exhibit 10. 18 notice of confidentiality rights : if you are a natural person, you may remove or strike any of the following information from this instrument before it is filed for record in the public records : your social security number or your driver ’ s license number. assignment of overriding royalty ( multiple assignees ) the state of texas § § § know all men by these presents : § county of lynn § § energy & exploration partners, llc whose address is p. o. box 471428, fort worth, texas 76147 - 1376, hereinafter called “ assignor ”, for and inconsideration of the sum of ten dollars ( $ 10. 00 ) and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged by assignor, does by these presents, grant, assign, transfer and convey unto the parties set forth below, hereinafter called the “ assignees ” : ksjr, llc, a texas limited liability company whose address is p. o. box 68, kenny, texas 77452 ; karpman enterprises, lp, a texas limited partnership whose address is 2721 manorwood trail, fort worth, texas 76109 ; cda energy, llc, a texas limited liability company whose address is 1926 stafford rd., grapevine, texas 76015 ; dlp resources, llc, a texas limited liability company whose address is 3121 sweetbriar lane, fort worth, texas 76109 ; alpine ventures international, llc, a texas limited liability company whose address is 4654 trevor trail, grapevine, texas 76051 ; pettit 2012 children ’ s trust whose address is 2821 lenox, fort worth, texas 76107 ; bhp consulting lp, a texas limited partnership whose address is 3821 lenox, fort worth, texas 76107 ; and brian corbett nelson, an individual, whose address is 3090 bellaire ranch dr., apt. 422, fort worth, texas 76109 ; tom d. mcnutt, an individual, whose address is 2000 bremen st., austin, 78703 ; charlotte brandenburg, an individual, whose address is 5324 big bend dr., fort worth, texas 76137 ; carey hewitt, an individual, whose address is 4509 ramsgate ct., arlington 76013. an overriding royalty interest ( the “ overriding royalty ” ), as described in exhibit “ a ”