Integrated Petrophysics – Quick Look Techniques
|Instructor Mark Deakin, PhD (Petrophysics)
Public courses 3 days. Tailored In-House
This course walks through how to perform a Quick Look Log Analysis which is integrated with commonly available non-log and special log data. The process is easy to understand and performed real-time following established petrophysical principles but within an operations ‘quick look’ setting. The course uses simple multi-disciplinary techniques to quickly cross check and verify petrophysical results on the fly to enable more objective, fact based operational decisions. Log based field development studies can also be checked and verified by these quick look techniques.
Verifying petrophysical results moves you into an environment of certainty, confidence and leadership. These petrophysical techniques will benefit everyone downstream of the drill bit.
Course Level: Foundation
Who Should Attend?
Operations Geologists, Petrophysicists, Wellsite Geologists, Experienced Log Analysts, Users of petrophysical results, Geo-modellers, Exploration Managers, Team Leaders. Anyone who could benefit from being aware of the numerous quick and easy but never used techniques that transform quick look log analysis into robust, hard edged results.
Bring your laptop with MS Excel.
You Will Learn
- To do Quick Log Analysis quickly and efficiently with far greater accuracy and far greater confidence than before
- To do your own Quick Look Analysis on your own laptop and save the entire process as a working template
- To quickly understand the essential operating principles, outputs and role of all conventional and special logging tools, their benefits and pitfalls, without getting bogged down in tool theory or irrelevant detail
- To quickly identify porosity, saturation, netpay, fluid contacts, permeability and test intervals in a rapid, easy to understand workflow and become familiar with their typical log patterns
- To recognise your Reservoir Type and what you must do differently in each
- To understand why and when to run ‘special logs’ including Image logs, NMR, Array sonics, Rotary sidewall cores and MDTs
- To avoid wasting time on secondary issues and to keep your mind focused on what really matters
- To acquire the key data that moves the bottom line and to cancel the data that does not. This means making correct decisions real time which is only possible if your quick look is robust. After this course you will know if your results are robust.
- To use PetroDB and other wells quantitatively during quick look to firm up your decisions
- To verify your geo-models and field development log analysis with simple, effective techniques
- To present your results succinctly and with conviction because you know they have been cross checked against hard data using established petrophysical principles
Quick Look Objectives
Logging Tools & Curves. Briefly: Mnemonics, Essential physics, Role during evaluation, Recognising & reducing the impact of common problems
- Caliper: simple – 6 arm
- Total and Spectral Gamma Ray
- Spontaneous Potential
- Resistivity: Induction, Laterolog, Micro, Multi depth, RhRv (3D resistivity), Standoff
- Density, Photoelectric, Density correction
- Neutron: Thermal, Epithermal, Sigma
- Compressional sonic
- Image logs: resistivity & sonic
- Modern geochemical tools including Lithoscanner
- Nuclear Magnetic Resonance (NMR)
- Array sonics, shear waves, cross dipole, Stoneley
Log Quality Control LWD & WL: essential curves, what to do, how to achieve optimal logs
LWD and Wireline: combined use of
Mud: Water and Oil base. Why you must have good mud and how to achieve it
Supporting Data: Offset wells, PetroDB, Analogues – which data is critical?
Quick Look modules in petrophysical software. Assumptions, Pitfalls and cross checking their results
All calculations are performed real-time on Interactive Petrophysics (IP) software
Vshale & Lithology calculations and cross checks
Porosity calculations and essential cross checks. Gas Zone porosity
Recognising Reservoir Types. The necessary modifications to data acquisition and work flow
Water salinity (NaCl) & Rw. Placing feasibility limits on the most important exploration uncertainty
Workshop: Lithology, porosity and salinity Quick Look Integration Techniques. Hingle – Pickett plot iteration
Archie Sw: calculation, cross checks and Shaly Sand flag
Quicklook Shaly Sand. The difference in Quick Look method. Essential cross checks
Permeability, Pay, Free Water Level
Workshop. Full Circle: how to use the quick look evaluated porosity, saturation and permeability with NMR and/or generic Capillary Pressure data to cross check and reconcile results
Problems Reservoir Types – Carbonates, Low Contrast Pay, Fractures & Response to class requests
MDT: how to confirm & iterate quick look results
Quick Look Techniques spreadsheet – indispensable!
Daily Recaps, Questions and Debate. These debates will revolutionise the way you think about and perform quick look log analysis
This course is not difficult; it is common-sense but will surprise the experienced log analyst who has never used the numerous simple, easy to apply techniques which transform quick look log analysis into fact based petrophysics. These techniques eclipse sophisticated, black box log analysis and are mostly completely free to use. If resources are to be spent on push button log processing or running special logs it is advisable to at least be aware of these simple checks.
Mark Deakin is a consultant, author and course instructor in Petrophysical Data Integration. He holds a Ph.D. in ‘Integrated Petrophysics’ from London’s Imperial College, is an ex Amoco petrophysicist and has over 25 years’ experience, including 18 as a course instructor with PetroSkills and HOT Engineering. He has performed over 60 detailed reservoir studies worldwide; primarily in Southeast Asia’s low-contrast pay and carbonate & fractured reservoirs. Deakin’s proven approach is to identify and rank reserves uncertainties then guide companies towards defensible booked reserves via the application of new technology, targeted data acquisition and the systematic, logical integration of all related data. After his PhD Deakin authored the first public Integrated Petrophysics course in 1989 which evolved into the industry’s benchmark petrophysics training course. This was followed by courses in Carbonate & Fracture petrophysics and 3 day focused modules on How to use Modern Logs with SCAL, Quick Look Integration Techniques, Low Resisivity Low Contrast Pay, Laminates & Thin Beds, Using PetroDB effectively and Renewable Energy. The uniquely powerful PetroDB-WEB core-log-test linked database is his current project. Deakin is an active member of SPWLA and occasional lecturer at Curtin University and his consulting company PETROPHYSICS Pty Ltd has offices in Perth, Australia