Question: what is isip in fracturing?
Answer: Instantaneous shut-in Pressure, or ISIP, is defined as: ISIP = Final injection pressure - Pressure drop due to friction in the wellbore and perforations or slotted liner. ISIP can be a difficult value to quantify and, as a result, there are numerous ways to obtain an estimate of ISIP in F.A.S.T. WellTest™.