Abstract
About 20 years have been passed since Yufutsu Oil & Gas Field was discovered in 1988. After the first stage development until 1997, total 11 wells were drilled and Yufutsu Field has been producing oil and gas, due to several problematic producers and continuous rise of local demand for natural gas, however, JAPEX resumed the second stage development from the well “Numanohata SK-6D” in 2005 and total 6 wells have been drilled so far.
At the first development stage, JAPEX encountered numbers of difficulties arising from formation properties, pressure and reservoir characteristics and overcame some, however there has been still existing some of these difficulties. At the second stage development, from new standpoint of well integrity which focuses on total well life and much stricter well conditions, cutting edge technologies and concepts have been applied in order to conquer these remaining difficulties and eventually achieved considerable results that include not only drilling but also both G & G and production phases.
This paper addresses the basic direction of these achievements and further concerns for the development of the field.
