CN115651621A - High-permeability thickened oil blocking remover, preparation method thereof and blocking removal construction method - Google Patents
High-permeability thickened oil blocking remover, preparation method thereof and blocking removal construction method Download PDFInfo
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- CN115651621A CN115651621A CN202211473699.4A CN202211473699A CN115651621A CN 115651621 A CN115651621 A CN 115651621A CN 202211473699 A CN202211473699 A CN 202211473699A CN 115651621 A CN115651621 A CN 115651621A
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- 230000000903 blocking effect Effects 0.000 title claims abstract description 88
- 238000010276 construction Methods 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000003921 oil Substances 0.000 claims abstract description 77
- 239000000463 material Substances 0.000 claims abstract description 50
- 239000004094 surface-active agent Substances 0.000 claims abstract description 48
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 34
- 239000003350 kerosene Substances 0.000 claims abstract description 32
- 150000001413 amino acids Chemical class 0.000 claims abstract description 25
- 238000002156 mixing Methods 0.000 claims abstract description 24
- 239000002904 solvent Substances 0.000 claims abstract description 24
- 150000001408 amides Chemical class 0.000 claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 23
- 238000002347 injection Methods 0.000 claims abstract description 21
- 239000007924 injection Substances 0.000 claims abstract description 21
- 230000000149 penetrating effect Effects 0.000 claims abstract description 21
- 239000000295 fuel oil Substances 0.000 claims abstract description 13
- AXTGDCSMTYGJND-UHFFFAOYSA-N 1-dodecylazepan-2-one Chemical compound CCCCCCCCCCCCN1CCCCCC1=O AXTGDCSMTYGJND-UHFFFAOYSA-N 0.000 claims description 16
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical group CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 10
- 241000191291 Abies alba Species 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 230000035515 penetration Effects 0.000 claims 2
- 239000010779 crude oil Substances 0.000 abstract description 11
- 230000018044 dehydration Effects 0.000 abstract description 10
- 238000006297 dehydration reaction Methods 0.000 abstract description 10
- 230000009467 reduction Effects 0.000 abstract description 7
- 238000006073 displacement reaction Methods 0.000 abstract description 6
- 230000035699 permeability Effects 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 5
- 239000007764 o/w emulsion Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- 238000012360 testing method Methods 0.000 description 8
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000003129 oil well Substances 0.000 description 6
- 239000003814 drug Substances 0.000 description 5
- 238000005457 optimization Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000013543 active substance Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to the technical field of thickened oil blocking remover, in particular to a high-permeability thickened oil blocking remover, a preparation method and a blocking removal construction method thereof, wherein the high-permeability thickened oil blocking remover comprises kerosene, an amide solvent, a penetrating agent and an amino acid type surfactant as raw materials, and is obtained by the following steps: and (2) uniformly mixing the penetrating agent and the amino acid type surfactant to obtain a mixed material I, uniformly mixing the kerosene and the amide solvent to obtain a mixed material II, adding the mixed material II into the mixed material I, and stirring until the mixed material II is completely dissolved to obtain the oil-in-water emulsion. The high-permeability heavy oil blocking remover disclosed by the invention is matched with a high-pressure low-displacement pump injection blocking removal construction method, so that the viscosity of crude oil can be well reduced, the blocking of a heavy oil well is effectively solved, an oil sleeve annular circulation channel is established, and the high-permeability heavy oil blocking remover has the characteristics of good permeability, high viscosity reduction performance and high safety performance. Meanwhile, the demulsifier has good compatibility with the field demulsifier, and does not influence the dehydration of crude oil.
Description
Technical Field
The invention relates to the technical field of thickened oil blocking removers, in particular to a high-permeability thickened oil blocking remover, a preparation method and a blocking removal construction method thereof.
Background
The thickened oil steam huff-and-puff well is influenced by the properties of thickened oil products in the process of exploitation and the temperature and the pressure in the process of exploitation, when the temperature and the pressure are reduced, the thickened oil loses fluidity, so that an oil sleeve annulus is blocked by the thickened oil, the blockage is difficult to be removed by adopting conventional measures, the oil well can not be normally produced, the cost is increased for solving the problem by subsequent blockage removal, and the safety risk is improved.
