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    <link:label id="lab_us-gaap_LetterOfCreditMember_DE34E85D9089EFADFF168DCFB4541C8F_terseLabel_en-US" xlink:label="lab_us-gaap_LetterOfCreditMember_DE34E85D9089EFADFF168DCFB4541C8F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Letter of Credit</link:label>
    <link:label id="lab_us-gaap_LetterOfCreditMember_DE34E85D9089EFADFF168DCFB4541C8F_label_en-US" xlink:label="lab_us-gaap_LetterOfCreditMember_DE34E85D9089EFADFF168DCFB4541C8F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Letter of Credit [Member]</link:label>
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    <link:label id="lab_cdev_LineOfCreditFacilityMaximumBorrowingCapacityAutomaticDecreaseInBorrowingCapacity_968C717DBE24BD0C0E598DCFB455BBAD_terseLabel_en-US" xlink:label="lab_cdev_LineOfCreditFacilityMaximumBorrowingCapacityAutomaticDecreaseInBorrowingCapacity_968C717DBE24BD0C0E598DCFB455BBAD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Automatic decrease in borrowing base</link:label>
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    <link:label id="lab_us-gaap_StatementOfCashFlowsAbstract_D59F3EB85598779C2CA474E37E0B1446_label_en-US" xlink:label="lab_us-gaap_StatementOfCashFlowsAbstract_D59F3EB85598779C2CA474E37E0B1446" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Cash Flows [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract_D59F3EB85598779C2CA474E37E0B1446" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_D59F3EB85598779C2CA474E37E0B1446" xlink:to="lab_us-gaap_StatementOfCashFlowsAbstract_D59F3EB85598779C2CA474E37E0B1446" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_CA498A96A10C48C4A9F974E37E0B87F3_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_CA498A96A10C48C4A9F974E37E0B87F3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash flows from operating activities:</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_CA498A96A10C48C4A9F974E37E0B87F3_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_CA498A96A10C48C4A9F974E37E0B87F3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_CA498A96A10C48C4A9F974E37E0B87F3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_CA498A96A10C48C4A9F974E37E0B87F3" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_CA498A96A10C48C4A9F974E37E0B87F3" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_4DAB4662C451BDC40BF074E37E0B87BF_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_4DAB4662C451BDC40BF074E37E0B87BF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustments to reconcile net income (loss) to net cash provided by operating activities:</link:label>
    <link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_4DAB4662C451BDC40BF074E37E0B87BF_label_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_4DAB4662C451BDC40BF074E37E0B87BF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_4DAB4662C451BDC40BF074E37E0B87BF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_4DAB4662C451BDC40BF074E37E0B87BF" xlink:to="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_4DAB4662C451BDC40BF074E37E0B87BF" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensation_F10F0DBC02FFEF9E0FB974E37E0B62A7_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_F10F0DBC02FFEF9E0FB974E37E0B62A7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock-based compensation expense</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensation_F10F0DBC02FFEF9E0FB974E37E0B62A7_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_F10F0DBC02FFEF9E0FB974E37E0B62A7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_F10F0DBC02FFEF9E0FB974E37E0B62A7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensation_F10F0DBC02FFEF9E0FB974E37E0B62A7" xlink:to="lab_us-gaap_ShareBasedCompensation_F10F0DBC02FFEF9E0FB974E37E0B62A7" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredIncomeTaxesAndTaxCredits_9371FEB90E97971BAC8274E37E0DBFFA_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxesAndTaxCredits_9371FEB90E97971BAC8274E37E0DBFFA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred tax expense (benefit)</link:label>
    <link:label id="lab_us-gaap_DeferredIncomeTaxesAndTaxCredits_9371FEB90E97971BAC8274E37E0DBFFA_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxesAndTaxCredits_9371FEB90E97971BAC8274E37E0DBFFA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Income Taxes and Tax Credits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_9371FEB90E97971BAC8274E37E0DBFFA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_9371FEB90E97971BAC8274E37E0DBFFA" xlink:to="lab_us-gaap_DeferredIncomeTaxesAndTaxCredits_9371FEB90E97971BAC8274E37E0DBFFA" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainLossOnSaleOfProperty_2801F950F3BCCDACC02B74E37E0D1948_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfProperty_2801F950F3BCCDACC02B74E37E0D1948" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">(Gain) loss on sale of oil and natural gas properties</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnSaleOfProperty" xlink:label="loc_us-gaap_GainLossOnSaleOfProperty_2801F950F3BCCDACC02B74E37E0D1948" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSaleOfProperty_2801F950F3BCCDACC02B74E37E0D1948" xlink:to="lab_us-gaap_GainLossOnSaleOfProperty_2801F950F3BCCDACC02B74E37E0D1948" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnrealizedGainLossOnDerivatives_1F8AE6BCAEE92C62ECEF74E37E0D7520_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossOnDerivatives_1F8AE6BCAEE92C62ECEF74E37E0D7520" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Non-cash portion of derivative (gain) loss</link:label>
