top of page
Image by Arvind Vallabh

Welcome to Stag Geological Services

Stag Geologists and Engineers have delivered value in Well Operations around the globe for over 25 years.

With the launch of our solutions for Decommissioning and Carbon Storage, we have now become a full service provider for the Oil and Gas lifecycle, ready for the energy transition ahead.


Take a tour of our services and find out why operators worldwide choose Stag when they need the very best in New Well Delivery, Decommissioning, Carbon Storage Solutions and Geoscience Training.

We Help Our Clients Achieve Success in Every Well.


Wellsite, Operations and Well Planning Geologists for New Well Delivery.

Stag's Well Geoscience Team contains some of the most experienced technical experts in the world. We have a combined expertise covering many thousands of wells and including Subsea, High Pressure High Temperature (HPHT), Horizontal and Extended Reach (ERD) wells. Stag Wellsite, Operations and Well Planning Geologists will help deliver your new project to the highest standard in the global industry.

Construction Worker

The Experienced Team Player

Stag Wellsite Geologists are experienced professionals who make safety, communication and delivery their priority. Whether your challenges are formation evaluation, geosteering or pressure control, plan for success and place your Wellsite Geoscience work in the hands of a responsible and competent supervisor.

Image by bruce mars

The Well Delivery Expert

Stag Operations Geologists are mature Geoscience professionals with comprehensive Well Delivery skills and wide international experience. From digitalization to contractor supervision, your Operations Geologist will help you navigate complexity and achieve success.

Image by heylagostechie

The Well Planning Authority

Stag Well Planning Geologists deliver complete technical expertise to your subsurface team. With a international background in Wellsite and Operations Geology, your Well Planning Geologist will lead the subsurface development of your project through trajectory planning, pressure estimation, drilling optimization and post-well analysis.

Image by Dean Brierley

Engineers for Drilling and Decom.

Stag's Well Engineering Team gives our clients access to a comprehensive pool of expertise. From highly experienced Drilling Superintendents and Supervisors to Drilling and Wellsite Engineers, our team deliver results in both drilling and decommissioning.


P&A Solutions for Wells and Fields everywhere.

Since 2018 Stag has become established as the leading global supplier of subsurface design services for well P&A. Whether you need to navigate geological complexity, understand cement bond, qualify your crossflow strategy, or understand a field's potential for Carbon Storage, we can describe every aspect of your well construction and subsurface architecture. Our Well Decommissioning Framework will help you target the right operational scope, reduce risks, maximise value, and achieve success.

Young woman in a yellow work uniform, gl

A Class-leading Basis of Abandonment Design

Harness the scope of our Barrier Location Models and the technical strength of our Geological Engineering Models (GEMs) to develop an outstanding Basis of Abandonment Design for each well in your Campaign.

operator workers on offshore rig. loadin

 Solutions for Bond Assessment

Qualify your barrier strategy to ensure annular containment of hydrocarbons. Learn how our Annular Integrity Evaluation and Bond Log Verification services can help assure your chosen barrier locations.


Integrated Assurance for Crossflow

Learn how to qualify your crossflow strategy with our Reservoir Engineering, Geophysical, Structural Geology and Geopressure workflows for near-field lateral containment.


World Class Training for Operational Geoscientists.

For more than a quarter of a century, Stag has provided Wellsite, Operations and Formation Evaluation training for hundreds of Operator and other industry personnel. Our training in Operational Geoscience has become the foundation stone of a successful career in Well Delivery and the wider discipline of Petroleum Geology, with former Trainees now working in every major E&P company on Earth.

With the easing of restrictions imposed by the Coronavirus pandemic, our 2023 Scheduled Open Courses are now being delivered face-to-face at our training centre in the U.K.  Online sessions are also available if required. Wherever in the world you are located, it's now easier than ever to benefit from our world class Geoscience training. Find a course that's right for you and book your place today.


Contact Us


For all inquiries, please call +44 (0) 118 982 0151 or email

Europe (Head Office)

​3 Fortuna Court

Calleva Park, Aldermaston


Tel: +44 (0) 118 982 0151

New Business:


Get in touch: +44 (0) 118 982 0151

Contact Us


For new business enquiries, please call +44 (0) 118 982 0151 or email

Head Office (Europe & Americas)

​3 Fortuna Court

Calleva Park, Aldermaston


United Kingdom

Tel: +44 (0) 118 982 0151

Qatar (Middle East)

Al-Jaidah Square Building

Airport Road


PO Box 55743


Tel: +974 4426 7432

Aberdeen (North Sea)

​Westpoint House

Prospect Park

Prospect Road

Arnhall Business Park


AB32 6FJ

Tel: +44 (0) 1224 766 948

Perth (Oceania)

Suite 22

Como Corporate Centre

11 Preston Street


WA 6152


Tel: +61 8 9368 7468


We are always happy to hear from experienced geologists and engineers with a background in O&G well operations, decommissioning, carbon storage or geothermal drilling. To be considered for a role with us, please send a cover letter together with your C.V. to:

Get in touch: +44 (0) 118 982 0151

Connect with us on Twitter and Linkedin:

  • Twitter
  • LinkedIn
bottom of page