    <SEC-DOCUMENT>0001486159-21-000092-index.html : 20211220
    <SEC-HEADER>0001486159-21-000092.hdr.sgml : 20211220
    <ACCEPTANCE-DATETIME>20211217182446
    ACCESSION NUMBER:		0001486159-21-000092
    CONFORMED SUBMISSION TYPE:	8-K/A
    PUBLIC DOCUMENT COUNT:		31
    CONFORMED PERIOD OF REPORT:	20211021
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20211220
    DATE AS OF CHANGE:		20211217

    FILER:

    	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

    	FILING VALUES:
    		FORM TYPE:		8-K/A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-34776
    		FILM NUMBER:		211503056

    	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>
    <DOCUMENT>
    <TYPE>8-K/A
    <SEQUENCE>1
    <FILENAME>oas-20211021.htm
    <DESCRIPTION>8-K/A
    <TEXT>
    Document 1 - file: oas-20211021.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>ex991-willistonbasinacquis.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 2 - file: ex991-willistonbasinacquis.htm

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    <DOCUMENT>
    <TYPE>EX-99.2
    <SEQUENCE>3
    <FILENAME>ex992-willistonbasinacquis.htm
    <DESCRIPTION>EX-99.2
    <TEXT>
    Document 3 - file: ex992-willistonbasinacquis.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>4
    <FILENAME>oas-20211021.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 4 - file: oas-20211021.xsd

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    <DOCUMENT>
    <TYPE>EX-101.CAL
    <SEQUENCE>5
    <FILENAME>oas-20211021_cal.xml
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    <TEXT>
    Document 5 - file: oas-20211021_cal.xml

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    <TYPE>EX-101.DEF
    <SEQUENCE>6
    <FILENAME>oas-20211021_def.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT
    <TEXT>
    Document 6 - file: oas-20211021_def.xml

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    <TYPE>EX-101.LAB
    <SEQUENCE>7
    <FILENAME>oas-20211021_lab.xml
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    <TEXT>
    Document 7 - file: oas-20211021_lab.xml

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    <TYPE>EX-101.PRE
    <SEQUENCE>8
    <FILENAME>oas-20211021_pre.xml
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    <TEXT>
    Document 8 - file: oas-20211021_pre.xml

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    <FILENAME>oas-20211021_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
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    Document 9 - RAW XML: oas-20211021_htm.xml

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    <SEQUENCE>10
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    Document 10 - file: R1.htm

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    <SEQUENCE>11
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    Document 11 - file: R2.htm

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    <SEQUENCE>12
    <FILENAME>R3.htm
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    Document 12 - file: R3.htm

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    Document 15 - file: R6.htm

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    <FILENAME>R8.htm
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    Document 17 - file: R8.htm

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    Document 19 - file: R10.htm

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    <SEQUENCE>20
    <FILENAME>R11.htm
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    <TEXT>
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    <TYPE>XML
    <SEQUENCE>21
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    <SEQUENCE>22
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    <SEQUENCE>23
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    <TEXT>
    Document 23 - file: R14.htm

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    <SEQUENCE>24
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    Document 25 - file: R16.htm

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    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>26
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 26 - file: Financial_Report.xlsx

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>27
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 27 - file: Show.js

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    <TYPE>XML
    <SEQUENCE>28
    <FILENAME>report.css
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    <TEXT>
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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>29
    <FILENAME>FilingSummary.xml
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    <TEXT>
    Document 29 - file: FilingSummary.html

    Document 29 - RAW XML: FilingSummary.xml

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    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>32
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 32 - file: MetaLinks.json

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    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>33
    <FILENAME>0001486159-21-000092-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 33 - file: 0001486159-21-000092-xbrl.zip

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