By Scott Dodge (Virtual Petrophysics) and Craig Phillips (Crested Butte Petrophysical Consultants)Accurate permeability estimation from High-Pressure Mercury Injection (HPMI) core data is not only possible — it may be essential for understanding matrix properties in challenging reservoirs.This work was inspired by that of the late Dr Doug Ruth and Craig Lindsay (Ruth, D., Lindsay, C., …
Continue reading "VPPS Byte 16: Permeability Estimates from HPMI Capillary Pressure"
Emerson Paradigm provided us the opportunity to present a live webcast on the 19th April 2018. This topic was first presented at the New Zealand Petroleum Conference 2018 and featured in the recent Virtual Petrophysics technical post, VPPS Byte 8. This Virtual Lecture Series webcast is now available for on demand viewing via GoToWebinar. You …
Continue reading "Webcast – Rock Pore Typing a Tight Gas Sand Reservoir"
In this installment of our VPPS Byte posts, is a discussion on the value of rock pore typing in a tight gas sand reservoir and the use of a rock pore type catalogue for your oil and gas reservoirs. In March 2018, Scott Dodge presented at the New Zealand Petroleum Conference a workflow developed for …
Continue reading "VPPS Byte 8: Rock Pore Typing a Tight Gas Sand Reservoir"
Have you ever questioned the quality of the NMR log data in your well? There are all those LQC checks you may make to ensure the CPMG echo train is of good quality, i.e. noise, noise flag, gain, chi, delta_B0, SNR.... Why not look at the echo train instead. All of the above checks are …
Continue reading "VPPS Byte 4: NMR Echoes – The Good, The Bad and The Ugly"
Critical Water Saturation One key petrophysical property that has been overlooked when interpreting whether mobile water is present in a reservoir is the critical water saturation (Swcr). This saturation is an estimate of the minimum connate water saturation (Sw) above which the relative permeability to water (Krw) allows water to flow in the reservoir. This …
Common Objectives Ok. So now you have acquired an NMR log often regarded as a "specialty" service, and you are wondering how do I integrate this into my petrophysical evaluation. This is not your local service company representative selling his wares, but an experienced user of NMR log data. Let's start off with the basic …
Continue reading "VPPS Byte 1: How can I integrate my NMR log data? Or Is it Water or Hydrocarbon?"
Probabalistic Petrophysical Mineral Models In the use of probabilistic mineral models, i.e. ELAN, MultiMin, Mineral Solver, the petrophysical properties of each mineral is required. Thru the years I have developed a table containing these properties for the various log measurements used as input to the mineral models. The table lists the mineral classification, mineral name, …
Continue reading "Petrophysical Properties of Common Sedimentary Minerals"
Is NMR technology used anywhere against laminated reservoirs keeping in view of the vertical resolution of different tools in the industry? AK Saikumar Kakani Advisor-Petrophysics, HLS Asia Ltd, Independent Petrophysics Consultant Thanks to all for your valuable inputs. I have another question. If we are using a mandrel type of tool one being centered and …
Rakaia River New Zealand click on picture to see in Google Maps
