Shale Horizontal Drilling & Completion consulting
Well Engineering, Drilling Execution, and Completion Consulting for Unconventional/Shale and Tight Gas & Oil Resources — Worldwide
Assign your company's most challenging unconventional/shale and tight gas/oil horizontal drilling and completion engineering projects — anywhere around the world — to A&A, and let the experienced well engineering consultants of the A&A Consulting Team keep your wells on trajectory, on program, and on budget.
Avasthi & Associates, Inc. (A&A) is an independent petroleum engineering consulting firm. A&A does not sell drilling rigs, casing or tubular goods, cementing services, completion equipment, or managed-pressure-drilling (MPD) equipment — our only business is expert technical consulting, which means our well-engineering recommendations are never influenced by a stake in the rig contractor, service company, or equipment vendor being used.
The experienced well engineering consultants of the A&A Consulting Team provide advanced consulting and technical advisory services for unconventional/shale drilling and completion projects worldwide. A&A supports operators through all phases of shale development — from well planning and design, through drilling execution, completions, and well integrity — bringing extensive field and engineering experience in horizontal well design, drilling optimization, casing and cementing programs, completion architecture, hydraulic-fracturing interface support, tubular selection, and operational risk mitigation. A&A works closely with clients to improve operational performance, reduce non-productive time (NPT), enhance operational efficiency, and support safe, reliable field execution.
Related A&A Service: For A&A's broader unconventional/shale resources evaluation and development strategy — including play/resource assessment and reservoir-driven horizontal well and pad development planning — please see A&A's Unconventional/Shale Resources Development (URD) Consulting page.
Related A&A Service: For A&A's hydraulic fracturing design, DFIT/microseismic monitoring, and post-fracturing evaluation services — the reservoir-stimulation side of completions this page's drilling and completion-equipment engineering supports — please see A&A's Shale Fracturing Consulting page.
Horizontal Well Planning and Trajectory Design
A well's economics are set as much by how it is drilled as by where it is landed. The A&A Consulting Team's well engineering consultants design and QC horizontal well trajectories that are drillable, cost-effective, and aligned with the reservoir's landing-zone and completion requirements, including, but not limited to:
• Build-hold-turn trajectory design and directional-profile optimization for laterals, balancing curve severity, lateral length, and drilling cost
• Landing-zone and lateral-azimuth verification against A&A's (or the client's) geological, petrophysical, and geomechanical characterization
• Torque-and-drag and hydraulics modeling for extended-reach laterals, to confirm a well can be drilled and completed as planned before it is spudded
• Anti-collision analysis and wellbore-placement QC for multi-well pad and batch-drilling programs
Drilling Program Development and Execution Support
The A&A Consulting Team develops and supports the execution of drilling programs engineered for the specific challenges of the target shale or tight-gas/oil interval, including, but not limited to:
• Bit selection and bottom-hole-assembly (BHA) design for curve and lateral drilling performance
• Drilling-fluid program design, for wellbore stability, cuttings transport, and formation-damage minimization in the target interval
• Rate-of-penetration (ROP) optimization and real-time drilling-parameter monitoring, to reduce drilling days without compromising well quality
• Offset-well analysis and lessons-learned integration, to reduce recurring non-productive time (NPT) across a multi-well development program
Managed Pressure Drilling (MPD) and HPHT/Complex-Well Engineering
Some shale and tight-gas/oil intervals present narrow drilling margins, elevated pressures and temperatures, or other complex-well challenges that a conventional overbalanced drilling program cannot safely or efficiently accommodate. The A&A Consulting Team advises on:
• Application of Managed Pressure Drilling (MPD) where narrow pore-pressure/fracture-gradient windows, depleted-zone drilling, or wellbore-stability challenges warrant it
• HPHT well design considerations — temperature-rated equipment, kick-tolerance and well-control planning, and material selection for high-pressure, high-temperature environments
• Engineering solutions for other complex-well challenges, including extended-reach laterals, high-dogleg-severity curves, and depleted or multi-lateral offset environments
Casing, Tubing, and Cementing Design
A defensible casing and cementing design is the foundation of well integrity and of a successful multi-stage completion. The A&A Consulting Team's services include, but are not limited to:
• Casing-program design and setting-depth selection, balancing well-control, geological, and completion requirements
• Cement design and zonal-isolation planning for multi-stage hydraulically fractured wells, where cement quality directly affects fracture containment and well integrity
• Tubular and connection selection, including metallurgy selection for sour-service (H2S/CO2) or corrosive-fluid environments
Completion Architecture and Equipment Selection
Once a completion architecture is selected, that design must be translated into specific, qualified downhole hardware. The A&A Consulting Team supports:
• Completion-equipment selection — packers, sliding sleeves, frac plugs, and liner hangers — matched to the selected completion architecture and well conditions
• Vendor qualification and technical bid evaluation for completion equipment and services
• Multi-stage completion system selection support, working alongside A&A's fracturing-design consultants to ensure the wellbore hardware and the frac design are fully compatible
Related A&A Service: For A&A's completion-architecture design decisions — plug-and-perf versus sliding-sleeve system selection, cluster spacing, and stage-count optimization — please see A&A's Shale Fracturing Consulting page.
