DEA-90 – Drilling Plastic Shale at Great Depth-A Study to Improve Penetration Rates with Environmentally Acceptable Drilling Fluids

DEA-90     Drilling Plastic Shale at Great Depth-A Study to Improve Penetration Rates with Environmentally Acceptable Drilling Fluids     TerraTek judzis@terratek.com

ACTIVE PROJECT STATUS
The following is the status of active DEA Projects

DEA Project Number: 90
Project Title: Drilling Plastic Shale at Great Depth – A Study to Improve Penetration Rates with Environmentally Acceptable Drilling Fluids
Contractor: TerraTek, Inc. – 400 Wakara Way, Salt Lake City, Utah 84108 – (801)584-2441
Email: ablack@terratek.com
World Wide Web Site: http://www.terratek.com
Startup Date: January, 1995
Scope of Work: The DEA 90 project investigation has sought solutions to the field problem of slow penetration rates experienced with PDC bits while drilling plastic shales at great depths with water based drilling fluids. The field problem has been replicated in the laboratory by performing full-scale drilling tests with 6 1/2″ PDC bits in various shales at high borehole pressure (7500 psi). A total of 50 drilling tests have been conducted to date involving a number of drill bits, drilling fluids, and shale types. An understanding and application of critical drill bit design features and drilling fluid characteristics for a variety of shales relative to improved penetration rates has been achieved.
Current Status: Completed Phase 1. Phase 2 active and nearly complete. Phase 3 suggested by participants.
Projected Completion Date: March, 1998
Project Cost: Phase 1 $333,000 – Phase 2 $315,000
Participants: BP, Chevron, Dowell, Exxon, Hughes Christensen, Hycalog, Security DBS, Shell, Smith Giodiamond, Statoil
Cost per Participant: Phase 2 $30,000/original participant – Phase 1 and 2 $45,000/new participant
Comments: Seeking additional participation.


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