Case Study: Wellbore Production - Nigeria 2
/An operator in Nigeria needed to increase oil production from a horizontal well drilled in a heavy and viscous, low pressure, oil reservoir. SAS Production Services provided our microemulsion SAS Breaker 162SC chemistry to completely restore the near-wellbore to its original permeability and increase production.
The Problem
The well was drilled in 2014 and oil production had steadily declined to a low value of 98 bbl/d, and total production (oil and water) declined to 110 bbl/d. The operator was looking for a solution to increase the well production and productivity index.
The SAS Solution
The SAS Breaker 162SC was deployed with coil tubing across the reservoir section and allowed to soak for the desired period.
It restored the near-wellbore permeability to its original virgin state by completely removing the damage caused by the drilling mud when the well was drilled, completely removing all the downhole in-situ emulsion that formed during production, and water-wetting all sand grains.
After the soak period, the well was opened and SAS Breaker 162SC had successfully remediated the horizontal well, removing near-wellbore formation damage and increasing production by 802%, from 98 bbl/d to 886 bbl/d.
After the well flowed for one month, the operator turned on a gas lift valve and the oil production further ramped up to 1,290 bbl/d.
To Sum Up...
Increased well production from 98 bbl/d to 886 bbl/d on the same choke size. This represents 802% increase (or 9.02 times the pre-treatment rate).
Total production increased from 110 bbl/d to 1,385 bbl/d.
Productivity index increased, enabling a single gas lift valve to increase oil production to 1,290 bbl/d.
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