Enhanced oil recovery (EOR) chip - topconnect
Enhanced oil recovery chips can be used to verify calculation models, providing an optical clear surrogate rock. Known geometrical conditions and optical clear chips create optimal conditions to study physical processes that normally occur inside rock formations.
Enhanced oil recovery chips are available in three designs as listed below and can be supplied with or without a hydrophobic coating.
The optional coating is applied on a best effort base, it is possible that some areas where geometries are not interconnected will stay uncoated.
Physical rock network
This chip is designed by randomly placing rock shaped structures on the chip to resemble the shape that is obtained by cutting rock as accurately as possible. This random structure results in throats and channels between the rock structures. This method of random placement does not give information on throat size distribution. For simulation purposes, the mask (2D) design is available on request. However, experience has taught us that the complexity of this structure makes it challenging to run computer simulations on.
Random network porous structure chip, often used for CEOR and MEOR enhanced oil recovery experiments.
A systematically organized and well-defined rock-pore structure of equally sized pores and channels.
|Unit of measurement||3-Pack|
|Chip material||Borosilicate glass|
|Number of inlets||1|
|Number of outlets||1|
|Supply format & dimensions|
Supplied in black polymer cardtridge (polypropylene). The glass element has a size of 45x15mm.
|EOR information||Additional information on the Uniform, Random and Physical rock network structures.||432 KB||Download|
One simple but very effective way to clean a microchip is to flush an alkaline solution through the channels. A solution of 1 M sodium hydroxide in water works well, but a lower concentration might also be sufficient. If traces of the cleaning solution remain inside the chip after cleaning, rinse with water or ammonia. Note that caustic solutions can cause damage to e.g. the polyimide coating of fused silica capillaries. Further, plastic parts should not be exposed to alkaline solutions.
To remove particulate matter from your chip, a water bath with ultrasonic agitation can be used, preferably while flushing a watery solution through the channels using a Fluidic connection kit.
Glass microchips can be heated (e.g. >400° C) causing any organic material on the glass surface to degrade. Try to use lower temperatures first because burning the content could make it stick. Make sure you only heat the glass chip and not the plastic parts around it.
Concentrated sulfuric acid works well to dissolve organic material, such as fibres, that are difficult to remove with alkaline solutions. Always keep in mind that you are working with extremely corrosive material.
Please note that chips that were coated by Micronit have different guidelines for cleaning!
The EOR chip itself are manufactured from glass an can easily withstand up to 300C. However they are supplied in a black fluidic cartridge. This cartridge can width stand up to 80C.
There’s no sealant used, two layers of glass are fusion bonded together.
The chip can withstand easily up to 100 bar. However the external interfacing is more critical. Our Fluidic Connect holder offers the largest pressure, up to 80 bars (maybe less at elevated temperatures). Please note that the Fluidic Connect holder is a bit more complex in use. You need a bit of feeling to apply not too much force, which might brake the chip, but sufficient to obtain sufficient sealing. It might be necessary to tighten a bit more when pressure and temperature are increased. Please remove the pressure before additional tightening.
The fluidic ports are on positions 3,8
Alignment can be done on positions 2,7 (or 4,9).