-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 X1NDlwrqKwWWMp8QYOS4OQ==

<SEC-DOCUMENT>0001349436-09-000201.txt : 20091231
<SEC-HEADER>0001349436-09-000201.hdr.sgml : 20091231
<ACCEPTANCE-DATETIME>20091230183318
ACCESSION NUMBER:		0001349436-09-000201
CONFORMED SUBMISSION TYPE:	D
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
FILED AS OF DATE:		20091231
DATE AS OF CHANGE:		20091230
EFFECTIVENESS DATE:		20091231

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SANDRIDGE ENERGY INC
		CENTRAL INDEX KEY:			0001349436
		STANDARD INDUSTRIAL CLASSIFICATION:	CRUDE PETROLEUM & NATURAL GAS [1311]
		IRS NUMBER:				208084793
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		D
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-84955
		FILM NUMBER:		091267347

	BUSINESS ADDRESS:	
		STREET 1:		123 ROBERT S. KERR AVENUE
		CITY:			OKLAHOMA CITY
		STATE:			OK
		ZIP:			73102-6406
		BUSINESS PHONE:		405-429-5500

	MAIL ADDRESS:	
		STREET 1:		123 ROBERT S. KERR AVENUE
		CITY:			OKLAHOMA CITY
		STATE:			OK
		ZIP:			73102-6406

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	RIATA ENERGY INC
		DATE OF NAME CHANGE:	20060111
</SEC-HEADER>
<DOCUMENT>
<TYPE>D
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0603</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001349436</cik>
        <entityName>SANDRIDGE ENERGY INC</entityName>
        <issuerAddress>
            <street1>123 ROBERT S. KERR AVENUE</street1>
            <city>OKLAHOMA CITY</city>
            <stateOrCountry>OK</stateOrCountry>
            <zipCode>73102-6406</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>405-429-5500</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <edgarPreviousNameList>
            <previousName>RIATA ENERGY INC</previousName>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2006</value>
        </yearOfInc>
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    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Tom</firstName>
                <middleName>L</middleName>
                <lastName>Ward</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>123 Robert S. Kerr Avenue</street1>
                <city>Oklahoma City</city>
                <stateOrCountry>OK</stateOrCountry>
                <zipCode>73102</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Dirk</firstName>
                <middleName>M</middleName>
                <lastName>Van Doren</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>123 Robert S. Kerr Avenue</street1>
                <city>Oklahoma City</city>
                <stateOrCountry>OK</stateOrCountry>
                <zipCode>73102</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Todd</firstName>
                <middleName>N</middleName>
                <lastName>Tipton</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>123 Robert S. Kerr Avenue</street1>
                <city>Oklahoma City</city>
                <stateOrCountry>OK</stateOrCountry>
                <zipCode>73102</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Wayne</firstName>
                <middleName>C</middleName>
                <lastName>Chang</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>123 Robert S. Kerr Avenue</street1>
                <city>Oklahoma City</city>
                <stateOrCountry>OK</stateOrCountry>
                <zipCode>73102</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Randall</firstName>
                <middleName>D</middleName>
                <lastName>Cooley</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>123 Robert S. Kerr Avenue</street1>
                <city>Oklahoma City</city>
                <stateOrCountry>OK</stateOrCountry>
                <zipCode>73102</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Richard</firstName>
                <middleName>J</middleName>
                <lastName>Gognat</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>123 Robert S. Kerr Avenue</street1>
                <city>Oklahoma City</city>
                <stateOrCountry>OK</stateOrCountry>
                <zipCode>73102</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Kevin</firstName>
                <middleName>R</middleName>
                <lastName>White</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>123 Robert S. Kerr Avenue</street1>
                <city>Oklahoma City</city>
                <stateOrCountry>OK</stateOrCountry>
                <zipCode>73102</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Mary</firstName>
                <middleName>R</middleName>
                <lastName>Whitson</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>123 Robert S. Kerr Avenue</street1>
                <city>Oklahoma City</city>
                <stateOrCountry>OK</stateOrCountry>
                <zipCode>73102</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Lon</firstName>
                <middleName>L</middleName>
                <lastName>Winton</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>123 Robert S. Kerr Avenue</street1>
                <city>Oklahoma City</city>
                <stateOrCountry>OK</stateOrCountry>
                <zipCode>73102</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Everett</firstName>
                <middleName>R</middleName>
                <lastName>Dobson</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>5001 North Gaillardia Corporate Place</street1>
                <street2>Suite A</street2>
                <city>Oklahoma City</city>
                <stateOrCountry>OK</stateOrCountry>
                <zipCode>73142</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>William</firstName>
                <middleName>A</middleName>
                <lastName>Gilliland</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>2806 South Hughes</street1>
                <city>Amarillo</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>79109</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Daniel</firstName>
                <middleName>W</middleName>
                <lastName>Jordon</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>P.O. Box 52501</street1>
                <city>Tulsa</city>
                <stateOrCountry>OK</stateOrCountry>
                <zipCode>74152</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Roy</firstName>
                <middleName>T</middleName>
                <lastName>Oliver</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>Corporate Tower, Suite 900</street1>
                <street2>101 N. Robinson</street2>
                <city>Oklahoma City</city>
                <stateOrCountry>OK</stateOrCountry>
                <zipCode>73102</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>D</firstName>
                <middleName>Dwight</middleName>
                <lastName>Scott</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>11 Greenway Plaza, Suite 3050</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77046</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Jeffrey</firstName>
                <middleName>S</middleName>
                <lastName>Serota</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>2000 Avenue of the Stars - 12th Floor</street1>
                <city>Los Angeles</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90067</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Oil and Gas</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Over $100,000,000</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2009-12-16</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isDebtType>true</isDebtType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>450000000</totalOfferingAmount>
            <totalAmountSold>450000000</totalAmountSold>
            <totalRemaining>0</totalRemaining>
            <clarificationOfResponse>The closing and terms of the issuance and sale of the securities were disclosed by the Company on a Current Report on Form 8-K filed with the Commission on December 22, 2009.</clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>14</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>SANDRIDGE ENERGY INC</issuerName>
                <signatureName>/s/ Dirk M. Van Doren</signatureName>
                <nameOfSigner>Dirk M. Van Doren</nameOfSigner>
                <signatureTitle>Executive Vice President and Chief Financial Officer</signatureTitle>
                <signatureDate>2009-12-30</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----