In business for more than 20 years, R.A. Lenser & Associates Inc. is a full-service petroleum engineering and geological consulting firm. Located in Houston, Texas, the firm specializes in comprehensive oil and gas reserve analysis, geological studies and 3-D seismic interpretation. It provides services that include engineering, geological and litigation, to name a few. The company s engineering services include property appraisals, economic analysis, reserve estimates, log interpretation, evaluation of drilling prospects and enhanced recovery studies.