Services / Disciplines / Capabilities

Our Services

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Netherland, Sewell & Associates, Inc. (NSAI) provides a complete range of geological, geophysical, petrophysical, and engineering consulting services and has the technical experience and ability to perform these services in any of the onshore and offshore oil and gas producing areas of the world.

We appreciate our clients and will do our best to get you what you need, when you need it. Our clients consistently receive superb service and reliable, respected reports. We expect to exceed your expectations.

Click on any of the services listed below for more information.
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    Acquisition & Divestiture Evaluations

    We frequently advise our clients on their potential acquisition or divestiture of oil and gas assets, and have worked with most of the A&D groups in the energy industry.

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    Carbon Capture, Utilization and Storage

    Whether injecting into depleted hydrocarbon-bearing formations or into regionally-extensive aquifers, NSAI has the expertise to certify the subsurface aspects of your carbon capture project.

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    Carbon Intensity & Greenhouse Gas (GHG) Management

    Our experience in providing third-party evaluations and audits can be applied to developing independent, climate-related disclosures related to carbon intensity and GHG emissions reporting.

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    Coal Seam Gas Development Studies

    We have worked with most of the top operators in almost every major producing CSG/CBM basin in the world.

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    Competent Person's Reports

    In addition to the SEC, our reports are used by clients for filings with regulatory agencies such as the Alberta Securities Commission, and for equity offerings on the New York, London, Alberta, Hong Kong, and other stock exchanges.

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    Deepwater Development Studies

    Our experts have focused experience in deepwater depositional environments and have worked on some of the most technically challenging deepwater projects around the world.

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    Enhanced Recovery Projects

    The staff of NSAI has extensive experience with enhanced recovery projects worldwide, including evaluations of the largest nitrogen flood, the largest CO2 floods, and the largest gas recycling project in the world.

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    Equity Determinations

    We have extensive experience with equity determinations, evaluating original oil- and gas-in-place and recoverable reserves from within and across lease boundaries to determine ownership of current and produced volumes.

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    Gas Storage Development Studies

    We have been performing engineering and geologic evaluations of storage reservoirs for over 30 years and have accumulated relevant gas storage experience measured in tens of thousands of man-hours.

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    Litigation Support and Dispute Resolution

    Our experts can advise clients and their legal teams on technical preparation for a case, prepare detailed expert and rebuttal reports, and provide expert witness testimony.

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    Midstream Services

    Our technical staff can apply its extensive experience in upstream evaluations to the midstream sector, adding value to development planning or for acquisition/divestiture purposes.

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    Operations Engineering Services

    With our first-class services and a series of cooperative alliances we are able to assist our clients with a variety of operational needs.

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    Project Finance Certifications

    We are frequently selected by companies to certify their reserves in preparation to finance a major project, and often serve in the role of advisor to an array of lending institutions.

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    Unconventional Oil and Gas

    We have been involved in all major unconventional plays in North America and in emerging unconventional plays worldwide. Our insights are delivered on the lease, local, and regional levels.

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    Prospective Resources Assessments

    We provide integrated geologic, engineering, and economic assessments. Our experts are proficient in probabilistic resources estimation and conducting thorough prospect risk assessments.

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    Reservoir Simulation

    Our Reservoir Simulation experts have been evaluating reservoirs around the world employing industry standard simulation tools for over 30 years.

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    SEC Reserves Reports and Audits

    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.

Services / Disciplines / Capabilities

Disciplines & Capabilities

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Our technical staff is intimately familiar with the recognized industry reserves and resources definitions, specifically those set forth by (1) U.S. Securities and Exchange Commission Regulation S-X Rule 4-10(a), (2) the 2018 Petroleum Resources Management System approved by the Society of Petroleum Engineers, and (3) the Society of Petroleum Evaluation Engineers (Calgary Chapter) and Canadian Institute of Mining, Metallurgy & Petroleum (Petroleum Society). We employ deterministic methods to estimate reserves for most evaluations and also utilize stochastic methods to determine probabilistic estimates of reserves for many exploration studies, early field development projects, and large field developments.

Click on any of the items listed below for more information.
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    Geology & Geophysics

    Extensive experience with complex structural and stratigraphic fields throughout the world, including many with unconventional reservoirs such as fractured basement, tight gas, and coalbed methane.

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    Petrophysics

    Experience in the evaluation of a wide range of complex lithology in clastic and carbonate reservoirs, including fractured reservoir analyses in clastic, carbonate, shale, and basement environments.

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    Engineering

    Experienced in a range of reservoir engineering services including reserves determinations, reservoir simulation, material balance, production analysis, well test analysis, and wellbore inflow/outflow modeling.

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    Economics

    Our in-house proprietary economics system and industry-standard software are used to estimate future producing rates, future net revenue, and the present value of such future net revenue in accordance with industry standards.