Document and Entity Information	6 Months Ended
	Mar. 31, 2013
Document and Entity Information [Abstract]
Entity Registrant Name	DEEP WELL OIL & GAS INC
Entity Central Index Key	0000869495
Amendment Flag	false
Current Fiscal Year End Date	--09-30
Document Type	10-Q
Document Period End Date	Mar. 31, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Entity Filer Category	Smaller Reporting Company
Entity Common Stock Shares Outstanding	179,597,113