CN109772104B - Hydrogen sulfide absorbent for acid washing and use method thereof - Google Patents
Hydrogen sulfide absorbent for acid washing and use method thereof Download PDFInfo
- Publication number
- CN109772104B CN109772104B CN201910126981.7A CN201910126981A CN109772104B CN 109772104 B CN109772104 B CN 109772104B CN 201910126981 A CN201910126981 A CN 201910126981A CN 109772104 B CN109772104 B CN 109772104B
- Authority
- CN
- China
- Prior art keywords
- hydrogen sulfide
- acid
- absorbent
- sulfide absorbent
- bottle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses a hydrogen sulfide absorbent for acid washing and a using method thereof, wherein the hydrogen sulfide absorbent for acid washing comprises the following components in percentage by mass: ammonium chloride: urotropine: hydroxyalkyl triazine: peroxide: complexing agent: 37: 18: 1: 7. The absorbent can absorb hydrogen sulfide gas components generated by dissolving sulfide-containing inorganic scale through reaction in the process of well bore or pipeline pickling, prevent the hydrogen sulfide gas components from overflowing and dispersing, and solve the problem of hydrogen sulfide damage in the pickling operation process.
Description
Technical Field
The invention relates to a hydrogen sulfide absorbent for acid washing and a using method thereof, in particular to a hydrogen sulfide absorbent for acid washing of inorganic scale containing sulfide such as a shaft, a pipeline, a well bottom and the like in the petroleum production process and a using method thereof.
Background
In the production process of the Bohai sea oil field, a certain amount of hydrogen sulfide gas is contained or Sulfate Reducing Bacteria (SRB) are usedIn addition, ferrous sulfide scale is easy to deposit and block on the ground flow pipeline and underground, and normal production of the oil field is affected. Acid washing is used as a common descaling measure, one or more acid solutions or acidic mixed solutions are injected into a stratum during acid washing operation, and descaling is accompanied by chemical reaction of FeS +2H+→Fe2++H2S ≠ @. Wherein, the S element is mainly from ferrous sulfide scale deposit, and the ferrous sulfide scale is mainly from SRB bacterial corrosion.
The risk of hydrogen sulfide gas overflow can be generated in the pickling descaling process, so that not only can the corrosion of a pipe column be caused, and the efficiency of treating fluid be reduced, but also more importantly, personal injury and environmental damage can be caused, and a plurality of problems are brought to oil field development and safe production.
At present, hydrogen sulfide absorbents at home and abroad are various in types and varieties, mainly comprise formaldehyde, acrolein, amine salt, triazine, nitrite, biological absorbents and the like, and the absorbents have respective characteristics and have different problems, such as poor absorption capacity and stability, strong toxicity, high material cost and the like.
The invention is named as 'a method for controlling H content' under the application number of CN2010101659462A method for FeS deposition and S deposition in acidification of S gas well is disclosed in Chinese patent, wherein 1.0-3.0 wt% of sulfur control agent and 1.0-3.0 wt% of selective iron ion stabilizer are added into 20-28 wt% of hydrochloric acid solution, and the molecular structure of the sulfur control agent is
Research on sulfur and iron control and acidizing and fracturing technologies in acidizing of gas wells containing hydrogen sulfide (Ministry of Petroleum, TE357.1 2005), in which HA (absorbent) is a compound hydrogen sulfide absorbent and HAs a molecular structure
Can be well dissolved in water and acid liquor system, hydrogen sulfideStrong absorption capacity and good stability.
Foreign publications SPE-106442-MS, Development and field application of a new hydrogen sulfide scavenger for the acid absorption of water-absorber, mention a new hydrogen sulfide absorbent B, the main component of which is alkyltriazine, the molecular structure of which
The addition of the absorbent is 0.5 percent, and the absorbent is added into hydrochloric acid with the concentration of 15 percent, and the product is water-soluble after absorbing hydrogen sulfide.
In the documents, hydrochloric acid is used as an acidizing fluid, an organic amine compound, acrolein or alkyltriazine is used as an acid-washing sulfur control agent, the hydrochloric acid has safety problems of different degrees in storage, transportation and use, has strong corrosivity to offshore platform workover equipment, can complete acid-washing descaling operation by means of matching of special acid-corrosion-resistant construction equipment (such as an acidizing tank, an acidizing pump, an acid-resistant high-pressure pipeline) and the like, and has the problems of large occupied space and high construction cost.