    <link:label id="lab_us-gaap_UnrealizedGainLossOnDerivatives_1F8AE6BCAEE92C62ECEF74E37E0D7520_label_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossOnDerivatives_1F8AE6BCAEE92C62ECEF74E37E0D7520" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrealized Gain (Loss) on Derivatives</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="loc_us-gaap_UnrealizedGainLossOnDerivatives_1F8AE6BCAEE92C62ECEF74E37E0D7520" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrealizedGainLossOnDerivatives_1F8AE6BCAEE92C62ECEF74E37E0D7520" xlink:to="lab_us-gaap_UnrealizedGainLossOnDerivatives_1F8AE6BCAEE92C62ECEF74E37E0D7520" xlink:type="arc" />
    <link:label id="lab_us-gaap_AmortizationOfFinancingCosts_68D8FEC6EB00A565CE7374E37E0D8B6B_terseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfFinancingCosts_68D8FEC6EB00A565CE7374E37E0D8B6B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortization of debt issuance costs</link:label>
    <link:label id="lab_us-gaap_AmortizationOfFinancingCosts_68D8FEC6EB00A565CE7374E37E0D8B6B_label_en-US" xlink:label="lab_us-gaap_AmortizationOfFinancingCosts_68D8FEC6EB00A565CE7374E37E0D8B6B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization of Debt Issuance Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_68D8FEC6EB00A565CE7374E37E0D8B6B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AmortizationOfFinancingCosts_68D8FEC6EB00A565CE7374E37E0D8B6B" xlink:to="lab_us-gaap_AmortizationOfFinancingCosts_68D8FEC6EB00A565CE7374E37E0D8B6B" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_F2739662C86EA6868CF774E37E0DE32D_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_F2739662C86EA6868CF774E37E0DE32D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Changes in operating assets and liabilities:</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_F2739662C86EA6868CF774E37E0DE32D_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_F2739662C86EA6868CF774E37E0DE32D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Operating Capital [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_F2739662C86EA6868CF774E37E0DE32D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_F2739662C86EA6868CF774E37E0DE32D" xlink:to="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_F2739662C86EA6868CF774E37E0DE32D" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_69725EAD7D1A75D72F1D74E37E0DF83E_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_69725EAD7D1A75D72F1D74E37E0DF83E" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">(Increase) decrease in accounts receivable</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_69725EAD7D1A75D72F1D74E37E0DF83E_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_69725EAD7D1A75D72F1D74E37E0DF83E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Accounts Receivable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_69725EAD7D1A75D72F1D74E37E0DF83E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_69725EAD7D1A75D72F1D74E37E0DF83E" xlink:to="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_69725EAD7D1A75D72F1D74E37E0DF83E" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_DBB821F2BC6F65451FBB74E37E0DB235_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_DBB821F2BC6F65451FBB74E37E0DB235" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Increase in prepaid and other assets</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_DBB821F2BC6F65451FBB74E37E0DB235_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_DBB821F2BC6F65451FBB74E37E0DB235" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Prepaid Expense and Other Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_DBB821F2BC6F65451FBB74E37E0DB235" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_DBB821F2BC6F65451FBB74E37E0DB235" xlink:to="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_DBB821F2BC6F65451FBB74E37E0DB235" xlink:type="arc" />
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_350E19F560E082C3417B74E37E0D4F3F" xlink:to="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_350E19F560E082C3417B74E37E0D4F3F" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_501C78384A43EC5A733F74E37E0D6F85_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_501C78384A43EC5A733F74E37E0D6F85" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by operating activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_501C78384A43EC5A733F74E37E0D6F85_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_501C78384A43EC5A733F74E37E0D6F85" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F5E154B66BC83E51D8F174E37E0D1B79_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F5E154B66BC83E51D8F174E37E0D1B79" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash flows from investing activities:</link:label>