The thickened oil steam huff and puff well has the problems of annular blockage of an oil sleeve and no circulation channel of an oil well due to the fact that the temperature is reduced and the fluidity of crude oil is reduced, and brings great difficulty to production and maintenance of the oil well. At present, aiming at the problems, the main methods for thick oil blockage removal construction comprise: 1) Steam is injected at high pressure for heating, the viscosity of crude oil is reduced, and the crude oil is discharged outside and then injected and discharged again; 2) The viscosity reducer is injected into the high-pressure pump truck for viscosity reduction and blockage removal or the paraffin removal and blockage removal agent is used for blockage removal, the process conditions are limited, when the agent is injected after the pump truck starts the pump, because the discharge capacity is large, the pressure rises instantly and exceeds the pressure of wellhead equipment, potential safety hazards can be caused, the agent cannot be injected or the injected agent cannot be fully mixed with the thickened oil for reaction, and the purpose of blockage removal cannot be achieved.
Disclosure of Invention
The invention provides a high-permeability thickened oil blocking remover, a preparation method thereof and a blocking removal construction method, overcomes the defects of the prior art, and can effectively solve the problems that the existing thickened oil blocking remover is poor in blocking removal performance, cannot reduce the viscosity of crude oil and cannot establish an annular space channel of an oil jacket.
One of the technical schemes of the invention is realized by the following measures: the high-permeability heavy oil blocking remover comprises 35-40% of kerosene, 35-40% of amide solvent, 5-10% of penetrating agent and the balance of amino acid type surfactant.
The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:
the amide solvent is N, N-dimethylacetamide.
The penetrating agent is oil-soluble azone.
The amino acid type surfactant is one of an N-alkyl amino acid type surfactant and an N-acyl amino acid type surfactant.
The high-permeability thickened oil blocking remover is obtained by the following steps: uniformly mixing the penetrating agent and the amino acid type surfactant in required amounts, stirring until the penetrating agent and the amino acid type surfactant are completely dissolved to obtain a mixed material I, uniformly mixing the kerosene and the amide solvent in required amounts to obtain a mixed material II, adding the mixed material II into the mixed material I, and stirring until the kerosene and the amide solvent are completely dissolved to obtain the high-permeability thick oil blocking remover.
The second technical scheme of the invention is realized by the following measures: a preparation method of a high-permeability thickened oil blocking remover comprises the following steps: uniformly mixing the penetrating agent and the amino acid type surfactant in required amounts, stirring until the penetrating agent and the amino acid type surfactant are completely dissolved to obtain a mixed material I, uniformly mixing the kerosene and the amide solvent in required amounts to obtain a mixed material II, adding the mixed material II into the mixed material I, and stirring until the kerosene and the amide solvent are completely dissolved to obtain the high-permeability thick oil blocking remover.
The third technical scheme of the invention is realized by the following measures: a blockage removal construction method of a high-permeability thickened oil blockage removal agent comprises the following steps:
firstly, verifying the rated pressure of the Christmas tree;
then injecting a high-permeability thickened oil blocking remover into a wellhead, and controlling the pump injection construction pressure to be 0MPa to 10MPa and the pump discharge capacity to be 0.83kg/min to 10kg/min;
and finally, observing the change of the pump injection construction pressure and the pump discharge capacity, and gradually increasing the pump discharge capacity for construction when the pump injection construction pressure is reduced in the process of injecting the high-permeability thickened oil blocking remover by the pump until the pump injection construction pressure is stable and unchanged, so that the blocking removal is successful.
The invention has the beneficial effects that:
the raw material amide solvent is N, N-dimethylacetamide, and the solvent and kerosene are mixed to achieve a good thickened oil dilution effect; the raw material penetrant of the invention adopts oil-soluble azone, which can improve the permeability of the medicament in thick oil, accelerate the reaction time of the medicament and play the role of an active agent; the raw material amino acid type surfactant adopts N-alkyl amino acid type surfactant or N-acyl amino acid type surfactant, so that the viscosity reduction effect can be achieved; the invention has the advantages of easily obtained raw materials and good compatibility among the components.
