Formation modeling while drilling for enhanced high angle for horizontal well placement

US8489375B2 · kind B2 · utility

Assignee

• SCHLUMBERGER TECHNOLOGY CORPORATION · US

Inventors

• Dzevat Omeragic · Lexington, US
• Tarek M. Habashy · Burlington, US
• Valery Polyakov · Brookline, US
• Raymond Kocian · Osprey, US
• Yong-Hua Chen · Newtown, US
• Sofia Davydycheva · Sugar Land, US
• Raphael Altman · Houston, US
• Carlos Maeso · Doha, QA
• Douglas Hupp · Anchorage, US

Key dates

• Filing date: Sep 8, 2008
• Grant date: Jul 16, 2013
• Expiry date: Feb 14, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G01V11/00
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

LWD measurements to be used for proactive well placement while drilling a high angle or horizontal wellbore in a reservoir are defined. An initial reservoir model is provided and a section is extracted for a planned wellbore trajectory. A secondary model is generated for the planned trajectory. An area of interest is identified where statistical uncertainty is high. Possible causes of the statistical uncertainty are identified that are not present in the initial reservoir model. A set of parameters are defined based on the possible causes of statistical uncertainty. The area of interest is logged with LWD tool. Sensitivities of the LWD tool response to a subset of parameters are evaluated by performing tertiary model for a range of the subset of parameters. The most sensitive parameters from the subset of parameters and corresponding measurements are identified. LWD measurements are defined based on the most sensitive parameters.