RE: Flaring21 Nov 2019 19:53
Bloobird,
Replying to you, here, because others who ought to know better have responded with silly comments. Follows, an adoubleuk anecdote, anyone fed up with adoubleuk anecdotes please skip this post.
"I wonder if it sounds like 4 jet engines ?"
Accoustically, no. But in general effect, yes.
I think the most impressive DST I was involved with was 2003 in Libya, an exploration well 20km east of an already very productive field. And we hit 'pay' bigtime. A funny thing about that which I remember well was that I'd chosen the bit from a vast 'bitstore' in a 40ft container, because it was an orphan. A freebie from a fledgeling outfit called UKBits, and it looked like a truncated rugby ball. And boy, did it work!
Anyway, we knew the well was a winner, and proceeded to DST. And Wintershall (the operator I was consulting for) decided to do a 'green' DST, and got in an offshore-style 'clean burn' flareboom, so it wouldn't be smokey. First time anyone had been so pernickety in that country. Usually the DST setup is just 300 yards of 5" drillpipe laid downstream from the test-spread to the flarepit, and the heck with the smoke. Whereas we not only had to lay the Dp, but also a waterline alongside to feed to the 'offshore-style' burner, so the water (under pressure) would vaporise with the heat, combine with unburnt carbon, and thus produce no smoke.
Complicated.
Anyway, the well was a whopper.
The line from the test spread to the burner was (as usual) 5" Dp, slightly trenched, but nevertheless pinned in place by laying the rig's drillcollars across to stop any movement, or at least damp it. 'Drillcollars' are heavy tubulars, weighing a few tons apiece.
My wellsite office / sleeper was 100 yards from the rig itself. The test spread just in front of the rig, and the line to the flare heading off in the other direction. So essentially, my bed (when I found the time to sleep, or was inclined to do so) was 400 yards from the flare itself. And my 'sleeper' was heavily soundproofed: Wintershall didn't cut corners on such things.
'Running the show' (other than the crews) were just three people: the company's head petrophysicist, myself, and the test Supervisor. A nice tight show.
Under test, we never went to 'full open' (one inch!) choke, but decided 3/4" was enough, with the well running at 8500 bbl/day. Because it wasn't the noise, but the ground shaking which worried us. And the possibility of the flare-line (despite the DC's holding it down getting loose and whipping around like an out-of control garden hose. And we didn't want things like the derrick-lights getting rattled-loose and breaking on the rig.
Google 'Nafoora oilfield'. A major FB producer. Ours was Nafoora West.
Happy days.