EXHIBIT 15.3

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 THIRD PARTY REPORT ON
RESERVES By GLJ Petroleum Consultants Ltd. -
(Independent Qualified Reserves Evaluator) This report is provided to satisfy the
requirements contained in Item 1202(a)(8) of U.S. Securities and Exchange
Commission Regulation S-K. The numbering of
items below corresponds to the requirements set out in Item 1202(a)(8) of
Regulation S-K. Terms to which a meaning is ascribed in Regulation S-K
and Regulation S-X have the same meaning in this
report. i.
    
    We have
      prepared an independent evaluation of the oil and gas reserves of Compton
      Petroleum Corporation (the "Company") for the management and the board of
      directors of the Company. The primary purpose of our evaluation report was
      to provide estimates of reserves information in support of the Companys
      year-end reserves reporting requirements under US Securities Regulation
      S-K and for other internal business and financial needs of the
      Company.ii.
    
    We have evaluated certain reserves of
      the Company as at December 31, 2012. The completion date of our report is
      February 11, 2013.iii.
    
    The following table sets forth the
      geographic area covered by our report, net proved reserves and net
      probable reserves estimated using constant prices and costs, and the
      proportion of the total company that we have
  evaluated.  Company Net
      ReservesNatural Gas
    
    Oil
    
    Proportion ofCanada
    
    Crude Oil
    
    Natural Gas
    
    Liquids
    
    Equivalent
    
    Oil Equivalent(Western Canada)
    
    
    Mbbl
    
    MMcf
    
    Mbbl
    
    Mbbl
    
    ReservesProved ReservesDeveloped
    producing
    
    705
    
    110,675
    
    1,555
    
    20,706Developed
      non-producing
    
    61
    
    2,190
    
    31
    
    457Undeveloped
    
    198
    
    13,480
    
    343
    
    2,788Total Proved
    
    963
    
    126,345
    
    1,929
    
    23,951
    
    87%Probable ReservesDeveloped
    
    271
    
    31,328
    
    514
    
    6,007Undeveloped
    
    204
    
    37,221
    
    639
    
    7,046Total Probable
    
    475
    
    68,549
    
    1,153
    
    13,052
    
    83%
  iv.
    
    As required under SEC Regulation S-K,
      reserves are those quantities of oil and gas that are estimated to be
      economically producible under existing economic conditions. As specified,
      in determining economic production, constant product reference prices have
      been based on a 12-month average price, calculated as the unweighted
      arithmetic average of the first-day-of-the-month price for each month
      within the 12-month period prior to the effective date of our report. The
      following table summarizes the average benchmark prices and the average
      realized prices. The following table summarizes the average benchmark
      prices and the average realized prices.




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Twelve Month Average Benchmark PricesBank of Canada Average Noon Exchange Rate
    ($US/$C)
    1.0002NYMEX WTI
    ($US/bbl)
    
    94.57Light, Sweet Crude Oil at Edmonton ($C/bbl)
    87.85Bow River Crude Oil at
      Hardisty ($C/bbl)
    76.70Henry Hub NYMEX ($US/MMbtu)
    
    2.76AECO/NIT Spot
      ($C/MMbtu)
    
    2.33Edmonton Propane ($C/bbl)
    
    30.29Edmonton Butane
      ($C/bbl)
    
    65.96Average Realized PricesLight/Medium Oil ($C/bbl)
    
    86.61Heavy Oil
    ($C/bbl)
    
    79.95Natural Gas ($/MMbtu)
    
    2.68Natural Gas Liquids
      ($C/bbl)
    
    69.39
  v.
    
    In our economic analysis,
      operating and capital costs are those costs estimated as applicable at the
      effective date of our report, with no future escalation. Where deemed
      appropriate, the capital costs and revised operating costs associated with
      the implementation of committed projects designed to modify specific field
      operations in the future may be included in economic
  projections.vi.
    
