Surfactant composition and preparation method therefor and application thereof

Patent metadata

Field	Value
Publication number	US-10526528-B2
Application number	US-201415502194-A
Country	US
Kind code	B2
Filing date	Aug 12, 2014
Priority date	Aug 12, 2014
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

This invention relates to a surfactant composition, production and use thereof in tertiary oil recovery. The present surfactant composition comprises a cationic-nonionic surfactant and an anionic surfactant, and exhibits significantly improved interfacial activity and stability as compared with the prior art. With the present surfactant composition, a flooding fluid composition for tertiary oil recovery with improved oil displacement efficiency and oil washing capability as compared with the prior art could be produced.

First claim

The invention claimed is:

1. A surfactant composition, comprising a cationic-nonionic surfactant and an anionic surfactant, wherein a molar ratio of the cationic-nonionic surfactant and the anionic surfactant is 1:0.01-100, and
the cationic-nonionic surfactant is one or more compound having formula

wherein Rh is an optionally substituted C 8-20 linear or branched alkyl, an optionally substituted C 5-50 monocyclic or polycyclic cycloalkyl, an optionally substituted C 2-50 linear or branched alkenyl or an optionally substituted C 6-50 aryl;
N + represents a quaternary nitrogen cation;
R 1 and R 2 are identical to or different from one another, each independently selected from the group consisting of an optionally substituted C 8-20 linear or branched alkyl, an optionally substituted C 5-50 monocyclic or polycyclic cycloalkyl, an optionally substituted C 2-50 linear or branched alkenyl, and an optionally substituted C 6-50 aryl;
the group L 1 represents a single bond, a C 1-10 linear or branched alkylene oxy, a C 2-10 linear or branched alkenylene oxy or a C 6-10 arylene oxy;
plural groups Ru 1 and Ru 2 are identical to or different from one another, each independently represents a C 2-6 linear or branched alkylene;
L 2 represents hydrogen, an optionally substituted C 1-50 linear or branched alkyl, an optionally substituted C 5-50 monocyclic or polycyclic cycloalkyl, an optionally substituted C 2-50 linear or branched alkenyl or an optionally substituted C 6-50 aryl, with the proviso that when L 2 is hydrogen, at least one of R 1 and R 2 is an optionally substituted C 5-50 monocyclic or polycyclic cycloalkyl;
X − represents a halogen ion or hydroxide ion (OH − ),
m1 is a value of from 0 to 100, n1 is a value of from 0 to 100, wherein a sum of m1 and n1 is greater than 0 and not greater than 200, and

wherein, the term “optionally substituted” refers to having an option of containing one or more substituent selected from the group consisting of a C 1-20 linear or branched alkyl, a C 5-10 monocyclic or polycyclic cycloalkyl, a C 2-20 linear or branched alkenyl, and a C 6-20 aryl.

2. A flooding fluid composition for tertiary oil recovery, comprising the surfactant composition according to claim 1 , and water, wherein the surfactant composition accounts for 0.001-10 wt %, relative to a total weight of the flooding fluid composition for tertiary oil recovery as 100 wt %.

3. The flooding fluid composition for tertiary oil recovery according to claim 2 , comprising no inorganic alkali.

4. The surfactant composition according to claim 1 , wherein the molar ratio of the cationic-nonionic surfactant and the anionic surfactant is 1:0.1-10.

5. The surfactant composition according to claim 1 , wherein Rh represents an optionally substituted C 8-20 linear or branched alkyl, an optionally substituted C 5-10 monocyclic or polycyclic cycloalkyl, an optionally substituted C 2-20 linear or branched alkenyl or an optionally substituted C 6-20 aryl.

6. The surfactant composition according to claim 1 , wherein R 1 and R 2 are identical to or different from one another, each independently selected from the group consisting of an optionally substituted C 8-20 linear or branched alkyl, an optionally substituted C 5-10 monocyclic or polycyclic cycloalkyl, an optionally substituted C 2-20 linear or branched alkenyl, and an optionally substituted C 6-20 aryl.