At present, the Bohai sea oil field generally uses an acidification construction scheme of acid liquor and corrosion inhibitor in the descaling and blockage removing operation process, and a certain effect is achieved, but a better hydrogen sulfide absorbent for acid washing is not available. If the oil gas treatment device on the ground is used for absorbing hydrogen sulfide gas, the space of the deck of the platform is limited, the operation cost can be greatly improved, and the device is not suitable for wide popularization and application.
Disclosure of Invention
The invention aims to provide a hydrogen sulfide absorbent for acid washing and a using method thereof, the hydrogen sulfide absorbent has simple formula, no aldehyde substance, small toxicity, simple construction, low cost and easy popularization and use, and can effectively solve the problem of hydrogen sulfide absorption in the acid washing and descaling process in the well repairing operation of the oil field water injection well at present.
The invention relates to a hydrogen sulfide absorbent for acid pickling, which comprises the following components in percentage by mass, namely ammonium chloride, urotropine, hydroxyalkyl triazine, peroxide and a complexing agent, wherein the components are shown in the specification of a mass ratio, and the mass ratio of the hydroxyalkyl triazine to the peroxide to the complexing agent is 37: 18: 1: 7.
A use method of a hydrogen sulfide absorbent for acid washing comprises the following steps:
(1) preparing acid liquor with the mass percentage concentration of 10-15%, adding an acidification corrosion inhibitor into the acid liquor according to the mass volume ratio of the acidification corrosion inhibitor to the acid liquor (0.5-1.0 g) to 100mL, and uniformly stirring to obtain base acid liquor;
(2) adding the hydrogen sulfide absorbent into the base acid liquor according to the mass volume ratio of the hydrogen sulfide absorbent to the acid liquor of 2.0g:100mL, and uniformly stirring to obtain a sulfur-preventing and descaling pickling working solution;
(3) and injecting the sulfur-proof descaling acid washing working solution into the underground descaling position for soaking for more than 3 hours.
Compared with the prior art, the invention has the beneficial effects that:
1. the hydrogen sulfide absorbent for acid washing can absorb hydrogen sulfide gas components generated by dissolving inorganic scales containing sulfides through reaction in the process of shaft or pipeline acid washing, prevent the overflow and dispersion of the hydrogen sulfide gas components, and solve the problem of hydrogen sulfide damage in the process of acid washing operation.
2. The hydrogen sulfide absorbent for acid washing can complex Fe generated in the acid washing process3+、Fe2+And an iron ion complex is formed, so that secondary precipitation of iron ions is prevented, and pollution damage of the well bore acid washing operation to a reservoir stratum is eliminated.
3. According to the application method of the hydrogen sulfide absorbent for acid washing, the used acid solution can be hydrochloric acid solution, sulfamic acid, citric acid or composite acid solution consisting of the hydrochloric acid solution, the sulfamic acid and the citric acid, and the application range is wide.
4. The hydrogen sulfide absorbent for acid washing and the using method thereof solve the problems of hydrogen sulfide absorption and iron ion stabilization in the process of pickling the sulfide-containing inorganic scale in mineshafts, pipelines, shaft bottoms and the like in the process of petroleum production, and provide a safe and effective hydrogen sulfide protection method and means for cleaning operations of a Bohai sea oil field sulfide-containing inorganic scale water injection well and an oil well pipe column.
Drawings
Fig. 1 shows a conventional hydrogen sulfide absorption effect evaluation device.
Detailed Description
The invention is further illustrated below with reference to the accompanying drawings. The examples are intended to better enable those skilled in the art to better understand the present invention and are not intended to limit the present invention in any way.
A hydrogen sulfide absorbent for pickling is prepared from ammonium chloride, urotropine, hydroxyalkyl triazine, peroxide, complexing agent (37: 18: 1: 7) through proportional mixing.
In the present invention, the peroxide is any one of ammonium persulfate, potassium persulfate, sodium persulfate, or sodium percarbonate.
The complexing agent is aminocarboxylate, such as trisodium nitrilotriacetate (NTA-3Na), ethylene diamine tetraacetic acid salt (EDTA-4Na or EDTA-2Na), Diethylenetriamine Pentacarboxylate (DPTA), tetrasodium Iminodisuccinate (IDS), etc.
