I've had a pretty good day, starting with a cheeky lie-in (finally!!) and typing up some notes on what I have been learning from the PTs.
In the afternoon, Ravil, Vitaly and Andrey (PT) announced they were going out to pad 1A to look at the water injection plant there. I was about to start having a cuppa with Luc and on impulse asked Vitaly if i could tag along...request granted :-)
It was very interesting to see the water injection pumps and how everything was connected. Very briefly, here is the idea: it is important to keep pressure up in an oil reservoir, so it keeps producing its oil. But if you start taking enough oil out, pressure is going to drop as there is less fluid in the same space. So to keep up pressure we can inject water into the reservoir, and wells are drilled following a special pattern with this concept in mind.
The water needs to be pumped along to the injector wells and into the reservoir at high pressure; this means you need large pumps which heat up the water and bring it to high pressures.
The water in this case is currently coming from some of our existing wells; it then goes into a couple of large separators (which we got a chance to examine) which separate gas from the water, then into a small centrifuging machine that separates out any particles and finally through into the main pump. The water is distributed through a pipeline to all water injector wells in the field.
Cleverly I completely forgot to take the camera so have no photos to illustrate this, but it has been really helpful for visualising how this kind of set-up works. I remember vaguely looking at some diagrams of similar installations during EP00 and dismissing it as the most boring topic ever, but I have now revised my opinion!
Anyway, ran into Jim, head of ops, after dinner (less than an hour after getting back) and he started winding me up about going onto one of his sites without an HSE induction. He caught me completely by surprise! Clearly news travels fast and they don't get visits from devushki very often so they noticed I had never been to this pad before...oh to be a man sometimes (very rarely) (almost never)...
Monday, May 07, 2007
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1 comment:
Interesting about the water injection. How successful is the water in staying below the oil or does it become an emulsion. And how large are these pumps ? Large TV, size of car ? Size of bus ?
U.R.
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