<?xml version="1.0" encoding="utf-8"?>
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation=" http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <labelLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link">
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_FiscalYearCompensation" xlink:label="ec_FiscalYearCompensation" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_FiscalYearCompensation" xlink:to="ec_FiscalYearCompensation_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_FiscalYearCompensation_lbl" xml:lang="en">The Summary Compensation table must include the last three completed fiscal years, starting in 2006.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_FiscalYearCompensation_lbl" xml:lang="en">Executive - Fiscal Year Compensation</label>
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_AllOtherCompensation" xlink:label="ec_AllOtherCompensation" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_AllOtherCompensation" xlink:to="ec_AllOtherCompensation_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_AllOtherCompensation_lbl" xml:lang="en">Includes, but not limited to perquisites and other personal benefits, "gross-ups" or other reimbursements for the payment of taxes, discounts on securities purchased (the compensation cost, if any, computed as per FAS 123R), termination payments, company contributions to defined contribution plans, and life insurance premiums paid by the company.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_AllOtherCompensation_lbl" xml:lang="en">Fiscal Year Compensation - All Other Compensation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ec_AllOtherCompensation_lbl" xml:lang="en">All Other Compensation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="ec_AllOtherCompensation_lbl" xml:lang="en">The value of all perks and personal benefits totaling at least $10,000 must be included here.</label>        
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_Bonus" xlink:label="ec_Bonus" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_Bonus" xlink:to="ec_Bonus_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_Bonus_lbl" xml:lang="en">The amount of bonus (cash and non-cash) earned by the executive during the fiscal year.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_Bonus_lbl" xml:lang="en">Fiscal Year Compensation - Bonus</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ec_Bonus_lbl" xml:lang="en">Bonus</label>    
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="ec_Bonus_lbl" xml:lang="en">Cash payments approved by the board that are not tied to performance targets agreed upon in advance.</label>        
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_ChangeInPensionValueNonqualifiedDeferredCompensationEarnings" xlink:label="ec_ChangeInPensionValueNonqualifiedDeferredCompensationEarnings" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_ChangeInPensionValueNonqualifiedDeferredCompensationEarnings" xlink:to="ec_ChangeInPensionValueNonqualifiedDeferredCompensationEarnings_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_ChangeInPensionValueNonqualifiedDeferredCompensationEarnings_lbl" xml:lang="en">The change in the actuarial present value of defined benefit pension plans and preferential earnings on deferred compensation.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_ChangeInPensionValueNonqualifiedDeferredCompensationEarnings_lbl" xml:lang="en">Fiscal Year Compensation - Change in Pension Value and Nonqualified Deferred Compensation Earnings</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ec_ChangeInPensionValueNonqualifiedDeferredCompensationEarnings_lbl" xml:lang="en">Change in Pension Value and Nonqualified Deferred Compensation Earnings</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="ec_ChangeInPensionValueNonqualifiedDeferredCompensationEarnings_lbl" xml:lang="en">Increases in the value of pension benefits plus above-market returns on tax advantaged accounts not available to most employees.</label>        
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_GrantDateFairValue" xlink:label="ec_GrantDateFairValue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_GrantDateFairValue" xlink:to="ec_GrantDateFairValue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_GrantDateFairValue_lbl" xml:lang="en">Includes the Grant Date Fair Value (GDFV) of each equity award (on the table "Grants of Plan-Based Awards"), computed per FAS 123R.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_GrantDateFairValue_lbl" xml:lang="en">Grants of Plan-Based Awards - Grant Date Fair Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ec_GrantDateFairValue_lbl" xml:lang="en">Grant Date Fair Value of Stock and Option Awards</label>     
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_GrantsPlanBasedAwards" xlink:label="ec_GrantsPlanBasedAwards" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_GrantsPlanBasedAwards" xlink:to="ec_GrantsPlanBasedAwards_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_GrantsPlanBasedAwards_lbl" xml:lang="en">The Grants of Plan-Based Awards Table, computed per FAS 123R.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_GrantsPlanBasedAwards_lbl" xml:lang="en">Fiscal Year Compensation - Grants of Plan-Based Awards</label>
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_NonEquityIncentivePlanCompensation" xlink:label="ec_NonEquityIncentivePlanCompensation" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_NonEquityIncentivePlanCompensation" xlink:to="ec_NonEquityIncentivePlanCompensation_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_NonEquityIncentivePlanCompensation_lbl" xml:lang="en">Earnings for services performed pursuant to awards under non-equity incentive plans (an incentive plan under which the awards granted do not fall within the scope of FAS123R) and all earnings on any outstanding awards.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_NonEquityIncentivePlanCompensation_lbl" xml:lang="en">Fiscal Year Compensation - Non-Equity Incentive Plan Compensation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ec_NonEquityIncentivePlanCompensation_lbl" xml:lang="en">Non-Equity Incentive Plan Compensation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="ec_NonEquityIncentivePlanCompensation_lbl" xml:lang="en">Typically, cash awards for hitting performance targets agreed upon in advance.</label>        
