US 10,081,604 B1 · Imidazoline compound, mobility control system, plugging agent for gas channeling, and method for carbon dioxide flooding

Abstract

An imidazoline compound, a mobility control system, a plugging agent for gas channelling, and a method for carbon dioxide flooding. The structure of the imidazoline compound is represented by formula (1), in which R is pentadecyl, heptadecenyl, or heptadecyl. A mobility control system that contains the imidazoline compound can interact with carbon dioxide to form a plugging agent for gas channelling, and thereby attains a plugging effect for carbon dioxide channelling in a carbon dioxide flooding process.

Claims6

Dependent claims

A method for carbon dioxide flooding, comprising:

injecting a mobility control system into an oil reservoir, and then injecting carbon dioxide into the oil reservoir for over-displacement;
after the mobility control system forms a plugging agent for gas channelling, further injecting carbon dioxide into the oil reservoir for oil displacement, wherein the mobility control system comprising an imidazoline compound, a mobility control additive, and water, the structure of the imidazoline compound is represented by formula (1):
wherein, R is pentadecyl, heptadecenyl or heptadecyl.

Dependencies are inferred from the claim text.

Facts

Application

15/716,207Filed 26 Sep 2017

Priority

CN 2017 1 056612812 Jul 2017

Granted

25 Sep 2018

Term ends

Not estimatedThe source records don’t support an estimate.

Classification12 codes

C07D 233/14
With substituted hydrocarbon radicals attached to ring nitrogen atoms: radicals substituted by oxygen atoms
C07D 233/20
Having one double bond between ring members or between a ring member and a non-ring member: with substituted hydrocarbon radicals, directly…
C09K 8/594
Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids:…
E21B 43/164
Enhanced recovery methods for obtaining hydrocarbons: injecting CO2 or carbonated water

Imidazoline compound, mobility control system, plugging agent for gas channeling, and method for carbon dioxide flooding

Life of this patent

Imidazoline compound, mobility control system, plugging agent for gas channeling, and method for carbon dioxide flooding

Life of this patent

Abstract

Claims6