A use method of a hydrogen sulfide absorbent for acid washing comprises the following steps:
(1) preparing acid liquor with the mass percentage concentration of 10-15%, adding an acidification corrosion inhibitor into the acid liquor according to the mass volume ratio of the acidification corrosion inhibitor to the acid liquor (0.5-1.0 g) to 100mL, and uniformly stirring to obtain base acid liquor;
(2) adding the hydrogen sulfide absorbent into the base acid liquor according to the mass volume ratio of the hydrogen sulfide absorbent to the acid liquor of 2.0g:100mL, and uniformly stirring to obtain a sulfur-preventing and descaling pickling working solution;
(3) injecting the sulfur-proof descaling acid-washing working solution into an underground descaling position to soak for more than 3 hours;
the acid solution is hydrochloric acid solution or composite acid solution consisting of citric acid and sulfamic acid.
The pickling corrosion inhibitor is a conventional aldehyde ketone amine or imidazoline acidizing corrosion inhibitor, is commercially available and can be purchased for use.
The position and the dosage of the sulfur-proof descaling acid washing working solution for injecting into the well for descaling can be determined according to specific experiments.
Comparative example: referring to FIG. 1, the hydrogen sulfide absorption effect evaluation apparatus is divided into three parts, namely, a reaction flask 1 is filled with acidReacting the liquid, ferrous sulfide (or a spot sulfur-containing scale sample), a hydrogen sulfide absorbent and an acid pickling corrosion inhibitor to generate hydrogen sulfide, wherein a part of the hydrogen sulfide is absorbed and a part of the hydrogen sulfide overflows from a reaction bottle; the absorption bottle 2 is filled with hydrogen sulfide absorbent solution, and the overflowed part H2S enters an absorption bottle and is absorbed by the absorbent; the pump-suction type hydrogen sulfide detector 3 can respectively detect the concentration of the hydrogen sulfide overflowing from the reaction bottle 1 and the concentration of the hydrogen sulfide in the gas after being absorbed by the absorption bottle 2.
The experimental method is as follows:
1. connecting experimental equipment in sequence according to a diagram 1, and connecting a reaction bottle, an absorption bottle and a pump-suction type hydrogen sulfide detector;
2. 200mL of hydrochloric acid solution with the mass percentage concentration of 15% is filled in a reaction bottle 1, a hydrogen sulfide absorbent with the mass volume ratio of 2.0g:100mL to the hydrochloric acid solution and an imidazoline acidizing corrosion inhibitor with the mass volume ratio of 1g:100mL are added in the 15% hydrochloric acid solution, then a certain amount of ferrous sulfide powder or field scale sample is added, a bottle cap is covered for timing reaction, and the reaction is used for generating hydrogen sulfide and absorbing the hydrogen sulfide;
3. 400mL of 200g/L sodium hydroxide solution is filled in the absorption bottle 2 and is used for absorbing hydrogen sulfide gas overflowing from the reaction bottle 1; because the reaction bottle 1 is provided with the hydrogen sulfide absorbent for acid washing, hydrogen sulfide generated in the reaction process is firstly absorbed in a liquid phase, but partial hydrogen sulfide possibly still overflows, and the overflowed hydrogen sulfide enters the absorption bottle 2 and is secondarily absorbed by a sodium hydroxide solution;
4. reacting for 4 hours in a timing manner, opening a connecting valve between the reaction bottle 1 and the hydrogen sulfide detector 3, closing a connecting valve between the reaction bottle 1 and the absorption bottle 2, opening the hydrogen sulfide detector 3, and recording the concentration data A1 of hydrogen sulfide overflowing from the reaction bottle 1 after 10 minutes;
5. and (3) after reading is finished, opening a connecting valve between the reaction bottle 1 and the absorption bottle 2, opening a communicating valve between the absorption bottle 2 and the hydrogen sulfide detector 3, opening the hydrogen sulfide detector 3, recording overflowing hydrogen sulfide concentration data A2 in the absorption bottle after 10 minutes, and completely absorbing the residual hydrogen sulfide gas.
The results are shown in Table 1
As can be seen from the data in Table 1, the concentration of hydrogen sulfide gas after the acid solution without the hydrogen sulfide absorbent is reacted is greater than 100.0ppm, and no hydrogen sulfide gas is generated by adding the formaldehyde solution or the glyoxal solution, but white precipitate is generated. Formaldehyde and glyoxal have good hydrogen sulfide absorption effect, and the reaction mechanism is
However, the aldehydes have strong pungent odor and are strongly carcinogenic, which is the weakest point of the aldehydes as hydrogen sulfide absorbents and is not recommended to be used.
