CN111808590A - Environment-friendly energy-increasing oil and water well blocking remover capable of rapidly reacting at normal temperature - Google Patents
Environment-friendly energy-increasing oil and water well blocking remover capable of rapidly reacting at normal temperature Download PDFInfo
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- CN111808590A CN111808590A CN202010808303.1A CN202010808303A CN111808590A CN 111808590 A CN111808590 A CN 111808590A CN 202010808303 A CN202010808303 A CN 202010808303A CN 111808590 A CN111808590 A CN 111808590A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 230000000903 blocking effect Effects 0.000 title claims abstract description 36
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 41
- 239000012190 activator Substances 0.000 claims abstract description 35
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical group [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 11
- 235000010288 sodium nitrite Nutrition 0.000 claims abstract description 11
- AOMUHOFOVNGZAN-UHFFFAOYSA-N N,N-bis(2-hydroxyethyl)dodecanamide Chemical compound CCCCCCCCCCCC(=O)N(CCO)CCO AOMUHOFOVNGZAN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004202 carbamide Substances 0.000 claims abstract description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 20
- 230000001965 increasing effect Effects 0.000 abstract description 14
- 238000005516 engineering process Methods 0.000 abstract description 9
- 239000006260 foam Substances 0.000 abstract description 9
- 239000012295 chemical reaction liquid Substances 0.000 abstract description 4
- 238000009412 basement excavation Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 58
- 238000002347 injection Methods 0.000 description 27
- 239000007924 injection Substances 0.000 description 27
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 14
- 239000007789 gas Substances 0.000 description 10
- 239000002253 acid Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 238000010276 construction Methods 0.000 description 8
- 239000003129 oil well Substances 0.000 description 8
- 230000006378 damage Effects 0.000 description 7
- 230000000007 visual effect Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 238000004090 dissolution Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 244000144972 livestock Species 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229940051841 polyoxyethylene ether Drugs 0.000 description 1
- 229920000056 polyoxyethylene ether Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Inorganic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses an environment-friendly energy-increasing oil and water well blocking remover capable of rapidly reacting at normal temperature, and relates to the technical field of oil field old well excavation and potential. The blocking remover comprises an energy main agent and an activator, wherein the energy main agent is urea, sodium nitrite and lauryl diethanol amide, and the activator is aluminum sulfate in a mass ratio of 15-20: 5-10: 1-3: 2-4. The obtained raw materials and reaction liquid have no dangerous chemicals, and the method is an environment-friendly and pollution-free formula system. The reaction in a closed environment generates high-temperature of more than or equal to 100 ℃, high-pressure of more than or equal to 20MPa and high-quality foam, the high-temperature, high-pressure and high-foam effects are utilized to increase energy for the stratum, organic scale is dissolved at high temperature, and movable pollution plugs in the stratum are discharged out of a well mouth under high pressure. The blockage of organic scale and inorganic scale in oil and water wells is removed, a sauna bath type physical blockage removing technology is performed on the stratum approximately, the operation time is short, the blockage removing effective period is long, and the oil increasing effect is improved by 30-50%.
Description
Technical Field
The invention relates to the technical field of oil field old well excavation and potential, in particular to an environment-friendly energy-increasing oil and water well blocking remover capable of reacting quickly at normal temperature.
Background
In the field of oilfield development, normally producing oil wells (including gas wells) and water injection wells are traditionally referred to as old wells. Where oil wells (including gas wells) are used to produce crude oil and natural gas from subterranean formations. After the long-term exploitation, the stratum is emptied, the water injection well is reasonably arranged to inject clean water quantitatively, and the stratum emptying energy of the communicated oil well is supplemented, so that the stable yield is kept, the yield is increased, and the oil and gas recovery ratio is improved. The oil and water wells are generally subjected to periodical pollution blockage of oil flow pore passages in the long-term exploitation process, the sources of the blockage are exogenous and endogenous, and the types of the blockage are organic scale and inorganic scale. Because the oil flow channel is blocked, the yield is reduced or no yield is caused, pollution blockage is eliminated, and the oil and gas yield is recovered or improved. Collectively referred to as: the old well dredging technology.