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    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_942F8783539B4F48444574E37E10D1A8_label_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_942F8783539B4F48444574E37E10D1A8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplemental Cash Flow Information [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_942F8783539B4F48444574E37E10D1A8" xlink:type="locator" />
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    <link:label id="lab_us-gaap_InterestPaid_5FC5C5DFFBB9258AC87074E37E1073CA_terseLabel_en-US" xlink:label="lab_us-gaap_InterestPaid_5FC5C5DFFBB9258AC87074E37E1073CA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash paid for interest</link:label>
    <link:label id="lab_us-gaap_InterestPaid_5FC5C5DFFBB9258AC87074E37E1073CA_label_en-US" xlink:label="lab_us-gaap_InterestPaid_5FC5C5DFFBB9258AC87074E37E1073CA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestPaid" xlink:label="loc_us-gaap_InterestPaid_5FC5C5DFFBB9258AC87074E37E1073CA" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NoncashInvestingAndFinancingItemsAbstract_73EB442A26B374D494AC74E37E102A36_terseLabel_en-US" xlink:label="lab_us-gaap_NoncashInvestingAndFinancingItemsAbstract_73EB442A26B374D494AC74E37E102A36" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Supplemental non-cash activity</link:label>
    <link:label id="lab_us-gaap_NoncashInvestingAndFinancingItemsAbstract_73EB442A26B374D494AC74E37E102A36_label_en-US" xlink:label="lab_us-gaap_NoncashInvestingAndFinancingItemsAbstract_73EB442A26B374D494AC74E37E102A36" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncash Investing and Financing Items [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NoncashInvestingAndFinancingItemsAbstract" xlink:label="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_73EB442A26B374D494AC74E37E102A36" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CapitalExpendituresIncurredButNotYetPaid_E60C93EA237E074A479974E37E107C7D_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalExpendituresIncurredButNotYetPaid_E60C93EA237E074A479974E37E107C7D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued capital expenditures included in accounts payable and accrued expenses</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalExpendituresIncurredButNotYetPaid" xlink:label="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_E60C93EA237E074A479974E37E107C7D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_E60C93EA237E074A479974E37E107C7D" xlink:to="lab_us-gaap_CapitalExpendituresIncurredButNotYetPaid_E60C93EA237E074A479974E37E107C7D" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetRetirementObligationPeriodIncreaseDecrease_EAAC35A28F37A02F454974E37E10C85F_terseLabel_en-US" xlink:label="lab_us-gaap_AssetRetirementObligationPeriodIncreaseDecrease_EAAC35A28F37A02F454974E37E10C85F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Asset retirement obligations incurred, including changes in estimate</link:label>
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    <link:label id="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_5C011422E81BAC537048793AE1A6398A_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_5C011422E81BAC537048793AE1A6398A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net income attributable to common shareholders</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_5C011422E81BAC537048793AE1A6398A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_5C011422E81BAC537048793AE1A6398A" xlink:to="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_5C011422E81BAC537048793AE1A6398A" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConvertiblePreferredStockConvertedToOtherSecurities_FFE94B77A8FA5FFC7B9D793AE1A6788C_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_ConvertiblePreferredStockConvertedToOtherSecurities_FFE94B77A8FA5FFC7B9D793AE1A6788C" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Add: Income from conversion of Class C Common Stock</link:label>
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    <link:label id="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_96BEAD4AD076A0033003793AE1A63821_totalLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_96BEAD4AD076A0033003793AE1A63821" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Adjusted net income attributable to common shareholders</link:label>
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    <link:label id="lab_us-gaap_EarningsPerShareBasic_CFC512537919AD579F41793AE1A6F97D_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic_CFC512537919AD579F41793AE1A6F97D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Basic net income per share (USD per share)</link:label>
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