Manufacturing mixed wettability surfaces

A method for manufacturing a micromodel with a mixed wettability surface representing a hydrocarbon reservoir, comprising the steps:

• coating a top surface of a hydrophobic substrate with photoresist,
• covering a top of the photoresist with a photomask, wherein the photomask comprises a pattern transparent to UV light,
• exposing the covered top of the photoresist to UV light that changes a chemical property of a region of the photoresist corresponding to the pattern of the photomask,
• removing the photomask,
• removing the region of the photoresist based on the chemical property of the region, wherein the removed region corresponds to the pattern of the photomask,
• depositing a hydrophilic thin-film on top of the substrate, and
• removing a remaining photoresist covered with the hydrophilic thin-film, such that the surface of the hydrophobic substrate is patterned with both a region covered with the hydrophilic thin-film and an uncovered region of the hydrophobic substrate, creating a mixed wettability surface on the hydrophobic substrate that represents the micromodel.

A method for manufacturing a micromodel with a mixed wettability surface representing a hydrocarbon reservoir, comprising the steps:

• depositing a hydrophobic thin-film on a top surface of a hydrophilic substrate,
• coating a top of the hydrophobic thin-film with photoresist,
• covering a top of the photoresist with a photomask, wherein the photomask comprises a pattern transparent to UV light,
• exposing the covered top of the photoresist to UV light that changes a chemical property of a region of the photoresist corresponding to the pattern of the photomask,
• removing the photomask,
• removing a region of the photoresist based on the chemical property of the region, wherein the removed region corresponds to the pattern of the photomask,
• removing the hydrophobic thin-film in the region not covered by photoresist, and
• removing remaining photoresist, such that the surface of the substrate is patterned with both the region covered with the hydrophobic thin-film and an uncovered region of the hydrophilic substrate, creating a mixed wettability surface on the substrate that represents the micromodel.

A method for manufacturing a micromodel with a mixed wettability surface representing a hydrocarbon reservoir, comprising the steps:

• depositing a hydrophilic thin-film on a top surface of a hydrophobic substrate,
• coating a top of the thin-film with photoresist,
• covering a top of the photoresist with a photomask, wherein the photomask comprises a pattern transparent to UV light,
• exposing the covered top of the photoresist to UV light that changes a chemical property of a region of the photoresist corresponding to the pattern of the photomask,
• removing the photomask,
• removing a region of the photoresist based on the chemical property of the region, wherein the removed region corresponds to the pattern of the photomask,
• removing the thin-film in the region not covered by photoresist, and
• removing remaining photoresist, such that the surface of the substrate is patterned with both a region covered with the hydrophilic thin-film and an uncovered region of the hydrophobic substrate, creating a mixed wettability surface on the substrate that represents the micromodel.