CN1458221A - Composite multifunctional chemical unblocking agent - Google Patents

Composite multifunctional chemical unblocking agent Download PDF

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CN1458221A
CN1458221A CN 03129868 CN03129868A CN1458221A CN 1458221 A CN1458221 A CN 1458221A CN 03129868 CN03129868 CN 03129868 CN 03129868 A CN03129868 A CN 03129868A CN 1458221 A CN1458221 A CN 1458221A
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blocking remover
percent
multifunctional
polyoxyethylene
ether
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CN1205299C (en
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易飞
程艳
李成见
何瑞兵
刘文辉
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BOHAI Co CHINA NATIONAL OCEAN PETROLEUM CORP
China National Offshore Oil Corp CNOOC
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BOHAI Co CHINA NATIONAL OCEAN PETROLEUM CORP
China National Offshore Oil Corp CNOOC
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Abstract

The composite multifunctional chemical unblocking agent consists of organic multifunctional unblocking agent in 50-100%, inorganic multifunctional unblocking agent in 5-35% and composite synergist 25-35%. Its main components include C7-C10 aromatic hydrocarbon organic solvent, polyethenoxy ether as surfactant, oil soluble water dispersed polyether demulsifier, T penetrator, polyether wetting agent, mutual solvent, insoluble scale converting agent, composite organic/inorganic acid, cationic polymer as clay stabilizer, water soluble polyether demulsifier, iron ion stabilizer, polyether wetting improver, corrosion assistant, corrosion retardant, cationic polymer as sand stabilizer, etc. The composite multifunctional chemical unblocking agent is injected into treated oil well to produce lasting unblocking effect 10 times that of earth acid.

Description

Composite multifunctional chemical blocking remover
Technical Field
The invention belongs to chemical preparations, and particularly relates to a composite multifunctional chemical blocking remover.
Background
Chemical blockage removal is one of important measures for increasing the yield of an oil well and increasing the injection of a water well, and deep treatment and improvement of the blockage removal effect are important subjects of technical research of a chemical blockage removal process. The conventional chemical blockage removal process technology has limitations of different degrees, and researches show that the chemical blockage removal not only can effectively remove complex blockage of an oil layer caused by various reasons, but also can prevent secondary precipitation generated in a reservoir layer after blockage removal, such as sensitive damage, blockage damage caused by rock framework damage caused by excessive erosion of rock ore, other various damages and the like, and can play the best blockage removal effect. At present, the conventional acidizing plug removal has the problems of excessive near-well oil reservoir rock and ore erosion, poor deep treatment effect, secondary precipitation and the like, and the acidizing plug removal effect is seriously influenced.
Disclosure of Invention
In order to solve the defects in the prior art, the invention develops a composite multifunctional chemical blocking remover which is designed aiming at the organic and inorganic complex blocking conditions of an oil well and a water well and consists of an organic multifunctional blocking remover (BHJ-A), an inorganic multifunctional blocking remover (BHJ-B) and a composite synergist (BHJ-C).
The concrete components and contents are as follows (the following proportions are weight percentages):
BHJ-A organic multifunctional blocking remover:
c7-10 aromatic hydrocarbon organic solvent: 65 to 80 percent
Polyoxyethylene ether surfactant: 1 to 10 percent
Oil-soluble water-dispersible polyether demulsifier: 1 to 5 percent
A T penetrant; 1 to 5 percent
Polyether wetting agents: 1 to 5 percent
Mutual solvent: 5 to 10 percent
The preparation method of the organic multifunctional blocking remover comprises the following steps: sequentially adding a carbon 7-10 aromatic hydrocarbon organic solvent, a polyoxyethylene ether surfactant, an oil-soluble water-dispersible polyether demulsifier, a T penetrant, a polyether wetting agent and a mutual solvent into a stirring tank in proportion at the temperature of 10-50 ℃ and under normal pressure. Stirring for 1-3 hr, and aging for 10-15 hr.
BHJ-B inorganic multifunctional blocking remover:
30% industrial hydrochloric acid: 15-45%:
40-50% of fluoroboric acid: 35-65%:
insoluble scale converting agent (sulfate scale complexing dispersant): 1-5%;
cationic polymer-based clay stabilizer: 1-5%;
water-soluble polyether demulsifier: 1-5%;
retarding corrosion inhibitor: 5-10%:
iron ion stabilizer: 1-6%:
polyether wetting agent improver: 1-5%;
the preparation method of the inorganic multifunctional blocking remover comprises the following steps: under the condition of 10-50 ℃ and normal pressure, a retarding corrosion inhibitor, an iron ion stabilizer, an acid liquid, a polyether wetting improver and a cationic polymer sand stabilizer are sequentially added into a stirring tank in proportion. Stirring for 1-4 hr, and aging for 10-15 hr.
