Question: Pls answer No2 A] Why self-potential (SP) can only be used in open (i.e. uncased) holes? B] Sketch three scenarios of subsurface self-potential (SP) log

 Pls answer No2 A] Why self-potential (SP) can only be used

Pls answer No2

A] Why self-potential (SP) can only be used in open (i.e. uncased) holes? B] Sketch three scenarios of subsurface self-potential (SP) log in which: 2. The drilling mud is as saline as the pore-filling water (formation water). 3. The drilling mud is less saline than the pore-filling water (formation water)

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