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# Casing/cementing/zonal isolation

The authors describe a study in which leakage-rate modeling was performed to identify and evaluate the associated risks for designing a remedial action plan to safeguard a CO2 storage site.
The authors write that polymeric additives are effective in the design of complex systems to house important chemical reagents under challenging conditions.
This paper examines current practices and developing trends in well construction and describes an alternative cementless approach to the discipline.

• The oilfield services company's Tubular Running Service was recognized for reducing costs, maximizing safety.
• The cementing services market size in the US is expected to drop 50% year-on-year from 2019. The significant drop in Permian Basin activity will account for 40% of the total market size reduction.
• The complete paper presents a case study in which offline cementing improved operational efficiency by reducing drilling times and provided significant cost savings.
• This study used ultrasonic logging to evaluate reference barrier cells constructed with known defects. The cell concept was developed with an emphasis on low cost and ease of use.
• In the complete paper, a novel system that uses engineered features of permeable polymeric shell walls for the controlled release of encapsulated cargo is described.
• This year, excellent papers have been presented, augmenting our knowledge and responding to the challenges of complex wells and efficiency requirements. At the same time as we “Strengthen the Core,” we continue to focus on design, delivery, and evaluation of cementing operations.
This article highlights a technology that helped one operator add $120,000 to its incremental gas recovery. • This paper describes a high-pressure/high-temperature (HP/HT) expandable liner hanger product that offers metal-to-metal and elastomer sealing capabilities at the liner top in the host casing. • Sponsored Running casing to depth in long lateral sections is challenging, often costing operators a significant portion of pay zone at the toe of the well. This article highlights a technology that helped one operator add$120,000 to its incremental gas recovery.