Exhibit 99.2

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a statement on Schedule 13G (including amendments thereto) with respect to the common stock, par value $0.01 per share, of Carrizo Oil & Gas, Inc., a Texas corporation, and further agree that this Joint Filing Agreement be included as an exhibit to such joint filings. In evidence thereof, each of the undersigned hereby executes this Joint Filing Agreement as of February 28, 2018.

*
Dan H. Wilks
*
Staci Wilks
WILKS BROTHERS, LLC
By:	/s/ Morgan Neff
Name:	Morgan Neff
Title:	Attorney-in-Fact

*By:	/s/ Morgan Neff
	Morgan Neff, as Attorney-in-Fact

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