In the old well dredging technology, the conventional oil and water well dredging technology uses hydrochloric acid as a main agent and is added with a plurality of auxiliary agents to form a plurality of acid solution formula systems, the pH value of the acid solution is less than or equal to 1, and the acid solution belongs to a strong acid dissolution type hydrochloric acid deblocking agent. By means of the high corrosivity of strong acid, specific granular blocky inorganic scales such as ferric oxide, rock debris and the like in the pore canal of the stratum are corroded into powder, the pore canal of the oil flow is enlarged, the crude oil recovery rate is improved, the system can also be called as a dissolution type acidification blockage removal technology, and plays an indispensable role in a period of time.
However, the conventional oil and water well 'strong acid dissolution type' hydrochloric acid blocking remover mainly has the following problems: (1) the device is ineffective in removing blockage of organic scales such as thick oil, wax, asphaltene and the like, and liquid thick oil can be reversely emulsified into a solid state to form a secondary blocked oil layer; (2) residual acid is easy to remain in the stratum to damage the skeleton structure of the stratum, collapse is caused by serious people, and oil and water wells are scrapped; (3) the corrosion to oil, casing and oil extraction equipment is very strong, and the oil is easy to damage or reduce the service life; (4) the construction on site is dangerous, the environment is easy to be polluted, and the harm to people, livestock, environment and cultivated land is large; (5) hydrochloric acid is a dangerous chemical and a drug which is easy to be controlled, and the storage, transportation and use conditions are severe. Therefore, the innovation of a neutral blockage removing technology which can simultaneously remove organic scale and inorganic scale blockage, has longer blockage removing effective period and better blockage removing effect and does not harm the environment, people, livestock and stratum becomes urgent.
Disclosure of Invention
The invention aims to provide an environment-friendly energy-increasing oil and water well blocking remover capable of reacting quickly at normal temperature, which can effectively avoid the problems of danger, corrosion and the like caused by hydrochloric acid adopted in the traditional technology, and can complete the blocking removal operation in a short time at normal temperature.
The invention relates to the technical field of oil field old well excavation and potential technology, in particular to an environment-friendly energy-increasing oil and water well blocking remover capable of rapidly reacting at normal temperature, which comprises an energy main agent and an activator, wherein the energy main agent, a clear water spacer fluid and the activator are plugged into a stratum in a segmented manner and then are exposed, high temperature of more than or equal to 100 ℃, high pressure of more than or equal to 20MPa and high-quality foam are generated by reaction in a closed environment, the high temperature, the high pressure and the high foam function are utilized to increase energy for the stratum, organic scale is dissolved at the high temperature, and movable pollution plugs in the stratum are discharged back to a well mouth at the high. The blockage of organic scale and inorganic scale in oil and water wells is synchronously removed, a sauna bath type physical blockage removing technology is performed on the stratum approximately, the operation time is short, the blockage removing effective period is long, and the oil increasing effect is improved by 30-50%. Solves the problems of high toxicity, high pollution, high damage and high risk of the hydrochloric acid blocking remover with strong acid corrosion and the defect of single effect of removing organic scale and inorganic scale. The reaction equation is as follows:
CO(NH2)2+NaNO2+C16H33NO3+AI2(SO4)3→2N2+CO2+H2o + exothermic reaction + foaming.
In this reaction, the molecular weights of urea, sodium nitrite, lauryl diethanol amide, and aluminum sulfate were 60, 69, 314, and 342, respectively. Experimental results show that 70.0g of energy main agent and 5.0g of activating agent react completely and quickly within 1 hour at the normal temperature of 15-25 ℃, heat more than or equal to 100 ℃ can be generated, 18.25L of nitrogen and carbon dioxide can be generated, a large amount of foam can be generated, the dosage is increased in a sealed environment, and the pressure can reach more than or equal to 20 MPa.
