STAG

Training

Course Dates
FE1: Basic Log Interpretation
G2: Operations and Wellsite Geologist
WO1: Introduction to Drilling & Wellsite Geology
P1: Formation Pressure Evaluation
WPFT1: Geological Control on Drilling Performance
C1: Best Practice in Core Handling & Analysis

Currently our classroom courses are suspended because of Coronavirus.

However, we are able to offer online video-conferencing access to our programmes using Skype for Business, Microsoft Teams or other suitable meeting apps. Individuals or small groups can be accommodated and course materials/manuals can be downloaded from our website. Fees will be adjusted accordingly. Please contact Martin Saunders for more details at:

martin.saunders@stag-geological.com

Click here to download our 2021 Training Brochure

Date	Duration	Title	Location
15-Mar-2021	5 Days	WO1: Introduction to Drilling & Wellsite Geology	Reading	Book Now
22-Mar-2021	3 Days	FE1: Basic Log Interpretation	Reading	Book Now
12-Apr-2021	4 Days	G2: Operations & Wellsite Geologist	Reading	Book Now
26-Apr-2021	3 Days	P1: Formation Pressure Evaluation	Reading	Book Now
10-May-2021	5 Days	WO1: Introduction to Drilling & Wellsite Geology	Reading	Book Now

FE1: Basic Log Interpretation

Target Audience

Wellsite Geologists
Operations Geologists
Mud Loggers
MWD Operators
Directional Drillers
Technical & Support Staff

Course Aims

To provide an overview of Quick-Look Interpretation from traditional open-hole wireline and LWD logs.

This practical course uses worked examples and a final Case Study to allow students to practise and become familiar with basic geological and reservoir evaluation techniques.

Delegates will learn:

About the reasons for geophysical logging and information required
About the basic theory of operation of traditional open hole logging tools
How to interpret lithology from well logs
How to identify reservoir rocks and the location and type of fluids present
How to determine Porosity from Sonic, Density and Neutron Porosity tools and make simple corrections for lithology, shaliness and gas effects
How to identify hydrocarbon bearing zones and calculate water saturation using the basic Archie Formula while making corrections for environmental effects
About the differences between Wireline and LWD tools

Course Length

3 Days

Course Fee

£1500 (+VAT)

FE1: Course Outline

Obtaining Well Logs

The Nature of Well logs
Conveyance Methods
Borehole Environment
Invasion
Log Scales and Presentation

Theory of Operation

Gamma Ray
Resistivity
Neutron Porosity
Density
Sonic

Log Interpretation

Log QC
Lithology Determination

Gamma Ray and S.P.
Density/Neutron
Crossplots

Facies and Environments

Reservoir Evaluation

Recognition of Permeability
Identification of Hydrocarbons
Fluid types & contacts
Porosity and Permeability Determination
Water Saturation (Sw) estimation

Wireline Logs: Basic Concepts

Types of Open Hole Logs
Information Required
Log Header
Relationships
Borehole Environment
Invasion Profiles
Rw & Rmf
Porosity and Permeability
Resistivity and Water Saturation
Temperature Corrections

Theory of Operation

Spontaneous Potential
Gamma Ray
Resistivity Logs

Laterologs
Induction Logs
Microresistivity Logs

Neutron Porosity
Sonic
Formation Density
Dipmeter Tools

MWD & LWD Logging

Theory of Operation
Transmission Systems
Tool Configuration
Sensors
Operating Procedures and Practice
MWD/Wireline Response Comparison

Geological Interpretation

Log QC Procedures
Identification of Lithology
Environment and Facies
Identification of Permeability
Identification of Porosity
Geosteering Applications

Reservoir Evaluation

Quick Look Porosity Calculations
Identification of Hydrocarbon Bearing Zones
Hydrocarbon Type Evaluation

Saturation Calculations

Archie
Shaly sands
Carbonates
Resistivity Ratio
Cross-Plots

G2: Operations and Wellsite Geologist

Target Audience

Wellsite Geologists
Operations Geologists
Mud Loggers
MWD Operators
Directional Drillers
Technical & Support Staff

Course Aims

To provide an overview of the role of Operations and Wellsite Geologists in Well Planning and Drilling Surveillance phases.

To provide practical instruction in wellsite geological techniques and geosteering co-ordination.

