Method for increasing production and injection of reservoir coupled with flue gas desulfurization and denitrification

Patent metadata

Field	Value
Publication number	US-12221874-B2
Application number	US-202217997106-A
Country	US
Kind code	B2
Filing date	Mar 17, 2022
Priority date	May 8, 2021
Publication date	Feb 11, 2025
Grant date	Feb 11, 2025

Abstract

The last sentence of the abstract has been deleted because it refers to purported merits of the invention. The abstract should not refer to purported merits or speculative applications of the invention and should not compare the invention with the prior art, therefore the abstract has been amended to delete the last sentence by Examiner's amendment.

First claim

What is claimed is:

1. A method for increasing production and injection of a carbonate reservoir coupled with flue gas desulfurization and denitrification, characterized in that:
a desulfurizing and denitrating agent is mixed uniformly with H 2 O 2 solution to prepare a solution, and the solution is sprayed into a flue gas in an opposite direction of flue gas flow to obtain a waste liquor; or O 3 is mixed into the flue gas in the opposite direction of flue gas flow, and simultaneously the desulfurizing and denitrating agent is sprayed into the flue gas to obtain the waste liquor;
when the pH of the solution system reaches 6 to 6.5, the waste liquor is collected as an acid liquor and injected into a reservoir to increase production and injection thereof;
the desulfurizing and denitrating agent comprises Tetrahydroxyethyl Ethylenediamine (THEED) or 2,2′-Bipyridine (bipy) solution with a mass fraction of 0.010% to 0.025%.

2. The method for increasing production and injection of a carbonate reservoir coupled with flue gas desulfurization and denitrification according to claim 1 , characterized in that the desulfurizing and denitrating agent is THEED solution with a mass fraction of 0.020% or bipy solution with a mass fraction of 0.020%.

3. The method for increasing production and injection of a carbonate reservoir coupled with flue gas desulfurization and denitrification according to claim 1 , characterized in that the H 2 O 2 solution has a mass fraction of 10% to 25%.

4. The method for increasing production and injection of a carbonate reservoir coupled with flue gas desulfurization and denitrification according to claim 3 , characterized in that the H 2 O 2 solution has a mass fraction of 15%.

5. The method for increasing production and injection of a carbonate reservoir coupled with flue gas desulfurization and denitrification according to claim 1 , characterized in that a volume ratio of THEED solution with a mass fraction of 0.015% to H 2 O 2 solution with a mass fraction of 15% is 100:1 to 200:1; a volume ratio of bipy solution with a mass fraction of 0.015% to the H 2 O 2 solution with a mass fraction of 15% is 100:1 to 200:1; and a volume ratio of THEED or bipy with a mass fraction of 0.015% to O 3 is 200:3 to 400:3.

6. The method for increasing production and injection of a carbonate reservoir coupled with flue gas desulfurization and denitrification according to claim 5 , characterized in that a volume ratio of the bipy solution with a mass fraction of 0.015% to the H 2 O 2 solution with a mass fraction of 15% is 400:3.

7. The method for increasing production and injection of a carbonate reservoir coupled with flue gas desulfurization and denitrification according to claim 5 , characterized in that a volume ratio of the THEED or bipy with a mass fraction of 0.015% to the O 3 is 100:1.

8. The method for increasing production and injection of a carbonate reservoir coupled with flue gas desulfurization and denitrification according to claim 1 , characterized in that a volume ratio of the THEED solution with a mass fraction of 0.015% to H 2 O 2 solution with a mass fraction of 15% is 75:1.

9. The method for increasing production and injection of a carbonate reservoir coupled with flue gas desulfurization and denitrification according to claim 1 , characterized in that chemical reaction equations of the flue gas desulfurization and denitrification are:

2
⁢

NO
x

+

(

5
-

2
⁢
x

)

⁢

H
2

⁢

O
2

+
bipy

=

[

H
2

⁢
bipy

]

2
+

+

2
⁢

NO
3
-

+

(

4
-

2
⁢
x

)

⁢

H
2

⁢
O

(
1
)

SO
x

+

(

3
-
x

)

⁢

H
2

⁢

O
2

+
THEED

=

[

H
2

⁢
THEED

]

2
+

Assignees

• Univ China Petroleum
• China Shi Da Education Dev Co Ltd

Inventors

• Li Binglin
• Su Yuliang
• Li Binfei
• Zhang Chao
• Wu Shouya
• Li Dongxia
• Wang Wendong
• Li Lei
• Hao Yongmao

Classifications

• E21B41/0057 Primary

  Disposal of a fluid by injection into a subterranean formation · CPC title

• B01D2258/0283

  Flue gases · CPC title

• B01D2257/404

  Nitrogen oxides other than dinitrogen oxide · CPC title

• B01D2257/302

  Sulfur oxides · CPC title

• B01D2251/106

  Peroxides · CPC title