The high-permeability thick oil blocking remover disclosed by the invention belongs to an oil-soluble viscosity reducer, can well reduce the viscosity of thick oil by reacting with the thick oil, and has the characteristics of good permeability and high viscosity reduction performance. In the subsequent well flushing process, because the high-permeability thick oil blocking remover has good compatibility with thick oil of an oil well, and the blocking removal construction method, also called a high-pressure low-displacement pump injection blocking removal construction method, is matched, in the blocking removal construction process, a small-discharge high-pressure pump or (a pump truck) is adopted to slowly inject the high-permeability thick oil blocking remover through pressure control, and the high-permeability thick oil blocking remover permeates into thick oil under the condition of injection of the high-pressure pump, so that the contact area of a medicament is increased, the viscosity of crude oil is reduced, and the problems of annular blocking of an oil sleeve and no circulation channel can be quickly solved.
In a word, the high-permeability thick oil blocking remover is matched with a high-pressure low-displacement pump injection blocking removal construction method, so that the viscosity of crude oil can be well reduced, the blocking of a thick oil well is effectively solved, an oil sleeve annular circulation channel is established, and the high-permeability thick oil blocking remover has the characteristics of good permeability, high viscosity reduction performance and high safety performance. Meanwhile, the demulsifier has good compatibility with the field demulsifier, and does not influence the dehydration of crude oil.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention. The various chemical reagents and chemical articles mentioned in the invention are all the chemical reagents and chemical articles which are well known and commonly used in the prior art, unless otherwise specified; the percentages in the present invention are all mass percentages unless otherwise specified.
The invention is further described below with reference to the following examples:
example 1: the high-permeability thickened oil blocking remover comprises 35-40% of kerosene, 35-40% of amide solvent, 5-10% of penetrating agent and the balance of amino acid type surfactant.
Example 2: the high-permeability thickened oil blocking remover comprises 35% or 40% of kerosene, 35% or 40% of amide solvent, 5% or 10% of penetrating agent and the balance of amino acid type surfactant.
Example 3: as optimization of the above embodiment, the amide solvent is N, N-dimethylacetamide.
Example 4: as an optimization of the above embodiment, the penetrant is oil-soluble azone.
Example 5: as optimization of the above embodiment, the amino acid type surfactant is one of an N-alkyl amino acid type surfactant and an N-acyl amino acid type surfactant.
Example 6: as the optimization of the embodiment, the high-permeability thickened oil blocking remover is obtained by the following steps: uniformly mixing a required amount of penetrating agent and amino acid type surfactant, stirring until the penetrating agent and the amino acid type surfactant are completely dissolved to obtain a mixed material I, uniformly mixing a required amount of kerosene and amide solvent to obtain a mixed material II, adding the mixed material II into the mixed material I, and stirring until the mixed material II is completely dissolved to obtain the high-permeability thick oil blocking remover.
Example 7: the high-permeability thickened oil blocking remover comprises 40% of kerosene, 35% of N, N-dimethylacetamide, 10% of oil-soluble azone and 15% of N-alkyl amino acid type surfactant according to weight percentage, and is obtained by the following steps: uniformly mixing oil-soluble azone and N-alkyl amino acid type surfactant with required amount, stirring until the oil-soluble azone and the N-alkyl amino acid type surfactant are completely dissolved to obtain a mixed material I, uniformly mixing kerosene and N, N-dimethylacetamide with required amount to obtain a mixed material II, adding the mixed material II into the mixed material I, and stirring until the kerosene and the N, N-dimethylacetamide are completely dissolved to obtain the high-permeability thick oil blocking remover.
Example 8: the high-permeability thickened oil blocking remover comprises 40% of kerosene, 35% of N, N-dimethylacetamide, 10% of oil-soluble azone and 15% of N-acyl amino acid type surfactant according to weight percentage, and is obtained by the following steps: uniformly mixing oil-soluble azone and N-acyl amino acid type surfactant in required amount, stirring until the oil-soluble azone and the N-acyl amino acid type surfactant are completely dissolved to obtain a mixed material I, uniformly mixing kerosene and N, N-dimethylacetamide in required amount to obtain a mixed material II, adding the mixed material II into the mixed material I, and stirring until the kerosene and the N, N-dimethylacetamide are completely dissolved to obtain the high-permeability thickened oil blocking remover.
