Invention Grant
- Patent Title: Estimating porosity and fluid volume
- Patent Title (中): 估算孔隙度和流体体积
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Application No.: US12886962Application Date: 2010-09-21
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Publication No.: US08614573B2Publication Date: 2013-12-24
- Inventor: Chanh Cao Minh
- Applicant: Chanh Cao Minh
- Applicant Address: US TX Sugar Land
- Assignee: Schlumberger Technology Corporation
- Current Assignee: Schlumberger Technology Corporation
- Current Assignee Address: US TX Sugar Land
- Agent Kenneth Liu
- Main IPC: G01V3/00
- IPC: G01V3/00

Abstract:
The present disclosure relates to a method to estimate a subsurface formation property. A downhole logging tool is provided and disposed in a wellbore. Multiple measurements of various measurement types are obtained at various depths of investigation using the downhole logging tool. The multiple measurements may include natural gamma ray measurements, density measurements, resistivity measurements, nuclear measurements, and nuclear magnetic resonance measurements. The signal-to-noise ratio of the measured signals is increased using, for example, lateral stacking and multi-shell inversion. The subsurface formation property is estimated using the increased signal-to-noise ratio signals. The subsurface formation property may include porosity, adsorbed gas volume, free gas volume, bound water volume, free water volume, oil volume, and kerogen volume. A fluid analysis may be performed using a multi-dimensional nuclear magnetic resonance technique. Fluids such as water, oil, gas, and oil-based mud in the wellbore may be identified and/or evaluated.
Public/Granted literature
- US20110068788A1 ESTIMATING POROSITY AND FLUID VOLUME Public/Granted day:2011-03-24
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