BHJ-C composite synergist:
30% industrial hydrochloric acid: 45-70%;
98% industrial acetic acid: 15-45%;
retarding corrosion inhibitor: 5-10%;
polyether wetting improver: 1-5%;
cationic polymer sand stabilizer (oil layer skeleton stabilizer): 1-5%;
iron ion stabilizer (secondary precipitation preventing agent): 1-6%;
the preparation method of the composite synergist comprises the following steps: under the conditions of room temperature and normal pressure, a retarding corrosion inhibitor, an iron ion stabilizer, a high-efficiency corrosion dissolving agent, a polyether wetting improver, a cationic polymer sand stabilizer, an FC-high-efficiency cleanup additive and a high-efficiency corrosion dissolving agent are sequentially added into a stirring tank according to a proportion. Stirring for 1-4 hr, and aging for 10-15 hr.
Wherein,
the C7-10 aromatic hydrocarbon organic solvent comprises C7 aromatic hydrocarbon, C8 aromatic hydrocarbon, C9 aromatic hydrocarbon and C10 aromatic hydrocarbon; polyoxyethylene ether surfactants include nonylphenol polyoxyethylene (15) ether, nonylphenol polyoxyethylene (10) ether, and the like;
the oil-soluble water-dispersible polyether demulsifier comprises oil-soluble water-dispersible polyether demulsifiers BH-01, BH-04, BH-09 and the like of Bohai sea petroleum extraction engineering technical service company; this demulsifier is already commercially available.
The T penetrating agent comprises polyoxyethylene alkyl alcohol ether-8, polyoxyethylene alkyl alcohol ether-20 and the like;
the polyether wetting agent comprises polyoxyethylene alkyl cresol ether-45, polyoxyethylene alkyl cresol ether-2, polyoxyethylene alcohol ether-10, polyoxyethylene alcohol ether-7, polyoxyethylene alcohol ether-8 and the like;
mutual solvents include ethylene glycol monobutyl ether, diethylene glycol monobutyl ether, and the like; the indissolvable scale transforming agent comprises fluoboric acid, hydrofluoric acid, diethylenetriamine pentaacetic acid, organic polyamine complexing agent and the like;
the cationic polymer clay stabilizer comprises polyamines, polyquaternary ammonium and the like;
the water-soluble polyether demulsifier comprises Bohai sea demulsifiers BH-02, BH-12, BH-169, BX-1 and the like of Bohai sea petroleum extraction engineering technical service company; this demulsifier is already commercially available.
The iron ion stabilizer comprises sodium erythorbate, EDTA tetrasodium salt, nitrilotriacetic acid and the like;
the polyether wetting improver includes polyoxyethylene alkylphenol ether-4, polyoxyethylene alkylphenol ether-10, polyoxyethylene-1,
1-dialkylpropargylether and polyoxyethylene alkylphenylether-7;
the corrosion assistant comprises polyoxyethylene alkyl alcohol ether-20 and polyoxyethylene alkyl alcohol ether-15;
the retarding corrosion inhibitor comprises amphoteric imidazoline retarding corrosion inhibitor, isopropanol, methanol and the like; the cationic polymer sand stabilizer comprises di (polyoxyethylene) alkyl ammonium chloride, cationic polyacrylamide and the like;
the three agents are used in the application with the concentration as follows:
organic multifunctional blocking remover: 50-100% aqueous solution;
inorganic multifunctional blocking remover: 25-35% aqueous solution;
compound synergist: 25-35% aqueous solution.
The method of use is in accordance with the method of use of a conventional blocking remover. The three agents can be injected into the treated oil-water well according to the sequence of the designed slug structure as BHJ-A/BHJ-B/BHJ-C and within the specified concentration range, and the respective effects and the mutual synergistic action are exerted, so that the optimal blockage removing effect is achieved.
