Exhibit 15.2
  
  DSR/jbi/LO108/2011/KK1670/KK1671/1688
    15th

    April, 2011  PetroChina Company Limited
       THIRD
    PARTY REPORT
    RESERVES ESTIMATION AND VALUATION OF SELECTED PETROLEUM
    ASSETS
    (ALGERIA, CHAD AND KAZAKHSTAN  PKKR &
    KOLZHAN)
    AS OF
    31st DECEMBER,

    2010
  INTRODUCTION
  st
  st
    st
    UNITED
    KINGDOM
    UNITED STATES
    SINGAPORE
    AUSTRALIA
    ARGENTINA
    BRAZIL
    KAZAKHSTAN
    RUSSIA




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##### 



METHODOLOGY
    rd st
  st http://www.sec.gov/rules/final/2010/33-8995fr.pdf sub-classifications.
  st
  12-month first-day-of-the 12-month 12-month
      st
  Appendix I.
 2




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##### 



1.
    RESULTS
    SUMMARY  1.1
    Net
    Reserves    12-month first-day-of-the 12-month
  NET
    ENTITLEMENT PROVED OIL RESERVES
    AS OF
    31st

    DECEMBER, 2010
  Proved


Proved


TotalCountry

Developed


Undeveloped


Proved(Mstb)


(Mstb)


(Mstb)ALGERIA


4,793



7,245



12,038CHAD






28,675



28,675KAZAKHSTANPKKR


90,651



5,115



95,766Kolzhan


4,961



2,922



7,883Subtotal Kazakhstan


95,612



8,038



103,650TOTAL CNODCI


100,405



43,958



144,363     Note:
  1.2
    Gross
    Volumes    GROSS
    PROVED OIL RESERVES
    AS OF
    31st

    DECEMBER, 2010
  Proved


Proved


TotalCountry

Developed


Undeveloped


Proved(Mstb)


(Mstb)


(Mstb)ALGERIA


9,789



14,795



24,584CHAD






32,772



32,772KAZAKHSTANPKKR


135,300



7,635



142,934Kolzhan


7,446



4,362



11,808Subtotal Kazakhstan


142,745



11,997



154,742TOTAL CNODCI


152,534



59,563



212,098     Note:
 3




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##### 



1.3
    Net
    Present Values  st
  NET
    PRESENT VALUES ATTRIBUTABLE TO CNODCI
    AS OF
    31st

    DECEMBER, 2010
    DISCOUNT RATE 10%
  Proved


Proved


TotalCountry

Developed


Undeveloped


Proved(U.S.$ MM)


(U.S.$ MM)


(U.S.$ MM)ALGERIA


54



57



IIICHAD






289



289KazakhstanPKKR


1,122



55



1,177Kolzhan


70



23



93Subtotal Kazakhstan


1,192



79



1,270TOTAL CNODCI


1,246



425



1,670     Notes:
  1.
    
    No opening tax positions or un-recovered balances are available.2.
    
    Totals may not add exactly due to rounding errors.  12-month first-day-of-the 12-month
  sub-sections
  1.4
    Sensitivity
    Analysis   4




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##### 



NET
    PRESENT VALUES ATTRIBUTABLE TO CNODCI
    SENSITIVITY RESULTS
    AS OF
    31st DECEMBER,

    2010
    DISCOUNT RATE 10%
  Proved


Proved


TotalCountry

Developed


Undeveloped


Proved(U.S.$ MM)


(U.S.$ MM)


(U.S.$ MM)ALGERIA


55



62



117CHAD






463



463KAZAKHSTANPKKR


1,617



83



1,700Kolzhan


97



40



137Subtotal Kazakhstan


1,714



123



1,837TOTAL CNODCI


1,769



648



2,417     Notes:
  1.
    
    No opening tax positions or un-recovered balances are available.2.
    
    Totals may not add exactly due to rounding errors.  2.
    BASIS OF
    OPINION          Yours
    faithfully,
 GAFFNEY,
    CLINE & ASSOCIATES (CONSULTANTS) PTE LTD
  
  David S.
    Ahye
    Regional Director, Asia Pacific
 5




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##### 



GCA
    APPENDIX I   APPENDIX I
    GLOSSARY




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##### 



List of
    Standard Oil Industry Terms and Abbreviations
  ABEX

Abandonment Expenditure

EOR

Enhanced Oil RecoveryACQ

Annual Contract Quantity

EUR

Estimated Ultimate Recovery°API

Degrees API (American

FDP

Field Development PlanPetroleum Institute)

FEED

Front End Engineering and DesignAAPG

American Association of

FPSO

Floating Production, Storage andPetroleum Geologists



OffloadingAVO

Amplitude versus Offset

FSO

Floating Storage and OffloadingA$

Australian Dollars

ft

Foot/feetB

Billion
    (I09)

