Nur Wijaya
Texas Tech University, Petroleum Engineering
Pertamina Hulu Energi Offshore North West Java (PHE ONWJ), which is a Production Sharing Contractor of the Government of Indonesia, operates a large number of offshore ESP wells in Java Sea, Indonesia. To stimulate the wells and increase near-wellbore permeability, PHE ONWJ has executed matrix acidizing from 2013 until 2015. During acid deployment, ESP was left in place (downhole). In fact, the ESP was also switched on to unload the spent acid. Given the acid corrosive properties on metals which make up some of the ESP components, a post-stimulation evaluation was conducted in May 2016. This paper attempts to analyze the effect of acid jobs on ESP components integrity and field production performance. Afterwards, this paper discusses some approaches that PHE ONWJ believes to be applicable to observe any need for periodical acid job in the field.