Geosteering/ Instructor Thomas O. Arnold

This course is designed for geologists, geotechs and other geoscientist with some operations experience. Understanding standard concepts in petroleum geology are assumed for of all participants. A fundamental understanding of horizontal drilling concepts is required. A complete understanding of the Windows operating systems and the use of Microsoft Excel is necessary.


From simple spreadsheets to advanced 3D modeling software, Geosteering has evolved over the last twenty years to become one of the most important functions to assist with drilling long laterals. Working closely with the geologists and horizontal drilling engineers, the geosteerer often is the pivotal person to make the call for modifications in the well plan during drilling. This presentation will explore the evolution of this technology, its application and benefits to horizontal drilling today.



  • Use of geosteering

  • Geosteering requirements

  • Basics of Correlation and Geosteering correlation

  • LWD tools

  • Setup a geosteering project: surveys, typelog and lwd

  • Geosteer wells in a variety of facies and geologic settings:

  1. Sand

  2. Shale

  3. Carbonate

  4. Clastics

  • Understand variations of data quality

  • Interpretation of faults, bed thickness variations, depositional changes, folding, erosional surfaces and turbidites

  • Relationship to well plan

  • Creation and use of a derived typelog

  • Use of Grids as interpretation aid

  • Identify changes in well path from a plan

  • Creation of a horizontal Cross-Section from correlation

After providing an introduction to horizontal drilling, the fundamentals of correlation, an overview of LWD tool development and technology, the course concentrates on the process of geosteering and all the necessary constraints and requirements associated with the technology. Relying heavily on geology in order to understand variations in the subsurface, the course will guide the student through geosteering the curve, landing and then drilling the lateral. Employing specialized software techniques, this process will be repeated many times through different facies common to horizontal drilling today. Encountering a wide variety of geologic variations, the student will be presented with techniques to both identify these changes and resolve their affect on the wellbore in order to ensure proper well placement within the target zone.  

Registration limit: 13

Thomas O. Arnold began his energy career in the 1970s. Tom has served in numerous roles within the energy industry. From creator of one of the first drill monitoring and pore pressure detection computer systems used in the Gulf of Mexico to an exploration Petrophysicist with Superior Oil Company, his career has always been about innovation and technology. With the advent of horizontal drilling, a new avenue opened that required the use of technology in order to assist with drilling long laterals wells: Geosteering. Through an extensive study of the engineering concepts and techniques used in geosteering, Tom began geosteering wells on his own time. Quickly becoming proficient with the process, he joined Paladin Geological Services as the Geosteering Manager, steering hundreds of wells around the continental US. In addition, he became the Geosteering course developer for PetroSkills. Teaching many geosteering classes nationwide, he has given invited geosteering talks at numerous professional and educational oil field conferences and meetings. Now retired from the energy industry, he is the Planetarium Director at Science Museum Oklahoma in Oklahoma City. Tom has a BS in both Astronomy and Geology.

G016171Q Oct 2 - 6 8:00 am - 5:00 pm
Mon,Tue,Wed,Thu,Fri  $2,125.00
($2,150.00 out-of-state)
PPDC Building, 105 W. Illinois, Midland, TX
Registered: 1 Mon- Thurs 8 to 5 / Fri 8 am to Noon 36.0 Hours

Midland College is accredited by the Commission on Colleges of the Southern Association of Colleges and Schools to award certificates
and associate and baccalaureate degrees. Contact the Commission on Colleges at 1866 Southern Lane, Decatur, Georgia 30033-4097
or call 404-679-4501 for questions about the status of Midland College.

Midland College is an Equal Opportunity Employer/Educator

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