Study of hydraulic flow units using static modeling in upper Surmeh formation (Arab)‎ in one oil field in south of Iran

Abstract EN

This study investigated the spatial distribution of an oil field’s petrophysical parameters, including porosity and permeability, by determining and identifying the hydraulic flow units.

By identifying hydraulic flow units as well as rock types and investigating the distribution of porosity and permeability variables, good quality and suitable areas of reservoir could be classified.

Permeability relationships are noteworthy since they can be used to identify flow units for evaluation of reservoir quality.

Therefore, in the present study, using results from six wells from the upper Surmeh formation in the subject oilfield, a 3D static model of a reservoir was developed.

This was carried out after determining the Hydraulic Flow Units (HFU) by the probability diagram of the normal logarithm of Flow Zone Indicators (FZI) (based on the continuous variable of FZI).

The Sequential Index Simulation (SIS) method was used for model development.

As the result of this study and under the developed model, the probable distribution of these parameters for each cell in the reservoir were calculated, considering mean permeability and porosity.

Different areas in the field with respect to reservoir quality were also determined, even for areas in which there was no sufficient core data.

In summary, the HFU3 and HFU4 have the best reservoir quality, while the HFU1 and HFU5 have the lowest reservoir quality.

This is of the most important issues for reservoir optimum production planning.

The study provides deep understanding of how HFUs are spread.

In addition, the results of this study can be used for the development of a dynamic model.