Independent Petroleum Consultants, Since 1961

LEARN MORE ABOUT CG&A

Independent Petroleum Consultants

Cawley, Gillespie and Associates, Inc.

Independent Petroleum Consultants, Gillespie and Associates, Inc. (CG&A) began serving the oil and gas industry over 60 years ago. Though our methods and tools have evolved since that time, our values have not. We still provide ethical and independent petroleum engineering services. Our extremely capable team of professional petroleum engineering consultants have broad range of experience and capabilities to serve all your petroleum consulting needs. You deserve responsive engineers and geologists delivering reliable property evaluations… on time!

Putting our clients first, since 1961

As an Independent Petroleum Consultant, CG&A reviews and evaluates hundreds of thousands of oil and gas properties on an annual basis worth billions of dollars. Our clients include oil and gas companies, financial institutions, midstream/pipeline companies and individual investors. With diversified experience in oil and gas producing properties throughout North America and around the globe, CG&A’s proficient team of petroleum engineering consultants, reservoir engineers and geologists integrate geological, geophysical, engineering and economic data to produce high-quality reserve estimates and economic forecasts.

  • Office locations in Fort Worth, Houston, and Austin, Texas, USA
  • 30+ Petroleum Engineering Consultants, Geologists and Technical Analysts
  • Worldwide producing basin experience, unconventional and conventional
  • Approved by all major banks, key regional banks, and private equity firms
  • Deep experience with SEC, SPE-PRMS and COGEH guidelines and reporting

Our Services

CG&A’s talented staff of Independent Petroleum Consultants, Geologists, Technical Analysts, Economists, and Software Developers is here for all of your oil and gas property evaluation needs.

  • Texas Professional Engineering Firm (F-693)
  • Ability to pool resources from each office to prepare the best team for your project
  • Access to third-party experts and services for special projects
  • Deep experience in SEC, SPE-PRMS and COGEH reporting
  • Direct relationship with key SEC auditors
  • Regularly attend data rooms and assist clients with acquisitions and/or divestitures
  • Approached by all major banks, key regional banks, and private equity firms
  • Oil and Gas Reserves Evaluation
  • Oil and Gas Reserves Reporting
Engineering

Estimation of petroleum reserves and resources

Geoscience

Analyzing wireline logs, mud & drilling logs, cores & core data

Economics

Economic evaluation of petroleum properties

Resource Studies

CG&A regularly prepares volume-oriented field studies and basin analyses for investors and midstream clients

Oil and Gas Reserve Reporting

Classifying and quantifying reserves & resources, and determining associated net present value.

Oil and Gas Reserves Evaluation Blog

June 2, 2022 in Oil & Gas Consulting

Proved Reserves Beyond Low (LKO) and High (HKO) Known Oil

Warning This article and series is specifically targeted for anyone involved or interested in oil and gas reserves reporting guidelines, methods, issues, calculations and pitfalls. Proceed at your own risk!…
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May 21, 2022 in Oil & Gas Consulting

Booking PUDs in a “Proven Area”… Use Caution Applying Reliable Technology

Warning This article and series is specifically targeted for anyone involved or interested in oil and gas reserves reporting guidelines, methods, issues, calculations and pitfalls. Proceed at your own risk!…
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May 2, 2022 in Oil & Gas Consulting

What are the SEC Rules for Reserves, and where can I find them?

Introduction Thank you for tuning in to our "Road to Reserves Reporting" series that posts new content every week. Please follow us at #CGAReservesReporting to see all the posts, which will accumulate…
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