Horizontal Well Drilling and Geosteering

duration: 3 days
format: Virtual course
level: Intermediate
accreditation: CPD


During our virtual course, we cover the theory, then apply it to real-life examples. We have created an “on-the-job” environment that brings the theory to life.
Through our carefully designed course, we offer close to reality simulation of everyday decisions a geosteerer must face at work. You will practice the process of geosteering a well that is drilled at a speed of 250 feet per hour. You will be exposed to time pressure, presented with unclear real-time data and challenged by the ambiguity of the steering direction. You will experience the feeling of being a geosteerer.
Our course, packed with all-possible geosteering challenges, explains step by step the complexities of the decision-making process. You will not simply participate in this course, but you will be part of it and shape its content with others. You will speak, discuss, observe and take decisions.
You have never experienced anything like this before.

The objective of the course is to introduce, understand and apply the concept of geological well placement, provide the knowledge of the processes and techniques that are used to successfully place horizontal and deviated wells using geological and petrophysical data in real-time.

This will be achieved by:

  • Learning step by step every aspect of the decision-making process that geosteering teams face on a daily basis.
  • The practice of various geosteering techniques and rules involved in directional drilling, calculations, and formation evaluation while drilling.
  • Applying Geosteer Well On Paper (GWOP) concept, a new step in the well delivery process that involves all steering activity’s due diligence.


The course is designed for:

  • Geosteerers, Operations Geologists, Wellsite Geologists, Operations Petrophysicist, Operations Team Leads
  • Drilling Engineers, Directional Drillers, MWD and LWD specialists, Mudloggers and Data Engineers
  • Students of Petroleum Engineering, Drilling and Geology who aspires to work in the Oil & Gas upstream industry
  • Anyone who aspires to become a member of an operational team that drills deviated and horizontal wells
  • Anyone who would like to understand or improve the understanding of the geosteering science

Day 1
Geological Well Placement and Reservoir Geology

  • Basic concepts and application
  • Essential elements of reservoir geology
  • Structural features
  • Steering systems
  • BHA steering tendencies
  • BHA orientation and tool face
  • Real-time data transfer


  • MWD directional drilling, surveys and position uncertainties


  • MWD directional surveys
  • Survey calculation methods
  • Survey spacing
  • Static and instantaneous surveys
  • Surveying instruments
  • The ellipsoid of uncertainty
  • Collision avoidance
  • Structural uncertainty


Day 2
Well trajectory

  • Geological and drilling targets
  • Dogleg severity DLS limitations
  • Build rate
  • BHA tool building capabilities
  • Steering modes and steering ratios
  • Well trajectory planning
  • Sidetracks and obstacles avoidance trajectories
  • Practical examples of geosteering limitations imposed by different trajectory type


  • Application of LWD measurements for geosteering.


  • Azimuthal borehole images
  • Image patterns and their interpretation
  • Deep directional electromagnetic measurements (remote boundary detection)
  • Proactive and reactive geosteering
  • Cross-sections displays (distortions and projections)
  • Overview of available LWD technologies free of vendor bias


Day 3
Geosteering Methods

  • Geosteering principles
  • Bed dip, bed thickness and incident angle calculations
  • True dip versus apparent dip measurements and usage
  • Well landing strategy
  • Geosteering using true stratigraphic thickness
  • Drop rate and inclination changes
  • Horizontal trajectory management
  • Target change techniques
  • Geosteering simulation – team exercise


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