The technical scheme adopted by the invention is that
An environment-friendly energy-increasing oil and water well blocking remover capable of reacting quickly at normal temperature is characterized in that an energy main agent comprises urea, sodium nitrite and lauryl diethanol amide, an activator is aluminum sulfate, and the mass ratio of the energy main agent to the activator is 15-20: 5-10: 1-3: 2-4, and the volume ratio of the energy main agent to the activator is 12-17: 2-4.
The invention is characterized in that a certain amount of clear water is added between the energy main agent and the activator as spacer fluid, the segmented plug is squeezed into the stratum from the oil well mouth and the water well mouth, the segmented plug enters the stratum and then faces, the reaction is complete rapidly within 1 hour under the condition of normal temperature of 15-25 ℃, and the pH value of the reaction solution is 7.
The invention is also characterized in that the organic scale wax and the asphaltene in the stratum can be dissolved into the fluid liquid when the temperature is higher than 70 ℃ after agglomeration, and the temperature of the reaction liquid is higher than or equal to 100 ℃, so that the blockage of the organic scale can be removed; when the well mouth is opened instantly to release high pressure, high pressure gas and foam of more than or equal to 20MPa returns the movable inorganic scale particles and organic scale residual liquid in the stratum to the stratum and lifts out of the well mouth, thus achieving the purpose of removing pollution blockage.
Detailed Description
In order to achieve the purpose of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be fully described below.
The examples do not show specific conditions, and the products or equipment used are not shown in manufacturers, and all the products or equipment can be obtained from the market.
The embodiment of the invention provides an environment-friendly energy-increasing oil and water well blocking remover which can quickly react at the normal temperature of 15-25 ℃, wherein an energy main agent is extruded into a well bore, then clear water isolation liquid is extruded into the well bore, then an activator is extruded into the well bore, the energy main agent and the activator are in an isolated state in the well bore, and after the energy main agent and the activator are extruded into a stratum, the energy main agent and the activator are exposed and quickly chemically react to generate heat, gas and foam. The contact between the main agent and the activator produces great amount of high temperature, high pressure and foam energy to eliminate oil and inorganic scale and organic scale from water well, expand the flow passage, prolong the effective period of dredging and raise the dredging effect.
The other existing oil and water well self-heating and self-gas-generating blocking remover needs to be prepared by mixing a main agent and an activator and then extruding the mixture into a stratum, and slowly reacts to generate heat and gas when the temperature is increased to be higher than 50 ℃ for 2 to 3 days depending on the body temperature of the stratum in a stratum closed environment, so that the field construction time is prolonged, the generated heat is small, the generated gas pressure is low, and the blocking removing effect is poor. The invention optimizes the materials of the main agent and the activating agent, the reaction is complete within 1 hour at normal temperature, the whole operation time can be completed within one day, the reaction time is shortened, the heat production, gas production and foam production energy are increased, the blockage removal effect is improved, and the aim of quickly removing the blockage at normal temperature is fulfilled.
The pH value of the reaction liquid in the embodiment of the invention is 7, the reaction liquid is neutral, no pollution and harm are caused to the stratum, the environment, people and livestock, the problems of harm and pollution caused by the conventional 'strong acid dissolution type' hydrochloric acid blocking remover are solved, and the defects of long reaction time and small reaction energy of another oil and water well self-heating and self-generated gas blocking remover are also solved.
Example 1
The embodiment provides an environment-friendly energy-increasing oil and water well blocking remover capable of reacting quickly at normal temperature, and the blocking remover can be used for performing blocking removal operation on one water injection well. Comprises 17.0m of energy main agent solution3And activator 4.0m3。
Wherein the mass concentration of the formula comprises 20.0 percent of energy main agent urea, 9.5 percent of sodium nitrite and 2.8 percent of lauroyl diethanol amine; the activator aluminum sulfate is 4.0 percent.
