# US 2015/0144331 A1 · Systems and Methods for Real-Time Evaluation of Coiled Tubing Matrix Acidizing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0144331 A1 - Document ID: US20150144331A1 - Status: Published application - Kind: A1 - Application number: 14/088,966 - Filed: 2013-11-25 - Published: 2015-05-28 - Earliest claimed: 2013-11-25 - Assignees: Baker Hughes Incorporated - Applicants: Baker Hughes Incorporated - Inventors: Silviu Livescu; Trevor A. Sturgeon; Thomas J. Watkins - Web page: https://patentgrep.com/patent/US20150144331A1 ## CPC - E21B 47/07: Temperature - E21B 43/25: Methods for stimulating production {(by vibrating earth formations E21B43/003)} - E21B 43/27: by use of eroding chemicals, e.g. acids - E21B 47/01: Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like - E21B 47/06: Measuring temperature or pressure - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract A matrix acidizing monitoring system wherein a sensor array is operably associated with a matrix acidizing bottom hole assembly and contains first and second sets of sensors that detect a matrix acidizing operational parameter at different times at one or more particular locations along the wellbore. This allows the effectiveness of the acidizing to be modeled. ## Claims ### Claim 1 A matrix acidizing monitoring system comprising: a bottom hole assembly to conduct matrix acidizing in a wellbore; a sensor array operably associated with the bottom hole assembly and having first and second sets of sensors, each of the first and second sets of sensors being operable to detect a matrix acidizing operational parameter at a location in the wellbore; the first set of sensors detecting the parameter at the location at a first time as the first set of sensors is moved past the location; and the second set of sensors detecting the parameter at the location at a second time as the second set of sensors is moved past the location. ### Claim 2 (depends on 1) The matrix acidizing monitoring system of claim 1 wherein at least one of the sensors in the sensor array comprises a transducer for sensing temperature and/or pressure. ### Claim 3 (depends on 1) The matrix acidizing monitoring system of claim 1 further comprising a signal processor operably interconnected with the sensor array to compare the parameter detected by the first set of sensors to the parameter detected by the second set of sensors. ### Claim 4 (depends on 1) The matrix acidizing monitoring system of claim 1 wherein the first set of sensors and the second set of sensors are disposed upon the bottom hole assembly. ### Claim 5 (depends on 4) The matrix acidizing monitoring system of claim 4 wherein the first and second sets of sensors are axially spaced apart from each other upon the bottom hole assembly. ### Claim 6 (depends on 1) The matrix acidizing monitoring system of claim 1 wherein the bottom hole assembly is moved within the wellbore from a first position wherein the first set of sensors detects the parameter to a second position wherein the second set of sensors detects the parameter. ### Claim 7 (depends on 3) The matrix acidizing monitoring system of claim 3 further comprising a conductor to conduct signals from the sensor array to the signal processor. ### Claim 8 (depends on 1) The matrix acidizing monitoring system of claim 1 wherein the matrix acidizing operational parameter comprises temperature and/or pressure. ### Claim 9 A matrix acidizing monitoring system comprising: a bottom hole assembly to conduct matrix acidizing in a wellbore; a sensor array operably associated with the bottom hole assembly and having first and second sets of sensors, each of the first and second sets of sensors being operable to detect a matrix acidizing operational parameter at a location in the wellbore; the first set of sensors detecting the parameter at the location at a first time as the first set of sensors is moved past the location; the second set of sensors detecting the parameter at the location at a second time as the second set of sensors is moved past the location; and processing equipment to receive signals from the sensors representative of the detected parameters and to compare the parameter detected by the first set of sensors to the parameter detected by the second set of sensors. ### Claim 10 (depends on 9) The matrix acidizing monitoring system of claim 9 wherein at least one of the sensors in the sensor array comprises a transducer for sensing temperature and/or pressure. ### Claim 11 (depends on 9) The matrix acidizing monitoring system of claim 9 wherein the first set of sensors and the second set of sensors are disposed upon the bottom hole assembly. ### Claim 12 (depends on 11) The matrix acidizing monitoring system of claim 11 wherein the first and second sets of sensors are axially spaced apart from each other upon the bottom hole assembly. ### Claim 13 (depends on 12) The matrix acidizing monitoring system of claim 12 wherein the bottom hole assembly is moved within the wellbore from a first position wherein the first set of sensors detects the parameter to a second position wherein the second set of sensors detects the parameter. ### Claim 14 (depends on 9) The matrix acidizing monitoring system of claim 9 further comprising a conductor to conduct signals from the sensor array to the signal processor. ### Claim 15 (depends on 1) The matrix acidizing monitoring system of claim 1 wherein the matrix acidizing operational parameter comprises temperature and/or pressure. ### Claim 16 A method of monitoring a matrix acidizing operation within a subterranean formation in a wellbore, the method comprising: disposing a bottom hole assembly proximate the formation in the wellbore; conducting a matrix acidizing operation through the bottom hole assembly into the formation; detecting a matrix acidizing operational parameter at a location within the wellbore with a first set of sensors as the first set of sensors is moved past the location; detecting the matrix acidizing operational parameter at the location with a second set of sensors as the second set of sensors is moved past the location; and comparing the parameter detected by the first set of sensors to the parameter detected by the second set of sensors. ### Claim 17 (depends on 16) The method of claim 16 wherein the first and second sets of sensors are axially spaced apart from one another upon the bottom hole assembly and wherein: the bottom hole assembly is moved within the wellbore from a first position wherein the first set of sensors detects the parameter to a second position wherein the second set of sensors detects the parameter. ### Claim 18 (depends on 16) The method of claim 16 wherein the first and second sets of sensors detect the operational parameter at multiple points along the wellbore.