RE: Excellent Q&A3 Oct 2023 09:49
Maggoooo,
I will give you a little experiment you can do at home, go find a piece of pipe, any pipe, a meter long or so.
Assume your lungs are the reservoir, it has a limited max amount of pressure that you are able to blow.
now, hold the pipe vertically and blow up it, easy isn't it, almost zero resistance, that is because the density of the air column in the pipe is more or les the same as the air you are blowing from your lungs.
Now, this time take a deep breath, and fill your mouth with water, put the pipe vertically into your mouth and push the water from your mouth into the pipe, and then try to continue to blow that water up to the top and out of the pipe.
You will find it has notably more resistance, it is harder to blow the air from your lungs up the pipe, that is because the combined density of water & air is much higher, but your lungs only have that limited blow pressure capacity.
The more water you add into the pipe column the harder it will become, even to the point you cannot push the water up the pipe, the same in a well, the gas will stop flowing, surface pressure will be almost zero, but the reservoir (like your lungs) has decent pressure, it is simply trapped from escaping.
This is similar to the reservoir pressure acting on ever but slowly increasing amounts of condensate being induced at bottom of well and near wellbore reservoir. the more condensate then the harder that reservoir pressure has to work to send it to surface.
How can you help improve that scenario, because at some point the liquids will eventually make it too hard for the gas to push up from reservoir to surface.
You can remove the original production string (pipe) out of the well, and replace it with a much smaller one, this doesn't change the density in the column, but it does change the velocity that the gas will travel up the pipe to surface, and in doing so will keep flushing out more condensate in the process.
It is similar to hosing down your pathway with a simple hose pipe, and then trying it with a pressure washer, you are still using the same amount of water, but the velocity is significantly higher.