5. Asset used in Operation

Property, Plant and Equipment 

Oil and Gas Properties ¹

PTTEP and its subsidiaries’ properties mainly are jointly controlled oil
and gas properties in each project. Oil and Gas properties, which
located at each project, comprise land, buildings and construction,
machine and equipments including transportation pipeline, capitalized
exploratory and production drilling costs, property acquisition costs of
concession right which shall incur when PTTEP and its subsidiaries
acquire the concession right and decommissioning costs which have been
determined based on reviews and estimates by the Group’s own engineers
and managerial judgment.

As at December 31, 2009, PTTEP and its subsidiaries’ oil and gas
properties are represented as share of the joint ventures’ individual
assets for each project as follows:-

  ---------- ------------ ------------------------------------------ ----------------------
  PTTEP’s                                                            Company's interest (%)
  joint                                                              
  ventures                                                           

  1.         Unocal III                                              5

  2.         E 5                                                     20

  3.         Sinphuhorm                                              20
             (E 5-North)                                             

  4.         S 1                                                     25

  5.         Bongkot                                                 44.4445
             (Block B15,                                             
             B16, B17)                                               

  6.         Pailin                                                  45

  7.         Arthit                                                  80
             (Block B14A,                                            
             B15A, B16A)                                             

  8.         Arthit North                                            100

  PTTEPI’s                                                           Company's interest (%)
  joint                                                              
  ventures                                                           

  9.         Yetagun                                                 19.3178

  10.        G4/43                                                   21.375

  11.        Yadana                                                  25.50

  12.        Cambodia B                                              33.333334

  13.        MTJDA - B17                                             50
             ( Block B-17                                            
             and B-17-01)                                            

  14.        PTTEP1                                                  100

  15.        G9/43                                                   100

  16.        L 22/43                                                 100

  17.        Myanmar M3 &                                            100
             M4&M7                                                   

  18.        Myanmar M9 &                                            100
             M11                                                     

  PTTEPO’s                                                           Company's interest (%)
  joint                                                              
  venture                                                            

  19.                     B8/32 & 9A ²                               25.0010

  PTTEP SV’s                                                         
  joint                                                              
  venture                                                            

  20.        Vietnam                                                 7
             52/97                                                   
  ---------- ------------ ------------------------------------------ ----------------------

  ---------- --------- ------------------------------------------ ----------------------
  PTTEP KV’s                                                      Company's interest (%)
  joint                                                           
  venture                                                         

  21.        Vietnam B                                            8.5
             & 48/95                                              

  PTTEP HL’s                                                      Company's interest (%)
  joint                                                           
  venture                                                         

  22.        Vietnam                                              28.5
             16-1                                                 

  PTTEP HV’s                                                      Company's interest (%)
  joint                                                           
  venture                                                         

  23.        Vietnam                                              25
             9-2                                                  

  PTTEP OM’s                                                      Company's interest (%)
  joint                                                           
  venture                                                         

  24.        Oman 44                                              100

  25.        Oman 58                                              100

  PTTEP AG’s                                                      Company's interest (%)
  joint                                                           
  venture                                                         

  26.                  Algeria 433a & 416b                        35

  PTTEPT’s                                                        Company's interest (%)
  joint                                                           
  venture                                                         

  27.                  G4/48                                      5

  28.                  Bongkot (Block G12/48)                     44.4445

  29.                  Arthit (Block G9/48)                       84

  30.                  L53/43 & 54/43                             100

  PTTEPS’s                                                        Company's interest (%)
  joint                                                           
  venture                                                         

  31.                  Sinphuhorm (EU-1)                          20

  32.                  B6/27 ³                                    60

  33.                  L21, 28 & 29/48                            70

  34.                  S1                                         75

  35.                  A4, A5, A6/48                              100

  PTTEP IR’s                                                      Company's interest (%)
  joint                                                           
  venture                                                         

  36.                  Iran Saveh                                 100

  PTTEPB’s                                                        Company's interest (%)
  joint                                                           
  venture                                                         

  37.                  Indonesia Bengara-1                        40

  PTTEP TP’s                                                      Company's interest (%)
  joint                                                           
  venture                                                         

