Abstract
Drainage Field is the largest active steam flood in the world comprising 7,000 active producing wells, 1,250 steam flood patterns and encompassing 21,000 acres in the Sumatra, Indonesia. The Drainage Field produces 60,000 BOPD and 10,000 optimization jobs are executed annually to support base production. Drainage produces rich carbonate formation water and high asphaltene oil which generates solid deposition inside the wellbore due to high temperature exposure as an impact of steam flooding. Solid deposition extracted into carbonate scale and congealed oil would lead to plugging effect on influx from the reservoir into the wellbore, causing faster production decline. Chemical stimulation well intervention plays main role to improve well productivity by removing solid deposition in the wellbore. Aligning with the massive and aggressive strategy in Drainage Field, there are too many challenges in increasing the execution level like artificial lift assurance, location preparation, resource optimization, plant operation, and sampling analysis capability.
This aggressive scenario requires an excellent and integrated process in delivering effective well intervention program which managed by the following improvements:
Artificial Intelligence (AI) assisted well intervention candidate selection process.
A systematic value-based well intervention schedule and prioritization process.
Artificial lift assurance process.
Effective well site readiness & preparation, include mitigating rainy season challenges.
Comprehensive monitoring dashboard.
Synergic resources support, i.e.: rigs, chemical pump, surface unload tank, vacuum truck, and heavy equipment support.
Pre and post job fluid analysis supported by dedicated lab to optimize chemical unloading process.
An integrated web-based tool to monitor the overall process of chemical stimulation well intervention job.
Lookback process.
Value creation:
Multi-function collaboration effort i.e.: increased success rate by 70 %, reduced suspended execution by 70%, idle time by 30%, increase plant acceptance rate by 60%, and shorten acid unloading time by 50%.
Increased job execution rate to ~200%.
Improve Drainage field base production decline rate, ~15% better.
Provides additional ~3.000 BOPD annual production gain correlates to 77 MMUSD additional revenue.
The effort contributes a significant impact in the way of company should run a massive activity strategy as well as providing an important value to company in optimizing performance.
