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                                                                    EXHIBIT 4

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                KPMG LLP
                CHARTERED ACCOUNTANTS         Telephone (403) 691-8000
                200-205 5 Avenue SW           Fax       (403) 691-8008
                Calgary AB T2P 4B9            Internet  www.kpmg.ca


            AUDITORS' REPORT ON RECONCILIATION TO UNITED STATES GAAP

To the Board of Directors of
Canadian Superior Energy Inc.

On March 31, 2005, we reported on the consolidated balance sheets of Canadian
Superior Energy Inc. as at December 31, 2004 and 2003 and the consolidated
statements of operations and deficit and cash flows for each of the years
then ended which are included in the annual report on Form 40-F. In
connection with our audits conducted in accordance with Canadian generally
accepted auditing standards of the aforementioned consolidated financial
statements, we also have audited the related supplemental note entitled
"Reconciliation with United States Generally Accepted Accounting Principles"
included in the Form 40-F. This supplemental note is the responsibility of
the Company's management. Our responsibility is to express an opinion on this
supplemental note based on our audits.

In our opinion, such supplemental note, when considered in relation to the
basic consolidated financial statements taken as a whole, presents fairly, in
all material respects, the information set forth therein.


[KPMG SIGNATURE]

Chartered Accountants

Calgary, Canada
March 31, 2005



KPMG LLP, a Canadian owned limited liability partnership, is the Canadian
member firm of KPMG International, a Swiss association

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[KPMG LOGO]

                KPMG LLP
                CHARTERED ACCOUNTANTS         Telephone (403) 691-8000
                200-205 5 Avenue SW           Fax       (403) 691-8008
                Calgary AB T2P 4B9            Internet  www.kpmg.ca


                   COMMENTS BY AUDITORS FOR U.S. READERS ON
                 CANADA - UNITED STATES REPORTING DIFFERENCES

In the United States, reporting standards for auditors require the addition of
an explanatory paragraph (following the opinion paragraph) when there is a
change in accounting principles that has a material effect on the comparability
of the Company's financial statements, such as the change described in note 2 to
the consolidated financial statements as at December 31, 2004 and 2003 and for
the years then ended. Our report to the shareholders dated March 31, 2005 is
expressed in accordance with Canadian reporting standards, which do not require
a reference to such a change in accounting principles in the auditors' report
when the change is properly accounted for and adequately disclosed in the
financial statements.


[KPMG SIGNATURE]

Chartered Accountants

Calgary, Canada
March 31, 2005



KPMG LLP, a Canadian owned limited liability partnership, is the Canadian
member firm of KPMG International, a Swiss association

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                         CANADIAN SUPERIOR ENERGY INC.
                         Supplementary Information Note

                     Years ended December 31, 2004 and 2003
             (Tabular amounts are in thousands of Canadian dollars
                           except per share amounts)

The following supplemental information is provided in accordance with the
Securities Exchange Act of 1934 as required for companies reporting on Form
40-F under the Multi-Jurisdictional Disclosure System.

RECONCILIATION WITH UNITED STATES GENERALLY ACCEPTED ACCOUNTING PRINCIPLES

The Company follows Canadian generally accepted accounting principles
(Canadian GAAP) which differs in some respects with generally accepted
accounting principles in the United States (U.S. GAAP). Significant
differences in accounting principles that impact the Company's financial
statements are described below:

<Table>
<Caption>
                                                                                      2004             2003*
                                                                          -----------------  ----------------
<S>                                                                       <C>                <C>
Net loss in accordance with Canadian GAAP, as reported                           $  (3,024)         $   (952)
Flow Through Shares (a)
   Income Taxes                                                                       (417)           (3,757)
Property Acquisitions (b)
   Depletion, amortization and accretion expense                                       599               525
   Income taxes                                                                       (206)             (189)
Ceiling Test (c)
   Write down of petroleum and natural gas properties                              (10,000)          (34,100)
   Income Taxes                                                                      1,439            12,089
   Depletion, amortization and accretion expense                                     4,853              (770)
   Income Taxes                                                                     (1,675)              277
Stock based compensation (f)                                                         2,612               771
                                                                          -----------------  ----------------
Net loss before cumulative effect of change in accounting policy                    (5,819)          (26,106)
Cumulative effect of change in accounting policy, net of tax (d)                         0               147
                                                                          -----------------  ----------------
Net loss in accordance with U.S. GAAP                                            $  (5,819)        $ (25,959)
                                                                          -----------------  ----------------
Net loss per share in accordance with U.S. GAAP
Basic                                                                            $   (0.05)        $   (0.31)
                                                                          -----------------  ----------------
Diluted                                                                          $   (0.05)        $   (0.31)
                                                                          -----------------  ----------------
</Table>

