Charles Jillings, CEO of Utilico, energized by strong economic momentum across Latin America. Watch the video here.
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Thanks Scott, Monkey. Really useful info. I'm sure the company is probably doing a review of 'what happened?' themselves, and hopefully we will find out in time. I suppose the thing to remember, is that exploration in deep wells is never straight forward, and it might take another two or three wells before they really understand Chinook?
you are right on mentioning mud weight, in relation to the pressure and the formation too. they did almost lose the Cascadura1 well. And had similar trouble at Casca despite upgrading rig
Great stuff! Thanks! Just a bit annoyed with the updates (RNS) from the Company. I feel we need an fair explanation of how Chinook "world class gas well" became a -potential- oil well. As PB said himself, the Company is mainly a retail story. So tell us! We deserve it. I know it's exploration drilling, things happen etc... But the interview with proactive indicates something not written in the RNS. Chinook is considered a duster by the market, so will probably surprise to the upside at some point.
In one of the first wireline tests, they normally would do at Chinook would be a density test? to determine which oil and gas or water are present. We were told gas from three layers, now its oil, so not got my head round that. Could it be both or a density test not done, just thought to throw that in the mix. Happy to be corrected.
Difference in practice for mud weight based on the pressures you would think you might see in the formation. You don’t want an influx of either oil or gas. Oil will change density of mud to be less dense, which is lighter weight allowing more oil in, and the circle continues unless controlled until blowout. Especially don’t want gas influx which expands as it moves towards surface displacing even more mud in well which means less weight to hold, viscous circle, and is the quickest way to blow out land. This is a kick, and has to be dealt with correctly and timely.
Mud too heavy can damage formation by clogging it up, can also lose a bunch of mud to formation, and end up with a blow out for the same reasons above. It’s about finding the happy medium place between not enough and too much.
In my opinion only, I believe it is possible TXP went a bit heavy on the mud after the high pressure experiences in the other wells. We do know they used very heavy mud in the 50’s and 60’s, and this is likely why they didn’t register the gas at Cascadura when it was drilled before.
So, goal is no unflx of either gas or oil, but keep mud as light as possible without screwing it up and having a blowout or uncontrollable kick.
Damage to well bores is complex issue. Many factors including formation, water, pressure, perforations. Sometimes hard to test multiple levels in same well. Salt is issue in some geological formations but not here. Appraisal wells sometimes don’t produce perfectly but can be used to target specific development wells that are completed in manner to minimize damage and risk to production.
Potential damage to the Chinook well was something PB said was being investigated. Daft question - are there any differences in practice if you think you drilling for oil or gas, and impact if you hit the other? I've tried to research, and the Geology seems to have more impact than the target. However, would appreciate illumination from those with more O&G knowledge and experience than myself.
Damage Chinook*
After listening to the latest Proactive interview.. The way I hear it. And some people already mentioned it. Did they actually damage the well when testing? And therefore all the precaution when testing Cas deep. Anyway, it's probably a learning process. And they're learning from their mistakes. Who can blame them.
Good things come to those who wait Jorgen!
Txp have become a bit "boring" as its no big surprises (positive) coming i think. We need to way for everything now, we wont suddenly get RNS’ about every little thing. See the latest interview with PB, says the next big thing is Royston, doesnt want to talk about the "small" things in between like Coho, western oil etc