Gas Processing 101: Sour gas removal

When natural gas comes up with H2S (very toxic gas similar to hydrogen cyanide),
the H2S must be removed before it enters a gathering line.

I have often seen these on the well site (as opposed to closer to the
compressor station) when they are using the big horizontal drilling rigs.

I have commonly seen these big usually red scrubbers on the pad when they are
horizontally drilling. Here's some shots of 'em:



Red stack to the left above, to the right below:



Here's one that clearly says H2S:

The first image I shot.

The last 2 are from here: http://bbxoperating.com/
 (the CEO for this company funded a Geology endowment @ Binghamton Univsity)

On Fri, Mar 15, 2013 at 10:19 AM, LTSnyder@x3ci.com <LTSnyder@x3ci.com> wrote:

Right,

sometimes gas has h2s in it, that makes it 'sour gas', the order of your diagram was wrong because the 'amine' unit (to de-sour) should come BEFORE the dehydrator,  because the amine unit will humidity into the gas stream.  the dehydrator is the last stage immediately before compression, immediately after compression should be some kind of heat exchanger and a point to collect into a condensate tank the heavier btex.  There should be no SO2 in the gas stream exiting the well!  SO2 would indicate that an oxygen source is being introduced to the underground structure.  hope this answers all your questions.  after 9:05 pm today, I can talk as long as you want.

-----Original Message-----
From: William Huston
Sent:  03/15/2013, 03:36
To: Leland T. Snyder
Subject: Leland, what is missing at the well heads or compressors again?


Leland,

2 questions--

1: One time we were talking you said there is *something missing *

that you can't find at either the compressor station or the well head.
Is it SO2 scrubbers? I forget.

2: What's wrong with this diagram again? I think it's that water comes
*after* H2S, right?

H2S is closer to the well-head, and dehydration is closer to the big
compressor.

[image: http://www.theoildrum.com/uploads/44/gas_processing.jpg]

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May you, and all beings
be happy and free from suffering :)
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--
--
May you, and all beings
be happy and free from suffering :)
-- ancient Buddhist Prayer (Metta)

--
--
May you, and all beings
be happy and free from suffering :)
-- ancient Buddhist Prayer (Metta)