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1. US20200174152 - EVALUATION OF FORMATION FRACTURE PROPERTIES USING NUCLEAR MAGNETIC RESONANCE

Office United States of America
Application Number 16205353
Application Date 30.11.2018
Publication Number 20200174152
Publication Date 04.06.2020
Publication Kind A1
IPC
G01V 3/32
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
3Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation
18specially adapted for well-logging
32operating with electron or nuclear magnetic resonance
G01V 3/38
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
3Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation
38Processing data, e.g. for analysis, for interpretation or for correction
CPC
G01V 3/38
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS
3Electric or magnetic prospecting or detecting
38Processing data, e.g. for analysis, for interpretation, for correction
G01V 3/32
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS
3Electric or magnetic prospecting or detecting
18specially adapted for well-logging
32operating with electron or nuclear magnetic resonance
Applicants Hasan Kesserwan
Baker Hughes, a GE company, LLC
Guodong Jin
Inventors Hasan Kesserwan
Guodong Jin
Title
(EN) EVALUATION OF FORMATION FRACTURE PROPERTIES USING NUCLEAR MAGNETIC RESONANCE
Abstract
(EN)

An apparatus for estimating fracture properties of a resource bearing formation includes a nuclear magnetic resonance (NMR) measurement device configured to be deployed in a region of interest including a tight rock formation region, the NMR measurement device including a transmitting assembly configured to transmit an NMR pulse sequence into the tight rock formation region, a receiving assembly configured to detect NMR signals corresponding to a response of the formation region to the pulse sequence, and a processor configured to receive the NMR signals. The processor is configured to invert the NMR signals into a transverse relaxation time (T2) distribution, separate the T2 distribution based on a cut-off time into a first volumetric indicative of matrix and pore responses and a second volumetric indicative of fracture responses, estimate a pore size distribution based on the second volumetric, and calculate a fracture aperture size distribution based on the pore diameter.

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