Very often results from different production chemistry related laboratory analyses are reported to operators as PDF documents. The data is then manually typed or copied by their personnel into other operator specific Excel spreadsheets or databases.
This may cause erroneous data being added into these spreadsheets and databases due to mistyping of values. This can be followed by a risk of misinterpretation and non-optimal decisions. This manual process is also time consuming.
The area above the flowtube in a sub-surface safety valve (DHSV) tends to scale up easily, preventing the valve from closing. This is due to the geometry of this area, and the fact that the sliding motion of the flow tube is sensitive to scale. This will cause production loss due to frequent remedial cycling for cleaning of this surface. In the worst-case scenario, intervention is needed to mechanically clean this area.
Read more in our Field Case (pdf).
The Residual Inhibitor Concentration (RSI) in the produced water phase of an offshore producing oil well in Norway, was closely approaching the critical Minimum Inhibitor Concentration (MIC).
Due to a one-month lead time for mobilizing scale inhibitor for the squeeze operation, the operator was in risk of having to shut the well in.
Read more in our Field Case (pdf).
Even distribution along long horizontal wells or commingled producers, are often challenging to squeeze due to changes in pressure and permeability.
In this field example, the sulphate coverages on the produced water filter samples are very high. This indicate that parts of the well are unprotected, despite the recent squeeze.
Read more in our Field Case (pdf).
An operator in Norway squeezed wells based on the potential for calcium carbonate deposition. The preventive strategy was selected because any scale removal operations would be costly.
Read more in our Field Case (pdf).
Usually, re-squeeze is performed when the back-produced inhibitor concentration (RSI) decline towards the Minimum Inhibitor Concentration (MIC).
However, this strategy will always be uncertain because MIC is measured at lab conditions. The scale inhibitor can also be unevenly distributed along the wellbore and may therefore not prevent scale.
Read more in our Field Case (pdf).