Smart cement modified with iron oxide nanoparticles to enhance the piezoresistive behavior and compressive strength for oil well applications

Vipulanandan, C.; Mohammed, Ahmed Salih

doi:10.1088/0964-1726/24/12/125020

Cited by 116 publications

(22 citation statements)

References 23 publications

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“…The failure compressive strain for the smart cement was 0.2% at peak compressive stress (Vipulanandan et al 2015b) and hence the resistivity change was 350 to 800 times more sentive. The bottom and middle level samples were cured under water and the top level sample was cured udner room condtion (23°C and reative humidity of 50%).…”

Section: Resultsmentioning

confidence: 97%

“…The failure compressive strain for the smart cement was 0.2% at peak compressive stress (Vipulanandan et al 2015b) and the resistivity change is of the order of several hundreds making it over 500 times more sensitive. The smart cement can sense the changes in the water cement ratio, different additives, and any pressure applied to the cement sheath in terms of piezoresistivity (Vipulanandan and Mohammed 2015a).…”

Section: Smart Oil Well Cementmentioning

confidence: 99%

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Field Test for Real Time Monitoring of Piezoresistive Smart Cement to Verify the Cementing Operations

Vipulanandan

Ali

Basirat

et al. 2016

Day 1 Mon, May 02, 2016

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In this study, a field well was installed and cemented using the smart cement mixture with enhanced piezoresistive properties. The field well was designed, built, and used to demonstrate the concept of real time monitoring of the flow of drilling mud and smart cement and hardening of the cement in place. The well was installed in soft swelling clay soils to investigate the sensitivity of the smart oil well cement. A new method has been developed to measure the electrical resistivity of the materials using the two probe method. Using the new concept, it has been proven that the resistivity dominated the behavior of drilling fluid and smart cement. LCR meters (measures the inductance (L), capacitance (C) and resistance (R)) were used at 300 kHz frequency to measure the changes in resistance. The well instrumentation was outside the casing with 120 probes, 18 strain gages and 9 thermocouples. The strain gages and thermocouples were used to compare the sensitivity of these instruments to the two probe resistance measure in-situ in the cement. The electric probes used to measure the resistance were placed vertically at 15 levels and each level had eight horizontal probes.Change in the resistance of hardening cement was continuously monitored since the installation of the field well for over 100 days. Also, a method to predict the changes in electrical resistance of the hardening cement outside the casing (Electrical Resistance Model -ERM) with time has been developed. The ERM predicted the changes in the electrical resistances of the hardening cement outside the cemented casing very well. In addition, the pressure testing showed the piezoresistive response of the hardened smart cement and a piezoresistive model has been developed to predict the pressure in the casing from the change in resistivity in the smart cement.

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Section: Resultsmentioning

confidence: 97%

Section: Smart Oil Well Cementmentioning

confidence: 99%

Field Test for Real Time Monitoring of Piezoresistive Smart Cement to Verify the Cementing Operations

Vipulanandan

Ali

Basirat

et al. 2016

Day 1 Mon, May 02, 2016

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“…e compressive strength of cement paste represents the ability to maintain the integrity of cement paste under compressive stress, which is one of the most important evaluation criterion for cementing. It also reflects the maximum stress of cement paste destroyed by uniform velocity compressive stress on the contact surface of a unit [23]. e flexural strength stands for the ability of cement stone to withstand external shear which indirectly characterizes the toughness of cement [24].…”

Section: Effect Of Latex Powder Content On Mechanicalmentioning

confidence: 99%

Synergistic Effect of Latex Powder and Rubber on the Properties of Oil Well Cement‐Based Composites

Song

Liu

et al. 2018

Advances in Materials Science and Engineering

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e brittleness and the poor resistance to external load of oil well cement impede the development of oil and gas wells. To overcome these deficiencies, latex powder or rubber and their hybrid combinations were used to modify the oil well cement. e conventional properties, mechanical properties, and scanning electron microscopy (SEM) images of the modified cement were analyzed. In comparison with latex powder-incorporated cement and rubber-incorporated cement, a significant improvement of fluid loss, flexural strength, impact strength, and elasticity of the cement slurry was observed when using the hybrid combinations of 3 wt.% latex powder and 2 wt.% rubber, although this synergistic effect was not remarkable on the compressive strength and the thickening time. ese evidences arose from the synergism between latex powder and rubber leading to the formation of a threedimensional network structure and a flexible structure which subsequently improved the elasticity and toughness of cement stone. e improved elastic matrix has a buffering effect on external impact when the cement stone is subjected to an external load.

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“…e significant improvements in the compressive and split tensile strengths of cement mortar due to the incorporation of fly ash were observed [26,27]. e stress-strain behavior of materials such as concrete, glass fiber-reinforced polymer concrete, fine sands grouted with sodium silicate, sulfate-contaminated clay soil, smart cement modified with nanomaterials, and cement mortar were predicted using the Vipulanandan model [28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Characterizing and Modeling the Mechanical Properties of the Cement Mortar Modified with Fly Ash for Various Water‐to‐Cement Ratios and Curing Times

Qadir

Ghafor

Mohammed

2019

Advances in Civil Engineering

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Despite many research studies on the effect of the fly ash content (FA) on the mechanical behavior of the cement mortar, there has not been an extensive study investigating the effect of FA, curing time (t), and water-to-cement ratio (w/c) on the compressive (σc), tensile (σt), and flexural (σf) strengths of cement mortar. Therefore, this study investigates the subject which could be beneficial for the building and construction field. In this study, more than 1000 data on the mechanical properties of the cement mortar modified with different percentages of fly ash varying from 5% to 75% (by dry weight of the cement) were collected from the literature. The statistical analysis and modeling were performed on the collected data. The w/c of the cement mortar ranged from 0.20% to 0.80%, and the compressive, split tensile, and flexural strengths of cement mortar modified with fly ash and cured up to 90 days ranged from 15 MPa to 88 MPa, 0.4 MPa to 5 MPa, and 1 MPa to 10 MPa, respectively. The Vipulanandan model was also used and compared with the Hoek–Brown model to correlate the mechanical properties of cement mortar modified with fly ash. The results of this study showed that there is a good relationship between the compressive strength (σc) and w/c, curing time, and fly ash content. The compressive, split tensile, and flexural strengths of cement mortar quantified well as a function of w/c, fly ash content, and curing time using a nonlinear relationship.

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Smart cement modified with iron oxide nanoparticles to enhance the piezoresistive behavior and compressive strength for oil well applications

Cited by 116 publications

References 23 publications

Field Test for Real Time Monitoring of Piezoresistive Smart Cement to Verify the Cementing Operations

Field Test for Real Time Monitoring of Piezoresistive Smart Cement to Verify the Cementing Operations

Synergistic Effect of Latex Powder and Rubber on the Properties of Oil Well Cement‐Based Composites

Characterizing and Modeling the Mechanical Properties of the Cement Mortar Modified with Fly Ash for Various Water‐to‐Cement Ratios and Curing Times

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