Real-Time Monitoring of Piezoresistive Smart Cement To Verify Operations

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A 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 the hardening of the cement in place. A new method has been developed to measure the electrical resistivity of the materials with the two-probe method. Using the new concept, it has been proved that resistivity dominated the behavior of drilling fluid and smart cement.

Introduction

With reported failures and growing interest in environmental and economic concerns in the oil and gas industry, integrity of the cement sheath is of major importance. Oilwell cement serves many purposes in cemented oil and gas wells. Foremost among these is to form a sealing layer between the well casing and the geological formation.

In order to characterize the cement and cement concrete in various applications, electrical-resistivity measurement has been used by many researchers. Studies have also examined the piezoresistive behavior of modified cement-based and polymer composites. One conclusion is that the change in resistivity has the potential to be used to determine the integrity of the materials.

This article, written by Special Publications Editor Adam Wilson, contains highlights of paper OTC 27060, “Field Test for Real-Time Monitoring of Piezoresistive Smart Cement To Verify Cementing Operations,” by C. Vipulanandan, M. Ali, B. Basirat, A. Reddy, N. Amin, and A. Mohammed, University of Houston; S. Dighe, SPE, Baker Hughes; and H. Farzam, Cemex, prepared for the 2016 Offshore Technology Conference, Houston, 2–5 May. The paper has not been peer reviewed. Copyright 2016 Offshore Technology Conference. Reproduced by permission.
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Real-Time Monitoring of Piezoresistive Smart Cement To Verify Operations

01 May 2017

Volume: 69 | Issue: 5

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