Province

  Petroleum Field: -

  Participation: 2003

  Concession: No. Date Condition

  4/2546/61 17 July 2003 Thailand III

  Concession Date: 17 July 2003

  Exploration Period: 2 obligation periods and 3 years for each period

  Production Period: 20 years from the day following the data of
  termination of the petroleum exploration period

  Partners: Chevron Offshore Thailand Ltd. 60%

  Moeco 25%

  PTTEPI 15%

  Operator: Chevron Offshore Thailand Ltd.

  Phase: Exploration

  Type of Petroleum: Crude Oil, Condensate and Natural Gas

(13) L53/43 & L54/43 Project

  Location: Suphan Buri, Ayuthaya, Ang Thong, Kanchanaburi provinces

  Petroleum Field: -

  Participation: 2004

  Production Start up: -

  Concession: No. Date Condition

  2/2547/68 22 January 2004 Thailand III

  Concession Date: 22 January 2004

  Exploration Period: 2 obligation periods and 3 years for each period

  Production Period: 20 years from the day following the data of
  termination of the petroleum exploration period

  Partners: PTTEPT 100%

  Operator: PTTEPT

  Phase: Exploration

  Type of Petroleum: Crude Oil

2.  Exploration and Production Regional Project

(1) CTJDA Project (Block G9/43)

  Location: Overlapping Area Thailand & Cambodia

  Petroleum Field: -

  Participation: 2003

  Concession: No. Date

  8/2546/65 17 July 2003

  On the process of negotiation on this disputed areas

  Partners: PTTEPI 100%

  Operator: PTTEPI

  Phase: Exploration

(2) MTJDA Project (Block B 17 และ C 19)

  Location: South of the Gulf of Thailand

  Petroleum Field: South Muda Tapee Jengka Amrit Mari West Jengka East
  Jengka South Jengka

  Participation: 1994

  Production Sharing Agreement:

  Date of Agreement: 21 April 1999 (Supplementary No.1)

  Period Of Agreement: 35 years from the date of Agreement

  Partners: PTTEPI 50%

  Petronas Carligali (JDA) 50%

  Phase: Exploration and Development

  Type of Petroleum: Natural Gas and Condensate

  Remark: Carligari PTTEP International Operating Company was
  established to be the joint-operator of JDA Project with PTTEP and
  Petronas Carligali invested by 50:50.

  MTJDA Project (Block B17-01)

  Location: South of the Gulf of Thailand

  Petroleum Field: -

  Participation: 2004

  Production Sharing Agreement:

  Date of Agreement: 30 September 2004

  Partners: PTTEPI 50%

  Petronas Carligali (JDA) 50%

  Phase: Exploration and Development

  Type of Petroleum: Natural Gas and Condensate

  Remark: Carligari PTTEP International Operating Company was
  established to be the joint-operator of JDA Project with PTTEP and
  Petronas Carligali invested by 50:50.

(3) Myanmar M3 & M4 Project

  Location: Gulf of Moattama , Myanmar

  Petroleum Field: -

  Concession: No. Date Condition

  M3: 394/2004 07 August 2004 PSC

  M4: 395/2004 07 August 2004 PSC

  Production Sharing Agreement

  Date of Agreement: 7 August 2004

  Period of Agreement: 6 years

  Period of Data Study: 1 year

  Period of Exploration: 3 years after the Data Study Period with
  allowance of 2 extension periods of one year each.

  Period of Production: 20 years after the final day of the development
  or production or according to the petroleum sales/purchase agreement.

  Partners: PTTEPI 100%

  Operator: PTTEPI

  Phase: Exploration

  Type of Petroleum: Natural Gas and Condensate

(4) Yadana Project (Block M5 M6)

  Location: Gulf of Moattama, Myanmar

  Petroleum Field: Yadana, Badamyar, Sein

  Participation: 1995

  Production Start up: 1998

  Concession: No. Date Condition

  M5&M6: 055/92 8 July 1992 PSC

  Production Sharing Agreement:

  Date of Agreement: July 9, 1992

  Period of Agreement: 20 years or expiration of gas Sales/Purchase
  Agreement or 30 years from 1 August 1998