The concentration of hydrogen sulfide gas after the reaction by taking the complex iron as an absorbent is 1.7ppm, and the mechanism of hydrogen sulfide removal is H2S is Fe in solution3+Complex of (3) Fe3+Reduction of Ln to Fe2+Ln，H2S is oxidized into elemental sulfur. The hydrogen sulfide absorbent has the characteristics of higher absorption efficiency under a high-concentration condition and low absorption efficiency when the addition amount is low. If complex iron is used as an absorbent, a large amount of iron ions are introduced, iron ion precipitates are easily formed in the water well cleaning process to block the stratum, and the complex iron cannot be used as a hydrogen sulfide absorbent for acid cleaning.
Fe3+Ln+H2S→Fe2+Ln+S↓+2H+
And the concentration of the hydrogen sulfide is 2.6ppm after the hydrogen sulfide absorbent is added for reaction, the addition amount is minimum, the absorption rate is highest, and secondary precipitation is not generated.
Example 1
1) The experimental device is connected according to the diagram 1;
2) opening the caps of the reaction bottle 1 and the absorption bottle 2;
3) weighing 4.0g of hydrogen sulfide absorbent for pickling, which is composed of ammonium chloride, urotropine, hydroxyalkyl triazine, ammonium persulfate and tetrasodium iminodisuccinate in a mass ratio of 37: 18: 1: 7, and putting the hydrogen sulfide absorbent for pickling into a reaction bottle, wherein the mass-volume ratio of the hydrogen sulfide absorbent to the acid liquor is 2.0g/100 mL; weighing 1.0g of imidazoline acidizing corrosion inhibitor, and putting the imidazoline acidizing corrosion inhibitor into a reaction bottle, wherein the mass volume ratio of the imidazoline acidizing corrosion inhibitor to the acid liquor is 0.5g/100 mL; 400mL of sodium hydroxide solution with the concentration of 200g/L is placed into the absorption bottle and is used for absorbing hydrogen sulfide gas overflowing from the reaction bottle;
4) measuring 200mL of a composite organic acid solution containing 7.5 mass percent of citric acid and 7.5 mass percent of sulfamic acid, and injecting the composite organic acid solution into a reaction bottle 1;
5) weighing 0.2g of underground ferrous sulfide-containing scale sample, putting into a reaction bottle, and covering the reaction bottle 1 and the absorption bottle 2;
6) reacting for 4 hours in a timing manner, and observing a reaction result;
7) opening a connecting valve between the reaction bottle 1 and the hydrogen sulfide detector 3, closing the connecting valve between the reaction bottle 1 and the absorption bottle 2, opening the hydrogen sulfide detector 3, and recording the concentration data A1 of hydrogen sulfide overflowing from the reaction bottle 1 after 10 minutes;
8) after the reading is finished, opening a connecting valve between the reaction bottle 1 and the absorption bottle 2, opening a communicating valve between the absorption bottle 2 and the hydrogen sulfide detector 3, opening the hydrogen sulfide detector 3, recording overflowing hydrogen sulfide concentration data A2 in the absorption bottle after 10 minutes, and completely absorbing the residual hydrogen sulfide gas;
9) the experimental results are shown in table 2;
TABLE 2 hydrogen sulfide absorption rate for downhole sour scale sample pickling
| Sample (I) | Addition amount, g/100mL | A1,ppm | A2,ppm |
| Blank space | 0 | ＞100 | 0 |
| Hydrogen sulfide absorbent | 2 | 1.7 | 0 |
Example 2
1) The experimental device is connected according to the diagram 1;
2) opening the caps of the reaction bottle 1 and the absorption bottle 2;
3) weighing 4.0g of hydrogen sulfide absorbent for acid washing, which is composed of ammonium chloride, urotropine, hydroxyalkyl triazine, potassium persulfate and trisodium nitrilotriacetate in a mass ratio of 37: 18: 1: 7, and placing the hydrogen sulfide absorbent for acid washing into a reaction bottle, wherein the mass-volume ratio of the hydrogen sulfide absorbent to the acid liquor is 2.0g/100 mL; weighing 1.6g of aldehyde ketoamine acidizing corrosion inhibitor, and putting the aldehyde ketoamine acidizing corrosion inhibitor into a reaction bottle, wherein the mass-to-volume ratio of the aldehyde ketoamine acidizing corrosion inhibitor to the acid liquor is 0.8g/100 mL; 400mL of 200g/L sodium hydroxide solution is placed into the absorption bottle and is used for absorbing hydrogen sulfide gas overflowing from the reaction bottle;
4) measuring 200mL of a composite organic acid solution containing 10% by mass of citric acid and 5% by mass of sulfamic acid, and injecting the composite organic acid solution into a reaction bottle 1;
