Patent ID: 11873446
Assignee: THIRD WAVE PRODUCTION, LLC
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C  E

Claim 0:
1. A method of injecting surfactants into an oil well, comprising:
injecting a non-ionic surfactant solution into a reservoir formation, wherein the non-ionic surfactant solution comprises one or more non-ionic surfactants dissolved in a brine solution, wherein the surfactant solution exhibits a cloud point temperature in formation brine that is greater than but within 20 degrees Fahrenheit of the temperature of the reservoir formation; and
altering the wettability of a rock surface of a reservoir rock core sample from the reservoir formation to be water wet based on the injected surfactant solution, wherein the water-wet rock surface is indicated by a contact angle measurement at reservoir temperature of a reservoir oil droplet on the rock surface of less than 75° as measured through the non-ionic surfactant solution.