This question was closed without grading. Reason: Answer found elsewhere
Dec 21, 2011 05:32
12 yrs ago
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English term
live sample
English
Tech/Engineering
Petroleum Eng/Sci
sampling
Hi,
I need to understand what "live" in this case means. It's related to oil and gas industry. The technicans get "live samples" and analyse them to find out the composition and density of the explored liquid. (petrol, gas, etc)
Thank you
I need to understand what "live" in this case means. It's related to oil and gas industry. The technicans get "live samples" and analyse them to find out the composition and density of the explored liquid. (petrol, gas, etc)
Thank you
Responses
4 hrs
a sample of live oil (containing dissolved gas under pressure)
"Live oil" is "oil containing dissolved gas in solution that may be released from solution at surface conditions".
http://www.glossary.oilfield.slb.com/Display.cfm?Term=live o...
It is oil at high pressure. The opposite, naturally, is "dead oil", which is "oil at sufficiently low pressure that it contains no dissolved gas or a relatively thick oil or residue that has lost its volatile components."
http://www.glossary.oilfield.slb.com/Display.cfm?Term=dead o...
Here the term "live sample" is used to mean "sample of live oil":
"Table 1 presents the compositional analysis of Crude A (Dead oil). The system was then cleaned and prepared for Sample B (Crude B) and the experiment was repeated as in Sample A [...]
Table 2 presents the compositional analysis of Crude C (Live oil) [...]
To study the effect of dead oil, deasphalted oil and toluene on live oil asphaltene precipitation onset, the following mixtures were prepared: live oil + 20% dead oil; live oil + 20% deasphalted oil; live oil + 40% deasphalted oil; and live oil + 40% toluene. All these live sample mixtures were prepared at 9000 psia (62 MPa)."
http://brilabs.com/media/34788/shaking_of_fluids_a_new_age_a...
"This paper describes how recombination of a crude oil with various gases [N2, CO2, CH4, C2H6, and dry natural gas (NG)] influences the stability of the concomitant water-in-oil emulsions. The resulting separation behavior for recombined samples is compared with the live crude oil sample for separation pressures equal to the bubble point of the live sample (15 bar) and below (10 and 1 bar)."
Inge Harald Auflem, Arild Westvik, and Johan Sjo¨blom, "Destabilization of Water-in-Crude Oil Emulsions Based on Recombined Oil Samples at Various Pressures", Journal of Dispersion Science and Technology, vol. 24, no. 1, pp. 103–112, 2003
There is much more information in this article on live oil samples.
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Note added at 4 hrs (2011-12-21 09:58:11 GMT)
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In a different context, that of maintenance, a live sample of oil is a sample taken while the machine is in operation, which gives a better indication of the state of the machine than a sample taken when it is at a standstill:
"It is possible to sample fluids when the vehicle is being serviced, or not operational for other reasons. The problem is that this kind of sampling doesn’t give an accurate picture of what’s happening in the field, because the fluids are cold, less viscous and contaminants may have settled.
Live sampling - when the machine is running and up to temperature - gives a totally accurate picture of the state of engine and hydraulic oils. In this state, the fluids are being sampled in actual operating conditions."
http://www.aprs.com.au/australian-mining-news/oil-sampling-a...
There is, perhaps, some connection here, since a live sample in a drilling operation will be a sample of the oil as it actually extracted.
http://www.glossary.oilfield.slb.com/Display.cfm?Term=live o...
It is oil at high pressure. The opposite, naturally, is "dead oil", which is "oil at sufficiently low pressure that it contains no dissolved gas or a relatively thick oil or residue that has lost its volatile components."
http://www.glossary.oilfield.slb.com/Display.cfm?Term=dead o...
Here the term "live sample" is used to mean "sample of live oil":
"Table 1 presents the compositional analysis of Crude A (Dead oil). The system was then cleaned and prepared for Sample B (Crude B) and the experiment was repeated as in Sample A [...]
Table 2 presents the compositional analysis of Crude C (Live oil) [...]
To study the effect of dead oil, deasphalted oil and toluene on live oil asphaltene precipitation onset, the following mixtures were prepared: live oil + 20% dead oil; live oil + 20% deasphalted oil; live oil + 40% deasphalted oil; and live oil + 40% toluene. All these live sample mixtures were prepared at 9000 psia (62 MPa)."
http://brilabs.com/media/34788/shaking_of_fluids_a_new_age_a...
"This paper describes how recombination of a crude oil with various gases [N2, CO2, CH4, C2H6, and dry natural gas (NG)] influences the stability of the concomitant water-in-oil emulsions. The resulting separation behavior for recombined samples is compared with the live crude oil sample for separation pressures equal to the bubble point of the live sample (15 bar) and below (10 and 1 bar)."
Inge Harald Auflem, Arild Westvik, and Johan Sjo¨blom, "Destabilization of Water-in-Crude Oil Emulsions Based on Recombined Oil Samples at Various Pressures", Journal of Dispersion Science and Technology, vol. 24, no. 1, pp. 103–112, 2003
There is much more information in this article on live oil samples.
--------------------------------------------------
Note added at 4 hrs (2011-12-21 09:58:11 GMT)
--------------------------------------------------
In a different context, that of maintenance, a live sample of oil is a sample taken while the machine is in operation, which gives a better indication of the state of the machine than a sample taken when it is at a standstill:
"It is possible to sample fluids when the vehicle is being serviced, or not operational for other reasons. The problem is that this kind of sampling doesn’t give an accurate picture of what’s happening in the field, because the fluids are cold, less viscous and contaminants may have settled.
Live sampling - when the machine is running and up to temperature - gives a totally accurate picture of the state of engine and hydraulic oils. In this state, the fluids are being sampled in actual operating conditions."
http://www.aprs.com.au/australian-mining-news/oil-sampling-a...
There is, perhaps, some connection here, since a live sample in a drilling operation will be a sample of the oil as it actually extracted.
Note from asker:
| Thank you! |
Discussion
-Samples are being taken while drilling (although they wouldn't be "oil" samples)
-Samples are taken during well testing after completion.
-Samples are taken when producing the well in order to monitor what's coming up.
Whatever it is, the fact they call it "live" seems to indicate that the sampling is taking place on site and while something else is happening. But with such little context, it's difficult to say... I hope this was helpful anyway!
Thank you for the response. Actually there isn't too much details. This is all I can provide.
It's in the brief description of a service provided. Live sample/sampling it says.
Yes it's related to liquid, particularly related to oil industry. I believe, samples from oil wells are taken and analyzed to determine the quality and properties of the oil explored.
I want to know in what way the samples are "live".
Giving me the slightest hint would be much appreciated. Thank you for your time.
Also, you say the samples are for liquid, but then you talk about gas. I believe you meant "fluid" instead of "liquid". Please provide with info as accurate as possible so we can help you.
Regards,
YP