Well Integrity Consulting
Life-Cycle Well Integrity Due Diligence — Drilling Through Plugging & Abandonment — for Conventional, CO₂-EOR, and CO₂ Storage Wells, Worldwide
Assign your company's well-integrity due diligence — for any well, at any stage of its life cycle — to A&A, and let the high-level, seasoned well-integrity consultants of the A&A Consulting Team confirm that your wells can be trusted to hold.
Avasthi & Associates, Inc. (A&A) is an independent petroleum engineering and well-integrity consulting firm. A&A does not sell tubulars, cements, wellhead equipment, or workover services — our only business is expert technical consulting, which means our well-integrity findings and recommendations are never influenced by a stake in any particular vendor, material, or technology.
Companies evaluating mature oil fields, around the world — whether for continued production, CO₂ enhanced oil recovery (EOR), or CO₂ geologic sequestration — need to know the true condition of the wells they are acquiring or repurposing. Wells with compromised integrity, due to their age, construction, or operating history, can pose serious risks. Many mature fields also carry legacy wells that were improperly plugged and abandoned, creating a potential conduit for reservoir fluids to reach groundwater aquifers or the surface.
A rigorous well-integrity evaluation — covering every phase of a well's life, from drilling through operations, interventions, and eventual plugging and abandonment — is essential before capital is committed to a field acquisition, a redevelopment program, or a fluid-injection project of any kind.
A&A's Well-Integrity Due Diligence Services
The high-level, seasoned well-integrity consultants of the A&A Consulting Team are available to conduct due diligence, including, but not limited to:
• Well Status Evaluation: Evaluate the current status of existing wells and determine which have adequate well integrity, from a life-cycle perspective, to meet applicable fluid-injection standards
• Workover Assessment: Determine which wells will require workover(s) to meet regulatory and well-integrity requirements for their intended service
• New-Well Program Development: Develop drilling and completion programs for new and/or infill wells
Life-Cycle Well-Integrity Expertise
The expertise and experience of the high-level, seasoned well-integrity consultants of the A&A Consulting Team spans the complete well life cycle — drilling, operations, interventions, and plugging and abandonment — for all types of wells. This includes conventional producing and injection wells as well as fluid-injection wells with more specialized regulatory requirements, such as Class II wells (required for CO₂-EOR service) and Class VI wells (required for CO₂ storage/geologic sequestration objectives).
A&A Consulting Team's technical excellence, combined with a deep understanding of the regulatory and environmental aspects — and their impact on potential liabilities during an oilfield property acquisition or transfer — is of critical value to our clients' oilfield evaluation and acquisition project teams.
Related A&A Service: If your well-integrity evaluation involves CO₂ injection, please see A&A's CO₂ Injection Wells: Class II vs. Class VI Wells page for a detailed comparison of the applicable well classifications and regulatory requirements.
Related A&A Service: If your well-integrity evaluation covers orphan or legacy wells with no solvent, identifiable operator — typically funded by a state agency, non-profit, or carbon-credit project rather than by the well's original operator — please see A&A's Orphan & Legacy Well Plugging and Abandonment Consulting page for well-inventory prioritization, plugging engineering, and methane-quantification/carbon-credit support.
Representative Recent Work
A few examples of recent work performed by the high-level, seasoned well-integrity consultants of the A&A Consulting Team:
• Conducted an evaluation of existing water-injection wells for conversion to CO₂-EOR service in an active oilfield. The evaluation focused on whether the wells were mechanically sound to maintain well integrity during CO₂ injection and would meet regulatory approval for service as CO₂-injection wells in a CO₂-EOR project. The review included well construction, drilling and completion details, materials of construction (tubulars and cements), and past performance history — including well interventions, workovers, and conversions — along with injection performance history.
• Conducted an evaluation of existing wells (both producers and injectors) to assess well-integrity concerns and potential risks from an environmental-liability perspective, for the purpose of an oilfield property acquisition.
• Presented the SPE Webinar “Life Cycle Well Integrity of CO₂ Storage Wells: Engineering Imperatives for Success.”
• Presented an SPE Section Lecture, “Comparative Summary of Conventional O&G Injectors, CO₂-EOR Project Injectors, and CO₂-Storage Project Injectors.”
• Prepared the technical report “Well Engineering and Injection Regularity in CO₂ Storage Wells” for IEAGHG (the IEA Greenhouse Gas R&D Programme), UK. A major focus of the report was to incorporate lessons learned and knowledge gained from CO₂-EOR operators, from well-integrity and injectivity perspectives, and to transfer that knowledge toward maintaining life-cycle well integrity of CO₂ storage wells.
What A&A Delivers
A well-integrity evaluation from the A&A Consulting Team is built around the practical decisions your company needs to make, including, but not limited to:
• A well-by-well life-cycle integrity assessment, identifying which wells are fit for their intended service as-is, which require workover, and which should be retired or replaced
• A regulatory gap analysis against the construction and integrity requirements applicable to your project
• Workover and new-well drilling/completion program recommendations, including materials of construction suited to your wells' service conditions
• Presentation-ready findings and risk assessment for your company's management, partners, investors, and regulatory authorities
To put the high-level, seasoned geology, reservoir, production, and well-integrity consultants, and other subject matter experts (SMEs), of the A&A Consulting Team to work on your company's challenging oilfield evaluation and acquisition, and well-integrity, projects, please contact us.
