Definition - What does Core Testing mean?
Core Testing is the testing of a rock sample also known as core by the geologists and scientists to determine the rock permeability, and to know whether the flow of fluids (crude oil and water), and gases through the oil reservoir will be good or bad. Core Testing is also known as Core Flooding Test, which is one of the methods of formation testing.
Petropedia explains Core Testing
Core Testing is conducted by collecting core samples from the drilling site and then analyzing them to determine porosity, rock permeability and the capability of hydrocarbons to flow effectively from the reservoir once a drilled well is operational. Core Testing is conducted in the laboratories in which a setup known as Core Flooding Test Setup is created for testing. In this test setup, the core sample is kept on a core holder, and the outer surface of this core holder is pressurized so that force is applied on the core sample. This situation depicts the similar pressurized condition on rock reservoir in actual operating conditions. When load or stress is applied on the core sample, the core’s permeability to fluids is affected which is measured and recorded. A test fluid is then pumped through the stressed core and the pressure drop and flow rate of the test fluid is measured and recorded. From this test, the resistance to the flow of hydrocarbon from the actual rock bed is evaluated.