Overview

Public face to face and online courses 5 days. In-house courses may be amalgamated with other courses and delivered as 3 to 5 day courses however this should be done with caution.

IPSWHT slide example | Testimonials

This comprehensive course explains how to derive and use capillary pressure saturation height functions in your daily petrophysical work and how to incorporate them seamlessly into your default evaluations. All aspects of saturation height are covered in detail including the core-log prerequisites, selecting samples, lab corrections, fitting the lab saturation-height function, avoiding common mistakes and how to apply the function to the reservoir with core or logs. The porous plate, centrifuge, air-brine, oil-brine, drainage and imbibition lab procedures are explained and contrasted with mercury injection (MICP) to understand their different applications. Reservoir Types and Reservoir Rock Types, including complex vuggy carbonates and laminates are included.

All commonly used fitting functions are explained and worked through and their applications discussed from the simple FOIL (BVW) to the author’s Modified J as well as Lambda, Skelt-Harrison, Brooks Corey and Thomeer. Excel Solver fitting techniques and check plots are shown to ensure precise functions. Two long, detailed, step-by-step workshops, from lab to reservoir HPV, are an important backbone to this course. The workshops provide participants with a simple, reusable saturation-height templates which they have developed themselves and understand. Following derivation of the SCAL function the practical goes on to determine the problematic reservoir IFTcosTheta and to fully integrate each routine core analysis plug’s reservoir J value with logged resistivity – a unique feature of this course. This process produces a modern, cross-calibrated, real-world integrated petrophysical model from the {SCAL – RCA – Log driven} equation for use in the geo-model, or well, by any team member, geo-modeler, reservoir engineer or petrophysicist. A {Lab > Logs > RCA > FWL > Swht > HPV} sensitivities equation chain is then used to interrogate all inputs, including IFTcosθ. This exhaustive petrophysical model can be quickly re-run using log analysis, or directly within geo-models by varying any variable including FWL, IFT, θ, Fluid densities, rhob, rhog, facies, porosity, k etc. Integrating the saturation height model with RCA and resistivity logs in this manner – so the full model can be quickly re-run by anyone – provides a uniquely powerful and transparent quality control which focuses on key uncertainties and harmonizes team thinking from geologist to engineer.

Thin beds and complex carbonate pore systems are covered with thin sections, SEMs and image logs to address real-world saturation-height issues which are usually glossed over, including how to properly model IFTcosTheta, vugs, fractures, wettability and viscous oil/tar. Pore throat radius calculations and estimates from poroperm plots are included and the impact of complex bimodal pore systems on Swi and Sor is shown and explained.

A similar process is then outlined, but this time deriving the [por-Sw-k-height] relationship from resistivity or NMR logs – a method employed where the petrophysicist believes logs reveal the true reservoir saturation more properly than the available core. The course shows how the full NMR T2 spectrum can be used to create a robust, calibrated saturation-height model, far superior to the standard reservoir engineering porosity band method.

Applications include: – common use equation set for geo model and petrophysics; core-log n; thin bed shaly sands; vuggy carbonates; missed/bypassed pay and tracking OWC rise.

This course is integration! Core-Log integration has been the central topic of the author’s Imperial College Ph.D. and over 35 years of technical consulting, reading and lecturing on core-log integration.  It is also the central purpose of the AI assisted PetroDB software which expands essential core-log integration to SCAL and modern logs.

Explains the industry wide saturation-height method and shows how to derive and integrate ALL routine core plugs and logs correctly for a SCAL, NMR or log based capillary pressure saturation height function

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Who Should Attend?

Petrophysicists, geo-modelers, reservoir engineers, core analysts, geologists and engineers who build or use static or dynamic reservoir models.  Anyone with a year’s experience with core-log integration.  Bring your laptop with MS Excel.