CN112342010A - Polychlorinated ether alcohol self-acid generator and use method thereof - Google Patents
Polychlorinated ether alcohol self-acid generator and use method thereof Download PDFInfo
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Abstract
The invention relates to a polychlorinated ether alcohol self-acid generator and a using method thereof, the polychlorinated ether alcohol self-acid generator comprises polychlorinated ether alcohol, a low-temperature inhibitor and a medium-temperature catalyst and/or a high-temperature accelerator, wherein the polychlorinated ether alcohol is CnClmOxHyWherein n =2-10, m is not less than n and not more than 2n, x =2-10, x is not less than y and not more than 5x, the medium-temperature catalyst is an alkaline compound, the low-temperature inhibitor is a hydrocarbon compound, and the high-temperature accelerator is an organic compound. According to the polychlorinated ether alcohol self-acid generator, the low-temperature inhibitor, the medium-temperature catalyst and/or the high-temperature accelerator are/is added into the polychlorinated ether alcohol, so that the self-acid generation rate of the polychlorinated ether alcohol at different temperatures can be adjusted, and the deep penetration acid fracturing effect on a high-temperature stratum is achieved.
Description
Technical Field
The invention relates to the technical field of petroleum, in particular to a polychlorinated ether alcohol self-acid generator and a using method thereof.
Background
At present, the autogenous acid at home and abroad has high acid rock reaction speed in high-temperature strata, short acidification radius and small acid liquor penetration distance, and can not achieve deep penetration acid fracturing effect on the high-temperature strata in the process of petroleum exploitation.
Disclosure of Invention
The invention aims to provide a polychlorinated ether alcohol self-acid generator and a using method thereof, and solves the problems of high reaction speed of self-acid-generating high-temperature formation acid rock, short acidification radius and small acid liquid penetration distance in the prior art.
The technical scheme adopted by the invention for solving the technical problem is as follows: a polychlorinated ether alcohol self-acid generator comprises polychlorinated ether alcohol, a low-temperature inhibitor and a medium-temperature catalyst and/or a high-temperature accelerator, wherein the polychlorinated ether alcohol is CnClmOxHyWherein n =2-10, n ≤ m ≤ 2n, x =2-10, x ≤ y ≤ 5x, the medium-temperature catalyst is an alkali compound, the low-temperature inhibitor is a hydrocarbon compound, andthe high-temperature speed increasing agent is an organic compound.
In the polychlorinated ether alcohol self-acid generator of the present invention, the low-temperature inhibitor includes at least one of an alkane, a halogenated alkane, and an aromatic hydrocarbon, which are insoluble in water and have a carbon number of more than 10.
In the polychlorinated ether alcohol photoacid generator of the present invention, the mass of the low-temperature inhibitor is 3 to 15% of the mass of the polychlorinated ether alcohol.
In the polychlorinated ether alcohol self-acid generator of the present invention, the polychlorinated ether alcohol self-acid generator includes a moderate-temperature catalyst, and the moderate-temperature catalyst includes at least one of an organic amine, an organic amide, and an inorganic weak base.
In the polychlorinated ether alcohol self-acid generator of the present invention, the mass of the moderate-temperature catalyst is 0.01 to 1.5% of the mass of the polychlorinated ether alcohol.
In the polychlorinated ether alcohol self-acid generator of the present invention, the polychlorinated ether alcohol self-acid generator includes a high temperature rate accelerator including at least one of an organic nitrile, an organic oxime, an organic hydroxylamine, and pyridine.
In the polychlorinated ether alcohol photoacid generator of the present invention, the mass of the high-temperature accelerator is 0.05 to 5% of the mass of the polychlorinated ether alcohol.
The invention also provides a use method of the polychlorinated ether alcohol self-acid generator, which comprises the following steps: the polychlorinated ether alcohol self-acid generator is mixed with water and then squeezed into the cracks of the high-temperature stratum along with the fracturing fluid or independently.
In the using method of the invention, the mass ratio of the water to the polychlorinated ether alcohol self-acid generator is between 1: 1-1: between 0.5.
