Echometer Company
Model – H Manual
Phone: (940) 767-4334
5001 Ditto Lane
Page 78
Fax: (940) 723-7507
Wichita Falls, Texas 76302, U.S.A.
E-Mail:
Rate of Fill-up Graph
The accompanying graph is very useful in liquid level work. The graph indicates the initial rate of fill-up between
casing and tubing in a well for a certain producing rate after the well is shut-in. The chart is read as follows: If
the well produces less than 100 BPD, find the point on the bottom scales corresponding to the producing rate,
read straight up until intersecting the line indicating the pipe sizes, then read to the left to find fill-up rate. For
over 100 BPD, find the point on the bottom scale corresponding to 1/10 of the producing rate, read up until
intersecting the line indicating the pipe sizes, then read to the left to find fill-up rate and multiply by 10. For
example, if a well which has 2” tubing and 5
1
/
2
” casing is producing 60 BPD, the initial fill-up rate is 2.2 feet per
minute. A well with 2
1
/
2
” tubing and 4
1
/
2
” casing, producing at 700 BPD will have an initial fill-up rate of 59 feet
per minute.