  Period of Exploration: 3 years

  Period of Production: 30 years as according to the Sales/Purchase
  Agreement

  Partners: Total Exploration and Production Myanmar 31.24%

  Unocal Myanmar Offshore Co., Ltd. 28.26%

  PTTEPI 25.50% and MOGE 15.00%

  Operator: Total Exploration and Production Myanmar

  Phase: Production

  Type of Petroleum: Natural Gas

(5) Yetagun Project (M 12, M 13, M 14)

  Location: Gulf of Moattama, Myanmar

  Petroleum Field: Yetagun

  Participation: 1997

  Production Start up: 2000

  Concession: No. Date Condition

  M13: 024/90 3 May 1990 PSC

  M14: 025/90 3 May 1990 PSC

  M12: 061/90 28 September 1992 PSC

  Production Sharing Agreement:

  Date of Agreement: September 29, 1992 (Block M12)

  May 3, 1990 (Block M 13 and Block M14)

  Period of Agreement: 20 years or expiration of gas Sales/Purchase
  Agreement or 30 years from 13 March 1997

  Period of Exploration: 3 years with 2 extension periods of one year
  each.

  Period of Production: 30 years as according to the Sales/Purchase
  Agreement

  Partners: Petronas Carigali Myanmar Inc. 30.00140%

  MOGE 20.45414%

  Nippon Oil Exploration (Myanmar) Ltd. 19.31784%

  PTTEPI 19.31784%

  Petronas Carigali Myanmar (Hong Kong) Ltd. 10.90878%

  Operator: Petronas Carigali Myanmar (Hong Kong) Ltd.

  Phase: Production

  Type of Petroleum: Natural Gas and Condensate

(6) Myanmar M7& M9 Project

  Location: Gulf of Moattama, Myanmar

  Petroleum Field: -

  Production Start up: 2011

  Concession: No. Date Condition

  M7: 381/2003 12 November 2003 PSC

  M9: 382/2003 12 November 2003 PSC

  Production Sharing Agreement:

  Date of Agreement: 12 November 2003

  Period of Agreement: 6 years

  Period of Data Study: 1 year

  Period of Exploration: 3 years after the Data Study Period with
  allowance of 2 extension periods of one year each.

  Period of Production: 20 years after the final day of the development
  or production or according to the petroleum sales/purchase agreement.

  Partners: PTTEPI 100%

  Operator: PTTEPI

  Phase: Exploration

  Type of Petroleum: Natural Gas

(7) Myanmar M11 Project

  Location: Gulf of Moattama , Myanmar

  Petroleum Field: -

  Concession: No. Date Condition

  M11 : 405/2005 25 July 2005 PSC

  Production Sharing Agreement:

  Date of Agreement: 25 July 2005

  Period of Agreement: 6 years

  Period of Data Study: 1 year

  Period of Exploration: 3 years after the Data Study Period with
  allowance of 2 extension periods of one year each.

  Period of Production: 20 years after the final day of the development
  or production or according to the petroleum sales/purchase agreement.

  Partners: PTTEPI 100%

  Operator: PTTEPI

  Phase: Exploration

  Type of Petroleum: Natural Gas

(8) Cambodia B Project

  Location: Offshore Cambodia, east of Thai-Cambodian overlapping claims
  Area

  Petroleum Filed: -

  Participation: 7 November 2005

  Production Sharing Agreement:

  Date of Agreement: 7 November 2005

  Period of Exploration: 3 years with 2 two-year extension periods

  Period of Production: 30 years after first commercial production

  Partners: PTTEPI 30%

  Resourceful Petroleum Ltd. 30%

  SPC Cambodia Ltd. 30%

  CE Cambodia B Ltd. 10%

  Operator: PTTEPI

  Phase: Exploration

(9) Vietnam B& 48/95 Project

  Location: In the Gulf of Thailand, to the west of Vietnam

  Petroleum Field: Kim Long Argul

  Participation: 2000

  Production Start up: 2010

  Production Sharing Agreement:

  Date of Agreement: 8 August 2000

  Partners: Unocal Vietnam Exploration Limited. 42.38%

  Moeco Vietnam Petroleum Limited. 25.62%

  PetroVietnam Vietnam Exploration and Production. 23.50%

  PTTEP Kim Long Vietnam Company Limited 8.50%

  Operator: Unocal Vietnam Exploration Limited.

