Exhibit
99.4



CERTIFICATION
PURSUANT TO RULE 13a-14(a) OR 15d-14(a) OF

THE
SECURITIES EXCHANGE ACT OF 1934



I,
Douglas Haughey, certify that:



| | 1. | I
                                                                            have reviewed this annual report on Form 40-F of Provident
                                                                            Energy Ltd.;
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| | 2. | Based
                                                          on my knowledge, this report does not contain any untrue statement of
                                                          a material fact or omit to state a material fact necessary to make the
                                                          statements made, in light of the circumstances under which such statements
                                                          were made, not misleading with respect to the period covered by this
                                                          report;
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| | 3. | Based
                                                          on my knowledge, the financial statements, and other financial information
                                                          included in this report, fairly present in all material respects the
                                                          financial condition, results of operations and cash flows of the issuer
                                                          as of, and for, the periods presented in this report;
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| | 4. | The
                                                          issuer’s other certifying officer and I are responsible for establishing
                                                          and maintaining disclosure controls and procedures (as defined in Exchange
                                                          Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial
                                                          reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f))
                                                          for the issuer and have:
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| | (a) | Designed
                                                                such disclosure controls and procedures, or caused such disclosure
                                                                controls and procedures to be designed under our supervision,
                                                                to ensure that material information relating to the issuer, including
                                                                its consolidated subsidiaries, is made known to us by others within
                                                                those entities, particularly during the period in which this report
                                                                is being prepared;
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| | (b) | Designed
                                                                such internal control over financial reporting, or caused such
                                                                internal control over financial reporting to be designed under
                                                                our supervision, to provide reasonable assurance regarding the
                                                                reliability of financial reporting and the preparation of financial
                                                                statements for external purposes in accordance with generally
                                                                accepted accounting principles;
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| | (c) | Evaluated
                                                                the effectiveness of the issuer’s disclosure controls and
                                                                procedures and presented in this report our conclusions about
                                                                the effectiveness of the disclosure controls and procedures, as
                                                                of the end of the period covered by this report based on such
                                                                evaluation; and
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| | (d) | Disclosed
                                                                in this report any change in the issuer’s internal control
                                                                over financial reporting that occurred during the period covered
                                                                by the annual report that has materially affected, or is reasonably
                                                                likely to materially affect, the issuer’s internal control
                                                                over financial reporting; and
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| | 5. | The
                                                          issuer’s other certifying officer and I have disclosed, based
                                                          on our most recent evaluation of internal control over financial reporting,
                                                          to the issuer’s auditors and the audit committee of the issuer’s
                                                          board of directors (or persons performing the equivalent functions):
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| | (a) | All
                                                                significant deficiencies and material weaknesses in the design
                                                                or operation of internal control over financial reporting which
                                                                are reasonably likely to adversely affect the issuer’s ability
                                                                to record, process, summarize and report financial information;
                                                                and
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| | (b) | Any
                                                                                  fraud, whether or not material, that involves
                                                                                  management or other employees who have a significant
                                                                                  role in the issuer’s internal control
                                                                                  over financial reporting.
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|Date:     March 16, 2012 |                                      
|------------------------ | -------------------------------------
|                         |                                      
|                         | /s/ Douglas
    J. Haughey           
|                         | Douglas J.Haughey,                   
|                         | President and Chief Executive Officer