Cement properties with embedded sensors for wellbore integrity monitoring

Patricia Cvetic; Ruishu Wright; Richard Spaulding; Johnathan Moore; Dustin Crandall; Paul DiCarmine; Aydin Babakhani; Paul Ohodnicki

doi:10.1117/12.2557318

28 May 2020 Cement properties with embedded sensors for wellbore integrity monitoring

Patricia Cvetic, Ruishu Wright, Richard Spaulding, Johnathan Moore, Dustin Crandall, Paul DiCarmine, Aydin Babakhani, Paul Ohodnicki

Author Affiliations +

Proceedings Volume 11382, Smart Structures and NDE for Industry 4.0, Smart Cities, and Energy Systems; 1138208 (2020) https://doi.org/10.1117/12.2557318
Event: SPIE Smart Structures + Nondestructive Evaluation, 2020, Online Only

Abstract

There is a need for embedded sensor technologies to monitor wellbore integrity in real-time for carbon storage and geothermal applications. Emerging sensing technologies such as optical fiber sensors and wireless sensors have been studied for physical parameter monitoring (e.g. temperature, vibration, and strain) and chemical parameter monitoring (e.g. pH, CO₂, corrosion) to monitor structural health of the wellbore. The desirable sensors need to be able to withstand the harsh environments relevant for carbon storage and geothermal wellbores, and they must not inadvertently cause potential sources of wellbore failures. Therefore, we investigated the cement properties with embedded sensors to compare with baseline cement properties, including porosity, permeability, mechanical properties (e.g. Young’s modulus, Poisson’s Ratio, etc), and 3D computed tomography (CT) scans. The sensor devices (optical fiber sensors [OFS] and wireless chip sensors) were embedded in cement cores under wellbore relevant conditions. Then, the cement samples were examined using AutoLab 1500, nitrogen permeability testing, helium porosity testing, and 3D CT scanners. Results show that the cement samples with embedded sensor devices had a slight increase in porosity of 1.5% to 3.6% compared to the blank cement samples. Permeability slightly increased by 0.001 mD with embedded chip sensors. The embedded chip sensors did not significantly change the cement mechanical properties; whereas, the embedded OFS prototypes improved the cement mechanical strengths, e.g. increasing the Young’s modulus by as much as 10% and the bulk modulus by up to 25.5%. CT scans confirmed the proper embedding and good bonding between sensor devices and cement.

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Patricia Cvetic, Ruishu Wright, Richard Spaulding, Johnathan Moore, Dustin Crandall, Paul DiCarmine, Aydin Babakhani, and Paul Ohodnicki "Cement properties with embedded sensors for wellbore integrity monitoring", Proc. SPIE 11382, Smart Structures and NDE for Industry 4.0, Smart Cities, and Energy Systems, 1138208 (28 May 2020); https://doi.org/10.1117/12.2557318

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KEYWORDS

Cements

Sensors

Prototyping

Computed tomography

Optical fibers

Fiber optics sensors

3D scanning

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