Delegates will learn how to:

Describe & Evaluate drill cuttings
Produce a Formation Pressure Profile to include estimated pore pressure and fracture gradient data
Determine Lithology and Reservoir information from well logs
Use Mudlogging and MWD data to perform real-time geosteering co-ordination.

Course Length

4 Days

Course Fee

£1950 (+VAT)

G2: Course Outline

Operations Geology Overview

Well Planning Processes

G&G Chapter of Drilling Programme
Geology & Stratigraphy
Pressure Profile
Site Survey & Shallow Gas
Geological Hazards

Data Acquisition Procedures

Provision of Wellsite Services
Identification & Selection
Logging Programmes

Data Management & Distribution

Technical Support

Wellsite Geology

Supervision of Wellsite Services
Mudlogging Services

Mudlogging Units
Sensors
Data Acquisition
Gas Detection
Sampling and Cuttings Evaluation
Depth and ROP
Coring Services
Conventional
Sidewall
Coring Procedures
Retrieval and Packing

Wireline Logs

Witnessing & QA Procedures
Quick-Look Log Interpretation

MWD/LWD Services

Directional Surveys
Formation Evaluation Services

Documentation & Reports

Daily/Weekly
Lithlog & Composite Log Preparation
End-of-Well Report

Practical Wellsite Geology

Description & Evaluation of Drill Cuttings
Oil Show Evaluation
Basic Log Interpretation
Construction of Lilthlog from cuttings and log data

Geosteering & Geological Control

Geological Targets

Structural & Well Path control
Landing the Well
Drilling the Reservoir
Calling T.D.

Geosteering Case Study

WO1: Introduction to Drilling & Wellsite Geology

Target Audience

Wellsite Geologists
Operations Geologists
Mud Loggers
Drilling Engineers
MWD Operators
Directional Drillers
Technical & Support Staff

Course Aims

To provide an introduction to drilling technology and wellsite formation evaluation techniques for those personnel new to the industry or transferring from non-operational roles.

Delegates will learn:

About well planning and rig selection
About the drillstring, bits, drilling fluids, casing and cementing, completions, well control and directional drilling
How wellsite geologists & mudloggers collect & interpret geological & drilling data
About Coring, Wireline Logs and MWD Services
How to evaluate and describe drill cuttings and oil shows from practical work

Course Length

5 Days

Course Fee

£2050 (+VAT)

WO1: Course Outline

Drilling Technology

Well Planning & Rig Selection
Drilling Equipment & Techniques Drillstring Design & Bit Technology
Drilling Fluids & Well Control
Casing & Cementing
Directional Drilling

Wellsite Geology & Mudlogging

Well Planning & Rig Selection
Evaluation of Drill Cuttings
Gas Detection and Interpretation
Lithology Logs
Safety Monitoring

Formation Evaluation

Well Planning & Rig Selection
Coring Procedures
Wireline Logging
Logging While Drilling
Oil & Gas Show Evaluation
Geosteering Techniques

Drilling Rigs

Land Rigs
Floating Offshore Rigs
Fixed Offshore Platforms

Drilling Technologies

Bit Technology

Bit Design: Roller Cone & Fixed Cutter
Drilling Applications
Formation Evaluation Considerations

BHA Design, Drill Pipe
Hoisting, Rotating, Motion Compensation
Well Control Equipment

Drilling Fluids

Properties & Specification
Water Based Systems
Oil Based Systems
Synthetic Fluids

Fluid Circulation System
Hydraulics Calculations
Casing & Cementing
Directional Drilling

Applications
Steering Systems
Formation Evaluation
Survey Tools /Calcualtions

Drill Returns Logging

Mudlogging Services
Cuttings Recovery
Lag Time Calculations
Depth and ROP Recording
Hydrocarbon Gas Evaluation Total Gas
Chromatograph
Enhanced Gas Evaluation
Interpretation of Gas Data

Wellsite Geology

Cuttings Sampling and Preparation
Cuttings Description Clastics
Carbonates
Evaporites
Reporting Procedures
Lithology Logs
Oil & Gas Show Evaluation UV Light and Solvent Tests

Coring Operations

Conventional Coring
Sidewall Cores

Formation Evaluation

Wireline Logging Operations
LWD Operations

P1: Formation Pressure Evaluation

Target Audience

Wellsite Geologists
Operations Geologists
Mud Loggers
MWD Operators
Directional Drillers
Technical & Support Staff

Course Aims

To familiarize delegates with the challenges of planning and drilling wells in a safe operating window to minimise Health and Safety Incidents and Non-Productive Time.