Years ended December 31, 2004 and 2003
(Tabular amounts in thousands of Canadian dollars except per share amounts)

The application of U.S. GAAP results in the following differences to the
following balance sheet items:

<Table>
<Caption>
                                                     2004                            2003*
                                       --------------------------------  ------------------------------
                                             Canadian    United States        Canadian    United States
                                       --------------- ----------------  -------------- ---------------
<S>                                    <C>             <C>               <C>            <C>
Petroleum and natural gas properties        $ 128,716        $  91,732      $  107,474         $ 75,038
Future income tax liability                     8,778                -           9,220                -
Share capital (e)                             114,626          155,485         102,404          143,476
Contributed Surplus (f)                         3,386                -           1,404                -
Deficit                                        (4,462)         (70,141)         (1,438)         (64,322)
</Table>

* The adoption of the Canadian GAAP policy for asset retirement obligations
during the year ended December 31, 2004 has been applied retroactively with
restatement of prior periods. This has
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eliminated certain U.S. GAAP differences previously reported for the 2003
comparative figures.

(a)  Flow Through Shares

The Company finances a portion of its activities with flow through share
issues whereby the tax deductions are renounced to the share subscribers. The
tax cost of the deductions renounced to shareholders is reflected as an
increase in the future income tax liability and a reduction from the stated
value of the shares. Under U.S. GAAP, share capital for flow through shares
issued after 1998 is stated at the quoted value of the shares at the date of
issuance; the tax cost resulting from deduction renouncements, less any
proceeds received in excess of the quoted value of the shares, must be
included in the determination of the tax expense.

(b)  Property Acquisitions

In prior years, the Corporation recorded property acquisitions from related
parties in exchange for common shares at the exchange amount, pursuant to
Canadian GAAP. Under U.S. GAAP, these related party acquisitions are recorded
at the seller's carrying amount. The resulting differences in the recorded
carrying amounts of the properties results in differences in depletion and
amortization expense in subsequent years.

(c)  Ceiling Test

At December 31, 2004, the Corporation applied a ceiling test to its petroleum
and natural gas properties. Under Canadian GAAP, the application of this test
required no adjustment to the carrying value of the Corporation's petroleum
and natural gas properties.

For U.S. GAAP purposes, the ceiling test used December 31, 2004 prices of:

        Gas (per thousand cubic feet)                        $ 6.35 CDN
        Oil and natural gas liquids (per barrel)             $50.25 CDN

The application of the test resulted in a $10.0 million pre-tax reduction ($8.6
million after tax) in the carrying value of the Corporation's petroleum and
natural gas properties under U.S. GAAP.

At December 31, 2003, the Corporation applied a ceiling test to its petroleum
and natural gas properties using December 31, 2003 prices of:

        Gas (per thousand cubic feet)                        $ 6.10 CDN
        Oil and natural gas liquids (per barrel)             $34.92 CDN

The application of the test resulted in a $34.1 million pre-tax reduction
($22.0 million after tax) in the carrying value of the Corporation's
petroleum and natural gas properties under U.S. GAAP. Under Canadian GAAP,
the application of this test required no adjustment to the carrying value of
the Corporation's petroleum and natural gas properties.

The resulting differences in the recorded carrying amounts of the properties
results in differences in depletion, amortization and accretion expenses in
subsequent years.

(d)  Asset Retirement Obligation

The Corporation adopted with retroactive application the U.S. GAAP policy for
asset retirement obligations as of January 1, 2003. The change to the January
1, 2003 reported values were to increase: petroleum and natural gas
properties by $888,000, asset retirement obligation by $632,000, future
income tax liability by $109,000 and net loss by $147,000. This application
did not have a significant impact on the Corporation's earnings and did not
impact the Corporation's net
<Page>

loss per share. This policy was adopted under Canadian GAAP effective January
1, 2004 and as such, is no longer a reconciling item between Canadian GAAP
and U.S. GAAP.

(e)  Stated Capital Reduction

On June 27, 2003, at the Corporation's Annual Meeting of Shareholders, a
special resolution was approved authorizing a reduction in the stated capital
account for the common shares of the Corporation of $17,057,000, being the
Corporation's deficit as at December 31, 2002. This reduction is not allowed
under U.S. GAAP.

(f)  Stock Based Compensation

Under U.S. GAAP, FAS 123 establishes financial accounting and reporting
standards for stock-based employee compensation plans as well as transactions
in which an entity issues its equity instruments to acquire goods or services
from non-employees. As permitted by FAS 123, the Company elected to follow
the intrinsic value method of accounting for stock-based compensation
arrangements, as provided for in Accounting Principles Board ("APB") Opinion
25. Since all options were granted with exercise prices equal to the market
price when the options were granted, no compensation expense has been charged
to income at the time of the option grants.

