WPFT1: Geological Control on Drilling Performance

Target Audience
Subsurface and drilling personnel involved in Well Planning and Delivery:
  • Well Planning Engineers
  • Drilling Engineers
  • Exploration Geologists
  • Operations Geologists
  • Wellsite Geologists
Course Aims
To examine rocks in the field and build a mutual understanding, within the team, of why rocks drill the way they do.
  • To understand the geological significance to drillers
  • To understand the drilling significance to geologists.
  • To appreciate geology that is predictable and what is not
  • To help reduce uncertainty and geological NPT.
  • To promote the value of field and outcrop analogue, in the well planning process.
  • To improve performance in a cost challenged environment.
Delegates will learn that:
  • During post-well evaluation of drilling problems it is often apparent that warning signs were missed, not recognised or ignored. 
  • Inappropriate reaction to observed warning signs often exacerbate or escalate problems.
  • Many geology related issues experienced while drilling, or geological NPT, can be predicted and mitigated during well planning
  • Appropriate mitigation to unforeseen geological events experienced while  drilling can be developed and  promoted within a team to ultimately yield improved performance.
Course Length
5 Days
Course Fee
On Application
WPFT1: Course Outline
Workshop Overview
A short field course to examine Geological control and influence on drilling predictability and performance.
It is a practical workshop, predominately field based using locations in and around Dorset and Somerset, southern UK.
Course Summary
The standard workshop is based in Dorset and travels to other locations in Somerset. Bespoke workshops can be designed around other areas of relevant geology specific to client requirements. This is particularly useful if a team wants to gain an appreciation of drilling considerations around a particular stratigraphy, structure or lithology, or perhaps to gain a better understanding of  perceived or historically recognised problems.
Discussion Topics
  • Drilling unconsolidated, and poorly cemented sands
  • Mudrocks matter to drillers!, and getting to grips with gumbo
  • Sandstones, Chalk,  Marl and Limestone - Planning for and managing losses
  • Geological Scale -Seismic vs log resolution vs outcrop scale
  • Faults, folds and other geological structures at various scales,  and the problems that they can cause
  • Bedding, Joints and other discontinuities and their influence on drilling
  • Hard bands and negative drill breaks
  • Geological control on directional drilling and geosteering
  • Ledging, Key-seating and wellbore geometry
  • Considerations for casing running and shoe positioning
  • Predicting  and mitigating drilling problems  during the well planning process
  • Using drilling data to interpret geology in the absence of logs
  • Geosteering, geostopping and geology at the bit
  • Predicting and mitigating wellbore Instability
  • Understanding how geological uncertainty adds to the challenge of drilling
  • Reservoir, Source and Seal rocks, Oil seeps