The same petrophysical principles apply to all reservoirs but a clastics style log analysis can be completely misleading in carbonates or fractured reservoirs.  Here, petrophysics is dominated by forces unfamiliar to the clastics geoscientist, including diverse pore-geometries and the absence of total porosity and clays as basic controls on reservoir quality.  This requires the petrophysicist to think hard if petrophysical results are to provide a secure basis for decisions. 

A variety of examples from shallow, permeable carbonates to tight fractured carbonates and basement are employed to demonstrate the often severe shortcomings of conventional approaches.  The physical differences between Clastics and Carbonates & Fractures are explained in the context of how to achieve the answers we require require from conventional logs.  The Failure Points which result are highlighted and juxtaposed with the Author’s purpose designed "Recipe".  First, physical characteristics are translated into petrophysical uncertainties, then the Drill-Core-Log-Test acquisition and integration process, designed to address them, is systematically worked through.  This course is a condensed learning session of interleaved Theory, Case histories, Excel micro-practicals, Interactive Petrophysics data interrogations, Excel workshops and Movies which clearly reveal the issues and why the Author’s Recipe works.  A powerful carbonates Excel theory/workshop to derive and integrate capillary-pressure Sw's with core and logged resistivity concludes the course.  Drilling data, routine and special core, conventional logs, ECS, NMR, Sigma & C:O logs, Sonic scanner, Image logs and MDTs are all briefly explained and logically assembled into an exhaustive "petrophysical recipe" for geo-modeling inputs and reserves.  This course provides a new found confidence and much needed systematic process for staff faced with the daunting prospect of managing complex reservoirs.  This process has been adopted and used successfully by a number of operators.

3. Actual Well/Field Evaluation Workshop - Computer      Details    Schedule

PPL and students perform an actual evaluation on a cored well, purpose designed data set, or client supplied data set.  Data is loaded to PPL and client software.  ALL major stages necessary for a full petrophysical integration are discussed and then actually performed by both Instructor and students.  A twice daily open critique and proposal session of the ongoing evaluation keeps the class highly motivated and tightly focused.  The evaluation sequence is continuously displayed to reinforce real-world constraints of Time vs. Fit-For-Purpose results.  All evaluation parameters are documented together with a short report and key figures as in a real study.  Stages include: Log, Core, SCAL, MDT, and DST data organisation and loading, zonation, vclay, total and effective porosities, water zones, Rw, Pickett plots, Rwa, m, Ro prediction, n, Swrt, Fluid Zones, Bound fluid volumes, Coates permeability, Capillary pressure quick-look Sw's (yes, this is possible see Integrated Petrophysics..), Base case Sw, Swrt optimisation, Netpay, Zone averages, short Report and Figures.  All data is properly integrated according to PPL standards.  Certificates detailing each major stage are checked and issued for each student.  These 5 days offer a powerful, dynamic training session in which participants actually experience and the practical issues at stake and make the key choices which impact reserves themselves.  Perhaps surprisingly it has been found that no previous petrophysical knowledge is required, however, attendance to IPRC (above) or, if a client supplied carbonate data set is used, to CFP (above),  is strongly recommended. 

4. Parallel Petrophysical Training 

PPL conducts Parallel or remote documented petrophysical training concurrently with technical consulting.  Up to 4 staff engage in a daily critique session of PPL's work and perform a cut-down version of the same tasks the next day.  Their progress is documented and signed off, building competency towards a complete integrated petrophysical field study with all stages undergoing rigorous cross-examination and debate!  This process produces diligently executed, robust studies as well as providing unbeatably cost-effective, hands-on training, within the 'real-world' framework of an operating energy company. 

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