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Oil and Gas Reserves Evaluation and Reporting, Since 1961

LEARN MORE ABOUT CG&A

Oil and Gas Reserves Evaluation and Reporting

Cawley, Gillespie and Associates, Inc.

For over 60 years, Gillespie and Associates, Inc. (CG&A) has been a leader among Oil and Gas Reserves Evaluation Consultants, serving the oil and gas industry with integrity and expertise. While our methods and tools have advanced, our commitment to providing ethical, independent evaluations has remained constant. Our experienced team of professional Oil and Gas Reserves Evaluation Consultants is equipped to handle a wide range of consulting needs. You deserve reliable engineers and geologists who deliver accurate property evaluations, on time, every time.

Putting our clients first, since 1961

As an Oil and Gas 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
  • 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

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monthly oil opex vs oil production

Oil & Gas Operating Expenses – Guidelines on Preparing Reasonable & Compliant Forecasts

Oil and Gas Reserves Reporting - 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! Background - SEC & SPE/PRMS rules Both the SEC and the SPE/PRMS rules require that oil and gas volumes must be economic to qualify as reserves, yet there is little specific guidance on how those calculations are to be conducted. In this article, we’ll be focusing our discussion on Operating Expenses (OpEx). What do the different rules systems require and what are best practices? SPE/PRMS The…
oil and gas prices for sec report

What Oil & Gas Prices Do I Use for an SEC Report?

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! Introduction The Securities and Exchange Commission’s (SEC) stated rule for prices used to estimate oil and gas reserve value is found in the Proved Reserves definition of Regulation S-X where it states, “The price shall be the average price during the 12-month period prior to the ending date of the period covered by the report, determined as an unweighted arithmetic average of the first-day-of-the-month price for each month within such…
calculate oil gas pricing differentials

How to Calculate Oil & Gas Price Differentials – Best Practices

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! Introduction In our previous article, we discussed the proper selection of benchmark pricing, ensuring that the price index employed best represents the characteristics of the hydrocarbon sales/reserves being evaluated. Ultimately, the pricing benchmark employed should be proportionally correlated to the prices received. Once this selection process is completed, it is critical to define the mathematical difference (‘differential’) between the benchmark pricing and the actual prices received. The differential is the result of location…