Problem 30. The statement most FALSE about natural gas treating and processing is:
(A) In long distance transmission of sales gas by pipeline, pressure is usually less than 1,000 psig.
(B) A potential cause for treated natural gas “going sour” is too low of an inlet gas rate.
(C) All raw natural gas is fully saturated with water vapor when produced from an...
(D) There are four glycols that are used in removing water vapor from natural gas or in...
This question can be answered quickly knowing the basics of natural gas processing. Or you can quickly glean the answer from HS III, pages 186, 192, and 198. Overall, a pretty easy question, but it can take time if you don't have much experience, or lack the right resources.
Watch the wording like a hawk. It's always best to find a direct quote from an SPE source for these types of problems if the wording seems vague.
8 FAC 1 states 'Sour gas: NG w/ H2S (limit 1 gr/100 scf). ... may be caused by low inlet gas rate.' Also, 'Going Sour causes' no. 8 states 'inlet gas rate too high'. Are both these statements correct? Can you explain the difference between 'going sour' and 'sour gas' and why the causes are different? I'm assuming this is why you stated watch the wording like a hawk. Thank you!
ReplyDeleteBtw for the explanation of "why" a gas might "go sour" during gas treatment vs just being sour check out TS3 P186-193. The Guidebook just lists the reasons themselves (again, just reference not instruction). Note on an exam you can quickly see the page numbers you need.
DeleteWhere do you see this on 8 FAC 1? Mine has nothing about Sour Gas.
Delete8 FAC 1 has some updated in 2018 2nd edition.
Delete8 FAC 1 merely has a list of 9 potential causes from HS3 P192 of "going sour", which just means exceeding H2S sales-gas spec.
ReplyDelete8 FAC 1 does try to cram a TON of info into a small spot...this is helpful to trigger memory on an exam that has a billion odd questions. Just keep in mind it's not for learning the material itself. And it's also for fast page reference so you can find an exact quote.
I remember a PhD BP Simulation engineer once told me bitterly after the PE exam he wasn't sure he got the only simulation question on the PE exam correct. And this is what he did his whole life! He could write the book on simulation...but he wasn't quite sure about the question wording and in the end had to guess. That's what I mean about watching the wording like a hawk. On this question, it each are merely direct quotes from the Guidebook or TS3. If you know the material well or have a Guidebook for quick reference so it triggers your memory, no problem. Otherwise...