Production Enhancement Using Microemulsion Technology in Rona Field

Productivity impairment has been a reoccurring issue within the life cycle of wells globally. This is consequent on various factors which include near wellbore damage. The cause and extent of near wellbore damage for suspected wells, can be understood by evaluating the inflow performance, alongside a systemic understanding of the asset and identification of exceptions from expected trends. Some of the major deterrents to the remediation of near wellbore damage include, poor selection of candidate wells and improper selection/deployment of the remediation technology. Microemulsion fluids have been successfully deployed to effectively manage the persistent problem of near-wellbore damage in Rona Field. This technical paper describes the steps taken to implement a successful rigless microemulsion stimulation job (matrix stimulation) on two wells in Rona Field, which resulted in total production gain of about 1400 BOPD. In the course of this work, a structured candidate screening exercise was carried out on the wells and reservoirs in Rona Field, by leveraging embedded analytics in SEPAL well, reservoir and facility management (WRFM) tool to identify wells with impaired productivity due to formation damage. Thereafter, a carefully designed Microemulsion treatment system having an ultra-low interfacial tension, high solvency and compatibility with the formation fluids was formulated and deployed. The Microemulsion stimulation treatment resulted in approximately 411% and 30% increment in oil rates for RONA-07S and RONA-12S respectively. The lessons learnt, best practices adopted on the execution of the job, together with the operational challenges encountered and how they were resolved will be discussed in this paper.