Laboratory Design and Field Implementation of Microbial Profile Modification Process

Abstract

Summary A microbial profile modification (MPM) process consisting of sequential injection of spores and nutrient was designed and tested for the first time in a carbonate reservoir. An 80-acre, inverted five-spot pattern located in Eunice Monument South Unit in Lea County, New Mexico, was chosen for the field trial. Injection profiles taken before and after the microbial treatment showed that the thief zones were plugged by the biofilm resulting in fluid diversion. Injection profiles also indicated that the biofilm which formed in the reservoir remained stable for more than 8 months. The results of the field trial proved the viability of the MPM technology.