The Hirai onshore gas field in Japan was selected for CO2 storage. Its highly depleted condition after historical hydrocarbon production and its highly heterogeneous quality posed technical challenges for the completion work of wells in the field. This paper presents a case study of oriented tubing-conveyed perforation (TCP) followed by acidizing operations.
Introduction
A blue hydrogen and ammonia production and usage demonstration project in Kashiwazaki is the first example in Japan of implementing an integrated process from production to the utilization of hydrogen and ammonia. The natural gas produced from the Minami-Nagaoka gas field will be used as feed gas, and CO2 emitted during hydrogen-plant production will be injected into the Hirai gas field.
Gas production from the Hirai field began in 1970, ceasing in 2014 because of depletion of reservoir pressure and the encroachment of water into production wells.
