JAPEXにおける廃坑作業の事例と今後に向けた取り組み

抄録

JAPEX has variety types of abandoned wells. There are not only wells abandoned because of their well life, but also ones abandoned because they have too high pressure to keep well integrity at surface. In the other case, the well location has been gradually surrounded by residential land after long terms was passed since exploration. In addition, JAPEX has a case that the wellhead of its abandoned well was exposed by construction of third party at the previous well location already returned, and JAPEX recut the casing and set the well cap again. In this presentation, some well abandonment operations that have variety of restrictions, also future well abandonment plan and applications are introduced.