Our Core Values


In 1978, recent Geology graduates and friends Scott Rohloff and Jeff Armstrong formed Petro Graph in Giddings Texas. It operated under that name until 1996 when it was changed to Texas Geologic Services. With over 35-years of experience and over 6000 wells logged, we continue to provide the best customer Service, highly skilled well site geologists, and continue to utilize the latest technology available.


Company founders, Jeff Armstrong and Scott Rohloff (BS Geology), remain active in the business in a geologic advisory capacity. Our staff consists of over 30 trained and experienced technicians. Many of who have a B.S. degree in Geology. Our Well Site Geologists have extensive experience throughout Texas, Oklahoma, and Louisiana. As a company, we have always focused on the geologic interpretation whether it’s calling formation tops or evaluating sample porosity in fractured carbonates. We always strive to have the best in the business.


We pride ourselves on being large enough to handle any size drilling program but small enough to cater to any individual company’s needs. When you call our office, you deal directly with the principals of TGS. Our goal as a management team is to provide the highest level of customer service possible. Brenton Kinas, Our General Manager with over 10 years industry experience is available 24 hours a day and can respond to any issues that might arise.