Echometer Model-H Operating Manual page 45

Visible in the acoustic record previously displayed are several distinct echoes that precede the large echo that is
the most likely echo from the liquid level. These are the echoes from the gas lift mandrels.
In this example note that the software is not flagging the liquid level echo correctly with the vertical dashed
marker (LL) locating it to some feature at 8.500 seconds. This is probably due to interference from the high
frequency noise. So it is also necessary for the user to adjust the liquid level marker by selecting the Adjust
Liquid Level option that displays the following screen:
Using the Interval Right button and the Left/Right arrow keys the liquid level marker is repositioned at the first
break of the liquid level echo (at 10.803 seconds) and then the Accept button is used to return to the manual
fluid level analysis screen.
It is important to note that when using the Toggle Filter feature, the Liquid Level Marker must be picked using
the Unfiltered/Raw data NOT the Low Pass filtered data. Manipulating the Liquid Level while the Low Pass
filter is on will position the Liquid Level Marker incorrectly. This will be apparent if the Liquid Level Marker is
chosen and the Low Pass filter is turned off. Similarly, once the Liquid Level has been selected in the
Unfiltered/Raw shot trace, Toggling the filter to Low Pass may make it seem as though the Liquid Level has been
incorrectly chosen. Do not readjust the Liquid Level marker when the Low Pass filter is turned on.
Echometer Company Phone: (940) 767-4334
Model – H Manual
5001 Ditto Lane Page 45 Fax: (940) 723-7507
Wichita Falls, Texas 76302, U.S.A. E-Mail: info@echometer.com