Experimental foam incluence evaluation
With decreasing pressure in older gas
wells, produced water or condensate can
no longer be entrained by the gas flow.
These liquids accumulate at the bottom
of the gas well which reduces the flow
of gas or even stops it completely.
One of the most promising solutions is the
use of foam agents (surfactants). By the
use of foam agents, the water can more
easily carried out with the gas flow.
- Different suppliers use different tests
to select foaming agents. Therefore it is
difficult to compare the test results and
to select the appropriate foam agents
by gas producers.
- The predictive value of these tests
in relation to the expected impact
on production in reality is low.
- Quantities and dosing methods for
foams are determined by ‘trial and
error’. This is particularly undesirable in
offshore situations, where the discharge
of waste streams containing oil and/or
foam agents is bound to strict rules.
To develop an industry standard for
the selection of foam agents whereby:
– Consistency exists with the results
– it is possible to compare different foam
agents with each other.