Permeability Estimation From Inflow Data During Underbalanced Drilling
Unlocking Reservoir Insights: Permeability Estimation from Inflow Performance Relationship (IPR) Permeability Estimation From Inflow Data During Underbalanced Drilling Abstract Underbalanced drilling has become increasingly popular as it reduces formation damage caused by fluid invasion during drilling operations. This is particularly important in the case of depleted reservoirs or when horizontal and deviated wells are drilled with long exposure time. As a result of the lower pressure in the wellbore, there is an inflow from the reservoir into the wellbore, which is continuously measured at the wellhead. This inflow carries information about the reservoir. The objective of this paper is to develop a mathematical model and its associated interpretation methods to estimate reservoir permeability and its variation along the length of a horizontal wellbore using the inflow measurements at the wellhead. The traditional methods of pressu...