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Bubble point may turn out to NOT be a disaster after all.
https://onepetro.org/SPEEURO/proceedings-abstract/06EURO/All-06EURO/SPE-99369-MS/141072
"Of all the fields operating locally below the bubble point, reservoir damage was indicated in only two fields both of which had flowed with bottom hole pressures of about 50% of the bubble point pressure compared with a more normal minimum flowing bottom hole pressure of around 75% of the bubble point pressure."
"More extensive production below the bubble point can also have benefits in displacing oil from low permeability regions for instance and may be used where field economics do not warrant drilling injection wells. In this case high GORs may be produced."
" do not fully understand what it means to have reached bubble point'
The oil has gas dissolved it it. It stays in the oil until the pressure drops to a point known as the Bubble Point. Below that pressure there is a risk that the gas will start to come out . If it does so in the reservoir it may migrate locally into the higher spots in the reservoir - as these gas pockets get bigger they may cut off oil from the producing well bore.
Good practise is to avoid dropping below BP as far as you can - it makes life much tougher as time goes on and can possibly be fatal.
There was a small field in the Shetland area where this happened big time in the '80's
Thanks spades - have just come in on a modest investment
Cheek - its pretty easy to google so i can understand Dickbats suspicion of your question.
Basically the reservoir pressure will reduce to a point where the fluid vapour pressure is reached and it will turn the oil well into a gas well. Maintaining the DHP is of utmost importance and you wouldnt be pulling the ar*e out of a well that has potential to F* up the whole field.
I dont know the current data, DHP or choke on the well so i don't know if they are pulling the Ar*e out of it or not. In my experience Field managers and reservoir engineers are on the whole very professional people, and they have access to far more data than is in the public domain, so, Id have to to guess they are not.
I have no idea what the consequences are fo oil production of this issue. God knows how this Bubble Point stuff works in practice
Dickbat - a good nickname you for that kind of response - I have spent hours looking for clarification on this - but clearly you have no idea hence your motives based attack
Sure you are..!! Pathetic attempt try and be a bit more sophisticated..!!
Would be interested in investing here but do not fully understand what it means to have reached bubble point'
I have read about it and some say it is an indication of field output decline 'quickly'
I also read in one RNS that they are obliged to close the field should they reach bubble point and start producing gas
Any enlightened view would be welcome as it goes way beyond my skill level
Genuine question - How serious could this issue be?
Based on current trends, management estimates that wellhead flowing pressure in the Lancaster reservoir may reach the bubble point by the end of Q1 2022, consistent with the time range estimation previously announced on 25 May 2021. Whilst this has been factored into the guidance for the Period, there will remain a degree of uncertainty regarding the full impact of this, along with the risk that gas liberated from the reservoir could be produced which could result in production either being reduced or ceased altogether.