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FORMATION FLUID IDENTIFICATION & SATURATION-HEIGHT FUNCTION for PETROPHYSICISTS

Featuring 20 Actual Log Examples for Formation Fluid Identifications and Saturation-Height Function Calculations

A premium professional technical reference specifically developed for petrophysicists, reservoir engineers, geologists, geomodels and subsurface professionals involved in formation fluid interpretation and saturation-height function modelling.

20 Actual Field Log Examples
Pressure-Depth Analysis Techniques
Formation Fluid Identification Using Log Signatures
Practical Interpretation Workflows
Saturation-Height Function Methodology

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FORMATION FLUID IDENTIFICATION & SATURATION-HEIGHT FUNCTION for PETROPHYSICISTS

Industry Endorsement

“In an era where petrophysical interpretation is increasingly driven by sophisticated software and automated workflows, this book serves as a timely and important reminder of the enduring value of first principles. In my view, this is an essential read for anyone involved in petrophysics, reservoir characterization, and 3D reservoir modelling. It not only enhances technical understanding but also reinforces the disciplined, critical thinking required to deliver reliable subsurface evaluations.”

— THANAPALA SINGAM MURUGESU

Petrophysics Custodian, PETRONAS

20 Actual Field Log Examples

From actual reservoir evaluations across diverse geological settings

Pressure-Depth Analysis Techniques

Practical approaches to pressure analysis and fluid gradient interpretation

Formation Fluid Identification Using Log Signatures

Water, oil, gas and mixed-fluid case interpretations with real examples

Practical Interpretation Workflows

Step-by-step methodologies used in real industry applications

Saturation-Height Function Methodology

Robust methodologies for 3D geomodel input and reservoir characterization

Why This Book Is Different

This book bridges theory and practice of formation fluid identification using basic log signatures with actual field log examples, which is unfortunately not readily available in the literature.

A simplified but yet robust saturation-height function (SHF) methodology using hydraulic flow unit principle is explained in detailed. This allows SHF works to be done in a very short time and the results can be used as inputs in 3D geomodels even in the absence of core data.

This technical reference contains:

20 Actual Field Log Examples: Include clastic and carbonate reservoirs.
Pressure-Depth Analysis Techniques: Determines formation fluid types, fluid contacts and pressure systems.
Formation Fluid Identification Using Log Signatures: Uses principles of basic logging tools in understanding log responses to different formation fluid types.
Practical Interpretation Workflows: Detailed step-by-step explanations to interpret formation fluid type based on log signatures, mud log, pressure data, downhole sample and production test.
Saturation-Height Function Methodology: Simple but yet robust methodology using hydraulic flow unit principle that is applicable in most reservoirs with minimal modifications.

The contents are designed for readers to understand the finer aspects of practices in petrophysics especially in identifying fluid types using log signatures, interpretation of formation pressures and saturation-height function works.

What You Will Learn

Principles of basic logging tools (SP, GR, density, neutron, sonic, resistivity, nuclear magnetic resonance and formation pressure tools)
Log signatures for formation fluid identification
Limestone and sandstone compatible scales for log display
Pressure-depth plot analysis
Pressure gradients of different formation fluid types and formation water salinity
Understand and identify different fluid pressure systems
Capillary pressure and fluid distribution
Rock typing and SHF generation of water saturation using hydraulic flow unit principle
Predict free-water-level and permeability using SHF in the absence of core data

Who This Book Is For

Petrophysicists
Reservoir Engineers
Geologists
Geomodellers
Oil & Gas Technical Professionals
Petroleum Engineering and Geoscience Students

About The Author

Zarool Hassan bin Tajul Amar

Zarool Hassan Bin Tajul Amar is a petrophysicist and trainer with extensive experience in wireline and logging-while-drilling (LWD) operations, reservoir characterization, and saturation-height function development. His professional experience spans oil and gas fields across the Middle East, Southeast Asia, and Africa.

Throughout his career, he has worked within multidisciplinary teams, integrating petrophysical, geological, and reservoir engineering data to support reservoir evaluation and optimize hydrocarbon recovery. His expertise includes formation evaluation, fluid identification, formation pressure interpretation, and saturation modelling.

The methodologies presented in this book are founded on practical field experience and grounded in the fundamental physics of well-logging measurements. They reflect a pragmatic approach to petrophysical interpretation developed through years of operational and technical application in diverse reservoir environments.

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RM 1,124

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A specialised technical reference featuring 20 actual field log examples and practical interpretation methodologies rarely disclosed publicly.

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