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