Example 9: the high-permeability thickened oil blocking remover comprises 35% of kerosene, 40% of N, N-dimethylacetamide, 5% of oil-soluble azone and 15% of N-alkyl amino acid type surfactant in balance by weight percent, and is obtained by the following steps: uniformly mixing oil-soluble azone and N-alkyl amino acid type surfactant in required amount, stirring until the oil-soluble azone and the N-alkyl amino acid type surfactant are completely dissolved to obtain a mixed material I, uniformly mixing kerosene and N, N-dimethylacetamide in required amount to obtain a mixed material II, adding the mixed material II into the mixed material I, and stirring until the kerosene and the N, N-dimethylacetamide are completely dissolved to obtain the high-permeability thickened oil blocking remover.
Example 10: the high-permeability thickened oil blocking remover comprises 35% of kerosene, 40% of N, N-dimethylacetamide, 5% of oil-soluble azone and 15% of N-acyl amino acid type surfactant in balance by weight percent, and is obtained by the following steps: uniformly mixing oil-soluble azone and N-acyl amino acid type surfactant in required amount, stirring until the oil-soluble azone and the N-acyl amino acid type surfactant are completely dissolved to obtain a mixed material I, uniformly mixing kerosene and N, N-dimethylacetamide in required amount to obtain a mixed material II, adding the mixed material II into the mixed material I, and stirring until the kerosene and the N, N-dimethylacetamide are completely dissolved to obtain the high-permeability thickened oil blocking remover.
Comparative example 1: and (4) injecting steam (without a blocking remover, and performing viscosity reduction and blocking removal).
Comparative example 2: the mixed benzene wax-removing and blocking-removing agent is sold in the market.
Comparative example 3: commercially available surfactant type deblocking agents.
Example 11: the deblocking construction method of the high-permeability heavy oil deblocking agent is carried out according to the following method:
firstly, verifying the rated pressure of the Christmas tree;
then, injecting a high-permeability thickened oil blocking remover into a wellhead, controlling the pump injection construction pressure to be 0MPa to 10MPa, and controlling the pump discharge capacity to be 0.83kg/min to 10kg/min;
and finally, observing the change of the pump injection construction pressure and the pump discharge capacity, and gradually increasing the pump discharge capacity for construction when the pump injection construction pressure is reduced in the process of injecting the high-permeability thickened oil blocking remover by the pump until the pump injection construction pressure is stable and unchanged, so that the blocking removal is successful.
Example 12: the blockage removal construction method of the high-permeability thickened oil blockage removal agent comprises the following specific implementation steps:
the first step is as follows: the high-permeability thickened oil blocking remover is prepared for later use.
A second step; and (3) preparing before plugging removal construction, judging whether the well mouth is intact and each connecting piece is complete and effective, and verifying the rated pressure of the Christmas tree (the rated pressure of the Christmas tree of the steam huff-puff well is 14 MPa).
The third step: and connecting the ground pipeline and the on-site construction equipment, carrying out pressure test on the ground pipeline, and carrying out the next step after the pressure test is qualified.
The fourth step: opening an oil pipe and a casing gate, starting a pump to slowly inject a high-permeability thickened oil blocking remover into a well mouth, controlling the construction pressure of the pump injection to be 0MPa to 10MPa, controlling the pump discharge capacity to be 0.83kg/min to 10kg/min, stabilizing the pump discharge capacity when starting construction, slowly increasing the construction pressure, observing whether the pressure gauge has fluctuation and whether the pump normally operates, and when the pressure gauge and the pump cannot normally operate (the construction pressure cannot meet the requirement, the pump discharge capacity is high, and a medicament cannot be injected), increasing the pressure, reducing the discharge capacity, continuing the steps until the pressure gauge data has fluctuation, stabilizing the current pressure and the discharge capacity, and continuously injecting the high-permeability thickened oil blocking remover.
And fifthly, continuously observing the change of the pump injection pressure and the pump discharge capacity, gradually increasing the discharge capacity for construction when the pressure is reduced in the process of injecting the high-permeability thickened oil blocking remover by the pump, repeating the steps until the pressure is stable and unchanged, increasing the pressure fluctuation of the pump injection discharge capacity to quickly rise, and indicating that the blocking removal is successful when a numerical value is stabilized.
