Determination of bottomhole data based on wellhead data in fontan wells according to mining data

3. Results and discussions:
Data:
⍴_q=0.67 kq/m³
t_a = 7°C+ N⁰ = 7°C+20=27°C
t_q = 27°C +N⁰ =27°C+ 20 =47°C
P_a=100 kq /sm² +N⁰= 100 kq /sm²+20=120 kq /sm²
L=2800 m
1) The relative density of a gas is determined by:

2) Based on the prices received

3) Well bottom pressure is determined by the following formula:

P_q=P_a e^B

P_q=120 2.710.18=143.98

4) To refine the report, the following operation is performed:

P_or=P_a( )

P_or=120( )=131.99

5) According to the obtained P_or, the pressure brought by knowing T_or is determined again:

P’_gət = P’_gət = =2.77

T’_gət T’_gət

6) Z’_or is calculated based on the calculated values:

Z’_or=1-10-2 (0.76 T’³_gət-9.36 T’_gət+13 ) (8-P_gət) P_gət

Z’_or=1-

7) Now let's calculate the top parameter:

B’=

B’=

8) Based on these values, the well bottom pressure is determined:

P’_q= P_a e^B’

P’_q= 120 0.18=143.18

Tq	Ta	Pböh	Tböh	⍴hava	e	⍴q	t^0	tq	Pa
356	316	47.6	218.37	1.293	2.71	0.67	27	47	120

L	Tor	Tgət	Zor	⍴	B	Pq	Por	Pgət	P^’q
2800	335.6	1.53	0.81	0.51	0.18	143.98	131.99	2.52	143.18

4. Conclusion:
1. In order to control the wells, it is necessary to constantly measure the bottom pressure in them. However, since the bottom pressure in gas wells is very large, it is difficult to drop a depth manometer to the bottom of the well. Therefore, to consider this issue, it is more appropriate to use the reporting method instead of a downhole manometer. This issue was considered in the considered case.
2. According to the given methodology, the well bottom pressure of the gas well can be determined in the static case at the given pressure and temperature.
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