The construction method comprises the steps of (1) respectively preparing an energy main agent and an activator on the ground in proportion, extruding a blocking remover into a stratum from a well mouth by using a pumping device and a sectional plug according to the following steps, (2) extruding the energy main agent firstly, (3) then extruding a certain amount of clear water as a spacer fluid, (4) extruding the activator, (5) closing a well for reaction for 1 hour, (6) opening a well mouth valve to release pressure to be non-pressure, washing the well by using clear water until the water colors of an inlet and an outlet are consistent, and (7) putting into normal production.
The implementation effect is detected by adopting a well site visual reading instrument mode, the oil pressure before the measure is 20.5MPa, and the daily water injection amount is 20.0m3Daily water injection amount of 0.0m3(ii) a After the measures, the oil pressure is 9.5MPa, and the daily water injection quantity is 20.0m3Daily water injection rate of 20.0m3. The implementation effect is that the oil pressure of the water injection well is reduced by 11.0MPa, and the daily water injection amount is increased by 20.0m3And the daily injection allocation requirement is met.
Example 2
The embodiment provides an environment-friendly energy-increasing oil and water well blocking remover capable of reacting quickly at normal temperature, and the blocking remover can be used for performing blocking removal operation on one water injection well. Comprises an energy main agent solution 12.6m3And activator 2.0m3。
Wherein the mass concentration of the formula comprises 15.0 percent of energy main agent urea, 5.7 percent of sodium nitrite and 1.2 percent of lauroyl diethanol amine; the activator aluminum sulfate is 2.2 percent.
The construction process was carried out according to example 1.
The implementation effect is detected by adopting a well field visual reading instrument mode, the oil pressure before the measure is 18.0MPa, and the daily water injection quantity is 15.0m3Daily water injection amount of 4.4m3(ii) a After the measure, the oil pressure is 13.5MPa, and the daily water injection quantity is 15.0m3Daily water injection rate of 15.0m3. The implementation effect is that the oil pressure of the water injection well is reduced by 4.5MPa, and the daily water injection amount is increased by 10.6m3And the daily injection allocation requirement is met.
Example 3
The embodiment provides an environment-friendly energy-increasing oil and water well blocking remover which can react quickly at normal temperature and is used for carrying out blocking removal operation on an oil well. Comprises an energy main agent 15.6m3And activator 3.5m3。
Wherein the mass concentration of the formula comprises 18.0 percent of energy main agent urea, 8.3 percent of sodium nitrite and 2.1 percent of lauroyl diethanol amine; the activator aluminum sulfate is 3.9 percent.
The construction process was carried out according to example 1.
The implementation effect is detected by adopting a well field visual reading instrument mode, namely the daily liquid production is 1.5m before the measure30.2t of daily oil, water contentThe rate is 85.1%; the daily yield is 8.7m after the measures32.6t of daily oil, and 65.2 percent of water content. The implementation effect is as follows: increase daily liquid production by 7.2m3The daily oil production is increased by 2.4 t.
Example 4
The embodiment provides an environment-friendly energy-increasing oil and water well blocking remover which can react quickly at normal temperature and is used for carrying out blocking removal operation on an oil well. Comprises an energy main agent of 16.5m3And activator 3.1m3。
Wherein the mass concentration of the formula comprises 16.2 percent of energy main agent urea, 6.4 percent of sodium nitrite and 1.5 percent of lauroyl diethanol amine; the activator aluminum sulfate is 2.6 percent.
The construction process was carried out according to example 1.
The implementation effect is detected by adopting a well field visual reading instrument mode, namely the daily liquid production is 0.8m before the measure30.2t of daily oil yield and 65.2 percent of water content; the daily yield is 6.9m after the measures32.3t of daily oil, and 60.2 percent of water content. The implementation effect is as follows: increase of daily liquid production by 6.1m3The daily oil production is increased by 2.1 t.
