Bs & w

[iserlohn99]

salam everyone

i have two questions

what is the BS & W and how we use it is there any documentations about it.

and what is the clean out of well

thanks

[darcyoil]

Hi.

Bs&W= Bottom sediment and water.

In crude oil analysis, we always analyze the sample to determine how much net oil is there. The Bs&W figure, usually reported as a percentage, gives us a quantification of the impurities in the crude. This is important for many reasons: first, the Bs&W percentage reduces the volume of oil you transfer/sell. Secondly, most refineries have cutoff limits of Bs&W, above which (say max 1.2%), they will refuse to accept your crude, or levy high processing charges. Thirdly, the Bs&W figure if high, tells you to wake up and go tweak your dosing/heater-treater settings at your installation so that you don't lose your bonus when the boss finds out!!

[Trostis]

Hi, iserlohn99.

I'm not sure if it's "Bottom Sediments and Water" or "Basic Sediments and Water" but, it's more or less what darcyoil described. Many times it's assumed to be the same as the watercut but, strictly speaking the BS&W also accounts for any other non-oil impurities (sand,...).

Regarding the well clean out, it's the process of removing the foreign fluids (drilling, completion, workover...) from a well and replacing them with clean native reservoir fluids (oil, gas...water); once you produce pure reservoir fluids at surface, the wellbore is assumed to be clean. That's it, more or less.

Regards.

[white hawk]

basic sediment and water = which means the pecentage of water +sediments (clay salts mud additives)
we monitore this number when we want to revive the well after killing it for workover