Gamma-Ray-Absorption Techniques Improve Analysis of Core Displacement Tests

Abstract

Summary A gamma-ray-absorption apparatus for monitoring fluid saturations in core displacements is described along with the design principles, their implementation, and an accurate calibration procedure. The apparatus is capable of measuring fluid saturations to ~ 1% in 10 seconds for a 4-mm [0.16-in.] slice of a 38-mm [1.5-in.] -diameter core. The apparatus has been useci to study a variety of displacement processes, including miscible and immiscible. Examples of its application combined with distributed pressure measurements are demonstrated for relative permeability experiments.