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Methods and Technology in Geosteering
KO G A 20 1 5 G E O ST EE RING PA NE L L E X INGTO N, K Y K YL E G R AY – G R AY T E CHNICA L, L LC SUSAN BAR BOUR – R UBICON G EOLOGICAL CONSULTING, LLC
Overview • What is Geosteering?
• Methods of Geosteering
• Paper and Digital Logs
• Technical Geosteering
• Innovations and Improvements
• Open Panel Discussion
Geosteering
• The intentional directional control of a well
(Schlumberger Oilfield Dictionary)
Geosteering
• The intentional directional control of a well
• Downhole geological logging measurements
(Schlumberger Oilfield Dictionary)
Geosteering
• The intentional directional control of a well
• Downhole geological logging measurements
• Compares to a local known log
(Schlumberger Oilfield Dictionary)
Geosteering
• The intentional directional control of a well
• Downhole geological logging measurements
• Compares to a local known log
• Keeps wellbore within a pay zone or target, or away from areas desired to avoid
(Schlumberger Oilfield Dictionary)
Correlation via Logs Pros ⁺ Easy and inexpensive
Correlation via Logs Pros ⁺ Easy and inexpensive ⁺ Requires few resources
Correlation via Logs Pros ⁺ Easy and inexpensive ⁺ Requires few resources
Cons ⁻ Difficult to share data and reports
Correlation via Logs Pros ⁺ Easy and inexpensive ⁺ Requires few resources
Cons ⁻ Difficult to share data and reports ⁻ Changes in character between logs can cause issues
?
Correlation via Logs Pros ⁺ Easy and inexpensive ⁺ Requires few resources
Cons ⁻ Difficult to share data and reports ⁻ Changes in character between logs can cause issues ⁻ Requires manual calculation of estimated bedding
dip and geometry
TVD2 = TVD1+(Tan(dlc/2)*((MD2-MD1)/dlc))*(Cos(Inc.xDls)+Cos(Inc*Dls))
D’=Tan-1((TVD2-TVD1)/(MD2-MD1))
Correlation via Computer
Innovations Make Geosteering Fast, Easy, & Affordable
Innovations and Improvements in Geosteering
Quicker and Easier Data Management
Innovations and Improvements Quick Data Entry
Quick setup Copy, Paste, Import .las No manual calculations
Innovations and Improvements Assess Well Plan
Distance to Plan and Target
Innovations and Improvements Paper Logs? No Problem
Digitize …and Go!
Innovations and Improvements in Geosteering
Explore LWD Feeds
Innovations and Improvements Move Around in the Data
Intuitive View Changes:
Use arrows, selection, mouse wheel, keyboard
Scroll Pan
Innovations and Improvements See What You Need to See
Intuitive View Changes:
Use arrows, selection, mouse wheel, keyboard
Zoom in/out all Zoom only one axis
Innovations and Improvements Locate Peaks
Mouse locates position on all screens
Innovations and Improvements Curve Smoothing
Noisy Data is No Problem
Innovations and Improvements in Geosteering
Make Intelligent Steering Decisions
Innovations and Improvements Compare LWD – Digital Sliding
Editing gamma, faulting
Sliding gamma rotates & calculates bedding dip to reflect correlation
Innovations and Improvements Active Dip Models
Data needs adjusted
Innovations and Improvements Compare LWD Quickly
Bridge Correlation Between Known Points
Hide Gamma
Innovations and Improvements Project Ahead of Bit
Calculate Estimated Bedding and Target
Innovations and Improvements in Geosteering
Quicker, Easier, Clearer Communication
Innovations and Improvements Visualize Target and Formations
Button click: Full control of all - Colors - Targets - Plans - Horizons
Innovations and Improvements Plan or TVD View? MD or VS Plotting?
MD or VS axis plotting
Plan view or cross sectional view
Innovations and Improvements Graphics & Reports – Easily Publish
Quick Reporting Customize layout & data
Innovations and Improvements Quick Data Export
Quickly Export Data
Innovations and Improvements in Geosteering
Comparability to Regional Wells
Innovations and Improvements Compare Multiple Models
Innovations and Improvements Compare Multiple Wells
Grid and contour using area wells or adjacent laterals
Update target horizon each survey
Update Surface Stay in Target
Innovations and Improvements Geosteering Increases Production
Map fractures, avoid hazards & undesirable zones
Soft
Keep Drill in Target
Geosteering Panel Discussion
Quicker and Easier Data Management
Explore LWD Feeds
Make Intelligent Steering Decisions
Quicker, Easier, Clearer Communication
Compare to Regional Wells
Increase Production
Geosteering Panel Discussion
E-mail:
Website:
http://www.rigsteersoftware.com/
Services
• Mudlogging
• Geosteering (field or remote)
• Gas detection/analysis
• Prospect analysis
• Well planning
Loggers are all degreed geologists All crews have rig experience Training is core in value
