Wellsite Geology & Operations

Trainer(s): Lisa Thieme
Duration: 5 * 4 hours online

Business context

A large amount of geological data is acquired albeit at a substantial cost when carrying out a drilling operation. Ensuring optimal quality of this information and effective reporting plays a key role during the well design and drilling operations. In addition, there is much to benefit from the later usage of the data in field studies. 

A critical component that ensures favourable and positive results requires close co-operation between geological, drilling and well engineering departments. Comprising of 5 half-day sessions, this Virtual Instructor Led Training (VILT) course aims to provide the required knowledge in order for the collaboration to be most effective and successful.

Who should attend

This VILT course is intended forgeologists and other subsurface staff involved in drilling operations who would like to work and communicate more effectively with the wellsite staff. 

Please note that this VILT course is not a preparation course for a wellsite assignment.To be able to work independently on the wellsite, a more hands-on or on-site training would be required.

Course content

At the end of this VILT course, participants will be able to:

  • Understand the techniques used by wellsite geologists in formation evaluation via:
    • quick-look analysis to assess reservoir and hydrocarbons
    • mudlog data (lithology/cutting description, gas readings)
  • Grasp the application of wellsite data in exploration and development
  • Read and use drilling reports
  • Acquire an understanding of the drilling problems caused by subsurface conditions
  • Understand the role and contributions of the geologist to the well maturation process

Learning, methods and tools

The VILT course will comprise lectures interspersed with practical and interactive exercises and quizzes to promote better understanding.

Day by day programme


  • Introduction
  • Wellsite Safety
    • Risks
    • PPE
    • Training 
  • Well Engineering Principles
    • Types of drilling rigs
    • Components of a drilling rig
    • Basics of well construction 
  • Wellsite Geology
    • What data can be acquired during drilling
    • Documentation 

Exercise: Lag time



Recap of Session 1 / Day 1

  • Operations Geology
    • Elements of well proposal
    • Formation evaluation plan
    • Picking (section) TD
    • Drilling reports 

Exercise: Drilling report & Quiz



Recap of Session 2 / Day 2 

  • Cutting Sample Description
    • Methodology of the analysis
    • Terminology
    • Challenges and pitfalls 
  • Mudlog Data
    • Lithology
    • Gasreadings 

Exercises: Cuttings description & design lithology column



Recap of Session 3 / Day 3 

  • Petrophysical Operations
    • Sources of open hole data and what data are provided by each source
    • Basic logging tool theory
    • Pressure data 
  • Quick Look Analysis and Log Correlation (Sandstone Reservoir)
    • Evaluate net sand
    • Identify HC and water zones
    • Evaluate porosity and saturation 

Exercise: Quick look analysis



Recap of Session 4 / Day 4 

  • Well Testing and Fluids
    • Reservoir scales and averaging
    • Testing and sampling 
  • Drilling Risks
    • What geohazards are there
    • How do we plan for them / mitigate them? 

Final Quiz 

Course Wrap up