An Investigation to Using a Pump for Gas Injection Into a Core

Abstract

Gas injection is one of the methods used in enhanced oil recovery. A pump is usually used for injection of gas into a core in the laboratory. For precision of the experimental results, it is important to keep experimental errors at the minimum value.

In this work, an approach for reduction of one of the most important and effective parameters in the generation of experimental errors during gas injection is presented. One of the main goals of this study is to increase the accuracy of gas injection into a core by using a pump at the experimental scale. In gas injection into a core, if the pump is adjusted to a constant rate, under some conditions, gas injection cannot be conducted with a constant rate and therefore deviation from the constant rate occurs. The value of deviation from the constant rate is different with respect to rock and fluid properties and operating conditions.

In this investigation, experiments were carried out on a carbonate core with low permeability. Experimental data and effective parameters on the error in using a pump for gas injection with a constant rate were studied.