7. The surfactant composition according to claim 1 , wherein L 1 represents a single bond or a C 1-5 linear or branched alkylene oxy.

8. The surfactant composition according to claim 1 , wherein the plural groups Ru 1 and Ru 2 are identical to or different from one another, each independently represents —CH 2 —CH 2 — or —CH 2 —CH(CH 3 )—.

9. The surfactant composition according to claim 1 , wherein L 2 is an optionally substituted C 1-10 linear or branched alkyl, an optionally substituted C 5-10 monocyclic or polycyclic cycloalkyl, an optionally substituted C 2-10 linear or branched alkenyl or an optionally substituted C 6-10 aryl.

10. The surfactant composition according to claim 1 , wherein m1 is a value of from 0 to 50; and n1 is a value of from 0 to 50, with the proviso that the sum of m1 and n1 is greater than 0 and not greater than 100.

11. The surfactant composition according to claim 1 , wherein the anionic surfactant is one or more compound selected from the group consisting of a compound represented by the following formula (I-1),

wherein plural group Ra are identical to or different from one another, each independently selected from the group consisting of an optionally substituted C 1-20 linear or branched alkyl, an optionally substituted C 2-20 linear or branched alkenyl and an optionally substituted C 6-10 aryl;
plural group Ra′ are identical to or different from one another, each independently selected from the group consisting of a single bond, an optionally substituted C 1-10 linear or branched alkylene, an optionally substituted C 2-10 linear or branched alkenylene, carbonyl, an optionally substituted C 1-10 linear or branched alkylene carbonyl and an optionally substituted C 2-10 linear or branched alkenylene carbonyl, the numerical value b represents an integer of from 0 to 3,
wherein the group Y represents N, and a=1,
plural numerical value n′ are identical to or different from one another, each independently represents a value of from 0 to 100,
plural numerical value n″ are identical to or different from one another, each independently represents a value of from 0 to 100,
with the proviso that the sum of all numerical value n′ and all numerical value n″ is greater than 0 and not greater than 100,
plural group L are identical to or different from one another, each independently selected from the group consisting of an optionally substituted C 1-10 linear or branched alkylene and an optionally substituted C 2-10 linear or branched alkenylene, plural group Salt are identical to or different from one another, each independently represents a group represented by the formula -A − (M) r + , wherein the group A − represents a carboxylate ion (COO − ) or a sulfonate ion (SO 3 − ), the group M represents alkali metal, alkaline earth metal or ammonium (NH 4 ), and wherein when the group M represents alkali metal or ammonium, r=1; when the group M represents alkaline earth metal, r=0.5,
the numerical value x′ represents an integer from 1 to 6;
a compound represented by the following formula (I-2),

wherein the group Rb represents an optionally substituted C 1-50 linear or branched alkyl, an optionally substituted C 5-50 monocyclic or polycyclic cycloalkyl or an optionally substituted C 2-50 linear or branched alkenyl,
plural group Rb′ are identical to or different from one another, each independently selected from the group consisting of a single bond and carbonyl,
wherein the group Y represents N, and a=1,
plural numerical value n′ are identical to or different from one another, each independently represents a value of from 0 to 100,
plural numerical value n″ are identical to or different from one another, each independently represents a value of from 0 to 100,
with the proviso that the sum of all numerical value n′ and all numerical value n″ is greater

Assignees

• China Petroleum & Chem Corp
• Shanghai Res Inst Petrochemical Tech Sinopec

Inventors

• Li Yingcheng
• Gu Songyuan
• Zhang Weidong
• Bao xinning
• Sha Ou
• Shen Zhiqin
• Yang Yiqing
• Zhai Xiaodong

Classifications

• C09K8/584 Primary

  characterised by the use of specific surfactants · CPC title

• E21B43/16

  Enhanced recovery methods for obtaining hydrocarbons · CPC title