Invention Grant
- Patent Title: Maximum depth of investigation of measurements in a formation
- Patent Title (中): 地层测量的最大深度调查
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Application No.: US13048833Application Date: 2011-03-15
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Publication No.: US09043153B2Publication Date: 2015-05-26
- Inventor: Jean-Michel Denichou
- Applicant: Jean-Michel Denichou
- Applicant Address: US TX Sugar Land
- Assignee: Schlumberger Technology Corporation
- Current Assignee: Schlumberger Technology Corporation
- Current Assignee Address: US TX Sugar Land
- Agent Kimberly Ballew
- Main IPC: G06F19/00
- IPC: G06F19/00 ; G01V3/18

Abstract:
The present disclosure relates to a method to determine a volume of clearance surrounding a wellbore. A logging tool is provided. The logging tool may be disposed on a wireline, a drill string, or a wired drill pipe. A formation property is obtained using the logging tool. The formation property may include a voltage, a bulk resistivity, a horizontal resistivity, a vertical resistivity, a porosity, a permeability, a fluid saturation, an NMR relaxation time, a borehole size, a borehole shape, a borehole fluid composition, an MWD parameter, or an LWD parameter. The maximum depth of investigation into the subsurface formation is determined using a model response and a noise level, and the volume of clearance is determined using the determined maximum depth of investigation. The maximum depth of investigation and volume of clearance may be determined even though no boundary layers are detected.
Public/Granted literature
- US20120239300A1 MAXIMUM DEPTH OF INVESTIGATION OF MEASUREMENTS IN A FORMATION Public/Granted day:2012-09-20
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