could you please help me for the below case:
Reservoir oil-gas, sand formation,with gas cap and strong aquifer.
long time production and it was shutb down all wells for one month the resumed production with the same condtions that was before shutdown and it was observed that:
- clear Reduction in the production(as field) than before shut down
- increase in water cut in some wells only than others
- incease oil production in some wells and decrese oil production in the others

Any explaination for the above will be appreciated and is the field will be back to the previouse production.
Thank yu in advance