Why Geosteer a Horizontal Well?
• How will geosteering a horizontal wellbore save drilling dollars?
• What can be learned from a horizontal wellbore about the geology in an area that we
don’t already know from vertical wells and seismic?
• Are there “sweet spots” we should target?
• How can Post Drill Analysis of horizontal Wellbores that have already been drilled improve the performance of new wells?
• How do we use the geologic interpretation of data from a horizontal well to improve
BENEFITS OF GEOSTEERING
GEOSTEERING IS ABOUT MORE THAN JUST STAYING IN ZONE
• IT’S ABOUT SAVING DRILLING DOLLARS
• Landing the curve into the correct stratigraphic position the first time
• Drilling hazard avoidance! (i.e. slow drilling zones)
• Prevention of sidetracks due to incorrect targeting because of unexpected geologic
hazards such as:
• Faults cut in the build section • Anomalous dips through the build section
• IT’S ABOUT UNDERSTANDING THE GEOLOGY
• TSPM shows you all the warts. Details that can be seen in no other way. (Small faults,
anomalous dips, stratigraphic variation)
• Every area has its own unique characteristics that can be planned for if they are known
• Identifying Karsted and Faulted areas
• The only way to identify “sweet spots” in the formation is to know which section each well drilled
IT’S ABOUT UNDERSTANDING WELL PERFORMANCE
• Post Drill analysis of poor wells can reveal re‐drill opportunities
• Post Drill analysis of excellent performers may identify “sweet spots” within the reservoir
• Analysis of the structure and stratigraphy will give the operator a better understanding of reservoir performance versus reservoir placement