Table 1 The flow capacity classification ranks based on the ISML technique of Nabawy (2021)28.

From: Applying the improved stratigraphic modified Lorenz technique for dividing the highly heterogeneous clastic reservoirs into hydraulic flow units

Graphical method

Slop angle (θ)

Description

Statistical method

Tanθ

Efficiency rank

Barrier

Tan θ < 0.017

Tight

1°–5°

Semi-barrier

0.017–0.087

5°–15°

Baffle

0.087–0.268

15°–30°

Semi-conductor

0.268–0.577

Poor

30°–60°

Conductor

0.577–1.732

Fair

60°–75°

Super conductive

1.732–3.732

Good

75°–85°

Fractured

3.732–11.43

Very good

85°–90°

Highly fractured

Tan θ > 11.43

Excellent