5. A single well constant rate pump test was performed in the same southern Spring Valley MX Well. The well was pumped with a design flow of 170 gpm for five days, and drawdown was recorded in the pumping well. The radius of the well casing is 5 inches, and the radius of the well and gravel pack is 7 inches. Drawdown observations are given in the table to the right. Calculate the transmissivity of the well using Theis, Cooper Jacob, or another aquifer test analysis method. Time (minutes) 1 5 10 20 50 70 100 150 200 300 400 500 700 1,000 1,500 2,000 2,400 2,839 Observed Drawdown (ft) 31.9 33.9 34.4 35 35.5 35.6 35.8 36.2 36.4 36.2 36.6 36.6 36.7 36.8 37.4 37.5 37.8 38
5. A single well constant rate pump test was performed in the same southern Spring Valley MX Well. The well was pumped with a design flow of 170 gpm for five days, and drawdown was recorded in the pumping well. The radius of the well casing is 5 inches, and the radius of the well and gravel pack is 7 inches. Drawdown observations are given in the table to the right. Calculate the transmissivity of the well using Theis, Cooper Jacob, or another aquifer test analysis method. Time (minutes) 1 5 10 20 50 70 100 150 200 300 400 500 700 1,000 1,500 2,000 2,400 2,839 Observed Drawdown (ft) 31.9 33.9 34.4 35 35.5 35.6 35.8 36.2 36.4 36.2 36.6 36.6 36.7 36.8 37.4 37.5 37.8 38
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Transcribed Image Text:6.
A single well constant rate pump test was
performed in the same southern Spring Valley MX Well.
The well was pumped with a design flow of 170 gpm for
five days, and drawdown was recorded in the pumping
well. The radius of the well casing is 5 inches, and the
radius of the well and gravel pack is 7 inches.
Drawdown observations are given in the table to the
right. Calculate the transmissivity of the well using
Theis, Cooper Jacob, or another aquifer test analysis
method.
Time (minutes)
1
5
10
20
50
70
100
150
200
300
400
500
700
1,000
1,500
2,000
2,400
2,839
Observed
Drawdown (ft)
31.9
33.9
34.4
35
35.5
35.6
35.8
36.2
36.4
36.2
36.6
36.6
36.7
36.8
37.4
37.5
37.8
38
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