MegaSack DRAW - This year's winner is user - rgwb
We will be in touch
Hiya, I'm trying to convert formation water resistivity from well logs to salinity. Currently I'm using a calculator which is based on the Schlumberger Gen-6 chart ( http://www.rjzpetrophysics.com/html/links___software.html), but would like to know the underlying theory/calcs. Quick googling gives calcs that are only good to 42,000 ppm; I need up to and above 300,000 ppm.
Any recommendations on books, papers, etc. would be very helpful.
Many thanks!
Kit
Can't help directly - not a petrophysicist but that sounds very saline. If you have an Rw can you not get some actual measurements from the core sample?
[url= http://petrophysics-interpretation.blogspot.com/2010/03/resistivity-of-nacl-water-solutions-gen.html ]This[/url] gives up to 300,000 ppm, and you might find a useful calculator [url= http://www.hendersonpetrophysics.com/Downloads.html#Home ]here[/url].
Unfortunately I don't have access to core samples, and in any case I need to make salinity estimates for c. 200 fields 😕 (PhD project, in case you're wondering!)
edit: thanks FlyingOx. First link is to the Schlumberger chart I already have, but second link looks useful, cheers.