And a sixth step: and successfully removing the blockage, recovering the wellhead and waiting for next measures.
Example 13: the high-permeability thickened oil blocking remover obtained in the embodiments 7 to 10 of the invention is used for testing steam huff and puff blocked wells in Xinjiang oil fields, and the test comprises the field construction pressure (MPa), the blocking removal time (h), the produced fluid viscosity (mPa & s) after the blocking removal, and the field extraction of the pipe column condition and the dehydration compatibility condition of the produced fluid in the process of repairing after the blocking removal is successful. The dehydration compatibility condition of the produced liquid comprises the produced liquid water content (%), the produced liquid dehydration rate (%) for 2 hours, the produced liquid dehydration rate (%) for 4 hours and the produced liquid demulsification condition, and meanwhile, comparative examples 1 to 3 of the invention are used as controls. The site construction method is carried out according to the blockage removal construction method in the embodiment 12 of the invention.
The on-site construction pressure (MPa), the time (h) required for deblocking, the viscosity (mPa · s) of the produced fluid after deblocking and the test results of the conditions of on-site extraction of the tubular column in the test are shown in Table 1, and it can be seen from Table 1 that when the invention is used for on-site construction in comparative example 1, the on-site construction pressure is high and the time required for deblocking is long; when the comparative example 2 of the invention is used for field construction, the field construction pressure and the time required by the construction are similar to those of the examples 7 to 10, but the medicament (the commercial mixed benzene paraffin removal and blockage removal agent) of the comparative example 2 of the invention has higher risk; when the invention is used for site construction, the blockage removal fails in the comparative example 3. Therefore, when the high-permeability heavy oil blocking remover obtained in the embodiments 7 to 10 of the invention is used for field construction, the field construction pressure is low, the time required by blocking removal is short, the viscosity of produced liquid after blocking removal is low, and a pipe column is pulled out cleanly on the field. It is shown that the high-permeability heavy oil blocking remover obtained in the embodiments 7 to 10 of the invention can effectively solve the blockage of a heavy oil well by matching with a small-displacement high-pressure low-displacement pump injection blocking removal construction method.
The test results of the dehydration compatibility of the produced fluid in the test are shown in table 2, and it can be seen from table 2 that both the high-permeability thickened oil blocking remover obtained in examples 7 to 10 of the present invention and the comparative example 2 of the present invention show better compatibility with the on-site demulsifier, and do not affect the dehydration of the produced fluid. The comparative example 3 of the invention has poor compatibility with the on-site demulsifier, and influences the dehydration of the produced fluid.
In conclusion, the high-permeability thick oil blocking remover disclosed by the invention can be matched with a high-pressure low-displacement pump injection blocking removal construction method, so that the viscosity of crude oil can be well reduced, the blockage of a thick oil well can be effectively solved, an oil sleeve annular circulation channel is established, and the high-permeability thick oil blocking remover has the characteristics of good permeability, high viscosity reduction performance and high safety performance. Meanwhile, the demulsifier has good compatibility with the field demulsifier, and does not influence the dehydration of crude oil.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (10)
1. The high-permeability heavy oil blocking remover is characterized by comprising 35-40% of kerosene, 35-40% of amide solvent, 5-10% of penetrating agent and the balance of amino acid type surfactant in percentage by weight.
2. The high-permeability heavy oil blocking remover according to claim 1, wherein the amide solvent is N, N-dimethylacetamide.
3. The heavy oil blocking remover according to claim 1 or 2, wherein the penetrant is oil-soluble azone.
4. The high penetration thick oil deblocking agent according to claim 1 or 2, characterized in that the amino acid type surfactant is one of an N-alkyl amino acid type surfactant and an N-acyl amino acid type surfactant.
5. The high penetration thick oil deblocking agent according to claim 3, characterized in that the amino acid type surfactant is one of an N-alkyl amino acid type surfactant and an N-acyl amino acid type surfactant.
