Operations & Well Site Geology

ICTD International Centre for Training and Development

ICTD International Centre for Training and Development


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Who should attend

This course is intended for all exploration and production staff who want to learn the functions that are performed by Geologists at the wellsite as well as well-site geologists, drilling and operations engineers and other staff involved in the acquisition and use of wellsite (geological) data

About the course

This course provides a complete overview of wellsite operations from the perspective of the Operations Geologist and the Wellsite Geologist. The focus is on being able to understand the job functions that are typically performed at the wellsite, and what use is made of the large amounts of data collected. The course will also provide an overview of essential drilling operations that have a direct bearing on these discliplines.

Wellsite geologists study rock cuttings from oil and gas wells to determine what rock formations are being drilled into and how drilling should proceed. They identify critical strata from core samples and rock-cutting data and build up knowledge of the structure being drilled. They are experienced geologists, deciding when specialized tests should be carried out and, ultimately, when to stop drilling. They send reports and logs of completed drilling to the operations geologist and offer geological advice to oil company representatives. They also incorporate health and safety requirements in daily geological operations. Wellsite geologists also liaise with drilling engineers, petroleum engineers and mudloggers during the course of projects.

The course will blend classroom instruction with several practical exercise sessions. If location permits, a visit to a wellsite can be arranged.

Course Objectives

Upon successful completion of this course, the delegates will be able to:

  • Learn the techniques used by wellsite geologists in formation evaluation through a combination of lectures and exercises that can typically be done at the wellsite
  • Have a good understanding and knowledge of the requirements of both Operations and Wellsite Geology
  • Participant will have grasped the basic principles of well-site data acquisition quality control
  • They will learn the techniques used routinely by well-site geologists in formation evaluation through lectures, integrated with practical exercises
  • Participants will acquire understanding of drilling problems caused by subsurface conditions, and of application of well-site data in exploration and development projects

Course Outline

Day 1


  • What is an Operations and Wellsite Geologist?
  • Exploration and Drilling Programs – Risk assessment, regional analysis, pre-drill data acquisition
  • Components of a prospect


  • The Petroleum system – elements & processes
  • The Reservoir – Sedimentary Environments
  • The Trap – Structure & Stratigraphy
  • Mapping and Cross-Sections
  • Pore Systems and Flow Units
  • Reserves and Resources – classification and categories


  • Wireline Data – open and cased hole, testing, LWD and MWD
  • Mud Logging Data – geological, drilling, pressure
  • Core Data – whole core and sidewall core

Day 2


  • The drilling team – who does what?
  • Types of Drilling rigs
  • Rig Sub-systems – power, hoisting, rotary, circulating, well control
  • Drilling tools and components – including drilling fluid
  • Well control – kicks causes – basic calculations – safety equipment – kill methods
  • Well costs


  • Well Design
  • Directional Drilling – methods and calculations
  • Geosteering


  • The Logging unit – components and functions
  • Services – monitoring, sampling, analysis
  • Cuttings analysis and description
  • The mud log
  • Safety considerations – monitoring, overpressure, downtime

Day 3


  • Gas detection and analysis – types of gas – gas shows – equipment and methods


  • Overburden and compaction
  • Pore pressure generation – estimation – normal and abnormal pressure
  • Detection from Seismic – pre-drill prediction
  • Stress and Strain – wellbore failure – lost circulation

Day 4


  • Sampling – types and preservation
  • Quality control of acquired wellsite data


  • Coring methods and equipment
  • Whole Core and Sidewall Core
  • Core handling and preservation
  • Basic calculations – core-log integration

Day 5


  • Review of basic logging tools for lithology, porosity, saturation
  • Resistivity and Invasion


  • Basic concepts – quicklook workflow
  • Determination of lithology
  • Shale – calculation of shale volume - effects and corrections
  • Determination of porosity
  • Determination of water saturation – resistivity effects – formation water
  • Analysis techniques - crossplots

Course Methodology

A variety of methodologies will be used during the course that includes:

  • (30%) Based on Case Studies
  • (30%) Techniques
  • (30%) Role Play
  • (10%) Concepts
  • Pre-test and Post-test
  • Variety of Learning Methods
  • Lectures
  • Case Studies and Self Questionaires
  • Group Work
  • Discussion
  • Presentation

Videos and materials

Operations & Well Site Geology at ICTD International Centre for Training and Development

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Coursalytics is an independent platform to find, compare, and book executive courses. Coursalytics is not endorsed by, sponsored by, or otherwise affiliated with any business school or university.

Full disclaimer.

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