  38.                  Unocal III (Block G6/50)                   5

  39.                  Pailin (Block G7/50)                       45

  40.                  Arthit (Block G8/50)                       80

  PTTEP AO’s                                                      Company's interest (%)
  joint                                                           
  venture                                                         

  41.                  Australia AC/P36                           20

  42.                  Australia WA-423-P                         30

  PTTEP BH’s                                                      Company's interest (%)
  joint                                                           
  venture                                                         

  43.                  Bahrain 2                                  100
  ---------- --------- ------------------------------------------ ----------------------

+-----+---+-----------------------------------------+---------------------+
| PT  |   |                                         | Company's interest  |
| TEP |   |                                         | (%)                 |
| R’s |   |                                         |                     |
| jo  |   |                                         |                     |
| int |   |                                         |                     |
| v   |   |                                         |                     |
| ent |   |                                         |                     |
| ure |   |                                         |                     |
+-----+---+-----------------------------------------+---------------------+
| 44. |   | Rommana                                 | 30                  |
+-----+---+-----------------------------------------+---------------------+
| PT  |   |                                         | Company's interest  |
| TEP |   |                                         | (%)                 |
| SAE |   |                                         |                     |
| R’s |   |                                         |                     |
| jo  |   |                                         |                     |
| int |   |                                         |                     |
| v   |   |                                         |                     |
| ent |   |                                         |                     |
| ure |   |                                         |                     |
+-----+---+-----------------------------------------+---------------------+
| 45. |   | Sidi AbdEl Rahman Offshore              | 30                  |
+-----+---+-----------------------------------------+---------------------+
| PT  |   |                                         | Company's interest  |
| TEP |   |                                         | (%)                 |
| S   |   |                                         |                     |
| EMI |   |                                         |                     |
| II  |   |                                         |                     |
| L   |   |                                         |                     |
| imi |   |                                         |                     |
| ted |   |                                         |                     |
| ’s  |   |                                         |                     |
| jo  |   |                                         |                     |
| int |   |                                         |                     |
| v   |   |                                         |                     |
| ent |   |                                         |                     |
| ure |   |                                         |                     |
+-----+---+-----------------------------------------+---------------------+
| 46. |   | Indonesia Semai II                      | 33.33               |
+-----+---+-----------------------------------------+---------------------+
| PT  |   |                                         | Company's interest  |
| TEP |   |                                         | (%)                 |
| N   |   |                                         |                     |
| Z’s |   |                                         |                     |
| jo  |   |                                         |                     |
| int |   |                                         |                     |
| v   |   |                                         |                     |
| ent |   |                                         |                     |
| ure |   |                                         |                     |
+-----+---+-----------------------------------------+---------------------+
| 47. | N |                                         | 36                  |
|     | e |                                         |                     |
|     | w |                                         |                     |
|     | Z |                                         |                     |
|     | e |                                         |                     |
|     | a |                                         |                     |
|     | l |                                         |                     |
|     | a |                                         |                     |
|     | n |                                         |                     |
|     | d |                                         |                     |
|     | G |                                         |                     |
|     | r |                                         |                     |
|     | e |                                         |                     |
|     | a |                                         |                     |
|     | t |                                         |                     |
|     | S |                                         |                     |
|     | o |                                         |                     |
|     | u |                                         |                     |
|     | t |                                         |                     |
|     | h |                                         |                     |
+-----+---+-----------------------------------------+---------------------+
| PT  |   |                                         | Company's interest  |
| TEP |   |                                         | (%)                 |
| A   |   |                                         |                     |
| P’s |   |                                         |                     |
| jo  |   |                                         |                     |
| int |   |                                         |                     |
| v   |   |                                         |                     |
| ent |   |                                         |                     |
| ure |   |                                         |                     |
+-----+---+-----------------------------------------+---------------------+
| 48. |   | PTTEP Australasia                       |                     |
+-----+---+-----------------------------------------+---------------------+
|     |   | -   PTTEP Australasia (AC/L7, AC/L8,    | 100                 |
|     |   |     AC/P34 and AC/P40                   |                     |
+-----+---+-----------------------------------------+---------------------+
|     |   | -   PTTEP Australasia (AC/L1, AC/L2 and | 89.6875             |
|     |   |     AC/L3)                              |                     |
+-----+---+-----------------------------------------+---------------------+
|     |   | -   PTTEP Australasia (AC/RL7)          | 80                  |
+-----+---+-----------------------------------------+---------------------+
|     |   | -   PTTEP Australasia (AC/RL4, AC/RL5   | 75                  |
|     |   |     (Tenacious))                        |                     |
+-----+---+-----------------------------------------+---------------------+
|     |   | -   PTTEP Australasia (AC/P24)          | 60                  |
+-----+---+-----------------------------------------+---------------------+
|     |   | -   PTTEP Australasia (AC/RL6           | 50                  |
|     |   |     (Audacious))                        |                     |
+-----+---+-----------------------------------------+---------------------+
|     |   | -   PTTEP Australasia (AC/P4, AC/RL4,   | 35                  |
|     |   |     AC/RL5, AC/RL6, AC/P17 and AC/P32)  |                     |
+-----+---+-----------------------------------------+---------------------+
|     |   | -   PTTEP Australasia (WA378P, WA396P   | 20                  |
|     |   |     and WA397P)                         |                     |
+-----+---+-----------------------------------------+---------------------+

