Features and sealing capacity of each category | Features and sealing capacity of subcategories | |||||
---|---|---|---|---|---|---|
Types | Features | Sealing capacity | Sub-categories | Features | Sealing capacity | |
Porosity cap | argillaceous sedimentary, mainly through compaction, and without fractures or faults destruction | Overall good | High porosity | Porosity more than 23% | Good | Mostly good with some bad |
Medium porosity | Porosity from 20%-23% | Better | ||||
Low to Ultra-Low porosity | Porosity less than 20% | Best | ||||
Fracture transformation cap | destruction by fractures | Partial destruction | Fracture transformation cap | Worse in fractures | Good and bad | |
Fault transformation cap | destruction by faults | Large-scale destruction | plastic Fault transformation cap | Plastic compaction stage | Good | Mostly bad with some good |
elastoplastic fault transformation cap | Elastoplastic compression stage | Bad | ||||
rupture fault transformation cap | Ruputure stage | worst |