5) weighing 0.2g of underground sulfur-containing scale sample, putting into a reaction bottle, and covering the reaction bottle 1 and the absorption bottle 2;
6) reacting for 3.5 hours in a timing manner, and observing a reaction result;
7) opening a connecting valve between the reaction bottle 1 and the hydrogen sulfide detector 3, closing the connecting valve between the reaction bottle 1 and the absorption bottle 2, opening the hydrogen sulfide detector 3, and recording the concentration data A1 of hydrogen sulfide overflowing from the reaction bottle 1 after 10 minutes;
8) after the reading is finished, opening a connecting valve between the reaction bottle 1 and the absorption bottle 2, opening a communicating valve between the absorption bottle 2 and the hydrogen sulfide detector 3, opening the hydrogen sulfide detector 3, recording overflowing hydrogen sulfide concentration data A2 in the absorption bottle after 10 minutes, and completely absorbing the residual hydrogen sulfide gas;
9) the experimental results are shown in Table 3;
TABLE 3 absorption rate of hydrogen sulfide after ferrous sulfide acid washing
| Sample (I) | Addition amount, g/100mL | A1,ppm | A2,ppm |
| Blank space | 0 | ＞100 | 0 |
| Hydrogen sulfide absorbent | 2 | 2.2 | 0 |
Example 3
1) The experimental device is connected according to the diagram 1;
2) opening the caps of the reaction bottle 1 and the absorption bottle 2;
3) weighing 0.2g of analytically pure ferrous sulfide and putting into a reaction bottle;
4) weighing 4.0g of hydrogen sulfide absorbent for acid washing, which is composed of ammonium chloride, urotropine, hydroxyalkyl triazine, sodium persulfate and ethylene diamine tetraacetate according to the mass ratio of 37: 18: 1: 7, and putting the hydrogen sulfide absorbent for acid washing and the acid liquor into a reaction bottle, wherein the mass-volume ratio of the hydrogen sulfide absorbent to the acid liquor is 2.0g/100 mL; weighing 2.0g of aldehyde ketoamine acidizing corrosion inhibitor, and putting the aldehyde ketoamine acidizing corrosion inhibitor into a reaction bottle, wherein the mass-to-volume ratio of the aldehyde ketoamine acidizing corrosion inhibitor to the acid liquor is 1.0g/100 mL; figure 2-400 mL of sodium hydroxide solution of 200g/L is put into an absorption bottle and is used for absorbing hydrogen sulfide gas overflowing from the reaction bottle;
5) measuring 200mL of 10% hydrochloric acid solution with mass concentration, and injecting the hydrochloric acid solution into a reaction bottle 1;
6) weighing 0.2g of analytically pure ferrous sulfide, putting into a reaction bottle, and covering the reaction bottle 1 and the absorption bottle 2;
7) reacting for 4 hours in a timing manner, and observing a reaction result;
8) opening a connecting valve between the reaction bottle 1 and the hydrogen sulfide detector 3, closing the connecting valve between the reaction bottle 1 and the absorption bottle 2, opening the hydrogen sulfide detector 3, and recording the concentration data A1 of hydrogen sulfide overflowing from the reaction bottle 1 after 10 minutes;
9) after the reading is finished, opening a connecting valve between the reaction bottle 1 and the absorption bottle 2, opening a communicating valve between the absorption bottle 2 and the hydrogen sulfide detector 3, opening the hydrogen sulfide detector 3, recording overflowing hydrogen sulfide concentration data A2 in the absorption bottle after 10 minutes, and completely absorbing the residual hydrogen sulfide gas;
10) the results are shown in Table 4;
TABLE 4 absorption rate of hydrogen sulfide after ferrous sulfide acid washing
| Sample (I) | Addition amount, g/100mL | A1,ppm | A2,ppm |
| Blank space | 0 | ＞100 | 0 |
| Hydrogen sulfide absorbent | 2 | 2.7 | 0 |
Example 4
1) The experimental device is connected according to the diagram 1;
2) opening the caps of the reaction bottle 1 and the absorption bottle 2;
3) weighing 0.2g of analytically pure ferrous sulfide and putting into a reaction bottle;
4) weighing 4.0g of hydrogen sulfide absorbent for acid washing, which is composed of ammonium chloride, urotropine, hydroxyalkyl triazine, sodium persulfate and ethylene diamine tetraacetate according to the mass ratio of 37: 18: 1: 7, and putting the hydrogen sulfide absorbent for acid washing and the acid liquor into a reaction bottle, wherein the mass-volume ratio of the hydrogen sulfide absorbent to the acid liquor is 2.0g/100 mL; weighing 2.0g of imidazoline acidizing corrosion inhibitor, and putting the imidazoline acidizing corrosion inhibitor into a reaction bottle, wherein the mass volume ratio of the imidazoline acidizing corrosion inhibitor to the acid liquor is 1.0g/100 mL; figure 2-400 mL of sodium hydroxide solution of 200g/L is put into an absorption bottle and is used for absorbing hydrogen sulfide gas overflowing from the reaction bottle;