Well Integrity and Mechanical Integrity Analysis
The A&A Consulting Team performs well-integrity and mechanical-integrity analysis across the life of the well, including, but not limited to:
• Barrier verification and well-integrity risk assessment, from initial completion through the producing life of the well
• Corrosion assessment and sour-service integrity review, for wells producing corrosive fluids or exposed to H2S/CO2
• Well-integrity due diligence for workover, refracturing, or recompletion candidates
Operational Troubleshooting and Failure Analysis
When a drilling or completion problem occurs, the A&A Consulting Team provides independent, experience-based root-cause analysis and practical remediation recommendations, including, but not limited to:
• Root-cause analysis of drilling and completion failures — stuck pipe, lost circulation, casing failures, screen-outs, and similar non-productive-time events
• Development of NPT-reduction programs, translating failure analysis and offset-well lessons learned into forward-looking operational changes
• Independent second-opinion review of service-company failure investigations, before cost or liability positions are finalized
Multi-Well Pad Development Support
Full-field shale development is executed pad by pad, and A&A's well engineering consultants support the operational side of that development, including, but not limited to:
• Rig-move and batch-drilling logistics planning, to sequence multi-well pad drilling for capital and operational efficiency
• Wellhead and pad-layout engineering, coordinated with anti-collision and simultaneous-operations (SIMOPS) requirements
• Simultaneous-operations (SIMOPS) planning, where drilling, completion, and production operations occur concurrently on the same pad
Related A&A Service: For the reservoir-driven side of pad development — well spacing, stacking, and parent-child interference management — please see A&A's Unconventional/Shale Resources Development (URD) Consulting page.
Software and Technical Tools
The high-level, seasoned consultants of the A&A Consulting Team are expert users of industry-standard software and technical tools for state-of-the-art horizontal drilling and completion engineering, including:
• Trajectory, torque-and-drag, and hydraulics software: for well-path design, drillability QC, and extended-reach lateral engineering
• Cementing-design and zonal-isolation simulation software: for casing/cementing program design
• Pore-pressure and wellbore-stability software: for MPD, HPHT, and complex-well planning
• StimPlan, GOHFER, Kinetix: for coordination with A&A's fracturing-design consultants on completion-hardware/frac-design compatibility
• Python, MATLAB: for offset-well data analysis, NPT tracking, and custom drilling-performance analytics
What A&A Delivers
A shale horizontal drilling and completion consulting engagement with the A&A Consulting Team is built around the practical decisions your company needs to make, including, but not limited to:
• A drillable, cost-effective horizontal well trajectory and drilling program, engineered for your target interval
• A defensible casing, cementing, and completion-equipment program, qualified against your well conditions and completion architecture
• Practical MPD/HPHT and complex-well engineering solutions where standard drilling programs are not sufficient
• Root-cause analysis and NPT-reduction recommendations grounded in your own operational data
• High-quality final reports and executive presentations
Frequently Asked Questions
How does A&A's drilling and completion consulting relate to A&A's hydraulic fracturing consulting?
This page covers the well-construction engineering side — trajectory, drilling program, casing/cementing, and completion-equipment selection. A&A's Shale Fracturing Consulting page covers the reservoir-stimulation side — completion architecture (plug-and-perf vs. sliding-sleeve), cluster spacing, DFIT, and post-fracturing evaluation. The two are closely coordinated: the wellbore hardware this page selects must be fully compatible with the fracturing design that page develops.
Does A&A supervise drilling and completion operations on the well site?
Yes. A&A's well engineering consultants provide on-site and remote execution support across well planning, drilling, and completions, alongside program development, troubleshooting, and failure analysis — whatever level of involvement your project requires.
Can A&A review a drilling or completion program that has already been designed by our own team or another contractor?
Yes. Independent review of an existing drilling or completion program — including trajectory, casing/cementing design, and completion-equipment selection — is one of A&A's core well-engineering consulting services.
What kinds of complex-well challenges does A&A help with?
A&A advises on Managed Pressure Drilling (MPD) applications, HPHT well design, extended-reach laterals, high-dogleg-severity curves, and drilling through depleted or multi-lateral offset environments — the situations where a standard drilling program is not sufficient.
Does A&A sell drilling or completion equipment, or provide rig or service-company crews?
No. A&A is an independent consulting firm and does not sell drilling rigs, casing or tubular goods, cementing services, completion equipment, or MPD equipment, and does not provide rig or service-company crews, so our well-engineering recommendations are never influenced by a stake in any particular vendor or contractor.
Whether supporting a single well, a pilot program, or a full-field shale development campaign, A&A provides practical, experience-based engineering solutions aligned with your company's operational and commercial objectives. To engage the experienced horizontal drilling and completion consultants of the A&A Consulting Team for your shale resources development projects — around the world — please contact us.