To provide practical instruction in pore pressure and fracture pressure prediction to produce PPFG plots.

Delegates will learn:

How to calculate and plot normal hydrostatic pore pressure and overburden pressure
About the mechanisms that generate abnormal pore pressures
How to calculate fracture pressure for LOT data and mathematical models
How to produce PPFG plots from offset well data

Course Length

3 Days

Course Fee

£1500 (+VAT)

P1: Course Outline

Pressure Concepts and Gradients

Definitions and Normal Pore Pressure
Overburden Pressure Calculations
Pressure Gradient Calculations
Fracture Pressure Estimations & Modelling

Abnormal Pressure

Causes of Abnormal Pore Pressure
Pore Pressure Estimates from:
Dxc, ROP, Mud-Gas relationships
Petrophysics
Borehole Stability

Fracture Pressure & Well Planning

Evaluation of Rock Fracture Pressure:

Leak-Off Tests
Mathematical Modelling

Borehole Stability
Kick Tolerance
Well Control Procedures
Well Planning Issues

Introduction

Well Planning Requirements
Safe Operating Window (PP-FG)
Pore Pressure prediction and detection
Wellbore Stability
Fracture Pressure

Health, Safety, Security, Environment

Requirements and Well Planning
Recent Incidents
Operator Responsibilities
Individuals’ Responsibility
General Duty

HP/HT Drilling: Definitions & Challenges

Definitions of HPHT
High Fluid Density
High Formation Temperature
Narrow Operating Windows
Managed Pressure Drilling

Formation Pressure Evaluation

Fundamentals
Hydrostatic Pressures
Pressure Gradients
Elevations and Datums
Formation Balance Gradient

RFT data and PZ plots

Overburden Pressure Gradient

Data Sources
Calculation methods

Origin of Abnormal Pore Pressure

Compaction Disequilibrium
Aquathermal Processes
Clay Diagenesis
Stratigraphic Processes
Tectonic Processes
Fluid Expansion

Practical Formation Pore Pressure Evaluation

Seismic Data
ROP and Dxc
Formation Gas Evaluation
Borehole Behaviour
Drilling Parameters
Drill Cuttings and Cavings
Geothermal Gradients
Wireline/MWD Data

Methods

Trend Line Methods

Ratio
Eaton
Equivalent Depth

Unloading

Bowers

Fracture Pressure Gradients

Leak-off Tests
Mathematical Modelling
High Angle wells

Kick Tolerance

WPFT1: Geological Control on Drilling Performance

Target Audience

Subsurface and drilling personnel involved in Well Planning and Delivery:

Well Planning Engineers
Drilling Engineers
Exploration Geologists
Operations Geologists
Wellsite Geologists

Course Aims

To examine rocks in the field and build a mutual understanding, within the team, of why rocks drill the way they do.

To understand the geological significance to drillers
To understand the drilling significance to geologists.
To appreciate geology that is predictable and what is not
To help reduce uncertainty and geological NPT.
To promote the value of field and outcrop analogue, in the well planning process.
To improve performance in a cost challenged environment.

Delegates will learn that:

During post-well evaluation of drilling problems it is often apparent that warning signs were missed, not recognised or ignored.
Inappropriate reaction to observed warning signs often exacerbate or escalate problems.
Many geology related issues experienced while drilling, or geological NPT, can be predicted and mitigated during well planning
Appropriate mitigation to unforeseen geological events experienced while drilling can be developed and promoted within a team to ultimately yield improved performance.

Course Length

5 Days

Course Fee

On Application

WPFT1: Course Outline

Workshop Overview

A short field course to examine Geological control and influence on drilling predictability and performance.
It is a practical workshop, predominately field based using locations in and around Dorset and Somerset, southern UK.

Course Summary

The standard workshop is based in Dorset and travels to other locations in Somerset. Bespoke workshops can be designed around other areas of relevant geology specific to client requirements. This is particularly useful if a team wants to gain an appreciation of drilling considerations around a particular stratigraphy, structure or lithology, or perhaps to gain a better understanding of perceived or historically recognised problems.