¹ See more detail in Attachment 3 - FAS69

  ² PTTEPO has shareholding in Orange Energy Limited and B8/32 Partners
  Limited, which hold project’s concessions.

  ³ Change its name from Nang Nuan Project. The sale of 40% interest to
  Nippon Oil Exploration Limited (NOEX) was approved by the Thai
  Government on July 27, 2009.

As at December 31, 2009, details of properties’ net book value are as
follows:-

Unit: Million Baht

  ----------------------- ------------ ------------ ----------- ---------- ---------------
  Properties, Plants and  Oil and Gas               Pipelines   Other      Consolidated*
  Equipments              Properties                                       Total

                          Proved       Unproved                            
                          Properties   Properties                          
                          and Related                                      
                          Producing                                        
                          Properties                                       

  Land                    42.77        1.45         -           102.86     147.08

  Building and            221.44       14.32        -           1,030.09   1,265.85
  Construction                                                             

  Acquisition Cost        10,911.92    1,289.38     -           -          12,201.30

  Geological and          2,221.67     22.98        -           -          2,244.65
  Geophysical Survey                                                       

  Exploration /           14,221.27    7,763.68     -           -          21,984.95
  Delineation Well                                                         

  Development Well        35,971.88    1,576.23     -           -          37,548.11

  Production Facilities   103,467.85   2,728.82     4,190.01    -          110,386.68

  Other Development Cost  5,479.50     65.10        -           -          5,544.60

  Decommissioning Cost    14,607.41    327.19       -           -          14,934.60

  Support Facilities and  574.25       53.62        -           381.34     1,009.21
  Other Assets                                                             

  Allowance for           (471.70)     (90.03)      -           -          (561.73)
  Impairment                                                               

  Total                   187,248.26   13,752.74    4,190.01    1,514.29   206,705.30
  ----------------------- ------------ ------------ ----------- ---------- ---------------

* Inter-company transaction have already been eliminated

Investments 

PTTEP and its subsidiaries’ investment lists are presented as follows:

+----------+------------+---------+------+-------+--------+----------+
| Company  | Type of    | Paid-in | %    | Cost  | Equity | Major    |
|          | Business   | Capital |      | M     | Method |          |
|          |            |         | of   | ethod |        |          |
|          |            |         | inte |       |        |          |
|          |            |         | rest |       |        |          |
+----------+------------+---------+------+-------+--------+----------+
|          |            | (       |      | (Mi   | (M     | sha      |
|          |            | Million |      | llion | illion | reholder |
|          |            | Baht)   |      | Baht) | Baht)  |          |
+----------+------------+---------+------+-------+--------+----------+
| Subs     |            |         |      |       |        |          |
| idiaries |            |         |      |       |        |          |
| company  |            |         |      |       |        |          |
+----------+------------+---------+------+-------+--------+----------+
| PTTEPI   | Petroleum  | 20,000  | 100  | 2     | 35,    | PTTEP    |
|          | E&P        |         |      | 0,000 | 746.46 | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEPO   | Commerce   | 0.17    | 75   | 0.13  | 15,    | PTTEP    |
|          |            |         |      |       | 790.36 | 75%      |
+----------+------------+---------+------+-------+--------+----------+
|          |            |         | 25   | 0.04  | 5,     | PTTEPI   |
|          |            |         |      |       | 273.35 | 25 %     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP SV | Petroleum  | 2.03    | 100  | 2.03  | (2     | PTTEPO   |
|          | E&P        |         |      |       | 47.76) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP KV | Petroleum  | 2.03    | 100  | 2.03  | (4     | PTTEPO   |
|          | E&P        |         |      |       | 27.83) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP HL | Petroleum  | 2.12    | 100  | 2.12  | (6,7   | PTTEPO   |
|          | E&P        |         |      |       | 65.96) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP HV | Petroleum  | 2.16    | 100  | 2.16  | (1,1   | PTTEPO   |
|          | E&P        |         |      |       | 67.98) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP OM | Petroleum  | 2.16    | 100  | 2.16  | (8     | PTTEPO   |
|          | E&P        |         |      |       | 36.54) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP AG | Petroleum  | 2.10    | 100  | 2.10  | (2,4   | PTTEPO   |
|          | E&P        |         |      |       | 39.42) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEPT   | Petroleum  | 100.00  | 100  | 1     | 28.88  | PTTEPI   |
|          | E&P        |         |      | 00.00 |        | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP    | Services   | 1.00    | 25   | 0.25  | 2.72   | PTTEP    |
| Services |            |         |      |       |        | 25%      |
+----------+------------+---------+------+-------+--------+----------+
|          |            |         | 75   | 1.59  | 1.28   | PTTEPT   |
|          |            |         |      |       |        | 75%      |
+----------+------------+---------+------+-------+--------+----------+
| PTTEPS   | Petroleum  | 100.00  | 51   | 3,8   | 6,     | PTTEP    |
|          | E&P        |         |      | 72.76 | 253.83 | 51%      |
+----------+------------+---------+------+-------+--------+----------+
|          |            |         | 49   | 3,7   | 6,     | PTTEPO   |
|          |            |         |      | 13.33 | 080.88 | 49%      |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP IR | Petroleum  | 1.91    | 100  | 1.91  | (2,1   | PTTEP OM |
|          | E&P        |         |      |       | 23.48) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
|   PTTEPM |  Petroleum |  2.05   | 100  | 2.05  | (4     | PTTEPO   |
|          | E&P        |         |      |       | 68.45) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP BH |  Petroleum | 1.90    | 100  | 1.90  | (3     | PTTEP OM |
|          | E&P        |         |      |       | 75.86) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| Company  | Type of    | Paid-in | % of | Cost  | Equity | Major    |
|          | Business   | Capital | inte | M     | Method |          |
|          |            |         | rest | ethod |        |          |
+----------+------------+---------+------+-------+--------+----------+
|          |            | (       |      | (Mi   | (M     | sha      |
|          |            | Million |      | llion | illion | reholder |
|          |            | Baht)   |      | Baht) | Baht)  |          |
+----------+------------+---------+------+-------+--------+----------+
| PTTEPH   |  Petroleum | 1.88    | 100  | 1.88  | (9,3   | PTTEPO   |
|          | E&P        |         |      |       | 26.88) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP ID |  Petroleum | 1.88    | 100  | 1.88  | (4     | PTTEPH   |
|          | E&P        |         |      |       | 49.61) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEPB   |  Petroleum | 1.88    | 100  | 1.88  | (2     | PTTEP ID |
|          | E&P        |         |      |       | 86.88) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP TP |  Petroleum | 1.00    | 100  | 1.00  | (      | PTTEPT   |
|          | E&P        |         |      |       | 16.35) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEPA   |  Petroleum | 0.25    | 100  | 0.25  | 0.10   | PTTEPS   |
|          | E&P        |         |      |       |        | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP EG |  Petroleum | 1.69    | 100  | 1.69  | (7     | PTTEPH   |