The implementation of the polychlorinated ether alcohol self-acid generator and the using method thereof has the following beneficial effects: according to the polychlorinated ether alcohol self-acid generator, the low-temperature inhibitor, the medium-temperature catalyst and/or the high-temperature accelerator are/is added into the polychlorinated ether alcohol, so that the self-acid generation rate of the polychlorinated ether alcohol at different temperatures can be adjusted, and the deep penetration acid fracturing effect on a high-temperature stratum is achieved.
Detailed Description
The following examples are provided to further illustrate the polychlorinated ether alcohol photoacid generators of the present invention and methods of use thereof:
the polychlorinated ether alcohol is MCE for short, hardly hydrolyzes at the temperature lower than 50 ℃ after meeting water, starts to hydrolyze in a moist atmosphere at 90 ℃ and largely hydrolyzes at 130 ℃, and is referred to as the following reaction formula:
the polychlorinated ether alcohol self-acid generator is formed by adding a low-temperature inhibitor and a medium-temperature catalyst and/or a high-temperature speed increasing agent into polychlorinated ether alcohol, namely the polychlorinated ether alcohol self-acid generator comprises polychlorinated ether alcohol, the low-temperature inhibitor and the medium-temperature catalyst and/or the high-temperature speed increasing agent, and the polychlorinated ether alcohol is CnClmOxHyWherein n =2-10, m is not less than 2n, x =2-10, y is not less than 5x, the medium temperature catalyst is an alkali compound, the low temperature inhibitor is a hydrocarbon compound, and the high temperature accelerator is an organic compound.
Wherein the low temperature inhibitor comprises at least one of water-insoluble alkane with carbon number greater than 10, halogenated alkane, and aromatic hydrocarbon, such as white wax oil. The mass of the low-temperature inhibitor is 3% to 15% of the mass of the polychlorinated ether alcohol, preferably the mass of the low-temperature inhibitor is 7% to 12% of the mass of the polychlorinated ether alcohol, more preferably the mass of the low-temperature inhibitor is 10% of the mass of the polychlorinated ether alcohol.
Wherein the medium-temperature catalyst comprises at least one of organic amine, organic amide and inorganic weak base, such as urea. The mass of the medium-temperature catalyst is 0.01-1.5% of that of the polychlorinated ether alcohol, and preferably, the mass of the medium-temperature catalyst is 0.5-1% of that of the polychlorinated ether alcohol.
Wherein the polychlorinated ether alcohol self-acid generator comprises a high-temperature accelerator, and the high-temperature accelerator comprises at least one of organic nitrile, organic oxime, organic hydroxylamine and pyridine, such as DMF (N, N-dimethylformamide) and the like. The mass of the high-temperature speed increasing agent is 0.05-5% of that of the polychlorinated ether alcohol, and preferably, the mass of the high-temperature speed increasing agent is 0.5-2.5% of that of the polychlorinated ether alcohol.
When the polychlorinated ether alcohol self-acid generator is used, a small amount of MCE and water or xanthan gum solution can be directly mixed to prepare viscous fluid which is extruded into a high-temperature stratum fracture needing acidizing and acid fracturing along with fracturing fluid or independently. Or when in use, a large amount of solid MCE powder with the particle size of more than 200 meshes is directly mixed into the viscous xanthan gum solution to prepare a suspension which is extruded into a high-temperature stratum fracture needing acidizing acid fracturing along with the fracturing fluid or independently. After the ground temperature rises again, hydrolysis, hydrochloric acid generation and acid corrosion cracks occur, and the stratum flow conductivity is enlarged.
Wherein the mass ratio of the water to the polychlorinated ether alcohol is 1: 1-1: between 0.5. Or the mass ratio of the xanthan gum solution to the polychlorinated ether alcohol is 1: 1-1: between 0.5.
The polychlorinated ether alcohol self-acid generator can independently generate hydrochloric acid to perform self-acid-generation acid pressing and acidification on carbonate rock and limestone strata, and can also be matched with other reagents and the like to be used as self-acid-generation soil acid to perform self-acid-generation acid pressing and acidification on sandstone, igneous rock and the like, such as ammonium fluohydrite and the like. The mass percentage concentration of the acid converted into the aqueous solution of hydrochloric acid obtained after the polychlorinated ether alcohol MCE with the highest concentration completely reacts with water can reach 54.75 percent.
The following is a detailed description of specific examples.
