Return the skillet to medium-high and add the remaining 2 tablespoons oil.
Add the onion and cook for 3 to 4 minutes.
Add the garlic and oregano and cook until just beginning to brown, 1 minute.
Stir in the wine and any accumulated shrimp juice from the bowl. Cook until nearly evaporated.
Add the chipotle mixture and simmer, stirring, until thick enough to coat a spoon, 10 to 12 minutes.