DI-80 – Look Ahead – Pore Pressure Prediction Ahead of the Bit

Date Submitted: 10/20/98
Title: Look Ahead – Pore Pressure Prediction Ahead of the Bit
Submitted by: Gas Research Institute 8600 West Bryn Mawr Chicago, IL 60631-3562 773 399-8100
Principal Investigator(s): Mike Weiss 773 399-5484 773 864-3431 Fax mweiss@gril.org
Business Impact: The accurate prediction of pore pressure is becoming more critical as wells are being drilled deeper and in deeper water. The “operating window” narrowing between fracture gradient and pore pressure makes it increasingly difficult to plan and safely drill these wells. Accurate pore pressure prediction is paramount to safe efficient operations.
Technical Objectives: The first objective is to identify the downhole seismic source which best allows accurate measurement of pore pressure prediction ahead of the bit. Targets are a 1,000′ look ahead capability with 0.5 ppge accuracy. The second phase would be development of a pore pressure prediction ahead of the bit tool/system.
Methodology:
Deliverables: Phase I Testing and evaluation of downhole seismic sources. Phase II Pore Pressure Prediction Ahead of the Bit Tool/System.