Types | Depth(m) | Features | Sealing capacity |
---|---|---|---|
Class I | <1000 | high porosity, plastic fault transformation cap combination zone | Good |
Class II | 1000-2000 | medium porosity, elastoplastic fault transformation cap combination zone | Better, locally worse |
Class III | >2000 | low to ultra-low porosity, fracture transformation cap to rupture fault transformation cap combination zone | Good or bad |