Example
(See also Figure 13; viscosity is not shown as it behaves as in the dead oil regime)
PVTO |
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-- Rs P_bp(Rs) Bo(P_bp) mu_o(P_bp) |
/ |
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49.0 |
27.2 |
1.1334 |
1.17 |
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108.6 |
81.6 |
1.1626 |
1.11 |
/ |
167.1 |
136.0 |
1.1906 |
1.06 |
/ |
220.8 |
190.4 |
1.2174 |
1.00 |
/ |
267.2 |
245.0 |
1.2432 |
0.95 |
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-- Subtable for |
undersaturated oil with Rs = 267.2 |
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-- |
Po |
Bo(Po) |
mu_o(P_o) |
|
272.01.2382 0.95
299.21.2332 0.95
326.41.2283 0.95
353.61.2235 0.95
286.7 |
380.8 |
1.2186 |
0.95 |
/ |
Record end |
272.0 |
1.2544 |
0.94 |
/ |
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306.3 |
299.2 |
1.2656 |
0.92 |
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-- Subtable for |
undersaturated oil with Rs = 306.3 |
||||
326.41.2606 0.92
353.61.2555 0.92
380.8 1.2505 0.92 /
/“Empty” record marks end of table
Oil Formation Volume Factor
1,28 |
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1,26 |
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1,24 |
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1,22 |
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1,2 |
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1,18 |
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Bo (P_bp) |
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1,16 |
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Bo (P_o) (1) |
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Bo (P_o) (2) |
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1,14 |
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1,12 |
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0 |
50 |
100 |
150 |
200 |
250 |
300 |
350 |
400 |
P (bars)
Figure 13. Variation of live oil volume factor, below bubble point and two branches above (from example PVTO table)
6. Soil compressibility (PROPS section)
In reservoir simulation soil compaction (which is actually compaction of the pore space) is modelled as a function of fluid pressure, which is a necessary simplification. The simplest available compaction model is to assume linear elasticity, i.e. a constant coefficient of rock compression (similar to the constant water compressibility discussed above), defined with keyword ROCK, with syntax,
ROCK
Pref [bars] Cr [bars-1]
Example
ROCK
--Pref Cr
310.0 5.0e-6 /
37