Definition - What does Salinity Log mean?
A Salinity Log is a record that contains detailed logged information on the salinity level in a hydrocarbon formation in a reservoir. The primary purpose of salinity logs is to give the information on salinity amount with respect to the amount of oil, gas and water in the reservoir. Such types of logs fall in the category of nuclear well logs.
Petropedia explains Salinity Log
In order to estimate the levels of salinity in a hydrocarbon formation, a nuclear well log is electronically adjusted in a way that enables gamma rays to be emitted and captured when the neutrons are displaced into the ground from the logging tools. When the neutrons in the gamma rays collide, they reflect back on to the surface and are captured and thus, a salinity log is drafted.
The neutrons in the gamma radiations can be detected by three types of detectors used during nuclear logging process. They are: Geiger-Mueller tubes; Proportional counters and Scintillation crystals. The statistical nature of the radioactive decay is considered when interpreting or running the nuclear logs.