SEC Reserves Reports and Audits

Netherland, Sewell & Associates, Inc. (NSAI) was founded in 1961 to provide the highest quality engineering and geologic consulting to the petroleum industry. Clarence Netherland and Fred Sewell set standards consistent with their long-term management philosophy. Those standards have endured and have served our clients well.

An NSAI report honors all the data and industry reserves definitions to give a full and fair inventory of reserves and cash flow. Each report is based on sound judgment, broad experience, technical expertise, and accepted practices.

Our clients expect quality and integrity. We demand it.

To talk to us regarding a Reserves Evaluation, call either Scott Rees in our Dallas office at 214-969-5401 or Danny Simmons in our Houston office at 713-654-4950. We can also be contacted by email at for more information.

NSAI Certified

Since our founding over 55 years ago, we have delivered thousands of reports to petroleum and financial concerns throughout the world. Users of our reports have learned that each aspect of an NSAI evaluation is solidly supported. NSAI reserves reports have earned a reputation for reliability because of the substance behind each one. Whether it is for a small property in East Texas or a giant LNG development in the Middle East, our clients know that an NSAI report will be highly respected.

We are committed to delivering reliable results.

A World Of Experience

Our clients include small privately owned oil and gas companies, major and independent oil and gas companies, government owned oil and gas companies, financial institutions, government agencies, investors, and law firms. The petroleum consultants at NSAI offer a complete range of engineering, geological, and geophysical services and have the technical experience and ability to perform these services in any of the onshore and offshore oil and gas producing areas of the world.

Our People

Our engineers and geoscientists are all proven performers selected from major petroleum companies and independents. They understand the critical relationship that exists between our clients and the financial community. Our petroleum analysts, mapping specialists, and computer experts share the same spirit of excellence and commitment to service. All the principal disciplines of exploration and production are represented by our team.

Our people built the NSAI reputation one reserves report at a time.

Our Approach

We apply the right combination of people, expertise, and technology to each assignment. A mature field may require classical performance and volumetric analyses to assess its developed and undeveloped potential, while an integrated study with reservoir simulation may be required to fully evaluate a new discovery. Whatever the scope, the result is a substantial and reliable technical evaluation. Our process also integrates the technical evaluation with the commercial aspects of the assets. We can independently evaluate pricing, expenses, capital, and the reasonableness of future development plans. Priority is placed on keeping our clients involved during the evaluation process so we can benefit from their valuable knowledge of the properties.

We deliver a full and fair inventory of reserves and cash flow.

Your Choice

While our reputation gives us the opportunity to attract new clients, we know we must consistently deliver quality reports and provide superb service to retain existing clients. We will do our best to get you what you need when you need it. From the routine to the unexpected, our clients know they can rely on us. We expect to exceed your expectations.