Advisory Services
A&A Consulting Services for Legal Consulting, Third-Party Review and Assessment, Research and Analysis, and Full Field Review — Independent Technical Expertise for Disputes, Investment Decisions, and Investigations — Worldwide
Assign your company's legal, technical due-diligence, research, or field-review challenges to A&A, and let the high-level, seasoned consultants of the A&A Consulting Team put decades of hands-on industry experience and independent judgment to work for you, around the world.
Whether the challenge is a dispute headed to arbitration — energy was the second-largest sector in the ICC's record 2025 caseload, at 15% of the 894 new cases filed — or a major investment decision — U.S. upstream M&A alone reached $38 billion in the first quarter of 2026 — every one of those situations turns on the same thing: an accurate, independent technical answer, delivered by someone with no stake in what that answer turns out to be. That is the common thread running through A&A's four Advisory Services.
Avasthi & Associates, Inc. (A&A) is an independent petroleum engineering and geoscience consulting firm. A&A does not represent business interests in the underlying matter, sell technology or equipment connected to it, or hold equity in any project, transaction, or dispute it advises on — our only business is expert technical consulting, which means A&A's advisory opinions are formed strictly from the technical record, not from a stake in the outcome.
A&A's Advisory Services
A&A's advisory practice is organized into four consulting services, each with its own dedicated page describing A&A's methodology, project experience, and deliverables in depth:
1. Legal Consulting
Litigation support, expert witness testimony (testifying and consulting expert services), arbitration support, and Production Sharing Contract (PSC) and agreement review — for oil & gas and energy disputes in courts and arbitral institutions worldwide.
2. Third-Party Review and Assessment Services
Independent review and assessment of reserves and resource estimates, production forecasts, field development plans, and EOR/IOR and CCS/CCUS project technical work — validating technical work already performed, ahead of a major investment decision.
3. Research and Analysis Services
Technical research, data analysis, and investigative studies for oil & gas, chemical, technology, and financial-sector clients — building new technical analysis from proprietary or public-domain data on an open-ended question.
4. Full Field Review (FFR) and Acquisition/Divestiture Technical Due Diligence
Comprehensive, multi-disciplinary technical assessment of an oil & gas field — subsurface through facilities through economics — built from the ground up to support an acquisition, divestiture, or major capital investment decision.
How A&A's Advisory Services Fit Together
The four services above address different moments in a company's technical decision-making, though A&A clients engage A&A at whichever point their situation actually needs support:
• Legal Consulting: the matter is, or may become, a dispute — in litigation, arbitration, or contract interpretation
• Third-Party Review and Assessment: validating or challenging a reserves, production, FDP, or project estimate that has already been prepared by your team or by another consultant
• Research and Analysis: building new technical analysis from data on an open-ended question, rather than reviewing an existing estimate
• Full Field Review (FFR): building a comprehensive independent technical assessment of a field from the ground up, typically ahead of an acquisition or divestiture decision
Why Companies Choose A&A for Advisory Services
• Independent: no business interest, technology, or equity stake in the underlying matter — A&A's advice is unconflicted
• Technically deep: credentialed petroleum engineers and geoscientists, including licensed Professional Engineers (PEs) and Professional Geologists (PGs), not generalist advisors
• Proven over time: more than three decades of third-party studies, expert engagements, and research projects for some of the world's largest oil & gas operating companies
What A&A Delivers
An Advisory Services engagement with the A&A Consulting Team is built around the practical decision your company needs to make, including, but not limited to:
• An expert report, consulting-expert analysis, or PSC/agreement review memorandum for a legal or arbitration matter
• An independent reserves, FDP, or project review report ahead of a major investment decision
• A technical research report, data analysis study, or investigative report on an open-ended question
• A comprehensive Full Field Review supporting an acquisition, divestiture, or capital investment decision
Frequently Asked Questions
Which A&A Advisory Service is the right starting point for our situation?
It depends on what you're facing. An active or potential dispute typically starts with Legal Consulting. Validating an estimate your team or another consultant already prepared typically starts with Third-Party Review and Assessment. An open-ended research question typically starts with Research and Analysis Services. An acquisition, divestiture, or major capital decision typically starts with a Full Field Review. Many engagements draw on more than one, and A&A's consultants can help identify the right entry point.
Can A&A combine more than one Advisory Service on the same engagement?
Yes. A Full Field Review or Third-Party Review finding can become the technical foundation for a subsequent Legal Consulting matter, and a Research and Analysis study can inform either. A&A's consultants regularly work across more than one Advisory Service on the same underlying project.
How does A&A handle confidentiality across these engagements?
A&A treats all client information and data as strictly confidential, governed by a non-disclosure agreement executed before any proprietary data is shared, across every Advisory Service.
Does A&A sell any product or hold equity connected to the matters it advises on?
No. A&A is an independent petroleum engineering and geoscience consulting firm. A&A does not represent business interests in the underlying matter, sell technology or equipment connected to it, or hold equity in any project, transaction, or dispute it advises on, so A&A's advisory opinions are never influenced by a stake in the outcome.
Whether you are heading into a dispute, evaluating an investment, researching an open technical question, or reviewing a field for acquisition or divestiture, the A&A Consulting Team can bring independent, decision-grade technical judgment to your situation. Please contact us for a tailored proposal for your company's advisory project.
