Sand type | EF | RRT | Depositional facies | Diagenetic facies | Petrophysical characteristics |
Sub-tight sand | EF3 | 1 | Medium to coarse trace very coarse and granular quartzose channel sand | Compacted fabric, Quartz overgrowth and clay cemented framework | Highly porous, moderately low permeable, poor to fair intergranular porosity, poorly to moderately connected micro to dissolution meso pores |
EF5 | 2 | Medium to trace coarse and granular quartzose sand | Compacted fabric, clay and Q-overgrowth cemented framework | Moderately porous and moderately low permeable, poor to fair intergranular porosity, poorly to moderately connected micro to dissolution meso pores | |
SUB-tight to tight sand | EF4 | 3 | Medium to coarse quartzose to quartzo-feldspatic sand | Compacted fabric, Q-overgrowth and clay cemented framework | Low porous, moderately low permeable, poor-fair intergranular porosity, micro to isolated dissolution meso pores |
Tight sand | EF1 | 4 | Medium to coarse sand and some fine sand | Compacted fabric, Q-overgrowth and clay cemented framework | Moderately porous, low permeable, trace intergranular porosity, poorly connected micro to isolated meso pores |
EF6 | 5 | Medium to fine quartzose and quartzo-feldspatic sand | Compacted fabric, Q-overgrowth and clay cemented framework | Low porous, moderately low permeable, poorly connected micro pores | |
Very tight to tight sand | EF2 | 6 | Medium to some and coarse quartzose sand with some shale partings | Compacted fabric, Q-overgrowth and clay cemented framework | Moderately porous, low permeable trace intergranular porosity, poorly connected micro to some isolated meso-pores |
7 | Fine to medium grained mica rich sand | Highly compacted fabric, clay cemented framework | Low to moderately porous, low permeable, poorly connected pores | ||
8 | Medium to coarse grained sand | Compacted fabric, coarse calcite cemented framework | Low porous, low permeable, low connected micro pores |