Discussion Topics

Drilling unconsolidated, and poorly cemented sands
Mudrocks matter to drillers!, and getting to grips with gumbo
Sandstones, Chalk, Marl and Limestone - Planning for and managing losses
Geological Scale -Seismic vs log resolution vs outcrop scale
Faults, folds and other geological structures at various scales, and the problems that they can cause
Bedding, Joints and other discontinuities and their influence on drilling
Hard bands and negative drill breaks
Geological control on directional drilling and geosteering
Ledging, Key-seating and wellbore geometry
Considerations for casing running and shoe positioning
Predicting and mitigating drilling problems during the well planning process
Using drilling data to interpret geology in the absence of logs
Geosteering, geostopping and geology at the bit
Predicting and mitigating wellbore Instability
Understanding how geological uncertainty adds to the challenge of drilling
Reservoir, Source and Seal rocks, Oil seeps

C1: Best Practice in Core Handling & Analysis

Target Audience

Wellsite Geologists
Operations Geologists
Petrophysicists
Exploration and Development Geologists
Reservoir Engineers
Technical & Support Staff

Course Aims

To provide an understanding and appreciation for best practice in core handling and processing. Provide an awareness of the effects of mineralogy and heterogeneity on core and log data quality. Be able to design a core sampling strategy and build a core analysis programme for all stakeholders.

The course will be a combination of short lectures, practical workshops and plenary discussions to consolidate learning. Each topic will be presented by the expert tutor using MS PowerPoint presentations. Sessions will be structured carefully to ensure optimisation of learning expectations verbally and on PowerPoint, followed by practical exercises to embed understanding. Discussions and question and answer sessions are encouraged to ensure understanding. Each session will contain a practical exercise which will be either on paper and in Excel. Attendees should be familiar with basic calculation and charting functions in Excel. Attendees will have opportunities to share their own experiences, discuss data and explore any issues they may have had relating to core and core analysis data.

Delegates will learn:

About different coring techniques
How to recover and process core safely and competently
The importance of heterogeneity and mineralogy and their effects on sampling strategy
How to design a core analysis test programme and work successfully with laboratories
How to measure porosity, permeability and water saturation in core
Gain an understanding of methods to integrate core analysis data with log interpretation and geological models.

Presented by Dr. Adam K. Moss, Core Analysis Expert and previously Global Group Technical Authority for Core Analysis at BG Group

Course Length

3 Days

Course Fee

£1500 (+VAT)

C1: Course Outline

Day 1

Course Introduction – Why do we Core?
Introduction to Coring
Coring in ‘Problematic’ Formations – Fractured, Vuggy and Unconsolidated Formations
Pressure Coring
Safe Core Recovery
Wellsite Core Handling – inc. Core Stabilisation Methods
Core Transport to the Laboratory
Factors Effecting Core and Log data Quality
Introduction to Scales of Measurement in Core Analysis and Logs

Day 2

The Effects of Heterogeneity on Core and Log Data
Core to Log Depth Shifting Theory and Practice
Sidewall Coring/Plugging – Tool Types, Sample Recovery and Handling, Limitations
Designing a Core Analysis and SCAL Test Programme
Core Analysis Laboratory Selection
Core Handling in the Laboratory – Sample Selection, Plugging, Core Slabbing and Preserving
Sample Cleaning and Dying Methods
Core and Log Porosity – Understanding Different Measurements and Factors Effecting Data Quality and integration

Day 3

Water Saturation from Core – Dean-Stark Measurements – Theory, Best Practice and Integration with Log and Other Core Data
Permeability – Controlling Factors, Measurement Choices and Quality Control
Pore Volume Compressibility and Net Overburden Pressure - its Effects on Core Analysis Data
Mineralogy from Core. Different Measurement Types and Integration with Log Data
Integration of Reservoir Geology, Core Analysis and Log Data
Petrophysical Rock Types. An Introduction to Different Rock Types (Inc. Flow Zone Index). Integration with Core and Log Data. Comparison with Geological Facies.
Definition of Pore Geometry from Core using Mercury Injection Capillary Pressure, Backscattered Electron Microscopy and CT Imaging
Course Conclusion and Review