The invention has remarkable effects which are specifically shown in the following steps:
1. the series of acidizing blocking remover developed by the invention has good retarding effect which is 10 times of that of the conventional earth acid;
2. the series of acidizing blocking remover developed by the invention has high corrosion rate on organic/inorganic scale, good comprehensive blocking removing performance, certain conversion capacity on insoluble scale and very effective blocking removing operation on oil-water wells;
3. the series of acidizing blocking remover developed by the invention has good comprehensive performance, can effectively protect an oil layer and reduce secondary damage to the oil layer;
4. the developed acidification blocking remover is simple to prepare on site, does not need to add other treating agents on site, and can be used only by adding water to dilute to the designed concentration.
5. The process technology is particularly suitable for deep chemical blockage removal of sandstone reservoirs with high clay content, loose cementation, easy sand production, acid sensitivity and water sensitivity.
Therefore, the composite multifunctional blocking remover is researched and developed, the technical difficulty can be well solved, the blocking remover can be widely applied to oil-water wells of a plurality of oil fields in the Bohai sea, and the obvious effects of increasing production and increasing injection are achieved.
Detailed Description
Example 1:
(1) BHJ-A organic multifunctional blocking remover:
carbon 9 aromatic hydrocarbon: 70 percent of
Nonylphenol polyoxyethylene (15) ether: 5 percent of
Bohai sea petroleum demulsifier BH-01: 2 percent of
Polyoxyethylene alkyl alcohol ether-8: 3 percent of
Polyoxyethylene alkyl alcohol ether-10: 5 percent of
Ethylene glycol monobutyl ether: 8 percent of
Polyoxyethylene alkylphenol ether-7: 7 percent;
(2) BHJ-B inorganic multifunctional blocking remover:
30% industrial hydrochloric acid: 20 percent of
40% fluoroboric acid: 60 percent;
diethylenetriaminepentaacetic acid: 4 percent of
The Bohai sea petroleum BX-1 demulsifier: 3 percent of
Amphoteric imidazoline slow-release corrosion inhibitor: 6 percent of
Poly quaternary amine: 3 percent of
Sodium erythorbate: 3 percent of
Polyoxyethylene alkyl alcohol ether-8: 1 percent;
(3) BHJ-C composite multifunctional synergist:
30% industrial hydrochloric acid: 60 percent of
98% industrial acetic acid: 20 percent;
amphoteric imidazoline slow-release corrosion inhibitor: 6 percent of
Polyoxyethylene alkyl alcohol ether-8: 3 percent;
cationic PAM: 5 percent;
sodium erythorbate: 6 percent.
Example 2:
(1) BHJ-A organic multifunctional blocking remover:
carbon 8 aromatic hydrocarbon: 75 percent of
Nonylphenol polyoxyethylene (10) ether: 8 percent of
Bohai sea petroleum demulsifier BH-09: 1 percent of
Polyoxyethylene alkyl alcohol ether-20: 3 percent of
Polyoxyethylene alkyl alcohol ether-7: 4 percent of
Ethylene glycol monobutyl ether: 6 percent of
Polyoxyethylene alkylphenol ether-7: 4 percent of
BHJ-B inorganic multifunctional blocking remover:
30% industrial hydrochloric acid: 25 percent of
50% fluoroboric acid: 55 percent;
amphoteric imidazoline slow-release corrosion inhibitor: 6 percent;
organic polyamine complexing agent: 4 percent of
The demulsifier for Bohai sea petroleum BH-12: 3 percent of
Cationic polyacrylamide: 3 percent of
Nitrilotriacetic acid: 3 percent of
Polyoxyethylene alkyl alcohol ether-8: 1 percent.
(2) BHJ-C composite multifunctional synergist:
30% industrial hydrochloric acid: 50 percent of
98% industrial acetic acid: 35 percent;
amphoteric imidazoline slow-release corrosion inhibitor: 6 percent;
polyoxyethylene alkyl alcohol ether-8: 4 percent;
cationic PAM: 2 percent;
nitrilotriacetic acid: 3 percent.
Example 3
(1) BHJ-A organic multifunctional blocking remover:
carbon 10 aromatic hydrocarbon: 65 percent of
Nonylphenol polyoxyethylene (10) ether: 10 percent of
Polyoxyethylene alkylphenol formaldehyde resin (BH-01): 2 percent of
Polyoxyethylene alkyl alcohol ether-20: 8 percent of
Polyoxyethylene alkyl alcohol ether-8: 5 percent of
Diethylene glycol butyl ether: 10 percent of
(2) BHJ-B inorganic multifunctional blocking remover:
30% industrial hydrochloric acid: 33 percent
45% fluoroboric acid: 38 percent;
amphoteric imidazoline slow-release corrosion inhibitor: 6 percent;
organic polyamine complexing agent: 4 percent of
The demulsifier for Bohai sea petroleum BH-12: 5 percent of
Cationic polyacrylamide: 3 percent of
Nitrilotriacetic acid: 6 percent of
Polyoxyethylene alkyl alcohol ether-8: 5 percent.
