[Tagging] man_made=gas_well Was man_made=petroleum_well vs man_made=pumping_rig

[Joseph Eisenberg]

> Christmas trees are intended to regulate the well pressure or manage filling product injection to raise field pressure.
> You'll find them independently on oil or water wells depending on the pressure.

Very few water wells have high enough pressure to require such a
device. 99.9% of water wells are a few meters to a few tens of meters
deep, and most of those that are mapped in Openstreetmap are in
low-income countries where they will have a manual pump on top, or a
bucket that goes into a hand-dug well.

Tags in Openstreetmap are designed by ordinary people for mapping the
usual situation. They do not need to cover the 0.1% of cases that are
strange exceptions or outliers.

But it's perfectly fine to create a new special tag if you want to map
a 1000 meter deep, high-pressure artesian well, and think it necessary
to specify more details. There is no need to deprecate common, easy to
use tags like man_made=water_well.

"The same applies on geothermal wells with substance=steam or
substance=water + utility=heating
https://www.slb.com/drilling/rigs-and-equipment/wellhead-systems/geothermal-wellhead-system"

I agree, and I would not use man_made=water_well for a geothermal
energy facility. Usually these are complex loops where water is
removed but then re-injected. They are not similar to a normal water
well, where groundwater is extracted for drinking or irrigation or
other direct human uses.

There are very few geothermal energy production facilities, compared
to the number of petroleum and water wells in the world, and I don't
think many mappers are trying to map the details of geothermal energy
sites, so power=plant + plant:source=geothermal is enough for most
cases, plus power=generator + generator:source=geothermal, but feel
free to create a new tag for the special details of water circulation
in geothermal plants if you are interested.

- Joseph Eisenberg

On 2/27/20, François Lacombe <fl.infosreseaux at gmail.com> wrote:
> Hi
>
> Le jeu. 27 févr. 2020 à 00:23, Joseph Eisenberg
> <joseph.eisenberg at gmail.com>
> a écrit :
>
>> Different tags are used for petroleum wells vs water wells because
>> they look totally different and their function for the general map
>> user is quite distinct. A water well might just be a covered hole, but
>> if it is a bored (drilled) well it will be connected to a manual or
>> powered pump.
>>
>
> I respectably disagree Jospeh,
>
> As mentioned, many countries actually drill ground to look for water
> hundred meters down.
> Water is collected like oil here and the well just look the same as
> petroleum.
>
> https://www.canadianconsultingengineer.com/features/the-great-man-made-river/
> "The first, 15 years ago, was a mandate to drill and construct 117 water
> wells, 36 piezometer wells and 23 exploratory wells in the Tazerbo area in
> east-central Libya. Some of the wells had to be drilled to a depth of 1,200
> metres, the length of 11 regulation football fields"
>
> I think it's a bad idea to include the substance or purpose in the well
> value as same facilities may be built to collect petroleum or water.
>
>
>> An oil or gas well has a fire-hydrant like structure on top called a
>> "Christmas tree" or a pumping rig like a "pump jack" - you will not
>> mistake them for a water well.
>>
>
> Christmas trees are intended to regulate the well pressure or manage
> filling product injection to raise field pressure.
> You'll find them independently on oil or water wells depending on the
> pressure.
>
> The same applies on geothermal wells with substance=steam or
> substance=water + utility=heating
> https://www.slb.com/drilling/rigs-and-equipment/wellhead-systems/geothermal-wellhead-system
>
> However I'm ok to say that a traditional water well (as any surface well)
> don't look the same as industrial drilled wells.
> So two or more value of man_made may be useful to reflect those difference
> but please don't include any substance indication in man_made values.
>
> All the best
>
> François
>