RE: Ezhik Ageos6 Sep 2019 03:32
Helpful - you won't be able to get most of the information you're requesting from just looking at the cuttings samples / wireline logs.
All you will garnet from the Mudlogging side is an increase in gas in the drilling mud once back at surface and fluorescence cut showing there are hydrocarbons present (how much you can not determine).
The photo of the Geologist is him examining a standard 'captured' sample depth at a pre determined sample interval (every 10m), but in case of very slow drilling or a zone of importance 1-2m spot samples may be taken. What you see in the photo is standard mud loggers / well site Geologist spot plate for testing for hydrocarbons, but also for adding acid to see if the rock fizzes or for testing for cement when drilling out the previous casing string.
Wireline logging runs are taylor made for the Client depending on how much information they want to gain and most importantly how much the tools / logging package will cost lol.
Normally they will run a suite of tools that will include gamma (basically tells you if its shale / sandstone / limestone deepening on the radioactive elements), resistivity (tell you if it contains oil, water or gas...easily to spot as each one has a different signature on the curves), radioactive source will be run (to determine porosity / permeability both key to actual production rates)
The following log shows how the individual curves from the various tools show when hydrocarbons are present. You can't get the whole picture from just one tool, but once you line them all up then it is a lot clearer.
https://www.delekdrilling.com/geology/appraisal-and-development
It is always nice to get an RNS, but I would not be surprised at all if we will get one once (hopefully) all the production testing is completed.
2nd September tweet said "......analysing cuttings from the Middle Eocene formation target zones" which would suggest they are just logging the Middle Eocene drilled zone, as they still had to drill circa 300m to drill after that into the Upper Cretaceous which would seem rather quick.
Once reason perhaps for logging the Middle Eocene now is to log the section while the well bore is clean to get the best logging results and stops any hole issues while running the wireline tools in and out of the well. If you have slow drilling then mud cake will build up on the sides of the well which narrows the size of the borehole causing the tools to have issues passing through and the individual sensors will be attenuated due to a 'cement like' build up on the sides.
The next tweet will tell us if its further drilling operations or production testing.
https://twitter.com/zenithenergyltd/status/1168493396576653313?s=20
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