DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Distributed measurement of minimum and maximum in-situ stress in substrates

Abstract

A system for performing distributed measurements of in-situ stress includes an expandable element with at least one fiber optic sensor. The expandable element can be positioned at various depths in a hole in a substrate. A pressurizing device expands (and contracts) the expandable element when the expandable element is inserted in the hole in the substrate to exert pressure on the hole wall. A pressure sensor provides a sensor output indicative of a pressure applied to the hole wall by the expandable element. The fiber optic sensor and an optical interrogator measure strain along a length of the sensor in a continuous, high spatial resolution manner Based on the measured strain and pressure sensor output, the system determines various properties of the substrate such as, minimum principal stress, maximum principal stress, and/or principal stress direction associated with one or more fractures in the substrate, as well as substrate modulus.

Inventors:
; ;
Issue Date:
Research Org.:
Luna Innovations, Roanoke, VA (United States); Tennessee Technological Univ., Cookeville, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1824024
Patent Number(s):
11022717
Application Number:
16/114,376
Assignee:
Luna Innovations Incorporated (Roanoke, VA); Tennessee Technological University (Cookeville, TN)
Patent Classifications (CPCs):
E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
G - PHYSICS G01 - MEASURING G01L - MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
DOE Contract Number:  
SC0015129
Resource Type:
Patent
Resource Relation:
Patent File Date: 08/28/2018
Country of Publication:
United States
Language:
English

Citation Formats

Ohanian, III, Osgar John, Vandenberge, Daniel R., and Davis, Matthew Anthony. Distributed measurement of minimum and maximum in-situ stress in substrates. United States: N. p., 2021. Web.
Ohanian, III, Osgar John, Vandenberge, Daniel R., & Davis, Matthew Anthony. Distributed measurement of minimum and maximum in-situ stress in substrates. United States.
Ohanian, III, Osgar John, Vandenberge, Daniel R., and Davis, Matthew Anthony. Tue . "Distributed measurement of minimum and maximum in-situ stress in substrates". United States. https://www.osti.gov/servlets/purl/1824024.
@article{osti_1824024,
title = {Distributed measurement of minimum and maximum in-situ stress in substrates},
author = {Ohanian, III, Osgar John and Vandenberge, Daniel R. and Davis, Matthew Anthony},
abstractNote = {A system for performing distributed measurements of in-situ stress includes an expandable element with at least one fiber optic sensor. The expandable element can be positioned at various depths in a hole in a substrate. A pressurizing device expands (and contracts) the expandable element when the expandable element is inserted in the hole in the substrate to exert pressure on the hole wall. A pressure sensor provides a sensor output indicative of a pressure applied to the hole wall by the expandable element. The fiber optic sensor and an optical interrogator measure strain along a length of the sensor in a continuous, high spatial resolution manner Based on the measured strain and pressure sensor output, the system determines various properties of the substrate such as, minimum principal stress, maximum principal stress, and/or principal stress direction associated with one or more fractures in the substrate, as well as substrate modulus.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2021},
month = {6}
}

Works referenced in this record:

Communication Using Distributed Acoustic Sensing Systems
patent-application, June 2017


Depth Correction Based on Optical Path Measurements
patent-application, June 2015


Using Downhole Strain Measurements to Determine Hydraulic Fracture System Geometry
patent-application, November 2016


Force Monitoring Tractor
patent-application, September 2009


Apparatus and Methods of Fluid-Filled Fracture Characterization
patent-application, September 2017


Systems and Methods for Measuring a Profile Characteristic of a Glass Sample
patent-application, May 2014


Compaction monitoring system
patent, July 2007


Maximizing Hydrocarbon Production While Controlling Phase Behavior Or Precipitation Of Reservoir Impairing Liquids Or Solids
patent-application, January 2012


Monitoring of Hydraulic Fracturing Operations
patent-application, May 2016


Reliable Downhole Data Transmission System
patent-application, November 2009


Methods for Determining Formation Strength of a Wellbore
patent-application, July 2013


High Spatial Resolution Distributed Temperature Sensing System
patent-application, October 2010


Production Well Apparatus for Underground Coal Gasification and Use Thereof
patent-application, June 2019


Locating Wellbore Flow Paths Behind Drill Pipe
patent-application, July 2018


Temperature Sensing Using Distributed Acoustic Sensing
patent-application, May 2015


Optical fiber sensing with enhanced backscattering
patent, April 2016


Forming openings in a hydrocarbon containing formation using magnetic tracking
patent-application, September 2003


Real-Time Flow Injection Monitoring Using Distributed Bragg Grating
patent-application, May 2015


Optical Fiber Distributed Sensors with Improved Dynamic Range
patent-application, August 2015


Downhole sensing with fiber in the formation
patent-application, March 2004


Inflatable Packer Internal Pressure Compensation Assembly
patent-application, August 2019


Fiber Optic Array Having Densely Spaced, Weak Reflectors
patent-application, January 2017


Method for analyzing strain data
patent, August 2013


Method of Measuring Acoustic Energy Impinging Upon a Cable
patent-application, September 2016


Multiple distributed pressure measurements
patent-application, September 2005


Downhole Fiber Optic Measurement of Packers During Fluid Injection Operations
patent-application, May 2017


Apparatus, Method and System for Mapping Fracture Features in Hydraulically Fractured Strata Using Functional Proppant Properties
patent-application, June 2013


Methods and Apparatus to Perform Stress Testing of Geological Formations
patent-application, August 2010