Squeezing salt well
When a hole is drilled through a salt formation, and subsequently casing is set, the salt will gradually move and make contact with the casing. The following paragraphs describe the loading on the casing, and then the capacity of the casing to withstand such loading.
The plastic behaviour of salt formations may result in casing opposite this formation being subjected to the full formation overburden gradient. The value of the overburden gradient will vary with depth but may be as high as 1 psi/ft (22.6 kPa/m). As such, the . . .