March 2007 Newsletter
Download the complete March Newsletter
February was enlightened by Adrian Adeniran from Inteq and our resident VP Dialog & publication Iain Hillier who talked to us on depth evaluation in LWD and wireline environments at the last LPS Evening Meeting
The LPS membership stands at 60 (bravo Assia) but Are you a LPS member? If not, contact as soon as possible Assia with your renewal or joining fees. (Membership form attached).
Coming up:
Next week on the 8th of March we have the long awaited seminar on Reservoir Modelling Seminar (Details by our VP newsletter).
On the 22nd of March Dr. David Potter Anadarko Senior Lecturer in Petrophysics and Formation Evaluation at Heriot-Watt University will be getting magnetically susceptible through a Rapid, Non-Destructive, Complementary Technique for Improved Petrophysical Appraisals (abstract attached).
On the 19th of April Christian Bucker of RWE-DEA will reveal some hot topics on Geothermal Petrophysics (Feasibility of Geothermal Power Generation in the German Upper Rhine Graben. An Analysis of the Geological and Petrophysical Conditions)
We are looking for presenters for our May and June evening talks. So if any of you wishes to share a Petrophysical interesting topic with the fellow of the LPS please contact Kirril .Towards the end of June we plan a re-make of the Immersive Visualization now dubbed the Viz2 seminar.
Finally there is a stronger and stronger rumour that our website is going to re-launch
imminently with a new look through a new provider (Thanks to Iain Hillier for spending
lately so much on this). Try it soon: www.lps.org.uk
Patrick Crossouard LPS President
The next evening meeting will be on 22nd March. Please see the abstract for the presentation for the meeting below;
Magnetic Susceptibility A Rapid, Non-Destructive, Complementary
Technique for Improved Petrophysical Appraisals
Dr. David K. Potter
Anadarko Senior Lecturer in Petrophysics and Formation Evaluation,
Heriot-Watt University, Edinburgh EH14 4AS
Magnetic measurements provide a rapid, cheap and non-destructive means of characterising high resolution mineralogical variations between core samples. Until now they have been a relatively unexploited tool in petrophysical core analysis. One of the most useful measurements is low field (initial) magnetic susceptibility. This talk will show how such core measurements, both the raw results and novel processing of the results to mineral contents, can provide rapid predictions of key petrophysical parameters (in particular clay content and permeability). The measurements allow quick look petrophysical appraisals to be made long before the usual routine or special core analysis data becomes available. The negative or positive sign of the raw magnetic susceptibility signal is shown to strongly correspond to the main lithological and permeability zones. Moreover, the processed results have exhibited strong correlations between magnetically derived illite content and permeability in oilfields where the porosity-permeability relationship is very poor. Furthermore, the magnetic measurements have correlated with the flow zone indicator (FZI), the cation exchange capacity per unit pore volume (Qv), and the wireline gamma ray signal.
The relationship between magnetics and wireline gamma ray provides a quantitative means of distinguishing clean sand from muddy sand, even in the presence of a high gamma ray emitting (but low magnetic susceptibility) drilling mud. The measurements also allow the wireline gamma ray data to be related to illite content.
Recent work has also indicated that magnetic susceptibility measurements at higher fields are capable of producing even better results, by minimising the effects due to small amounts of any ferrimagnetic minerals present.
From VP Newsletter
Next Seminar - LPS Reservoir Modelling Seminar, 8th March
The scope of this seminar will revolve around the petrophysical inputs to 3D Geocellular
reservoir modelling, i.e. the determination, upscaling and distribution away from the wellbore
of facies, porosity, saturation, permeability and the use of core and seismic data in
conditioning these models. The seminar stems from an observation by many LPS members in
conversations with board members that ownership of petrophysical data is often a cloudy
issue in the multi-disciplinary environment that 3-D reservoir modelling engenders, and it is
often a concern that there are many opportunities change the distribution of reservoir
properties between the step up from wellbore to reservoir scale if one does not understand the
mathematics of the (many) geo-statistical approaches available to the reservoir modeller.
We have presentations from software vendors such as Roxar and Schlumberger,
consultancies such as Fugro-Jason and oil companies such as Shell and Statoil.