MEG Filtration in the Oil&Gas Upstream Sector

MEG Filtration in the Oil&Gas Upstream Sector

Background:
MEG (Mono Ethylene Glycol) is used as hydrate inhibitor when extracting natural gas from a reservoir. Lean MEG (~90/10 wt% MEG/Water) is injected at the wellheads, where it is mixed with formation water (saturated with formation salts) and later with condensed water through the gas pipeline. When arriving to the slug catchers the Rich MEG (~40-60 wt% MEG, depending on the well and on its age, water to 100%) is taken out and regenerated back to Lean MEG in a regeneration system.

Besides water removal, the regeneration system is responsible for removal of salts, both high soluble (NaCl) and low soluble ones (e.g. CaCO3, Mg(OH)2, pipeline corrosion products like FeS). Accumulation of these salts, especially low soluble ones, may result in major issues in key equipment within the whole MEG loop, thus harming production stability.

Benefits of FUNDABAC®:
DrM filters are ideally suited for the removal of low soluble salts, whose small particle size (down to few μm) together with a possible colloidal-like behavior call for a very efficient separation system. The variation, even significant, in formation water and therefore Rich MEG composition over the whole well life are not an issue due to the high flexibility of DrM filters in operating at varying solid concentrations. The result is a system with a superior reliability, finally allowing full production stability.

In the majority of the cases filter aid is not needed, but when solids composition and process requirements call for it, DrM filters are designed for hassle-free, fully automatic handling.

The possibility of efficiently washing the filter cake minimizes MEG losses and thus allows a dramatic improvement in MEG recovery, whilst the absence of motors or other moving parts results in simple and inexpensive maintenance.

DrM supplies plants with customized design and filter sizing, providing a tailor-made solution to your flow assurance requirements.

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