<SEC-DOCUMENT>0000899243-18-016479.txt : 20180613
<SEC-HEADER>0000899243-18-016479.hdr.sgml : 20180613
<ACCEPTANCE-DATETIME>20180613214540
ACCESSION NUMBER:		0000899243-18-016479
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180611
FILED AS OF DATE:		20180613
DATE AS OF CHANGE:		20180613

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ENCAP ENERGY CAPITAL FUND VI L P
		CENTRAL INDEX KEY:			0001366397

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34776
		FILM NUMBER:		18897978

	BUSINESS ADDRESS:	
		STREET 1:		1100 LOUISIANA ST SUITE 3150
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002
		BUSINESS PHONE:		713-659-6100

	MAIL ADDRESS:	
		STREET 1:		1100 LOUISIANA ST SUITE 3150
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			EnCap VI-B Acquisitions, L.P.
		CENTRAL INDEX KEY:			0001494333
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34776
		FILM NUMBER:		18897979

	BUSINESS ADDRESS:	
		STREET 1:		1100 LOUISIANA, SUITE 3150
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002
		BUSINESS PHONE:		713-659-6100

	MAIL ADDRESS:	
		STREET 1:		1100 LOUISIANA, SUITE 3150
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ENCAP ENERGY CAPITAL FUND VII LP
		CENTRAL INDEX KEY:			0001422885
		STATE OF INCORPORATION:			TX

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34776
		FILM NUMBER:		18897980

	BUSINESS ADDRESS:	
		STREET 1:		1100 LOUISIANA STREET
		STREET 2:		SUITE 3150
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002
		BUSINESS PHONE:		713-659-6100

	MAIL ADDRESS:	
		STREET 1:		1100 LOUISIANA STREET
		STREET 2:		SUITE 3150
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			EnCap Energy Capital Fund VIII, L.P.
		CENTRAL INDEX KEY:			0001504103
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34776
		FILM NUMBER:		18897981

	BUSINESS ADDRESS:	
		STREET 1:		1100 LOUISIANA STREET, SUITE 4900
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002
		BUSINESS PHONE:		713.659.6100

	MAIL ADDRESS:	
		STREET 1:		1100 LOUISIANA STREET, SUITE 4900
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			EnCap Energy Capital Fund VIII Co-Investors, L.P.
		CENTRAL INDEX KEY:			0001537403
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34776
		FILM NUMBER:		18897982

	BUSINESS ADDRESS:	
		STREET 1:		1100 LOUISIANA STREET, SUITE 4900
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002
		BUSINESS PHONE:		713.659.6100

	MAIL ADDRESS:	
		STREET 1:		1100 LOUISIANA STREET, SUITE 4900
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			EnCap Partners GP, LLC
		CENTRAL INDEX KEY:			0001726182
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34776
		FILM NUMBER:		18897983

	BUSINESS ADDRESS:	
		STREET 1:		1100 LOUISIANA STREET
		STREET 2:		SUITE 4900
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77022
		BUSINESS PHONE:		7136596100

	MAIL ADDRESS:	
		STREET 1:		1100 LOUISIANA STREET
		STREET 2:		SUITE 4900
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77022

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Oasis Petroleum Inc.
		CENTRAL INDEX KEY:			0001486159
		STANDARD INDUSTRIAL CLASSIFICATION:	CRUDE PETROLEUM & NATURAL GAS [1311]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1001 FANNIN STREET
		STREET 2:		SUITE 1500
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002
		BUSINESS PHONE:		281-404-9500