  Phase: Exploration

  Type of Petroleum: Natural Gas and Condensate

(10) Vietnam 52/97 Project

  Location: In the Gulf of Thailand, to the west of Vietnam

  Petroleum Field: Carvoy Arguy

  Participation: 2000

  Production Start up: 2010

  Production Sharing Agreement:

  Date of Agreement: 19 October 1999

  Period of Agreement: 30 years

  Partners: Unocal Southwest Vietnam Exploration

  and Production Ltd. 43.40%

  Moeco Southwest Vietnam Petroleum Ltd. 19.60%

  PetroVietnam Exploration and Production Company 30.00%

  PTTEPSV 7.00%

  Operator: Unocal Southwest Vietnam Exploration and Production Ltd.

  Phase: Exploration

  Type of Petroleum: Natural Gas

(11) Vietnam 9-2 Project

  Location: Offshore to the South East of Vang Tau of Vietnam

  Petroleum Field: CaNguVang and Ca Ong Doi

  Participation: 2002

  Production Start up: 2007

  Production Sharing Agreement:

  Date of Agreement: 21 December 2000

  Period of Agreement: 25 years

  Partners: PetroVietnam Exploration and Production Company 50%

  Soco Vietnam Limited 25%

  PTTEP HV 25%

  Phase: Exploration

  Type of Petroleum: Crude Oil

  Remark: Hoang Vu Joint Operating Company was established to be the
  joint- operator of Project Block 9-2

(12) Vietnam 16-1 Project

  Location: Offshore to the South East of Vang Tau of Vietnam

  Petroleum Field: TGT, TGV, T

  Participation: 2002

  Production Start up: 2008

  Production Sharing Agreement:

  Date of Agreement: 8 December 1999

  Period of Agreement: 25 years

  Partners: PetroVietnam Exploration and Production Company 41%

  PTTEP Hoang-Long Company Limited 28%

  Soco Vietnam Limited 28%

  OPECO Vietnam 2%

  Phase: Exploration

  Type of Petroleum: Crude Oil

  Remark: Hoang-Long Joint Operating Company was established to be the
  joint- operator of Project Block 16-1.

3.  International Exploration and Production Projects

(1) Indonesia Merangin-I Project

  Location: Onshore Central Sumatra, Indonesia

  Participation: 2005

  Production Sharing Agreement:

  Date of Agreement: 14 October 2005

  Period of Agreement: 30 Years

  Period of Exploration: 3-6 years

  Partners: PT. Medco E&P Merangin 41%

  PTTEPO 39%

  MOECO Merangin Co., Ltd. 20%

  Operator: PT. Medco E&P Merangin

  Phase: Exploration

  Type of Petroleum: Crude Oil

(2) Iran Saveh Project

  Location: Northern part of Central Iran Basin, approximately 200 km.
  south of Tehran

  Petroleum Field: Saveh

  Participation: 2005

  Concession: Date Condition

  8 June 2005 - 2D seismic program

  - 1 Exploration well

  - Total budget of 14.5 millions USD.

  Production Sharing Agreement:

  Date of Agreement: 30 April 2005

  Period of Agreement: 4 Years

  Partners: PTTEP IR 100%

  Operator: PTTEP IR

  Type of Petroleum: Crude oil

(3) Oman 44 Project

  Location: Oman onshore approximately 300 k.m. west of Mascat

  Petroleum Field: Shoms and Munhamir

  Participation: 2002

  Production Start up: 2005

  Concession Date: 27 August 2002

  Production Sharing Agreement:

  Date of Agreement: 21 July 2002

  Period of Agreement: 30 years

  Partners: PTTEP OM 100%

  Operator: PTTEP OM

  Phase: Exploration

  Type of Petroleum: Crude Oil, Natural Gas and Condensate

(4) Algeria 433a & 416b Project

  Location: South-east of Algeria

  Petroleum Field: Bir Seba and Bir El Atrech

  Participation: 2004

  Production Sharing Agreement:

  Date of Agreement: 10 July 2002

  Period of Agreement: 25years

  Partners: Petrovietnam Investment and Development Company Ltd. 40%

  PTTEP AG 35%

  SONATRACH 25%

  Operator: Petrovietnam Investment and Development Company Limited

  Phase: Exploration

  Type of Petroleum: Crude Oil