Exhibit 99

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing with each other on behalf of each of them of such a statement on Schedule 13G with respect to the Common Stock beneficially owned by each of them of Black Ridge Oil & Gas, Inc.  This Joint Filing Agreement shall be included as an Exhibit to such Schedule 13G.

IN WITNESS WHEREOF, the undersigned hereby execute this Joint Filing Agreement as of the 19th day of August, 2013.

CHAMBERS ENERGY MANAGEMENT, LP
By:	Chambers Energy Management GP, LLC, its general partner
By:		/s/ J. Robert Chambers
Name:		J. Robert Chambers
Title:		Sole Member
CHAMBERS ENERGY MANAGEMENT GP, LLC
By:		/s/ J. Robert Chambers
Name:		J. Robert Chambers
Title:		Sole Member
J. ROBERT CHAMBERS
By:		/s/ J. Robert Chambers
CEC FUND II GP, LLC
By:		/s/ J. Robert Chambers
Name:		J. Robert Chambers
Title:		Managing Director
CEC GP, LLC
By:		/s/ J. Robert Chambers
Name:		J. Robert Chambers
Title:		Managing Member