	MAIL ADDRESS:	
		STREET 1:		1001 FANNIN STREET
		STREET 2:		SUITE 1500
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002
</SEC-HEADER>
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<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
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<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-06-11</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001486159</issuerCik>
        <issuerName>Oasis Petroleum Inc.</issuerName>
        <issuerTradingSymbol>OAS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001366397</rptOwnerCik>
            <rptOwnerName>ENCAP ENERGY CAPITAL FUND VI L P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ENCAP INVESTMENTS L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>1100 LOUISIANA STREET, SUITE 4900</rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77002</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001494333</rptOwnerCik>
            <rptOwnerName>EnCap VI-B Acquisitions, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ENCAP INVESTMENTS L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>1100 LOUISIANA STREET, SUITE 4900</rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77002</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001422885</rptOwnerCik>
            <rptOwnerName>ENCAP ENERGY CAPITAL FUND VII LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ENCAP INVESTMENTS L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>1100 LOUISIANA STREET, SUITE 4900</rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77002</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001504103</rptOwnerCik>
            <rptOwnerName>EnCap Energy Capital Fund VIII, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ENCAP INVESTMENTS L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>1100 LOUISIANA STREET, SUITE 4900</rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77002</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001537403</rptOwnerCik>
            <rptOwnerName>EnCap Energy Capital Fund VIII Co-Investors, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ENCAP INVESTMENTS L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>1100 LOUISIANA STREET, SUITE 4900</rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77002</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001726182</rptOwnerCik>
            <rptOwnerName>EnCap Partners GP, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ENCAP INVESTMENTS L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>1100 LOUISIANA STREET, SUITE 4900</rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77002</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2018-06-11</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>25821413</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>33106166</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                    <footnoteId id="F6"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Pursuant to the company agreement of Forge Energy, LLC (&quot;Forge Energy&quot;), on June 11, 2018, Forge Energy made a distribution of the securities of the issuer to its sole member, Forge Energy Holdings, LLC (&quot;Forge Energy Holdings&quot;).  Pursuant to the company agreement of Forge Energy Holdings, on the same date, Forge Energy Holdings made a pro rata distribution of the securities of the issuer to all of its members, of which EnCap Energy Capital Fund VIII, L.P. (&quot;EnCap Fund VIII&quot;) and EnCap Energy Capital Fund VIII Co-Investors, L.P. (&quot;EnCap Fund VIII Co-Invest&quot;) are members.</footnote>
        <footnote id="F2">As a result of the foregoing distributions by Forge Energy and Forge Energy Holdings, EnCap Fund VIII directly owns 18,774,504 shares of common stock of the issuer and EnCap Fund VIII Co-Invest directly owns 7,046,909 shares of common stock of the issuer.  As described below, EnCap Fund VIII and EnCap Fund VIII Co-Invest are each under common control with EnCap Energy Capital Fund VI, L.P. (&quot;EnCap Fund VI&quot;), EnCap VI-B Acquisitions, L.P. (&quot;EnCap VI-B&quot;) and EnCap Energy Capital Fund VII, L.P. (&quot;EnCap Fund VII&quot; and, together with EnCap Fund VI, EnCap VI-B, EnCap Fund VIII and EnCap Fund VIII Co-Invest, the &quot;EnCap Funds&quot;),</footnote>
        <footnote id="F3">The EnCap Funds are controlled indirectly by EnCap Partners GP, LLC (&quot;EnCap Partners GP&quot;).  EnCap Partners GP is the general partner of EnCap Partners, LP (&quot;EnCap Partners LP&quot;), which is the sole member of EnCap Investments Holdings, LLC (&quot;EnCap Investments Holdings&quot;), which is the sole member of EnCap Investments Holdings Blocker, LLC (&quot;EnCap Investments Holdings Blocker&quot;), which is the sole member of EnCap Investments GP, L.L.C. (&quot;EnCap Investments GP&quot;), which is the general partner of EnCap Investments L.P. (&quot;EnCap Investments LP&quot;), which is the sole member of each of (i) EnCap Equity Fund VI GP, LLC (&quot;EnCap Fund VI GP LLC&quot;), which is the sole general partner of EnCap Equity Fund VI GP, L.P. (&quot;EnCap Fund VI GP&quot;), (ii) EnCap Equity Fund VII GP, LLC (&quot;EnCap Fund VII GP LLC&quot;),</footnote>
        <footnote id="F4">(Continued from footnote 3) which is the sole general partner of EnCap Equity Fund VII GP, L.P. (&quot;EnCap Fund VII GP&quot;) and (iii) EnCap Equity Fund VIII GP, LLC (&quot;EnCap Fund VIII GP LLC&quot;), which is the sole general partner of EnCap Equity Fund VIII GP, L.P. (&quot;Equity Fund VIII GP&quot;).</footnote>
        <footnote id="F5">EnCap Fund VI GP is the sole general partner of EnCap Fund VI and EnCap Fund VI-B, EnCap Fund VII GP is the sole general partner of EnCap Fund VII and EnCap Fund VIII GP is the sole general partner of each of EnCap Fund VIII and EnCap Fund VIII Co-Invest.  Therefore EnCap Partners GP, EnCap Partners LP, EnCap Investments Holdings, EnCap Investments Holdings Blocker, EnCap Investments GP, EnCap Investments LP, EnCap Fund VI GP LLC, EnCap Fund VI GP, EnCap Fund VII GP LLC, EnCap Fund VII GP, EnCap Fund VIII GP LLC and EnCap Fund VIII GP may be deemed to beneficially own the reported securities.</footnote>
        <footnote id="F6">The reporting persons disclaim beneficial ownership of the reported securities except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting persons are the beneficial owners of the reported securities for purposes of Section 16 or for any other purpose.</footnote>
    </footnotes>

    <remarks>Signed by D. Martin Phillips as a Managing Director of EnCap Partners GP, in its capacity as the general partner of EnCap Partners LP, in its capacity as the sole member of EnCap Investments Holdings, in its capacity as the sole member of EnCap Investments Holdings Blocker, in its capacity as the sole member of EnCap Investments GP, in its capacity as the general partner of EnCap Investments LP, in its capacity as the sole member of each of (i) EnCap Fund VI GP LLC, in its capacity as the sole general partner of EnCap Fund VI GP, in its capacity as the general partner of each of EnCap Fund VI and EnCap Fund VI-B, (ii) EnCap Fund VII GP LLC, in its capacity as the general partner of EnCap Fund VII GP, in its capacity as the general partner of EnCap Fund VII and (iii) EnCap Fund VIII GP LLC, in its capacity as the general partner of EnCap Fund VIII GP, in its capacity as the general partner of each of EnCap Fund VIII and EnCap Fund VIII Co-Invest.</remarks>

    <ownerSignature>
        <signatureName>/s/ D. Martin Phillips</signatureName>
        <signatureDate>2018-06-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</SEC-DOCUMENT>
