Javier UrdanetaJuan Manuel ArroyavePaul JonesJorge AmayaA. CoralHernán Hernández Herrera2026-03-222026-03-22201410.2118/169400-mshttps://doi.org/10.2118/169400-mshttps://andeanlibrary.org/handle/123456789/45948Citaciones: 11Abstract Recent studies have shown an increase in the percent of wells affected by sustained casing pressure over time. Both the oil and gas industry and governments are studying the causes of sustained casing pressure and methods to help prevent undesired flow that can potentially result in the loss of wellbore integrity and environmental problems. In the Caribbean region in northern Colombia, various natural gas production fields have been developed for decades. Because of mechanical problems or low economic return rates, some producing gas wells have been abandoned. Some wells in this area have been abandoned using conventional cement techniques without success, sometimes resulting in gas communication through the annulus to the surface. This has even been observed in some cases where the primary top of cement (TOC) was planned to surface. Potential gas communication through the wellbore annulus has been an issue in the industry for a long time. There are several factors influencing gas communication, such as flow through mud channels, micro-annuli, and flow through unset cement, among others. This paper presents the successful application of a new resin with superior mechanical properties and solids content designed according to the needs of the well, which allow it to penetrate areas previously inaccessible to conventional cement slurry, such as small fractures, channels, or micro-annuli. The case study presented shows how a sustained casing pressure problem was caused by a channel in the primary cement job. The novel resin system was pumped successfully as a squeeze job ahead of neat cement slurry to isolate the gas-producing formation, and no further gas production was observed at surface, bringing the well back into compliance with government regulations for proper well abandonment.enCasingAnnulus (botany)Petroleum engineeringCementWellboreCompletion (oil and gas wells)SlurryNatural gasEnvironmental scienceAbandonment (legal)article