Document and Entity Information	9 Months Ended
	Jun. 30, 2011	Jul. 31, 2011
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q3
Trading Symbol	DWOG
Entity Registrant Name	DEEP WELL OIL & GAS INC
Entity Central Index Key	0000869495
Current Fiscal Year End Date	--09-30
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		136,739,971