Virtual Petrophysics

Virtual Petrophysics provides expert Petrophysical consulting technologies to clients around the world.

Our virtual technologies consist of the highest quality Petrophysical processing and interpretations that are fully documented, and presented over the internet to offer significant cost savings which can reach up to half the cost of a project.  Additional savings can be realised by using our high-end log processing of NMR, Borehole Image and Full Waveform Sonic logs in lieu of service company field or computer centre processing. We bring value to your data!

Our Principal Petrophysicist is SCOTT DODGE who has over 30 years experience with ExxonMobil on 7 continents, 19 countries and 27 sedimentary basins. He has extensive experience in both clastic and carbonate reservoirs in North and South America, West Africa, Middle East, Europe, Asia and Australasia with specialisation in field studies, rock typing, NMR applications, special core analysis, cased-hole surveillance, and drill well FE programming and evaluation. Early in his career he spent 2 years in a dedicated Formation Evaluation Expert programme at Exxon Production Research as one of only five graduates of the programme, consisting of Well Testing, Petrophysics, Core Analysis, Cased Hole Nuclear and Mud Logging.

Our technical publications can be obtained free of charge by contacting us.

Try out our new Virtual PPS Petrophysical Applications under development.

Let us apply our expertise and technology to your own reservoirs by contacting us.


  • Job design, planning and coordination with Drill Team and Service Companies
  • Real-Time Supervision, QA/QC
  • Real-Time Petrophysical Analysis: N/G, Porosity, Water Saturation, HCPV, Fluid Contacts and Fluid Typing
  • Programme Design
  • Programme Supervision, QA/QC
  • Porosity, Permeability, Grain Density, Dean Stark Saturations, drainage and imbibition Pc, relative permeability Unsteady-State and Steady-State (Ambient and Net Confining Stress)
  • Programme Design
  • Fluid Contacts
  • Fluid Type Identification
  • Water/Gas Entry
  • Production/Injection Profiles
  • Fluid Holdups
  • Core calibrated/validated porosity, saturation and permeability.
  • Saturation Model: height functions, log or core based (drainage Pc)
  • Permeability Model
  • Vertical and Lateral water conformance.
  • Water breakthrough identification in producers and observers.
  • Water mobility in TZ based on relative permeability.
  • ROS core and log based.
  • Job design and planning
  • Programme Supervision, QA/QC
  • Quick-look interpretation Porosity, Swirr, Permeability, Hydrocarbon Pore Volume
  • Standardised reprocessing (phase, stacking, porosity calibration, T2 distributions)
  • NMR pore typing
  • NMR permeability modelling, Permeability-thickness, Permeability-thickness profile
  • ROS NMR Log-Inject-Log (Manganese Chloride)
  • Bitumen Detection
  • Job design and planning
  • Programme Supervision, QA/QC
  • Static & Dynamic images
  • Speed Corrections
  • Bad button identification and reprocessing
  • Structural and Stratigraphic dip determination
  • Borehole breakouts, Drilling Induced and Natural Fractures, and Fault interpretation
  • Principal Stress Orientation
  • Job design and planning to measure monopole P&S, dipole Shear, Stoneley wave slowness
  • Programme Supervision, QA/QC
  • Processing: Inspect individual waveforms and exclude bad receivers
  • Time average, depth average, or frequency filters
  • Create slowness time coherence semblance log
  • Picking/labeling coherence maxima. Iterative process using guide log.
  • Dipole dispersion correction
  • Travel times from transmitter/receiver slowness log

Included in All Products

  • Standard Documentation Report and Summary Presentation
  • Pre-processing multi-pass splicing, depth alignment, environmental corrections.
  • Log graphic presentations in PDF or CGM format
  • Reprocessed channel outputs in LAS or DLIS format


Detailed Experience


VPPS Byte 4: NMR Echoes – The Good, The Bad and The Ugly

VPPS Byte 2: Critical Water Saturation, What is it and how it impacts NMR and Capillary Pressure mobile water

VPPS Byte 1: How can I integrate my NMR log data? Or Is it Water or Hydrocarbon?

Petrophysical Properties of Common Sedimentary Minerals

NMR Technology LinkedIn Discussion Reply

Modern Day Braided Stream Deposits

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