|          | E&P        |         |      |       | 20.86) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEPR   |  Petroleum | 1.69    | 100  | 1.69  | (      | PTTEP EG |
|          | E&P        |         |      |       | 53.64) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP    |  Petroleum | 1.69    | 100  | 1.69  | (6     | PTTEP EG |
| SAER     | E&P        |         |      |       | 64.51) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP AU |  Petroleum | 1.53    | 100  | 1.53  | (1,4   | PTTEPH   |
|          | E&P        |         |      |       | 99.27) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP AO |  Petroleum | 1.53    | 100  | 1.53  | (1,4   | PTTEP AU |
|          | E&P        |         |      |       | 92.24) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP BD |  Petroleum | 1.67    | 100  | 1.67  | (3     | PTTEPH   |
|          | E&P        |         |      |       | 37.91) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP    |  Petroleum | 1.59    | 100  | 1.59  | 1.45   | PTTEPH   |
| MYA ¹    | E&P        |         |      |       |        | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP NZ |  Petroleum | 1.70    | 100  | 1.70  | (4     | PTTEPH   |
|          | E&P        |         |      |       | 76.78) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP SM |  Petroleum | 1.74    | 100  | 1.74  | (1     | PTTEPID  |
|          | E&P        |         |      |       | 60.28) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP AP |  Petroleum | 1.20    | 100  | 1.20  | (5,8   | PTTEPH   |
| ^(***)   | E&P        |         |      |       | 33.44) | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| ATL ¹    |  Petroleum | 1.74    | 100  | 1.74  | 1.48   | PTTEPO   |
|          | E&P        |         |      |       |        | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP    |  Petroleum | 1.77    | 100  | 1.77  | 1.48   | PTTEPH   |
| WA¹      | E&P        |         |      |       |        | 100%     |
+----------+------------+---------+------+-------+--------+----------+
| As       |            |         |      |       |        |          |
| sociated |            |         |      |       |        |          |
| company  |            |         |      |       |        |          |
+----------+------------+---------+------+-------+--------+----------+
| EnCo     | Commerce   | 1       | 50   | 9     | 803.76 | PTTEP    |
|          |            | ,800.00 |      | 00.00 |        | 50%      |
+----------+------------+---------+------+-------+--------+----------+
|          |            |         |      |       |        | PTT 50%  |
+----------+------------+---------+------+-------+--------+----------+
| PTT ICT  | Services   | 150.00  | 20   | 30.00 | 40.03  | PTTEP    |
|          |            |         |      |       |        | 20%      |
+----------+------------+---------+------+-------+--------+----------+
|          |            |         |      |       |        | PTT 20%  |
+----------+------------+---------+------+-------+--------+----------+
|          |            |         |      |       |        | ATC 20%  |
+----------+------------+---------+------+-------+--------+----------+
|          |            |         |      |       |        | PTTCH    |
|          |            |         |      |       |        | 20%      |
+----------+------------+---------+------+-------+--------+----------+
|          |            |         |      |       |        | TOP 20%  |
+----------+------------+---------+------+-------+--------+----------+
| PTTEP    | Services   | 33.77   | 50   | 16.88 | 78.52  | PTTEP    |
| AP’s     |            |         |      |       |        | AAO 50%  |
+----------+------------+---------+------+-------+--------+----------+
|   As     |            |         |      |       |        |          |
| sociates |            |         |      |       |        |          |
+----------+------------+---------+------+-------+--------+----------+
| Jointly  |            |         |      |       |        |          |
| co       |            |         |      |       |        |          |
| ntrolled |            |         |      |       |        |          |
| entities |            |         |      |       |        |          |
+----------+------------+---------+------+-------+--------+----------+
| CPOC     | Petroleum  | 3.68    | 50   | 1.84  | 1.70   | PTTEPI   |
|          | E&P        |         |      |       |        | 50 %     |
+----------+------------+---------+------+-------+--------+----------+
|          |            |         |      |       |        | CARIGALI |
|          |            |         |      |       |        | 50%      |
+----------+------------+---------+------+-------+--------+----------+
| MGTC     | Natural    | 0.76    | 25.5 | 0.19  | 1,     | PTTEPO   |
|          | gas        |         |      |       | 521.84 | 25.50%   |
|          | pipelines  |         |      |       |        |          |
+----------+------------+---------+------+-------+--------+----------+
|          | - Overseas |         |      |       |        | UNOCAL   |
|          |            |         |      |       |        | 28.2625% |
+----------+------------+---------+------+-------+--------+----------+
|          |            |         |      |       |        | TOTAL    |
|          |            |         |      |       |        | 31.2375% |
+----------+------------+---------+------+-------+--------+----------+
|          |            |         |      |       |        | MOGE     |
|          |            |         |      |       |        | 15.0%    |
+----------+------------+---------+------+-------+--------+----------+
|          |            |         |      |       |        |          |
+----------+------------+---------+------+-------+--------+----------+

