Which of the following is a category of enhanced oil recovery?

Which of the following is a category of enhanced oil recovery?

• A. Chemical Flooding
• B. Primary Recovery
• C. Oil Spills
• D. Hydrogen Storage

Answer: (A)

Enhanced oil recovery uses methods to push more oil out of a reservoir after the natural drive and basic recovery methods have been used. These methods include thermal recovery, gas injection, chemical flooding, and sometimes microbial techniques. Chemical flooding fits as an EOR technique because it injects chemicals into the reservoir to improve oil displacement. Polymers increase the water’s viscosity to improve sweep and reduce fingering; surfactants lower the interfacial tension between oil and water to mobilize trapped oil; alkaline flooding can generate in-situ surfactants to further aid recovery. The other options don’t describe a method for enhancing oil recovery: primary recovery relies on natural reservoir pressure, oil spills are environmental incidents, and hydrogen storage is unrelated to oil recovery.

Enhanced oil recovery uses methods to push more oil out of a reservoir after the natural drive and basic recovery methods have been used. These methods include thermal recovery, gas injection, chemical flooding, and sometimes microbial techniques. Chemical flooding fits as an EOR technique because it injects chemicals into the reservoir to improve oil displacement. Polymers increase the water’s viscosity to improve sweep and reduce fingering; surfactants lower the interfacial tension between oil and water to mobilize trapped oil; alkaline flooding can generate in-situ surfactants to further aid recovery. The other options don’t describe a method for enhancing oil recovery: primary recovery relies on natural reservoir pressure, oil spills are environmental incidents, and hydrogen storage is unrelated to oil recovery.