About Us
About Petrolog
PETROLOG, INC. - WELL LOGGING SERVICES - SINCE 1961
  1. PETROLOG HAS BEEN SERVING THE CALIFORNIA OIL & GAS INDUSTRY 43 YEARS, OUR COMPANY WAS FOUNDED BY TOM AND EVE LYN WILLIAMS IN 1961 AND WAS INCORPORATED IN 1982. WE ARE HERE TO SERVE.
  2. PERSONNEL - CALIFORNIA LOGGING GEOLOGISTS: OUR BUSINESS PHILOSOPHY IS TO DELIVER PERSONALIZED WELL LOGGING SERVICES, BY PROFESSIONAL CALIFORNIA LOGGING GEOLOGISTS, AT A COST EFFECTIVE RATE. OUR TEAM IS THE BEST ASSEMBLED IN CA.
  3. ATTENTION TO DETAIL - OUR PRIORITY IS TO SERVE OUR CLIENTS - WITH A FOCUS ON OIL SHOW EVALUATION; QUALITY GAS ANALYSIS UTILIZING FLAME IONIZATION DETECTION - GAS CHROMATOGRAPHY AND TOTAL GAS MONITORING; EMPLOYING COMPUTERIZED (DIGITAL) FORMATION LOGGING TOOLS; AND A THROUGH UNDERSTANDING OF THE WELL SITE GEOLOGY.
  4. OFFSHORE: (3 LABORATORIES) AND ONSHORE: (4 LABORATORIES), ALL 7 LOGGING LABORATORIES CAN BE UTILIZED ONSHORE.
  5. EXPERIENCE AND PERSONALIZED SERVICE - PETROLOG HAS PROVIDED PROFESSIONAL LOGGING SERVICES ON OVER 1500 WELLS, OUR EXPERIENCE SPANS EVERY CALIFORNIA OIL & GAS BASIN.
  6. EFFICIENCY - EACH LABORATORY IS EQUIPPED AND ORGANIZED IDENTICALLY FOR SYSTEMATIC CONSISTENCY AND MAXIMIZING TIME MANAGEMENT.
  7. RELIABLE GAS ANALYSIS - FLAME IONIZATION DETECTION - COMPUTERIZED GAS CHROMATOGRAPHY AND GAS MONITORING - INTEGRATION AND REINTEGRATION.
  8. PROVEN - LONG WAVE ULTRA VIOLET (BLACK LIGHT) TO HELP FIND OIL,
  9. QUALITY - BINOCULAR MICROSCOPE WITH 10 & 20 POWER TO SEE THE ROCK, OIL AND EVIDENCE OF GAS.
  10. WIRELESS - WELL SITE COMMUNICATIONS - E-MAIL, FACSIMILE, CELLULAR, FOR TIMELY DATA DELIVERY.
  11. DIGITAL - ALL MUD LOG DATA IS DIGITAL - DELIVERED BY E-MAIL OR CD, IN EASY FORMATS SUCH AS: EXCEL AND ASCII; INCLUDING TRADITIONAL FORMATS SUCH AS; JPG, TIF, PDF, IN COLOR AND BLACK/WHITE. ALL MUD LOG DATA IS INCLUDED; GAS & OIL SHOW EVALUATION, ROCK DESCRIPTIONS, OUR SERVICES HAVE BEEN COMPUTERIZED SINCE IN 1992.
  12. COLOR AND BLACK/WHITE LOGS - COLOR COMES WITH AN ATTRACTIVE AIRBRUSH SHADING EFFECT FOR IMPACT PRESENTATIONS, OUR PAPER COPIES COME IN 2 INCH AND 5 INCH SCALES.

History of Petrolog
1961 - 1972
PETROLOG INC. was founded in 1961 by Tom and Evelyn Williams. They initially built one logging laboratory and equipped it with Johnson-Williams gas instruments and hotwire detectors, and the best logging tools available during the early 1960's. Their focus was on the California oil and gas basins with some activity in the other western states. There were many mud logging companies operating in California and the competition was difficult. In 1968 they added a second laboratory. At that time most logging geologists worked on a contract basis and not as regular employees. Petrolog survived the drilling lows of 1971 and then they began to see change.
1973 - 1990
In 1973 things began to significantly change. Petrolog added a third laboratory and began hiring young logging geologists, trained by experienced logging veterans. This was the beginning 0f the greatest activity buildup in the history of the California oil industry. Petrolog was incorporated in 1982 with 100,000 shares of company stock. Many significant equipment and logging laboratory purchases were completed during the late 1970's - mid 1980's. Petrolog utilized analytical logging units, equipped with Varian 1400 gas chromatographs with FID gas detectors. By 1985, petrolog had as many as 30 logging geologists and 12 logging laboratories, 11 onshore units and one offshore unit. This was a once in a lifetime experience for a small family business. Our focus was on the California oil basins with some activity in the western states.

The major slow down (crash) of 1986 significantly hit Petrolog in mid 1987. Most of our logging geologists had to find work in geotechnical, environmental and hydrogeology. Tom scaled the company back and adjusted to the new reality of the industry. Many California logging companies closed or disappeared. Tom passed away in 1990, but his company lived on. His mark is on a great oil era.
1991 - 2004
John Williams, agonized about the company's future, in 1991 he assumed full time management of Petrolog. John had 12 years of major and independent oil industry experience as an exploration geologist, his company experience was both onshore and offshore, along with significant well logging experience. This combination of background gave him a unique prospective and vision. He was ready to manage Petrolog. John earned a B.S. degree from California Lutheran University and an M.S. degree from San Diego State University in geology.
Petrolog history continued - April 23, 2004

In 1992 the company began to expand and hire logging geologists. Seasoned Petrolog veterans returned, and the best logging geologists available from the industry joined our team. Our logging methods were computerized so that all the data was digital. We have continuously upgraded our logging methods, logging software, communication system, and logging products. In 1994, the company took the opportunity to expand offshore and currently owns three fully operational offshore logging laboratories. Petrolog now operates seven logging laboratories and has an excellent team of California logging geologists. In 2002 the company completed a major purchase of all new Varian 3900 (FID) gas chromatographs with the star workstation software. In 2003 petrolog purchased its own 6500 sq foot building, office and headquarters.

Petrolog is here to serve. We emphasize, technology, innovation, and computerized logging methods. We employ California logging geologists who have the well site experience to best serve our clients. We strive to provide personalized service, at a cost effective rate.
Contact John Williams at (805) 231-3793.
jtw@petrolog-geological.com