RE:RE:Venezuela says Guyana oil is rightfully theirsInteresting situation...
The current blocks approved for development are heavily weighted in favour of the oil companies compared to say Brazil. Guyana has a population of less than a million people. It's military is comprised of 4150 people and it's navy is the Coast Guard.
There is a military cooperation agreement between the US and Guyana which recently been re-activated.
That said, given the Biden Administration stance on oil, there is a question as to whether the US would actually get involved to protect Guyana if Maduro actually tried something.
In any event, this is something that long term holders of oil companies should keep an eye on since the estimated oil reserves there are the fourth largest in the world.