Example 1:
the polychlorinated ether alcohol is a polychlorinated ether alcohol MCE mixture (wherein C is C) produced by Xinxiang Hongtong science and technology limited3Cl6O2H225-33.3 percent of C6Cl12O3H833.4-50% by mass, C9Cl18 O4H1825% -33.3% of the mass ratio), and distilled water according to the weight ratio of 1: 1, and performing experiments on the reaction speed of the generated hydrochloric acid at 50 ℃, 90 ℃, 130 ℃ and 170 ℃ respectively, and the results are shown in table 1.
Example 2:
the same polychloroetherol as in example 1 was selected with distilled water in a ratio of 1: 1 mass ratio, and adding white wax oil accounting for 3 percent of the mass of the polychlorinated ether alcohol as a low-temperature inhibitor, and performing experiments on the reaction speed of the generated hydrochloric acid at 50 ℃, 90 ℃, 130 ℃ and 170 ℃ respectively, wherein the results are shown in Table 1.
Example 3:
the same polychloroetherol as in example 1 was selected with distilled water in a ratio of 1: 1 mass ratio, and simultaneously adding 10% of white wax oil as a low-temperature inhibitor based on the mass of the polychlorinated ether alcohol, and performing experiments on the reaction speed of the generated hydrochloric acid at 50 ℃, 90 ℃, 130 ℃ and 170 ℃ respectively, wherein the results are shown in Table 1.
Example 4:
the same polychloroetherol as in example 1 was selected with distilled water in a ratio of 1: 1 mass ratio, and simultaneously adding white wax oil accounting for 15 percent of the mass of the polychlorinated ether alcohol as a low-temperature inhibitor, and performing experiments on the reaction speed of the generated hydrochloric acid at 50 ℃, 90 ℃, 130 ℃ and 170 ℃ respectively, wherein the results are shown in Table 1.
Example 5:
the same polychloroetherol as in example 1 was selected with distilled water in a ratio of 1: 1, adding urea which is 0.01 percent of the mass of the polychlorinated ether alcohol and is used as a medium-temperature catalyst, and performing experiments on the reaction speed of the generated hydrochloric acid at 50 ℃, 90 ℃, 130 ℃ and 170 ℃ respectively, wherein the results are shown in table 1.
Example 6:
the same polychloroetherol as in example 1 was selected with distilled water in a ratio of 1: 1 mass ratio of the chlorinated polyether alcohol, and 10% of white wax oil as a low temperature inhibitor and 1% of urea as a medium temperature catalyst, respectively at 50 deg.C, 90 deg.C, 130 deg.C and 170 deg.C, were mixed and subjected to hydrochloric acid formation reaction rate test, and the results are shown in Table 1.
Example 7:
the same polychloroetherol as in example 1 was selected with distilled water in a ratio of 1: 1 mass ratio of the chlorinated polyether alcohol, and 10% of the chlorinated polyether alcohol mass of the white wax oil as a low temperature inhibitor, and 1.5% of the chlorinated polyether alcohol mass of the urea as a medium temperature catalyst were added, and the reaction rate of the hydrochloric acid formation was measured at 50 ℃, 90 ℃, 130 ℃ and 170 ℃ respectively, and the results are shown in Table 1.
Example 8:
the same polychloroetherol as in example 1 was selected with distilled water in a ratio of 1: 1 mass ratio, and simultaneously adding DMF 0.05% of the mass of the polychlorinated ether alcohol as a high-temperature speed increasing agent, and performing the experiment of the reaction speed of the generated hydrochloric acid at 50 ℃, 90 ℃, 130 ℃ and 170 ℃ respectively, wherein the results are shown in Table 1.
Example 9:
the same polychloroetherol as in example 1 was selected with distilled water in a ratio of 1: 1 mass ratio of white wax oil 10% of the mass of the polychlorinated ether alcohol as a low temperature inhibitor, and DMF 2.5% of the mass of the polychlorinated ether alcohol as a high temperature accelerator were mixed together, and the reaction rate of the generated hydrochloric acid was measured at 50 ℃, 90 ℃, 130 ℃ and 170 ℃ respectively, and the results are shown in Table 1.
