What Are SG Units? Oil & Gas Industry Explained

AI Thread Summary
SG units, or specific gravity units, are used in the oil and gas industry to express stresses and pressures in relation to the density of water. In this context, values range from 0.4 s.g. for cohesive rock strength to 1.88 s.g. for overburden stress at depths of 1.2 km. The discussion highlights the importance of understanding these units for accurate modeling of sand production and wellbore collapse. Users confirmed that while calculations in Pascals yield correct results, it is essential to be aware of the conversion factors when working with SG units. Understanding these units is crucial for effective analysis in the oil and gas sector.
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Hi all,

I am currently trying to understand a paper which presents a model for sand production and wellbore collapse in the oil&gas industry.

The paper refers to stresses and pressure in "s.g." instead of Pa or other pressure/stress units... values tend to range from 0.4 s.g. for cohesive rock strength to 1.88 s.g. overburden stress at 1.2km depth.

Anybody knows what those units are ? I seem to get correct values when inputting my own data in Pa. But I wanted to make sure I wasn't missing out a conversion factor.

Thank you
 
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