Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the use of our reports dated February 26, 2015, with respect to the consolidated balance sheets of Approach Resources Inc. and its subsidiaries as of December 31, 2014 and 2013, and the related consolidated statements of operations, changes in stockholders’ equity and cash flows for each of the years in the three-year period ended December 31, 2014, and the effectiveness of internal control over financial reporting as of December 31, 2014, incorporated by reference herein.

/s/ HEIN & ASSOCIATES LLP

Dallas, Texas

November 13, 2015