Example 10:
the same polychloroetherol as in example 1 was selected with distilled water in a ratio of 1: 1, mixing and using white wax oil accounting for 10 percent of the mass of the polychlorinated ether alcohol as a low-temperature inhibitor, and simultaneously adding DMF accounting for 5 percent of the mass of the polychlorinated ether alcohol as a high-temperature speed increasing agent, and performing experiments on the reaction speed of generating hydrochloric acid at 50 ℃, 90 ℃, 130 ℃ and 170 ℃ respectively, wherein the results are shown in tables 1 and 2.
Table 1:
TABLE 2
From the results of the examples shown in tables 1 and 2, it can be seen that, in the case where no additive is added (example 1), the acid production rate of the polychlorinated ether alcohol is not high at low temperature (50 ℃) when meeting water (the pH value is reduced from 7 to 5 within 2 hours), but the acid production rate is low at medium and high temperature (90 ℃ to 170 ℃), and the requirements of on-site acid fracturing construction cannot be met at all.
In the case of only adding urea as the medium-temperature catalyst (example 5), although the acid production rate of the polychlorinated ether alcohol is high (the hydrochloric acid yield can reach more than 95% within 2 hours) when meeting water at the medium temperature (90 ℃ -130 ℃), the acid production rate of the polychlorinated ether alcohol is also fast at the low temperature (50 ℃) (the pH value is reduced from 7 to 1.5 within 2 hours), and the requirement of site acid fracturing construction cannot be met.
In the case of adding only DMF as the high temperature accelerator (example 8), although the acid production rate of the polychlorinated ether alcohol is high (the hydrochloric acid yield can reach more than 95% within 2 hours) at the medium and high temperature (130 ℃ -170 ℃) when meeting water, the acid production rate of the polychlorinated ether alcohol is very high (the hydrochloric acid yield can reach 25% within 2 hours) at the low temperature (50 ℃), and the requirement of the on-site acid fracturing construction can not be met.
While the acid production rate of polychlorinated ether alcohol at low temperature (50 ℃) can be maintained at extremely low speed (the PH value is kept to be 6.5 within 2 hours) when polychlorinated ether alcohol is in contact with water under the condition of singly adding the white wax oil as the low-temperature inhibitor (example 2-4), the acid production rate at medium and high temperature (90 ℃ -170 ℃) is very low, and the requirement of site acid fracturing construction can not be met at all.
Only when the low-temperature inhibitor (white wax oil) is added, and the medium-temperature catalyst (urea) and/or the high-temperature accelerating agent (DMF) are respectively added, can the polychlorinated ether alcohol be ensured to be rarely hydrolyzed at low temperature (less than or equal to 70 ℃) when meeting water, and hydrochloric acid can be quickly released at medium temperature (70 ℃ -140 ℃) and high temperature (140 ℃ -210 ℃), so that the purpose of long-penetration acid fracturing construction of the limestone carbonate rock stratum is achieved (examples 6, 7, 9 and 10).
From the above results, it can be seen that: the reaction speed of the polychlorinated ether alcohol generating the hydrochloric acid when meeting water has positive correlation with the temperature, namely the reaction speed is faster when the temperature is higher, and vice versa; suitable low temperature inhibitors (e.g., large alkanes such as white wax oil, aromatic hydrocarbons, halogenated alkanes) can reduce the reaction rate, especially the reaction rate at low temperature; the reaction speed can be accelerated by a proper medium-temperature catalyst (such as organic amine, organic amide and inorganic weak base like urea), especially the medium-temperature reaction speed; suitable high temperature accelerators (such as organic nitriles like DMF, organic oximes, organic hydroxylamines, pyridines) can accelerate the reaction speed, especially the high temperature reaction speed. The use amounts of the low-temperature inhibitor, the medium-temperature catalyst and the high-temperature accelerator are comprehensively adjusted, so that the deep penetration acid fracturing effect on the middle-high temperature limestone carbonate stratum can be achieved.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (9)
1. The polychlorinated ether alcohol self-acid generator is characterized by comprising polychlorinated ether alcohol, a low-temperature inhibitor and a medium-temperature catalyst and/or a high-temperature accelerator, wherein the polychlorinated ether alcohol is CnClmOxHyWherein n =2-10, m is not less than n and not more than 2n, x =2-10, x is not less than y and not more than 5x, the medium-temperature catalyst is an alkaline compound, the low-temperature inhibitor is a hydrocarbon compound, and the high-temperature accelerator is an organic compound.
