Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Flowing Bottomhole Pressure Calculation for a Pumped Well under
  Multiphase Flow   The ability to monitore bottomhole flowing pressure in pumping oil wells
provides important information regarding both reservoir and artificial lift
performance. Converting surface pressure measurements to bottomhole is
currently accomplished by locating the fluid level in the annulus using a sonic
device and then applying a correlation to estimate the density of the gas-cut
liquid column above the perforations. This work proposes a flowing bottomhole
pressure calculation procedure from fluid level measurements. The model is
developed from experimental work and from theoretical arguments. The
calculation procedure developed allows to calculate BHP without shutting the
well, which is common for fluid level casinghead pressure measurements. Also
this method allows to take into account real geometry of the The comparison of
the calculated and measured pump intake pressure shows good accuracy of a
technique. It allows to draw a conclusion for an opportunity to use this method
in practice.

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The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math