5) measuring 200mL of 15% hydrochloric acid solution with mass concentration, and injecting the hydrochloric acid solution into a reaction bottle 1;
6) weighing 0.2g of ferrous sulfide-containing scale sample, putting the scale sample into a reaction bottle, and covering the reaction bottle 1 and the absorption bottle 2;
7) reacting for 3 hours in a timing manner, and observing a reaction result;
8) opening a connecting valve between the reaction bottle 1 and the hydrogen sulfide detector 3, closing the connecting valve between the reaction bottle 1 and the absorption bottle 2, opening the hydrogen sulfide detector 3, and recording the concentration data A1 of hydrogen sulfide overflowing from the reaction bottle 1 after 10 minutes;
9) after the reading is finished, opening a connecting valve between the reaction bottle 1 and the absorption bottle 2, opening a communicating valve between the absorption bottle 2 and the hydrogen sulfide detector 3, opening the hydrogen sulfide detector 3, recording overflowing hydrogen sulfide concentration data A2 in the absorption bottle after 10 minutes, and completely absorbing the residual hydrogen sulfide gas;
10) the results are shown in Table 5;
TABLE 5 absorption rate of hydrogen sulfide after ferrous sulfide acid washing
| Sample (I) | Addition amount, g/100mL | A1,ppm | A2,ppm |
| Blank space | 0 | ＞100 | 0 |
| Hydrogen sulfide absorbent | 2 | 2.5 | 0 |
Example 5
1) The experimental device is connected according to the diagram 1;
2) opening the caps of the reaction bottle 1 and the absorption bottle 2;
3) weighing 0.2g of analytically pure ferrous sulfide and putting into a reaction bottle;
4) weighing 4.0g of hydrogen sulfide absorbent for acid washing, which consists of ammonium chloride, urotropine, hydroxyalkyl triazine, sodium percarbonate and diethylenetriamine pentacarboxylate according to the mass ratio of 37: 18: 1: 7, and putting the hydrogen sulfide absorbent for acid washing and the acid liquor into a reaction bottle, wherein the mass-volume ratio of the hydrogen sulfide absorbent to the acid liquor is 2.0g/100 mL; weighing 2.0g of imidazoline acidizing corrosion inhibitor, and putting the imidazoline acidizing corrosion inhibitor into a reaction bottle, wherein the mass volume ratio of the imidazoline acidizing corrosion inhibitor to the acid liquor is 1.0g/100 mL; figure 2-400 mL of sodium hydroxide solution of 200g/L is put into an absorption bottle and is used for absorbing hydrogen sulfide gas overflowing from the reaction bottle;
5) measuring 200mL of hydrochloric acid solution with the mass concentration of 12% and injecting the hydrochloric acid solution into a reaction bottle 1;
6) weighing 0.2g of analytically pure ferrous sulfide, putting into a reaction bottle, and covering the reaction bottle 1 and the absorption bottle 2;
7) reacting for 3.5 hours in a timing manner, and observing a reaction result;
8) opening a connecting valve between the reaction bottle 1 and the hydrogen sulfide detector 3, closing the connecting valve between the reaction bottle 1 and the absorption bottle 2, opening the hydrogen sulfide detector 3, and recording the concentration data A1 of hydrogen sulfide overflowing from the reaction bottle 1 after 10 minutes;
9) after the reading is finished, opening a connecting valve between the reaction bottle 1 and the absorption bottle 2, opening a communicating valve between the absorption bottle 2 and the hydrogen sulfide detector 3, opening the hydrogen sulfide detector 3, recording overflowing hydrogen sulfide concentration data A2 in the absorption bottle after 10 minutes, and completely absorbing the residual hydrogen sulfide gas;
10) the results are shown in Table 6;
TABLE 6 absorption rate of hydrogen sulfide after ferrous sulfide acid washing
| Sample (I) | Addition amount, g/100mL | A1,ppm | A2,ppm |
| Blank space | 0 | ＞100 | 0 |
| Hydrogen sulfide absorbent | 2 | 2.1 | 0 |
While all combinations of the disclosed and disclosed embodiments have been described in detail for purposes of illustration, it will be apparent to those skilled in the art that the disclosed and claimed embodiments can be practiced with modification and alteration of the illustrated devices or the addition or subtraction of certain parts without departing from the spirit and scope of the invention, and that all such similar substitutes and modifications thereto are deemed to be within the spirit, scope and content of the invention.