2. The polychlorinated ether alcohol photoacid generator of claim 1, wherein the low temperature inhibitor comprises at least one of an alkane, a halogenated alkane, and an aromatic hydrocarbon that are insoluble in water and have a carbon number greater than 10.
3. The polychlorinated ether alcohol photoacid generator according to claim 2, wherein the mass of the low temperature inhibitor is 3 to 15% of the mass of the polychlorinated ether alcohol.
4. The polychlorinated ether alcohol photoacid generator of claim 1, wherein the polychlorinated ether alcohol photoacid generator comprises a moderate temperature catalyst comprising at least one of an organic amine, an organic amide, an inorganic weak base.
5. The polychlorinated ether alcohol photoacid generator according to claim 4, wherein the mass of the mesophilic catalyst is 0.01 to 1.5% of the mass of the polychlorinated ether alcohol.
6. The polychlorinated ether alcohol photoacid generator of claim 1, wherein the polychlorinated ether alcohol photoacid generator comprises a high temperature rate accelerator comprising at least one of an organic nitrile, an organic oxime, an organic hydroxylamine, pyridine.
7. The polychlorinated ether alcohol photoacid generator according to claim 6, wherein the mass of the high temperature accelerator is 0.05 to 5% of the mass of the polychlorinated ether alcohol.
8. A method of using the polychlorinated ether alcohol acid generator of any one of claims 1 to 7, comprising: the polychlorinated ether alcohol self-acid generator is mixed with water and then squeezed into the cracks of the high-temperature stratum along with the fracturing fluid or independently.
9. The method of using the polychlorinated ether alcohol acid generator of claim 8, wherein the mass ratio of water to polychlorinated ether alcohol acid generator is between 1: 1-1: between 0.5.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899012A (en) * | 2012-11-14 | 2013-01-30 | 北京世纪中星能源技术有限公司 | Self-born acid and preparation method and application thereof |
| CN104975840A (en) * | 2015-06-18 | 2015-10-14 | 中国石油化工股份有限公司 | Self-born acid composite acid fracturing process for high-temperature deep well carbonate rock reservoir |
| CN106147743A (en) * | 2015-04-23 | 2016-11-23 | 中国石油天然气股份有限公司 | A kind of petroleum-gas fiedl acid stimulation injection agent and preparation method thereof |
| CN110643344A (en) * | 2018-06-26 | 2020-01-03 | 中国石油化工股份有限公司 | Double-retarding emulsifying self-generated acid and preparation method thereof |
| CN110804431A (en) * | 2019-11-12 | 2020-02-18 | 深圳市百勤石油技术有限公司 | Thickening autogenous acid generating system for oil-gas reservoir acid fracturing production increasing measures and preparation method |
-
2020
- 2020-09-23 CN CN202011010497.7A patent/CN112342010A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899012A (en) * | 2012-11-14 | 2013-01-30 | 北京世纪中星能源技术有限公司 | Self-born acid and preparation method and application thereof |
| CN106147743A (en) * | 2015-04-23 | 2016-11-23 | 中国石油天然气股份有限公司 | A kind of petroleum-gas fiedl acid stimulation injection agent and preparation method thereof |
| CN104975840A (en) * | 2015-06-18 | 2015-10-14 | 中国石油化工股份有限公司 | Self-born acid composite acid fracturing process for high-temperature deep well carbonate rock reservoir |
| CN110643344A (en) * | 2018-06-26 | 2020-01-03 | 中国石油化工股份有限公司 | Double-retarding emulsifying self-generated acid and preparation method thereof |
| CN110804431A (en) * | 2019-11-12 | 2020-02-18 | 深圳市百勤石油技术有限公司 | Thickening autogenous acid generating system for oil-gas reservoir acid fracturing production increasing measures and preparation method |
Non-Patent Citations (2)
| Title |
|---|
| 刘炜等: "缓速酸种类及乳化酸应用研究进展", 《精细石油化工进展》 * |
| 方娅: "缓速酸及其添加剂", 《钻采工艺》 * |
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