Effective January 1, 2004, the Corporation retroactively adopted the Canadian
GAAP policy for "Stock Based Compensation". This standard requires the
Corporation to measure all stock based payments using the fair value method
of accounting, and recognize the compensation expense over the vesting period
of the related options with a corresponding increase in contributed surplus.
This change has resulted in a U.S. GAAP difference and has reduced both the
reported net loss and contributed surplus by $2,612,000 (2003 - 771,000) for
the year ended December 31, 2004.

ADDITIONAL U.S. GAAP DISCLOSURES

FAS 133

At times the Company will use derivative financial instruments to manage
commodity price exposure. Effective January 1, 2001 the Company adopted the
provisions of FAS 133 which requires that all derivatives be recognized as
assets and liabilities on the balance sheet and measured at fair value. Gains
or losses, including unrealized amounts, on derivatives that have not been
designated as hedges, or were not effective as hedges, are included in income
as they arise.

For derivatives designated as fair value hedges, changes in the fair value
are recognized in income together with changes in the fair value of the
hedged item. For derivatives designated as cash flow hedges, changes in the
fair value of the derivatives are recognized in other comprehensive income
until the hedged items are recognized in income. Any change in the fair value
of the derivatives that is not effective in hedging the changes in future
cash flows is included in income as they arise.

At December 31, 2004 and 2003 the Corporation did not have any derivative
financial instruments that were not designated as fair value hedges.

FAS 123(R)

In December 2004, the Financial Accounting Standards Board ("FASB") issued
FAS 123(R), "Share-based Payment", which replaces FAS 123 and supersedes APB
Opinion 25. FAS 123(R) requires compensation cost related to share-based
payments be recognized in the financial statements and that the cost must be
measured based on the fair value of the equity or liability instruments
issued. Under FAS 123(R) all share-based payment plans must be valued using
option-pricing models. FAS 123(R) is effective for the third quarter of 2005.
The Company has not yet determined what, if any impact this change will have
on the reconciliation with U.S. GAAP.
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FIN 46 - Accounting for Variable Interest Entities

In January 2003, the FASB issued Financial Interpretation 46 "Accounting for
Variable Interest Entities" ("FIN 46") that requires the consolidation of
Variable Interest Equities ("VIEs"). VIEs are entities that have insufficient
equity or their equity investors lack one or more of the specified elements
that a controlling entity would have. The VIEs are controlled through
financial interests that indicate control (referred to as "variable
interests"). Variable interests are the rights or obligations that expose the
holder of the variable interest to expected losses or expected residual gains
of the entity. The holder of the majority of an entity's variable interests
is considered the primary beneficiary of the VIE and is required to
consolidate the VIE. In December 2003 the FASB issued FIN 46R which
superseded FIN 46 and restricts the scope of the definition of entities that
would be considered VIEs that require consolidation. The Company does not
believe FIN 46R results in the consolidation of any additional entities.

SAB 106

In September 2004, the Securities and Exchange Commission issued Staff
Accounting Bulletin 106 ("SAB 106") regarding the application of FAS 143 by
oil and gas producing entities that follow the full cost accounting method.
SAB 106 states that after the adoption of FAS 143 the future cash flows
associated with the settlement of asset retirement obligations that have been
accrued on the balance sheet should be excluded from the computation of the
present value of estimated future net revenues for purposes of the full cost
ceiling test calculation. The Company excludes the future cash outflows
associated with settling asset retirement obligations from the present value
of estimated future net cash flows and does not reduce the capitalized oil
and gas costs by the asset retirement obligation accrued on the balance
sheet. Costs subject to depletion and depreciation include estimated costs
required to develop proved undeveloped reserves and the associated addition
to the asset retirement obligations. The adoption of SAB 106 in the fourth
quarter of 2004 did not have a material effect on the results of the ceiling
test or depletion, depreciation and amortization calculations.

FAS 153

In December 2004, the FASB issued FAS 153 which deals with the accounting for
the exchanges of nonmonetary assets. FAS 153 is an amendment of APB Opinion
29. APB Opinion 29 requires that exchanges of nonmonetary assets should be
measured based on the fair value of the assets exchanged. FAS 153 amends APB
Opinion 29 to eliminate the exception from using fair market value for
nonmonetary exchanges of similar productive assets and introduces a broader
exception for exchanges of nonmonetary assets that do not have commercial
substance. FAS 153 is effective for nonmonetary asset exchanges occurring in
fiscal periods beginning after June 15, 2005.The Company does not believe
that the application of FAS 153 will have an impact on the financial
statements.

PRESENTATION

There are different presentations between Canadian and U.S. GAAP which are as
follows:

1)  No subtotal is permitted under U.S. GAAP within cashflow from operations on
    the statement of cashflows.

2)  Under U.S. GAAP, there is no difference between net income and other
    comprehensive income.