6. The high-permeability thickened oil blocking remover according to claim 1, 2 or 5, is characterized by being obtained by the following steps: uniformly mixing the penetrating agent and the amino acid type surfactant in required amounts, stirring until the penetrating agent and the amino acid type surfactant are completely dissolved to obtain a mixed material I, uniformly mixing the kerosene and the amide solvent in required amounts to obtain a mixed material II, adding the mixed material II into the mixed material I, and stirring until the kerosene and the amide solvent are completely dissolved to obtain the high-permeability thick oil blocking remover.
7. The high-permeability thickened oil blocking remover according to claim 3, is characterized by being obtained by the following steps: uniformly mixing the penetrating agent and the amino acid type surfactant in required amounts, stirring until the penetrating agent and the amino acid type surfactant are completely dissolved to obtain a mixed material I, uniformly mixing the kerosene and the amide solvent in required amounts to obtain a mixed material II, adding the mixed material II into the mixed material I, and stirring until the kerosene and the amide solvent are completely dissolved to obtain the high-permeability thick oil blocking remover.
8. The high-permeability thickened oil blocking remover according to claim 4, is characterized by being obtained by the following steps: uniformly mixing the penetrating agent and the amino acid type surfactant in required amounts, stirring until the penetrating agent and the amino acid type surfactant are completely dissolved to obtain a mixed material I, uniformly mixing the kerosene and the amide solvent in required amounts to obtain a mixed material II, adding the mixed material II into the mixed material I, and stirring until the kerosene and the amide solvent are completely dissolved to obtain the high-permeability thick oil blocking remover.
9. A method for preparing the high-permeability heavy oil blocking remover according to any one of claims 1 to 5, which is characterized by comprising the following steps of: uniformly mixing the penetrating agent and the amino acid type surfactant in required amounts, stirring until the penetrating agent and the amino acid type surfactant are completely dissolved to obtain a mixed material I, uniformly mixing the kerosene and the amide solvent in required amounts to obtain a mixed material II, adding the mixed material II into the mixed material I, and stirring until the kerosene and the amide solvent are completely dissolved to obtain the high-permeability thick oil blocking remover.
10. The deblocking construction method of the high-permeability heavy oil deblocking agent according to any one of claims 1 to 5, characterized by comprising the following steps:
firstly, verifying the rated pressure of the Christmas tree;
then, injecting a high-permeability thickened oil blocking remover into a wellhead, controlling the pump injection construction pressure to be 0MPa to 10MPa, and controlling the pump discharge capacity to be 0.83kg/min to 10kg/min;
and finally, observing the change of the pump injection construction pressure and the pump discharge capacity, and gradually increasing the pump discharge capacity for construction when the pump injection construction pressure is reduced in the process of injecting the high-permeability thickened oil blocking remover by the pump until the pump injection construction pressure is stable and unchanged, so that the blocking removal is successful.
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| CN202211473699.4A CN115651621B (en) | 2022-11-23 | 2022-11-23 | High-permeability thickened oil blocking remover, preparation method thereof and blocking removing construction method |
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| CN202211473699.4A CN115651621B (en) | 2022-11-23 | 2022-11-23 | High-permeability thickened oil blocking remover, preparation method thereof and blocking removing construction method |
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| CN115651621B CN115651621B (en) | 2023-10-31 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1498939A (en) * | 2002-10-30 | 2004-05-26 | 大庆高新区鑫诺精细化工有限公司 | Formulary system of amino acid type surfactant and application in tertiary oil recovery |
| CN102746838A (en) * | 2011-04-22 | 2012-10-24 | 中国石油天然气股份有限公司 | Blocking remover for gas well shaft |
| CN108690589A (en) * | 2018-05-31 | 2018-10-23 | 中国石油天然气股份有限公司 | Oil well blocking remover and preparation method and application thereof |
-
2022
- 2022-11-23 CN CN202211473699.4A patent/CN115651621B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1498939A (en) * | 2002-10-30 | 2004-05-26 | 大庆高新区鑫诺精细化工有限公司 | Formulary system of amino acid type surfactant and application in tertiary oil recovery |
| CN102746838A (en) * | 2011-04-22 | 2012-10-24 | 中国石油天然气股份有限公司 | Blocking remover for gas well shaft |
| CN108690589A (en) * | 2018-05-31 | 2018-10-23 | 中国石油天然气股份有限公司 | Oil well blocking remover and preparation method and application thereof |
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