(3) BHJ-C composite multifunctional synergist:
30% industrial hydrochloric acid: 45 percent of
98% industrial acetic acid: 40 percent;
amphoteric imidazoline slow-release corrosion inhibitor: 6 percent;
polyoxyethylene alkyl alcohol ether-8: 4 percent;
cationic PAM: 2 percent;
nitrilotriacetic acid: 3 percent.
Example 4
(1) BHJ-A organic multifunctional blocking remover:
carbon 7 aromatic hydrocarbon: 80 percent of
Nonylphenol polyoxyethylene (10) ether: 1 percent of
Polyoxyethylene alkylphenol formaldehyde resin (BH-01): 5 percent of
Polyoxyethylene alkyl alcohol ether-20: 5 percent of
Polyoxyethylene alkyl alcohol ether-8: 4 percent of
Diethylene glycol butyl ether: 5 percent of
(2) BHJ-B inorganic multifunctional blocking remover:
30% industrial hydrochloric acid: 15 percent of
43% fluoroboric acid: 65 percent;
amphoteric imidazoline slow-release corrosion inhibitor: 10 percent;
organic polyamine complexing agent: 3 percent of
The demulsifier for Bohai sea petroleum BH-12: 1 percent of
Cationic polyacrylamide: 3 percent of
Nitrilotriacetic acid: 1 percent of
Polyoxyethylene alkyl alcohol ether-8: 2 percent.
(3) BHJ-C composite synergist:
30% industrial hydrochloric acid: 70 percent of
98% industrial acetic acid: 15 percent;
amphoteric imidazoline slow-release corrosion inhibitor: 5 percent;
polyoxyethylene alkyl alcohol ether-8: 5 percent;
cationic PAM: 3 percent;
nitrilotriacetic acid: 2 percent.
Example 5
(1) BHJ-A organic multifunctional blocking remover:
carbon 9 aromatic hydrocarbon: 80 percent of
Nonylphenol polyoxyethylene (10) ether: 10 percent of
Polyoxyethylene alkylphenol formaldehyde resin (BH-01): 3 percent of
Polyoxyethylene alkyl alcohol ether-20: 1 percent of
Polyoxyethylene alkyl alcohol ether-8: 1 percent of
Diethylene glycol butyl ether: 5 percent of
(2) BHJ-B inorganic multifunctional blocking remover:
30% industrial hydrochloric acid: 45 percent of
48% fluoroboric acid: 35 percent;
amphoteric imidazoline slow-release corrosion inhibitor: 5 percent;
organic polyamine complexing agent: 5 percent of
The demulsifier for Bohai sea petroleum BH-12: 1 percent of
Cationic polyacrylamide: 3 percent of
Nitrilotriacetic acid: 1 percent of
8.5 percent of polyoxyethylene alkyl alcohol ether.
(3) BHJ-C composite synergist:
30% industrial hydrochloric acid: 40 percent of
98% industrial acetic acid: 45 percent;
amphoteric imidazoline slow-release corrosion inhibitor: 10 percent;
polyoxyethylene alkyl alcohol ether-8: 1 percent;
cationic PAM: 1 percent;
nitrilotriacetic acid: 3 percent.
The construction process only needs to inject the BHJ-A organic multifunctional blocking remover, the BHJ-B inorganic multifunctional blocking remover and the BHJ-C composite multifunctional synergist respectively according to the designed use concentration.

Claims (16)

1. A composite multifunctional chemical blocking remover consists of an organic multifunctional blocking remover, an inorganic multifunctional blocking remover and a composite synergist, wherein the organic multifunctional blocking remover comprises the following components in parts by weight: the concrete components and contents are as follows (the following proportions are weight percentages):
(1) BHJ-A organic multifunctional blocking remover:
c7-10 aromatic hydrocarbon organic solvent: 65 to 80 percent
Polyoxyethylene ether surfactant: 1 to 10 percent
Oil-soluble water-dispersible polyether demulsifier: 1 to 5 percent
T penetrant: 1 to 5 percent
Polyether wetting agents: 1 to 5 percent
Mutual solvent: 5 to 10 percent
(2) BHJ-B inorganic multifunctional blocking remover:
30% industrial hydrochloric acid: 15-45%;
40-50% of fluoroboric acid: 35-65%;
insoluble scale converting agent (sulfate scale complexing dispersant): 1-5%;
cationic polymer-based clay stabilizer: 1-5%;
water-soluble polyether demulsifier: 1-5%;
retarding corrosion inhibitor: 5-10%;
iron ion stabilizer: 1-6%;
polyether wetting agent improver: 1-5%;
(3) BHJ-C composite synergist:
30% industrial hydrochloric acid: 45-70%;
98% industrial acetic acid: 15-45%;
retarding corrosion inhibitor: 5-10%;
polyether wetting improver: 1-5%;
cationic polymer sand stabilizer (oil layer skeleton stabilizer): 1-5%;
iron ion stabilizer (secondary precipitation preventing agent): 1 to 6 percent.