    Our report has been prepared
      assuming the continuation existing regulatory and fiscal conditions
      subject to the guidance in the COGE Handbook and SEC regulations.
      Notwithstanding that the Company currently has regulatory approval to
      produce the reserves identified in our report, there is no assurance that
      changes in regulation will not occur; such changes, which cannot reliably
      be predicted, could impact the Companys ability to recovery the estimated
      reserves.vii.
    
    Oil and gas reserves estimates
      have an inherent degree of associated uncertainty the degree of which is
      affected by many factors. Reserves estimates will vary due to the limited
      and imprecise nature of data upon which the estimates of reserves are
      predicated. Moreover, the methods and data used in estimating reserves are
      often necessarily indirect or analogical in character rather than direct
      or deductive. Furthermore, the persons involved in the preparation of
      reserves estimates and associated information are required, in applying
      geosciences, petroleum engineering and evaluation principles, to make
      numerous unbiased judgments based upon their educational background,
      professional training, and professional experience. The extent and
      significance of the judgments to be made are, in themselves, sufficient to
      render reserves estimates inherently imprecise. Reserves estimates may
      change substantially as additional data becomes available and as economic
      conditions impacting oil and gas prices and costs change. Reserves
      estimates will also change over time due to other factors such as
      knowledge and technology, fiscal and economic conditions, contractual,
      statutory and regulatory provisions.viii.
    
    To estimate the economically
      recoverable crude oil, natural gas and natural gas products reserves and
      related future net cash flows, we consider many factors and make
      assumptions including: expected reservoir characteristics based on
  geological, geophysical and engineering assessments;future production rates based on historical
  performance and expected future operating and investment activities;


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future products prices adjusted for quality and
  transportation differentials based on historical data;future operating costs based on historical
  data;assumed effects of regulation by governmental
  agencies; andfuture development capital costs. Our
estimates are prepared using standard geological and engineering methods
generally accepted by the petroleum industry, and the reserves definitions and
standards required by the United States SEC. The methods we used for estimating
reserves were volumetric calculations, material balance techniques, production
and pressure decline curve analysis, analogy with similar reservoirs, and
reservoir simulation. The method or combination of methods used is based on our
professional judgment and experience. Estimates may change substantially as
additional data from ongoing development activities and production performance
becomes available and as economic conditions impacting oil and gas prices and
costs change. The assumptions, data, method, and procedures that GLJ has used
for the preparation of our report are appropriate for the purposes served by the
report. ix.
    
    In our opinion, the reserves
      information evaluated by us have, in all material respects, been
      determined in accordance with all appropriate industry standards, methods
      and procedures applicable for the filing of reserves information under
      U.S. SEC Regulation S-K.x.
    
    A summary of the Company reserves
      evaluated by us is provided in item iii.xi.
    
    Myron J. Hladyshevsky, P. Eng.
      was the technical person primarily responsible for overseeing the
      preparation of Harvests reserves estimates. His certification of
      qualification has been attached as an Appendix to this
  report.   GLJ Petroleum Consultants
Ltd.Calgary, Alberta, CanadaMarch 22,
2013  Myron J. Hladyshevsky, P. Eng.Vice
President


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CERTIFICATION OF QUALIFICATION I, Myron J. Hladyshevsky, Professional
Engineer, 4100, 400 - 3rd Avenue S.W., Calgary, Alberta, Canada hereby certify: 1.
    
    That I am an employee of GLJ
      Petroleum Consultants Ltd., which company did prepare a detailed analysis
      of Canadian oil and gas properties of Compton Petroleum Corporation (the
      Company). The effective date of this evaluation is December 31,
      2012.2.
    
    That I do not have, nor do I
      expect to receive any direct or indirect interest in the securities of the
      Company or its affiliated companies.3.
    
    That I attended the University of
      Calgary and graduated with a Bachelor of Science Degree in Chemical
      Engineering in 1979; that I am a Registered Professional Engineer in the
      Province of Alberta; and, that I have in excess of thirty-three years
      experience in engineering evaluations of Western Canadian oil and gas
      fields.4.
    
    That a personal field inspection
      of the properties was not made; however, such an inspection was not
      considered necessary in view of the information available from public
      information and records, the files of the Company, and the appropriate
      provincial regulatory authorities.


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