RESEARCH ARTICLE


Kinetic Models of Integrated Solidification and Cementation of Cementformation Interface with New Method



Jun Gu*, Pei Zhong, Wenzheng Qin, Haoya Liu, Lifei Dong, Yijun Yang
Petroleum Engineering Department, Faculty of Earth Resources, China University of Geosciences; No. 388, Lumo Road, Wuhan, Postcard: 430074 China


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© 2017 Gu et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Petroleum Engineering Department, Faculty of Earth Resources, China University of Geosciences; No. 388, Lumo Road, Wuhan, Postcard: 430074 China; Tel: +86-27-6784-8569; Fax: +86-27-6788-3051; E-mail: gujun2199@126.com


Abstract

The isolation failure of cement-formation interface is an important and urgent problem in oil production, while an effective way to solve it is to realize the integrated solidification and cementation of cement-formation interface (ISCCFI). In order to study the kinetics of ISCCFI with MTA (Mud Cake to Agglomerated Cake) method, the Diamond Differential Scanning Calorimetry Analyzer is adopted for experiments with dynamic method and isothermal method. The results show that there is a linear relationship between the solidification reaction temperature and the heating rate of ISCCFI with MTA method. For the first exothermic peak, the initial temperature, peak tip temperature and final temperature are 53 °C, 69 °C and 83 °C respectively, and the apparent activation energy of solidification reaction is 44.39×10-3 kJ.;mol-1, the natural logarithm of preexponential factor is 7.26, the solidification reaction order is 0.88. For the second exothermic peak, the initial temperature, peak tip temperature and final temperature are 83 °C, 92 °C and 114 °C respectively, and the apparent activation energy of solidification reaction is 99.14×10-3 kJ.;mol-1, the natural logarithm of preexponential factor is 24.77, the solidification reaction order is 0.94. The maximum solidification reaction rates at 50 °C, 75 °C and 90 °C are 0.09×10-3 s-1, 0.27×10-3 s-1 and 0.51×10-3 s-1 respectively. The kinetic models of ISCCFI with MTA method under different temperatures are established. It provides a theoretical and technical support for the isolation improvement of cement-formation interface.

Keywords: Kinetic model, Fluid channeling, Cement-formation interface, MTA method.