Session: 11-04-03 Well Cementing Theory & Practice

Paper Number: 125850

125850 - A Comprehensive Review of Co2 Corrosion in Oil Well Cement: Mechanisms, Determinants, and Mitigation Strategies 

Abstract

Carbon capture, utilization and storage (CCUS) is the main technical for carbon neutrality. This emerging technology has been developed to capture CO₂ and store them in underground formations, such as aquifers or depleted gas or oil reservoirs. The corrosion of oil well cement by CO₂ is a significant challenge which this technology faces. CO₂ dissolves in the formation liquid phase to form an acidic fluid that interacts with various components in oil well G cement. As the corrosion progresses, the cement's mechanical integrity diminishes, permeability escalates, and overall properties degrade. Factors like temperature, pressure, and the inherent properties of the cement significantly influence this reaction process. Over recent years, numerous investigations have delved into the CO₂-cement interaction, leading to the innovation of myriad techniques aimed at mitigating this concern. Employing oil well cement, distinguished by its diminished porosity, decreased permeability, and attenuated alkalinity, represents a globally recognized strategy for augmenting CO₂ corrosion resistance. Pozzolanic substances and film-forming barrier materials are extensively documented in literature as CO₂-resistance potent agents. This paper offers a review of previous research works, encompassing the corrosion mechanism of oil well cement by CO₂, various factors affecting CO₂ corrosion, and CO₂-resistant cement techniques.

Presenting Author: Feng Zhao China University of Petroleum (East China)

Presenting Author Biography: The author is a PhD candidate at China University of Petroleum (East China), majoring in petroleum engineering. The author also graduated from this university with his undergraduate degree. During his master's degree, he studied chemical engineering at the University of Queensland, Australia. In the past two years, the author has conducted a large number of research and experiments on the intersection of carbon neutrality and petroleum engineering. The author hope to have the opportunity to attend this OMAE conference and have rare exchanges with experts and scholars in the industry.

Authors:

Feng Zhao China University of Petroleum (East China)
Chengwen Wang Chian University of Petroleum(East China), School of petroleum Engineering
Dingye Li University of New South Wales
Zehua Chen School of petroleum Engineering, Chian University of Petroleum(East China)