Claims (7)
1. The hydrogen sulfide absorbent for acid washing is characterized by comprising the following components in percentage by mass: ammonium chloride: urotropine: hydroxyalkyl triazine: peroxide: complexing agent: 37: 18: 1: 7.
2. The hydrogen sulfide absorbent for pickling according to claim 1, characterized in that: the peroxide is any one of ammonium persulfate, potassium persulfate, sodium persulfate or sodium percarbonate.
3. The hydrogen sulfide absorbent for acid washing according to claim 1 or 2, characterized in that: the complexing agent is an amino carboxylate.
4. The hydrogen sulfide absorbent for pickling according to claim 3, characterized in that: the amino carboxylate is one of trisodium nitrilotriacetic acid, ethylene diamine tetraacetic acid salt, diethylenetriamine pentacarboxylate or imino disuccinic acid tetrasodium.
5. A method of using the hydrogen sulfide absorbent for acid washing according to any one of claims 1 to 4, characterized by comprising the steps of:
(1) preparing acid liquor with the mass percentage concentration of 10-15%, and according to the mass volume ratio of the acidification corrosion inhibitor to the acid liquor (0.5-1.0 g): adding an acidizing corrosion inhibitor into the acid liquor in a proportion of 100mL, and uniformly stirring to obtain base acid liquor;
(2) according to the mass volume ratio of the hydrogen sulfide absorbent to the acid liquid of 2.0g: adding a hydrogen sulfide absorbent into the base acid solution in a proportion of 100mL, and uniformly stirring to obtain a sulfur-proof descaling pickling working solution;
(3) and injecting the sulfur-proof descaling acid washing working solution into the underground descaling position for soaking for more than 3 hours.
6. The method of using a hydrogen sulfide absorbent for pickling according to claim 5, wherein: the acid solution is hydrochloric acid solution or composite acid solution consisting of citric acid and sulfamic acid.
7. The method of using the hydrogen sulfide absorbent for acid washing according to claim 5 or 6, characterized in that: the acid pickling corrosion inhibitor is an aldehyde ketone amine or imidazoline acidizing corrosion inhibitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910126981.7A CN109772104B (en) | 2019-02-20 | 2019-02-20 | Hydrogen sulfide absorbent for acid washing and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910126981.7A CN109772104B (en) | 2019-02-20 | 2019-02-20 | Hydrogen sulfide absorbent for acid washing and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109772104A CN109772104A (en) | 2019-05-21 |
| CN109772104B true CN109772104B (en) | 2021-07-20 |
Family
ID=66504570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910126981.7A Active CN109772104B (en) | 2019-02-20 | 2019-02-20 | Hydrogen sulfide absorbent for acid washing and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109772104B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112457833B (en) * | 2020-11-24 | 2022-06-03 | 中国石油天然气股份有限公司 | Hydrogen sulfide inhibitor for oil-water well acidification, preparation method and application thereof |
| US11802246B2 (en) | 2021-03-11 | 2023-10-31 | Baker Hughes Oilfield Operations Llc | Synergistic effects among mercaptan scavengers |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013070385A1 (en) * | 2011-11-10 | 2013-05-16 | General Electric Company | Hexahydrotriazines, synthesis and use |
| CN107892910A (en) * | 2017-11-10 | 2018-04-10 | 中国石油集团渤海钻探工程有限公司 | Inexpensive multifunctional acid liquid system |
| CN109233775A (en) * | 2018-09-25 | 2019-01-18 | 中国石油化工股份有限公司 | A kind of scavenger and preparation method thereof of thick oil thermal extraction sulfur-bearing gas with foreign flavor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1318267A1 (en) * | 1985-10-09 | 1987-06-23 | Всесоюзный Научно-Исследовательский И Проектный Институт По Подготовке @К Транспортировке И Переработке Природного Газа | Adsorbent for cleaning gas from hydrogen sulphide and mercaptan |