  ----------- ------------- ---------- ---------- ----------- ---------- -------------
  Company     Type of       Paid-in    % of       Cost Method Equity     Major
              Business      Capital    interest               Method     

                            (Million              (Million    (Million   shareholder
                            Baht)                 Baht)       Baht)      

  TPC         Natural gas   2.62       19.3178    445.33      1,347.68   PTTEPO
              pipelines                                                  19.3178%

              - Overseas                                                 PETRONAS
                                                                         40.9102%

                                                                         NIPPON
                                                                         19.3178%

                                                                         MOGE 20.4542%

  Orange      Petroleum E&P 100.00     53.9496    13,567.69   7,854.78   PTTEPO
                                                                         53.9496%

                                                                         MOECOI
                                                                         36.0504%

                                                                         PSI 10%

  B8/32       Petroleum E&P 110.00     25.0009    4,523.69    2,778.88   PTTEPO
  Partners                                                               25.0009%

                                                                         MOECOI
                                                                         16.7064%

                                                                         PSI 4.6346%

                                                                         Chevron
                                                                         53.6583%
  ----------- ------------- ---------- ---------- ----------- ---------- -------------

^(*) Including Orange Energy Limited which accounted for using
proportionate consolidation for jointly controlled entity

^(**) Associated companies including Enco, PTT ICT, ShoreAir Pty Ltd,
Troughton Island Pty Ltd and jointly controlled entities including CPOC,
MGTC, TPC and B8/32 Partners

^(***) Details of PTTEP AP’s subsidiaries are as follows:-

  ----------------------------------------- --------------- --------------
  Company                                   Registered      % of interest
                                            country         

  PTTEP Australia Browse Basin Pty Limited  Australia       100%
  (PTTEP AB)                                                

  PTTEP Australasia Pty Limited (PTTEP AA)  Australia       100%

  PTTEP Australasia Timor Sea Pty Limited   Australia       100%
  (PTTEP AT)                                                

  PTTEP Australasia (Finance) Pty Ltd       Australia       100%
  (PTTEP AAF)                                               

  PTTEP Australasia (Petroleum) Pty Ltd     Australia       100%
  (PTTEP AAP)                                               

  PTTEP Australasia (Tullian) Pty Ltd       Australia       100%
  (PTTEP AAT)                                               

  PTTEP Australasia (Operations) Pty Ltd    Australia       100%
  (PTTEP AAO)                                               

  PTTEP Australasia (Ashmore Cartier) Pty   Australia       100%
  Ltd (PTTEP AAA)                                           

  PTTEP Australasia (Staff) Pty Ltd (PTTEP  Australia       100%
  AAS)                                                      
  ----------------------------------------- --------------- --------------

¹ As of 31^(st) December 2009, PTTEPMYA, ATL and PTTEP WA have the
outstanding balance of share subscription receivable

Net Book Value

As at December 31, 2009, PTTEP’s net book value amounted to Baht 143,001
million or Baht 43.17 per share.