Example 5
The embodiment provides an environment-friendly energy-increasing oil and water well blocking remover which can react quickly at normal temperature and is used for carrying out blocking removal operation on an oil well. Comprises an energy main agent of 12.0m3And activator 2.0m3。
Wherein the mass concentration of the formula comprises 15.2 percent of energy main agent urea, 5.0 percent of sodium nitrite and 1.1 percent of lauroyl diethanol amine; the activator aluminum sulfate is 2.0 percent.
The construction process was carried out according to example 1.
The implementation effect is detected by adopting a well field visual reading instrument mode, namely the daily liquid production is 1.5m before the measure30.6t of daily oil yield and 53.0 percent of water content; the daily yield is 8.7m after the measures33.7t of daily oil, and 50.1 percent of water content. The implementation effect is as follows: increase daily liquid production by 7.2m3The daily oil production is increased by 3.1 t.
Comparative example 1
The comparative example provides a blocking remover for self-heating, self-gas-generating oil and water wells, which carries out blocking removal operation on water injection similar to the well condition of example 1The difference from the example 1 is that the energy main agent is composed of 25.0% of ammonium chloride, 40.0% of sodium nitrite and 10.0% of sodium dodecyl sulfate; 14.0 percent of oxalic acid serving as an activator and 10 percent of Wangji phenol polyoxyethylene ether are respectively prepared into aqueous solutions, including 16.0m of main agent solution3Activator solution 4.5m3. And extruding the segmented plug into the stratum from the wellhead of the water injection well according to the implementation steps.
The implementation effect is detected by adopting a well site visual reading instrument mode, the oil pressure before the measure is 19.3MPa, and the daily water injection amount is 20.0m3Daily water injection amount of 0.0m3After the measure, the oil pressure is 16.1MPa, and the daily water injection quantity is 20.0m3Daily water injection rate of 18.0m3. The implementation effect is that the oil pressure of the water injection well of the comparative example is reduced by 3.2MPa, and the daily water injection amount is 18.0m3The oil pressure is reduced little, and the daily water injection amount is still insufficient by 2.0m3。
Comparative example 2
The comparative example provides an environment-friendly energy-increasing oil and water well blocking remover capable of rapidly reacting at normal temperature, and the blocking removing operation is carried out on an oil well similar to the well condition of example 5, wherein the volume ratio of an energy main agent, clear water spacer fluid and an activator is the same as that of example 5, the formula mass concentration of the energy main agent is also the same, and the difference is that the formula mass concentration of the activator aluminum sulfate is 1.0%.
The construction steps are the same as those in example 1.
The implementation effect is detected by adopting a well field visual reading instrument mode, namely the daily liquid production is 1.4m before the measure30.8t of daily oil yield and 50.1 percent of water content; the daily yield is 2.2m after the measures31.2t of daily oil, 49.0 percent of water content, and the implementation effect that the daily liquid is increased by 0.8m3The daily oil yield is increased by 0.4t, and the oil increasing effect is poor.
The embodiments described above are some, but not all embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (3)
1. The environment-friendly energy-increasing oil and water well blocking remover capable of rapidly reacting at normal temperature is characterized by comprising an energy main agent and an activator, wherein the energy main agent comprises urea, sodium nitrite and lauryl diethanol amide, the activator is aluminum sulfate, and the mass ratio of the urea to the sodium nitrite to the lauryl diethanol amide to the aluminum sulfate is 15-20: 5-10: 1-3: 2-4.
2. The environmental-friendly energy-increasing oil-water well blocking remover capable of rapidly reacting at normal temperature according to claim 1, wherein the volume ratio of the energy main agent to the activator is 12-17: 1-3.
3. The environmental-friendly energy-increasing oil-water well blocking remover capable of rapidly reacting at normal temperature according to claim 1, wherein in the feeding process, clear water is added between the energy main agent and the activator slug to serve as a spacer fluid, so that the energy main agent and the activator enter a stratum and then are exposed, the rapid reaction is completed within 1 hour at the normal temperature of 15-25 ℃, and the pH value of the liquid after the reaction is 7.
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Citations (13)
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