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Petroleum Engineering Consultants, Since 1961

LEARN MORE ABOUT CG&A

Petroleum Engineering Consultants

Cawley, Gillespie and Associates, Inc.

For over 60 years, Gillespie and Associates, Inc. (CG&A) has been a trusted name in Petroleum Engineering Consulting, delivering ethical and independent services to the oil and gas industry. While our tools and techniques have advanced, our core values remain unchanged. Our highly skilled team of professional Petroleum Engineering Consultants brings a wealth of expertise to meet all your consulting needs. You deserve responsive engineers and geologists who provide accurate and timely property evaluations you can rely on.

Putting our clients first, since 1961

As a petroleum consulting firm, 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 Petroleum Engineering 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
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

Reserve Reporting

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

A Few of Our Valued Clients

Petroleum Engineering Consultants Blog

August 2, 2024 in Oil & Gas Consulting

Jeff Loskorn named Partner at Cawley, Gillespie & Associates

We are thrilled to announce that Jeff Loskorn, a senior reservoir engineer with our firm since 2014, has been named a Partner at Cawley, Gillespie & Associates. Jeff has consistently demonstrated…
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October 19, 2023 in Oil & Gas Consulting

CG&A President, Todd Brooker, Shares His Oil and Gas M&A Market Outlook on Hart Energy’s A&D Minute

Jordan Soto, executive producer, Hart Energy: Where is the oil and gas M&A market heading next? Find out in this A&D Minute powered by BOK Financial Securities. Our editorial team…
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August 11, 2022 in Oil & Gas Consulting

Map data classes, how to you avoid creating a busy oil & gas map with too many similar colors

Question: When mapping data classes on a map, how do you avoid creating a busy oil & gas map with too many similar colors? Answer: A map legend with too…
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