| CN104342099A (en) * | 2013-07-24 | 2015-02-11 | 中国海洋石油总公司 | Intensity-controllable jelly profile control and flooding agent for deep profile control and flooding of high water cut oilfields, and its preparation method |
| US10450659B2 (en) * | 2016-04-25 | 2019-10-22 | Ecolab Usa Inc. | Corrosion inhibitor compositions and methods of using same |
-
2019
- 2019-02-20 CN CN201910126981.7A patent/CN109772104B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013070385A1 (en) * | 2011-11-10 | 2013-05-16 | General Electric Company | Hexahydrotriazines, synthesis and use |
| CN107892910A (en) * | 2017-11-10 | 2018-04-10 | 中国石油集团渤海钻探工程有限公司 | Inexpensive multifunctional acid liquid system |
| CN109233775A (en) * | 2018-09-25 | 2019-01-18 | 中国石油化工股份有限公司 | A kind of scavenger and preparation method thereof of thick oil thermal extraction sulfur-bearing gas with foreign flavor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109772104A (en) | 2019-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11236262B2 (en) | Process for removal of hydrogen sulfide in downhole oilfield application | |
| US4830766A (en) | Use of reducing agents to control scale deposition from high temperature brine | |
| US4537684A (en) | Control of metal-containing scale deposition from high temperature brine | |
| CA2720382C (en) | Organic corrosion inhibitor package for organic acids | |
| CN110945098A (en) | Novel modified acid composition as a substitute for conventional acids in the oil and gas industry | |
| US5073270A (en) | Use of reducing agents to control scale deposition from high temperature brine | |
| Mubarak et al. | Internal corrosion in oil and gas wells during casings and tubing: Challenges and opportunities of corrosion inhibitors | |
| CN104629700B (en) | A kind of sulfur elimination for being used to produce water oil well and water-producing gas well | |
| CN109772104B (en) | Hydrogen sulfide absorbent for acid washing and use method thereof | |
| US9254453B2 (en) | Economical method for scavenging hydrogen sulfide in fluids | |
| US3618667A (en) | Removal of dissolved oxygen from water | |
| CN111032091B (en) | Compositions and methods for remediation of hydrogen sulfide and other contaminants in hydrocarbon-based liquids and aqueous solutions | |
| CN114058420B (en) | Hydrogen sulfide remover for oil and gas wells and preparation method thereof | |
| US11136491B2 (en) | Iron sulfide removal in oilfield applications | |
| CN114989858B (en) | Sulfide remover for oil and gas field, preparation method and application thereof | |
| CN107502329B (en) | Eliminating agent for eliminating associated hydrogen sulfide gas in heavy oil thermal recovery | |
| US8574441B2 (en) | Process for removing oxidants from water injected into a subsurface aquifer to prevent mobilization of trace metals | |
| US12084615B2 (en) | Chemical compositions and in-situ methods of using same for remediating sulfur-containing compositions and other contaminants in fluids being extracted from the earth | |
| CN109837546A (en) | Ammonium persulfate corrosion inhibiter and its application used in a kind of offshore oilfield extraction oil-piping | |
| CN113289481B (en) | Oil field acidified hydrogen sulfide remover and use method thereof | |
| US3042609A (en) | Prevention of corrosion in systems containing a corrosive aqueous medium | |
| US9249516B2 (en) | Application of oxygen scavengers to glycol systems | |
| CN114525120A (en) | Non-flowback clean acidification blockage removal working solution and preparation method and application thereof | |
| Martin | Corrosion inhibitors for oil and gas production | |
| US5417845A (en) | Use of decahydro pyrazino [2,3-b] pyrazine for the reduction of the proportion of free or combined hydrogen sulphide present in a fluid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |