IDENTIFICATION OF POROSITY AND

PERMEABILITY FOR THE CORE PLUGS

By Mohd Abdul Hakeem

11H11A2726Al Habeeb College Of Engineering and

Technology

INTRODUCTION Porosity

Permeabilty

Core plugs

Identification of porosity by helium Porosimeter

Identification of permeability by gas Permeameter

OBJECTIVE

To determine the porosity and permeability of the core plugs

POROSITY

It is defined as the ratio of pore volume to bulk volume of a rock sample.

Porosity is one of the most important rock properties in describing porous media.

The porosity is defined as the capability of a rock to hold fluids in pores.

TRADITIONAL VIEW OF POROSITY IN E&P INDUSTRY 0-5% Negligible

5-10% Poor

10-15% Fair

15-20% Good

20-25% Very Good

PERMEABILITY Permeability of a rock is defined as the ease

with which the fluid can flow. Permeability with one fluid in pore is called

“Absolute permeability” With more then one fluid is called “Effective

permeability” “Relative permeability” is the ratio of

effective permeability and absolute permeability.

It is denoted by ‘K’ Permeability can be calculated by milli

Darcy

TRADITIONAL VIEW OF PERMEABILTY

Poor 1-10 mD

Fair 10-100 mD

Good 100-1000 mD

Excellent >1000 mD

CORE PLUGS & INSTRUMENTS USED

HELIUM POROSIMETER

PROCEDURE TO DETERMINE POROSITY

GAS PERMEAMETER (AUTOMATED)

PROCEDURE TO DETERMINE PERMEABILITY

CORRELATION OF POROSITY AND PERMEABILTY

RESULT

By correlating Porosity and Permeability of the core samples, we get to know the lithology of the formation.

Thank you