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_OptionAwards" xlink:label="ec_OptionAwards" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_OptionAwards" xlink:to="ec_OptionAwards_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_OptionAwards_lbl" xml:lang="en">For awards of options, the amount recognized for financial statement reporting purposes per FAS 123R.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_OptionAwards_lbl" xml:lang="en">Fiscal Year Compensation - Option Awards</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ec_OptionAwards_lbl" xml:lang="en">Option Awards</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="ec_OptionAwards_lbl" xml:lang="en">Annual cost to the company of option awards.</label>        
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_Salary" xlink:label="ec_Salary" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_Salary" xlink:to="ec_Salary_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_Salary_lbl" xml:lang="en">The amount of base salary (cash and non-cash) earned by the executive during the fiscal year.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_Salary_lbl" xml:lang="en">Fiscal Year Compensation - Salary</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ec_Salary_lbl" xml:lang="en">Salary</label>
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_StockAwards" xlink:label="ec_StockAwards" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_StockAwards" xlink:to="ec_StockAwards_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_StockAwards_lbl" xml:lang="en">For awards of stock, the amount recognized for financial statement reporting purposes per FAS 123R.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_StockAwards_lbl" xml:lang="en">Fiscal Year Compensation - Stock Awards</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ec_StockAwards_lbl" xml:lang="en">Stock Awards</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="ec_StockAwards_lbl" xml:lang="en">Annual cost to the company of stock awards.</label>        
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_Total" xlink:label="ec_Total" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_Total" xlink:to="ec_Total_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_Total_lbl" xml:lang="en">The sum of amounts in the "salary" through the "all other compensation" columns of the Summary Compensation Table for the fiscal year.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_Total_lbl" xml:lang="en">Fiscal Year Compensation - Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ec_Total_lbl" xml:lang="en">Total</label>    
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_Year" xlink:label="ec_Year" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_Year" xlink:to="ec_Year_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_Year_lbl" xml:lang="en">The last three completed fiscal years, starting in 2006.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_Year_lbl" xml:lang="en">Fiscal Year Compensation - Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ec_Year_lbl" xml:lang="en">Year</label>    
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_Name" xlink:label="ec_Name" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_Name" xlink:to="ec_Name_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_Name_lbl" xml:lang="en">The name of the executive.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_Name_lbl" xml:lang="en">Executive - Name</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ec_Name_lbl" xml:lang="en">Name</label>    
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_PrincipalPosition" xlink:label="ec_PrincipalPosition" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_PrincipalPosition" xlink:to="ec_PrincipalPosition_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_PrincipalPosition_lbl" xml:lang="en">The principal position of the executive.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_PrincipalPosition_lbl" xml:lang="en">Executive - Principal Position</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ec_PrincipalPosition_lbl" xml:lang="en">Principal Position</label>    
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_SECPrincipalPositions" xlink:label="ec_SECPrincipalPositions" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_SECPrincipalPositions" xlink:to="ec_SECPrincipalPositions_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_SECPrincipalPositions_lbl" xml:lang="en">The principal executive officer, the principal financial officer, or one of three most highly compensated executive officers.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_SECPrincipalPositions_lbl" xml:lang="en">Executive - SEC Principal Positions</label>
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_SECPrincipalPosition" xlink:label="ec_SECPrincipalPosition" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_SECPrincipalPosition" xlink:to="ec_SECPrincipalPosition_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_SECPrincipalPosition_lbl" xml:lang="en">The principal executive officer, the principal financial officer, or one of three most highly compensated executive officers.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_SECPrincipalPosition_lbl" xml:lang="en">SEC Principal Positions - Principal Position</label>
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_Executive" xlink:label="ec_Executive" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_Executive" xlink:to="ec_Executive_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_Executive_lbl" xml:lang="en">The Summary Compensation Table includes compensation information for specified individuals: principal executive officer (PEO), principal financial officer (PFO), and the three most highly compensated exectives other than the PEO and the PFO.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_Executive_lbl" xml:lang="en">Executive</label>
    <loc xlink:type="locator" xlink:href="ec-2007-04-30.xsd#ec_SummaryCompensation" xlink:label="ec_SummaryCompensation" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ec_SummaryCompensation" xlink:to="ec_SummaryCompensation_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ec_SummaryCompensation_lbl" xml:lang="en">The principal disclosure vehicle regarding executive compensation that includes compensation paid currently or deferred (including options, restricted stock and similar grants) and compensation consisting of current earnings or awards that are part of a plan.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ec_SummaryCompensation_lbl" xml:lang="en">Summary Compensation</label>
  </labelLink>
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