2. The composite multifunctional chemical blocking remover according to claim 1, wherein the use ratio of the organic multifunctional blocking remover, the inorganic multifunctional blocking remover and the composite synergist is as follows:
organic multifunctional blocking remover: 50-100% aqueous solution;
inorganic multifunctional blocking remover: 25-35% aqueous solution;
compound synergist: 25-35% aqueous solution.
3. The composite multifunctional chemical blocking remover according to claim 1, wherein the organic solvent of C7-C10 aromatic hydrocarbon is C7 aromatic hydrocarbon, C8 aromatic hydrocarbon, C9 aromatic hydrocarbon and C10 aromatic hydrocarbon.
4. The chemical multifunctional blocking remover according to claim 1, wherein said polyoxyethylene ether surfactant is polyoxyethylene (15) nonylphenol ether or polyoxyethylene (10) nonylphenol ether.
5. The compound multifunctional chemical blocking remover according to claim 1, wherein the oil-soluble water-dispersible polyether demulsifier is oil-soluble water-dispersible polyether demulsifiers BH-01, BH-04 and BH-09 of the oil extraction engineering service company of the Bohai sea.
6. The compound multifunctional chemical blocking remover according to claim 1, wherein said T penetrating agent is polyoxyethylene alkyl alcohol ether-8, polyoxyethylene alkyl alcohol ether-20.
7. The compound multifunctional chemical blocking remover according to claim 1, wherein the polyether wetting agent is polyoxyethylene alkyl cresol ether-45, polyoxyethylene alkyl cresol ether-2, polyoxyethylene alcohol ether-10, polyoxyethylene alcohol ether-7, polyoxyethylene alcohol ether-8.
8. The composite multifunctional chemical blocking remover according to claim 1, wherein the mutual solvent is ethylene glycol monobutyl ether, diethylene glycol butyl ether.
9. The compound multifunctional chemical blocking remover according to claim 1, wherein the difficult-to-dissolve transforming agent is fluoboric acid, hydrofluoric acid, diethylenetriaminepentaacetic acid, organic polyamine complexing agent.
10. The composite multifunctional chemical blocking remover according to claim 1, wherein said cationic polymer clay stabilizer is selected from the group consisting of polyamines and polyquaternaries.
11. The compound multifunctional chemical blocking remover according to claim 1, wherein the water-soluble polyether demulsifier is a Bohai sea demulsifier BH-02, BH-12, BH-169, BX-1 of Bohai sea oil extraction engineering service company.
12. The compound multifunctional chemical blocking remover according to claim 1, wherein the iron ion stabilizer is sodium erythorbate, tetrasodium EDTA, and nitrilotriacetic acid.
13. The composite multifunctional chemical blocking remover according to claim 1, wherein said polyether wetting improver is selected from the group consisting of polyoxyethylene alkylphenol ether-4, polyoxyethylene alkylphenol ether-10, polyoxyethylene-1, 1-dialkylpropiolic ether and polyoxyethylene alkylphenol ether-7.
14. The compound multifunctional chemical blocking remover according to claim 1, wherein said corrosion aid is polyoxyethylene alkyl alcohol ether-20, polyoxyethylene alkyl alcohol ether-15.
15. The composite multifunctional chemical blocking remover according to claim 1, wherein the retarding corrosion inhibitor is amphoteric imidazoline based retarding corrosion inhibitor, isopropanol and methanol.
16. The composite multifunctional chemical blocking remover according to claim 1, wherein said cationic polymer sand stabilizer is di (polyoxyethylene) alkyl ammonium chloride and cationic polyacrylamide.
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CN1333038C (en) * 2005-10-18 2007-08-22 中国石油大学(华东) High performance sludge inhibitor
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