A New Approach in Hydraulic Flow Unit Determination and its Application

for Prediction of Petrophysical Properties

By:Mohammad Izadi

Supervisor: Dr Ali Ghalambor

Contents:

1) Introduction

2) Literature Review

3) Approach

4) Scope of the work

Introduction:

A New Approach in Hydraulic Flow Hydraulic Flow UnitUnit Determination and its Application for Prediction

of Petrophysical PropertiesPetrophysical Properties

Introduction:

Definitions………

Reservoir Characterization

Rock Typing

Hydraulic Flow Unit

Reservoir Characterization

An integration of available data to define the geometrygeometry, distribution distribution of physical parameters and flow propertiesflow properties of a petroleum reservoir.

Available Data

Time

CumP

Rock Typing

Archie (1950):

Units of rock deposited under similar conditions which experienced similar diagenetic processes resulting in a unique porosity- permeability relationship, capillary pressure profile and water saturation for a given height above free water in a reservoir.

Rock type categories:

- Depositional:

Rock types according to similarities in compositions, texture, sedimentary structure and stratigraphic sequence as influenced by the depositional environment.

- Petrographic:

Rock types based on microscopic imaging of pore structure as well as texture and composition, clay mineralogy, and diagenesis.

- Hydraulic:

At pore scale level, those rock types according to the physical flow and storage properties of the rock relative to the native fluid as controlled by the dimensions, geometry and distribution of the current pore and pore throat structure.

Hydraulic Flow UnitHydraulic Flow Unit

Rock typing procedure:

Large scale Pore scale

1) Basin Analysis ( depositional environment, sand body geometry by core)

2) Physical core description to evaluate texture, composition, lithology and diagnosis

3) Routine and special core analysis to end up with pore and pore throat size

Hydraulic Flow Unit

Volume of the total reservoir rock within which geological and petrophysical properties that affect fluid flow are internally consistent.

Rock type

Literature Review

* Ebanks (1987) defined the fundamental conceptsof flow units

* Slatt and Hopkins (1990), Ahr (1991), and Stoudt et al. (1992) used qualitative techniques, to define flow units.

*Amaefule et al. (1993) did comparative studies and proposed a common method for determination of hydraulic flow units

Literature Review (Cont.)

* Gunter et al. (1997) reported Lorenz plot to define hydraulic flow units ( plot of percent flow capacity versus percent storage capacity of every stratigraphy sequence)

Many authors proposed different methods based on Amaefule model and concluded various results.

Approach

In this work, we propose a approach to hydraulic flow unit identification using common Amaefule method.

Amaefule or FZI method:

FZIRQI zφ=

Reservoir Quality Index

Normalized Porosity

Flow zone indicator

Approach (Cont.)

( )1

0.03141

e

e e s gv

k

F S

φφ φ τ

= −

RQINormalized Porosity

FZI

S gv : surface area per unit grain volume

sF τ : Kozeny term

Approach (Cont.)

How to get to the approach?

Mathematical Modeling:

It will be formulated according to Amaefule approach with Different Boundary Condition but same assumptions. In another word, a new term will be defined and mathematically obtained.

Scope of the work:

1)Mathematical Modeling ( Done)

2)Experiments ( Routine and Special Core Analysis)

3)Validating with experiments?

4) Up scaling with well log suite

Thank you

Questions???