Advancements and Prospects of Monitoring and Intelligent PerceptionTechnology for Wellbore Sealing Integrity

A comprehensive knowledge of wellbore sealing integrity evolution information during the oil and gas well production is the foundation to ensure the safe and efficient development of oil and gas resources. Traditional logging technology can not meet the needs of monitoring the integrity of the wellbore throughout the whole life cycle, and it is imperative to realize the efficient integration of the wellbore, formation information perception, and digital technology. Therefore, with the in-situ perception technology of wellbore integrity as the main breakthrough, the investigation has been carried out in China and overseas in terms of acoustic monitoring, optical fiber sensing, self-sensing cement slurry, and permanent downhole testing equipment. Based on summarizing the advancements of wellbore sealing integrity monitoring and intelligent perception technology in China and abroad, the existing disadvangates and problems were analyzed. In addition, the development prospect was also made from four aspects: acoustic monitoring technology, distributed optical fiber sensing monitoring technology, intelligent cement slurry system, and permanent downhole testing equipment, so as to build a digital wellbore, accurately understand the dynamic information of the wellbore condition of oil and gas wells in real time, and promote the safe, efficient, and intelligent upgrading of oil and gas engineering .