SIAM DU-1, Руководство по эксплуатации

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Well sounders «DU-1»
APPENDIX 2. Setting Sound Speed Work Sheet
When controlling a level, the operator has an opportunity to select
and install a worksheet of speeds, according to which the device detects the
acoustic wave speed, depending on measured pressure in the annular. Here
can be selected both the sheets from device’s memory and user sheets from
computer database.
Attention! Sound speed in wells even within one field can vary
greatly. Therefore, we strongly suggest to use your own (for your region)
sheet of corrections for a specific field or a pattern of wells within one field
range. The device will show the level, based on the preset sound speed!
General use sheets are recorded in the read-only memory of the
device, obtained from averaged data for respective regions. These sheets
can only be used for a rough estimation of level. They are denoted by the
following conventional codes and names:
Sheet 1 – "Langepas" (for Siberia region);
Sheet 2 – "Tatarstan" (for Tatneft fields).
Besides the mentioned general sheets, user sheets can be recorded
in the device memory, accepted for specific conditions of O&G Production
Divisions, fields, etc. Numbers of user sheets can be from 3 to 99.
Working with a database, including questions on creation and use
of user sheets, is described in the document "Database DB SIAM v2.5.
User Manual", included in the package.