Fx

Foreign Exchange RateBbl

Barrels

g

gram/Bbl

per barrel

g/cc

grams per cubic centimetreBbbl

Billion Barrels

gal

gallonBHA

Bottom Hole Assembly

gal/d

gallons per dayBHC

Bottom Hole Compensated

G&A

General and Administrative costsBscf or Bcf

Billion standard cubic feet

GBP

Pounds SterlingBscf/d or Bcf/d

Billion standard cubic feet per day

GDT

Gas Down toBm3

Billion cubic metres

GIIP

Gas initially in placebcpd

Barrels of condensate per day

Gj

Gigajoules (one billion Joules)BHP

Bottom Hole Pressure

GOR

Gas Oil Ratioblpd

Barrels of liquid per day

GTL

Gas to Liquidsbpd

Barrels per day

GWC

Gas water contactboe

Barrels of oil equivalent @xxx mcf/bbl

HDT

Hydrocarbons Down toboepd

Barrels of oil equivalent per day@

HSE

Health, Safety and Environmentxxx mcf/bbl

HSFO

High Sulphur Fuel OilBOP

Blow Out Preventer

HUT

Hydrocarbons up tobopd

Barrels oil per day

H2S

Hydrogen Sulphidebwpd

Barrels of water per day

IOR

Improved Oil RecoveryBS&W

Bottom sediment and water

IPP

Independent Power ProducerBTU

British Thermal Units

IRR

Internal Rate of Returnbwpd

Barrels water per day

J

Joule (Metric measurement ofCBM

Coal Bed Methane



energy. 1 kilojoule = 0.9478 BTU)CO2

Carbon Dioxide

k

PermeabilityCAPEX

Capital Expenditure

KB

Kelly BushingCCGT

Combined Cycle Gas Turbine

KJ

Kilojoules (one Thousand Joules)cm

centimetres

kl

KilolitresCMM

Coal Mine Methane

km

KilometresCNG

Compressed Natural Gas

km2

Square kilometresCp

Centipoise (a measure of viscosity)

kPa

Thousands of PascalsCSG

Coal Seam Gas



measurement of pressure)CT

Corporation Tax

KW

KilowattCum

Cumulative

KWh

Kilowatt hourDCQ

Daily Contract Quantity

LKG

Lowest Known GasDeg C

Degrees Celsius

LKH

Lowest Known Hydrocarbons I-1




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##### 



Deg F

Degrees Fahrenheit

LKO

Lowest Known OilDHI

Direct Hydrocarbon Indicator

LNG

Liquefied Natural GasDST

Drill Stem Test

LoF

Life of FieldDWT

Dead-weight ton

LPG

Liquefied Petroleum GasE&A

Exploration & Appraisal

LTI

Lost Time InjuryE&P

Exploration and Production

LWD

Logging while drillingEBIT

Earnings before Interest and Tax

m

MetresEBITDA

Earnings before interest, tax,

M

Thousanddepreciation and amortisation

m3

Cubic metresEI

Entitlement Interest

Mcf or Mscf

Thousand standard cubic feetEIA

Environmental Impact Assessment

MCM

Management Committee MeetingEMV

Expected Monetary Value

cf or scf

Standard Cubic FeetMMc for MMscf

Million standard cubic feet

cf/d or scf/d

Standard Cubic Feet per daym3d

Cubic metres per day

scf/ton

Standard cubic foot per tonMDT

Modular Dynamic Tester

SL

Straight line (for depreciation)mD

Measure of Permeability in

So

Oil Saturationmillidarcies

SPE

Society of Petroleum EngineersMD

Measured Depth

SPEE

Society of Petroleum EvaluationMean

Arithmetic average of a set of



Engineersnumbers

ss

SubseaMedian

Middle value in a set of values

stb

Stock tank barrelMFT

Multi Formation Tester

STOIIP

Stock tank oil initially in placemg/l

milligrames per litre

Sw

Water SaturationMJ

Megajoules (One Million Joules)

T

TonnesMm3

Thousand Cubic metres

TD

Total DepthMm3d

Thousand Cubic metres per day

Te

Tonnes equivalentMM

Million

THP

Tubing Head PressureMMbbl

Millions of barrels

TJ

Terajoules
    (IOl2Joules)MMBTU

Millions of British Thermal Units

Tscf or Tcf

Trillion standard cubic feetMode

Value that exists most frequently in

TCM

Technical Committee Meetinga set of values = most likely

TOC

Total Organic CarbonMscf/d

Thousand standard cubic feet per day

TOP

Take or PayMMscf/d

Million standard cubic feet per day

Tpd

Tonnes per dayMW

Megawatt

TVD

True Vertical DepthMWD

Measuring While Drilling

TVDss

True Vertical Depth SubseaMWh

Megawatt hour

USGS

United States Geological Surveymya

Million years ago

U.S.$

United States DollarNGL

Natural Gas Liquids

VSP

Vertical Seismic ProfilingN2

Nitrogen

WC

Water CutNPV

Net Present Value

Wl

Working InterestOBM

Oil Based Mud

WPC

World Petroleum CouncilOCM

Operating Committee Meeting

WTI

West Texas IntermediateODT

Oil down to

wt%

Weight percentOPEX

Operating Expenditure

IH05

First half (6 months) of 2005
    (example of date) I-2




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##### 



OWC

Oil Water Contactp.a.

Per annum

2Q06

Second quarter (3 months) of 2006Pa

Pascals (metric measurement of



(example of date)pressure)

2D

Two dimensionalP&A

Plugged and Abandoned

3D

Three dimensionalPD

Proved Developed

4D

Four dimensionalPDP

Proved Developed Producing

IP

Proved ReservesPDNP

Proved Developed Non-producing

2P

Proved plus Probable ReservesPI

Productivity Index

3P

Proved plus Probable plus PossiblePJ

Petajoules(l015

    Joules)



ReservesPSDM

Post Stack Depth Migration

%

Percentagepsi

Pounds per square inchpsia

Pounds per square inch absolutepsig

Pounds per square inch gaugePUD

Proved UndevelopedPVT

Pressure volume temperaturePIO

10% ProbabilityP50

50% ProbabilityP90

90% ProbabilityRF

Recovery factorRFT

Repeat Formation TesterRT

Rotary TableRw

Resistivity of waterSCAL

Special core analysis  I-3