Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: What Factors Control Shale Gas Production and Production Decline Trend
  in Fractured Systems: A Comprehensive Analysis and Investigation   A multi-physics model for shale gas production in fractured system, that
couples real gas property, nano-flow mechanism and geomechanics

33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
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The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex