CN112358863A - Chemical yield increasing liquid for low-permeability oil layer and yield increasing method - Google Patents
Chemical yield increasing liquid for low-permeability oil layer and yield increasing method Download PDFInfo
- Publication number
- CN112358863A CN112358863A CN202110034200.9A CN202110034200A CN112358863A CN 112358863 A CN112358863 A CN 112358863A CN 202110034200 A CN202110034200 A CN 202110034200A CN 112358863 A CN112358863 A CN 112358863A
- Authority
- CN
- China
- Prior art keywords
- component
- oil
- low permeability
- fluid
- preparation
- 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.)
- Granted
Links
- 239000000126 substance Substances 0.000 title claims abstract description 27
- 230000001965 increasing effect Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000007788 liquid Substances 0.000 title abstract description 17
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 36
- 230000035699 permeability Effects 0.000 claims abstract description 33
- 239000012530 fluid Substances 0.000 claims abstract description 31
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 26
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000003129 oil well Substances 0.000 claims abstract description 23
- -1 alkylbenzene sulfonate Chemical class 0.000 claims abstract description 18
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims abstract description 12
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 12
- YIKSCQDJHCMVMK-UHFFFAOYSA-N Oxamide Chemical compound NC(=O)C(N)=O YIKSCQDJHCMVMK-UHFFFAOYSA-N 0.000 claims abstract description 12
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims abstract description 12
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004202 carbamide Substances 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 239000003208 petroleum Substances 0.000 claims abstract description 12
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 12
- 239000011734 sodium Substances 0.000 claims abstract description 12
- 239000004317 sodium nitrate Substances 0.000 claims abstract description 12
- 235000010344 sodium nitrate Nutrition 0.000 claims abstract description 12
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims description 63
- 238000003756 stirring Methods 0.000 claims description 42
- 230000000638 stimulation Effects 0.000 claims description 31
- 239000008139 complexing agent Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 9
- NZRSEGYTVSNMCK-UHFFFAOYSA-N sodium;undecyl benzenesulfonate Chemical group [Na].CCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 NZRSEGYTVSNMCK-UHFFFAOYSA-N 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 7
- 150000004996 alkyl benzenes Chemical class 0.000 claims description 6
- 229940077388 benzenesulfonate Drugs 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000012824 chemical production Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 230000000694 effects Effects 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 230000035945 sensitivity Effects 0.000 description 5
- 239000002253 acid Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical group NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000009096 changqing Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000000291 postprandial effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- UEUXEKPTXMALOB-UHFFFAOYSA-J tetrasodium;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O UEUXEKPTXMALOB-UHFFFAOYSA-J 0.000 description 1
Classifications
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention is applicable to the technical field of oil exploitation, and provides a chemical yield increasing liquid for a low-permeability oil layer and a yield increasing method. The chemical yield increasing fluid for the low-permeability oil layer comprises a component A, a component B and a component C; the component A comprises ammonium nitrate, urea and alkylbenzene sulfonate; the component B comprises sodium nitrate, oxamide and sodium dodecyl sulfate; the component C comprises hydrochloric acid, acetic acid and petroleum sodium sulfonate. The high-temperature and high-pressure gas generated by the reaction enters the reservoir stratum gap hole from the perforation section, and the high-pressure gas in the reservoir stratum gap can effectively penetrate through a smaller gap at a higher temperature to open an oil and gas conveying route, so that the resistance is reduced, the oil extraction yield is increased, the permeability of an oil well is finally improved, and the oil well yield is improved.
Description
Technical Field
The invention belongs to the technical field of oil exploitation, and particularly relates to a chemical yield increasing liquid for a low-permeability oil layer and a yield increasing method.
Background
At present, the measures adopted by the conventional acidizing well are still a mode of acidizing and permeating medium and shallow reservoirs and medium and high reservoirs, namely, hydrochloric acid is used for acidizing carbonate reservoirs, and earth acid and composite acid are used for acidizing sandstone reservoirs, so that the aim of improving the productivity is achieved again. Generally, the primary oil tests of the middle and high permeability well zones have commercial oil flow production values, but the low permeability zones are subjected to secondary modification under the condition that the primary oil tests have no effect due to insufficient inherent reservoir conditions, the permeability modification conditions are severe, and weak side effects can have a fatal effect. For example, in medium permeability conditions, weak rate sensitivity effects have little effect on the post-zonal production values of medium permeability, but for low permeability zones, weak rate sensitivity may lead to momentary shut-downs of the producing well. Similarly, other types of sensitivity effects are also key factors affecting the retardation of the production of low permeability reservoir wells. Because low permeability oil layers have multiple types of sensitivity, the reconstruction measures can be implemented only after the formula is selected according to the reservoir property and the sensitivity characteristic and the dynamic flow simulation is optimized.
Therefore, the current factors that limit the success rate of low-permeability acidized reservoirs mainly include: the acid liquor and the additive have poor matching with a low-permeability reservoir, so that the oil increasing effect is poor.
Disclosure of Invention
The embodiment of the invention aims to provide a chemical yield increasing fluid for a low permeability oil layer and a yield increasing method, and aims to solve the problems in the prior art pointed out in the background art.
The embodiment of the invention is realized in such a way that the chemical yield increasing fluid for the low-permeability oil layer comprises a component A, a component B and a component C;
the component A comprises ammonium nitrate, urea and alkylbenzene sulfonate, wherein the mass ratio of the ammonium nitrate to the urea to the alkylbenzene sulfonate is (1-1.5): (0.5-0.8): (0.1 to 0.2);
the component B comprises sodium nitrate, oxamide and sodium dodecyl sulfate, and the mass ratio of the sodium nitrate to the oxamide to the sodium dodecyl sulfate is (1-1.5): (0.5-0.8): (0.1 to 0.2);
the component C comprises hydrochloric acid, acetic acid and petroleum sodium sulfonate, wherein the mass ratio of the hydrochloric acid to the acetic acid to the petroleum sodium sulfonate is (4-4.3): (0.9-1): (0.9-1).
As another preferable scheme of the embodiment of the invention, the preparation method of the component A comprises the following steps:
adding ammonium nitrate into a preparation tank, sequentially adding urea and alkylbenzene sulfonate in sequence, and stirring simultaneously in the preparation process;
and continuously and fully stirring for 20-30 minutes.
As another preferred version of this embodiment of the present invention, the alkylbenzene sulfonate is sodium undecylbenzene sulfonate.
As another preferable scheme of the embodiment of the invention, the preparation method of the component B comprises the following steps:
adding sodium nitrate into a preparation tank, sequentially adding oxamide and sodium dodecyl sulfate in sequence, and stirring simultaneously in the preparation process;
and continuously and fully stirring for 20-30 minutes.
As another preferable scheme of the embodiment of the invention, the preparation method of the component C comprises the following steps:
adding hydrochloric acid into a preparation tank, sequentially adding acetic acid and petroleum sodium sulfonate in sequence, and stirring simultaneously in the preparation process;
and continuously and fully stirring for 20-30 minutes.
Another object of an embodiment of the present invention is to provide a stimulation method for a chemical production increasing fluid for a low permeability oil reservoir, including the following steps:
injecting the component A into the middle of the artificial bottom hole and the perforation section of the oil well;
injecting component B into the well bore;
the component A and the component B are fused for chemical reaction to generate high-temperature gas with the temperature of 200-300 ℃ and the pressure of 18-22 MPa, and the high-temperature gas enters a reservoir and reacts for 10-22 hours;
injecting the component C into a pipe cavity of an oil well, and reacting for 10-22 hours;
and continuously repeating the steps for 3-5 times.
As another preferable scheme of the embodiment of the invention, the prepad fluid is added before the component A and the component B are added.
As another preferable scheme of the embodiment of the invention, after the component A and the component B are added, the postprandial liquid particle complexing agent is added.
As another preferable scheme of the embodiment of the invention, the pad fluid is ammonium carboxylate, and the post-fluid particle complexing agent is an aminocarboxylate complexing agent.
As another preferable scheme of the embodiment of the invention, the component A, the component B and the component C are dissolved by a solvent 8-11 hours before construction.
The high-temperature and high-pressure gas generated by the reaction enters the reservoir stratum gap hole from the perforation section, and the high-pressure gas in the reservoir stratum gap can effectively penetrate through a smaller gap at a higher temperature to open an oil and gas conveying route, so that the resistance is reduced, the oil extraction yield is increased, the permeability of an oil well is finally improved, and the oil well yield is improved. The method has the advantages of simple construction, no damage to the reservoir, repeated use, obvious oil increasing effect and the like.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Specific implementations of the present invention are described in detail below with reference to specific embodiments.
Example 1
This embodiment provides a chemical stimulation fluid for low permeability reservoirs comprising component a, component B and component C;
the preparation method of the component A comprises the following steps: adding 1t of ammonium nitrate into a preparation tank, sequentially adding 0.8t of urea and 0.1t of alkylbenzene sulfonate, and stirring simultaneously in the preparation process; continuously stirring fully for 30 minutes; the alkyl benzene sulfonate is sodium undecyl benzene sulfonate;
the preparation method of the component B comprises the following steps: adding 1t of sodium nitrate into a preparation tank, sequentially adding 0.8t of oxamide and 0.1t of sodium dodecyl sulfate in sequence, and stirring simultaneously in the preparation process; continuously stirring fully for 30 minutes;
the preparation method of the component C comprises the following steps: adding 4t of hydrochloric acid into a preparation tank, sequentially adding 1t of acetic acid and 0.9t of petroleum sodium sulfonate, and stirring simultaneously in the preparation process; stirring was continued for 30 minutes.
Example 2
This embodiment provides a chemical stimulation fluid for low permeability reservoirs comprising component a, component B and component C;
the preparation method of the component A comprises the following steps: 1.5t of ammonium nitrate is added into a preparation tank, 0.5t of urea and 0.2t of alkylbenzene sulfonate are sequentially added according to the sequence, and stirring is carried out simultaneously in the preparation process; continuously stirring fully for 20 minutes; the alkyl benzene sulfonate is sodium undecyl benzene sulfonate;
the preparation method of the component B comprises the following steps: adding 1.5t of sodium nitrate into a preparation tank, sequentially adding 0.5t of oxamide and 0.2t of sodium dodecyl sulfate, and stirring simultaneously in the preparation process; continuously stirring fully for 20 minutes;
the preparation method of the component C comprises the following steps: adding 4.3t of hydrochloric acid into a preparation tank, sequentially adding 0.9t of acetic acid and 1t of petroleum sodium sulfonate, and stirring simultaneously in the preparation process; stirring was continued for 20 minutes.
Example 3
This embodiment provides a chemical stimulation fluid for low permeability reservoirs comprising component a, component B and component C;
the preparation method of the component A comprises the following steps: 1.1t of ammonium nitrate is added into a preparation tank, 0.6t of urea and 0.15t of alkylbenzene sulfonate are sequentially added according to the sequence, and stirring is carried out simultaneously in the preparation process; continuing to fully stir for 22 minutes; the alkyl benzene sulfonate is sodium undecyl benzene sulfonate;
the preparation method of the component B comprises the following steps: adding 1.2t of sodium nitrate into a preparation tank, sequentially adding 0.6t of oxamide and 0.15t of sodium dodecyl sulfate, and stirring simultaneously in the preparation process; continuously stirring fully for 25 minutes;
the preparation method of the component C comprises the following steps: adding 4.2t of hydrochloric acid into a preparation tank, sequentially adding 0.95t of acetic acid and 0.94t of petroleum sodium sulfonate, and stirring simultaneously in the preparation process; stirring was continued for 25 minutes.
Example 4
This embodiment provides a chemical stimulation fluid for low permeability reservoirs comprising component a, component B and component C;
the preparation method of the component A comprises the following steps: adding 1.3t of ammonium nitrate into a preparation tank, sequentially adding 0.7t of urea and 0.16t of alkylbenzene sulfonate, and stirring simultaneously in the preparation process; continuously stirring fully for 24 minutes; the alkyl benzene sulfonate is sodium undecyl benzene sulfonate;
the preparation method of the component B comprises the following steps: adding 1.4t of sodium nitrate into a preparation tank, sequentially adding 0.7t of oxamide and 0.16t of sodium dodecyl sulfate, and stirring simultaneously in the preparation process; continuously stirring fully for 24 minutes;
the preparation method of the component C comprises the following steps: adding 4.2t of hydrochloric acid into a preparation tank, sequentially adding 0.94t of acetic acid and 0.98t of petroleum sodium sulfonate, and stirring simultaneously in the preparation process; stirring was continued for 28 minutes.
Example 5
This embodiment provides a chemical stimulation fluid for low permeability reservoirs comprising component a, component B and component C;
the preparation method of the component A comprises the following steps: 1.4t of ammonium nitrate is added into a preparation tank, 0.75t of urea and 0.18t of alkylbenzene sulfonate are sequentially added in sequence, and stirring is carried out simultaneously in the preparation process; continuing to fully stir for 29 minutes; the alkyl benzene sulfonate is sodium undecyl benzene sulfonate;
the preparation method of the component B comprises the following steps: adding 1.4t of sodium nitrate into a preparation tank, sequentially adding 0.75t of oxamide and 0.13t of sodium dodecyl sulfate, and stirring simultaneously in the preparation process; continuing to fully stir for 21 minutes;
the preparation method of the component C comprises the following steps: adding 4.25t of hydrochloric acid into the preparation tank, sequentially adding 0.91t of acetic acid and 0.95t of petroleum sodium sulfonate, and stirring simultaneously in the preparation process; stirring was continued for 23 minutes.
Example 6
This example provides a stimulation method of the chemical stimulation fluid for low permeability reservoirs prepared in example 1, comprising the steps of:
the component A, the component B and the component C are dissolved by a solvent 8 hours before construction;
injecting the component A into the middle of the artificial bottom hole and the perforation section of the oil well;
injecting component B into the well bore;
the component A and the component B are fused to carry out chemical reaction to generate high-temperature (200-300 ℃) and 18-22 MPa high-pressure gas (H)2N2、CO2、NO2) Entering a reservoir stratum, and reacting for 10 hours;
injecting the component C into the pipe cavity of the oil well, and reacting for 10 hours;
the above steps are repeated continuously for 5 times.
Example 7
This example provides a stimulation method for a chemical stimulation fluid for low permeability reservoirs prepared in example 2, comprising the steps of:
dissolving the component A, the component B and the component C by using a solvent 10 hours before construction;
injecting the component A into the middle of the artificial bottom hole and the perforation section of the oil well;
injecting component B into the well bore;
the component A and the component B are fused to carry out chemical reaction to generate high-temperature (200-300 ℃) and 18-22 MPa high-pressure gas (H)2N2、CO2、NO2) Entering a reservoir and reacting for 20 hours;
injecting the component C into a pipe cavity of an oil well, and reacting for 20 hours;
the above steps are repeated continuously 3 times.
Example 8
This example provides a stimulation method for a chemical stimulation fluid for low permeability reservoirs prepared in example 3, comprising the steps of:
dissolving the component A, the component B and the component C by adopting a solvent 11 hours before construction;
injecting the component A into the middle of the artificial bottom hole and the perforation section of the oil well;
injecting component B into the well bore;
the component A and the component B are fused to carry out chemical reaction to generate high-temperature (200-300 ℃) and 18-22 MPa high-pressure gas (H)2N2、CO2、NO2) Entering a reservoir and reacting for 22 hours;
injecting the component C into a pipe cavity of an oil well, and reacting for 22 hours;
the above steps are repeated continuously 3 times.
Example 9
This example provides a stimulation method for a chemical stimulation fluid for low permeability reservoirs prepared in example 4, comprising the steps of:
the component A, the component B and the component C are dissolved by a solvent 9 hours before construction;
injecting the component A into the middle of the artificial bottom hole and the perforation section of the oil well;
injecting component B into the well bore;
the component A and the component B are fused to carry out chemical reaction to generate high-temperature (200-300 ℃) and 18-22 MPa high-pressure gas (H)2N2、CO2、NO2) Entering a reservoir and reacting for 18 hours;
injecting the component C into a pipe cavity of an oil well, and reacting for 18 hours;
the above steps are repeated continuously 3 times.
Example 10
This example provides a stimulation method for the chemical stimulation fluid for low permeability reservoirs prepared in example 5, comprising the steps of:
dissolving the component A, the component B and the component C by using a solvent 10 hours before construction;
injecting the component A into the middle of the artificial bottom hole and the perforation section of the oil well;
injecting component B into the well bore;
the component A and the component B are fused to carry out chemical reaction to generate high-temperature (200-300 ℃) and 18-22 MPa high-pressure gas (H)2N2、CO2、NO2) Entering a reservoir stratum, and reacting for 12 hours;
injecting the component C into a pipe cavity of an oil well, and reacting for 12 hours;
the above steps are repeated continuously for 5 times.
Example 11
This example provides a specific stimulation method of the chemical stimulation fluid for low permeability reservoirs of example 1, comprising the steps of:
1. the first process is completed within two days:
adding pre-liquid carboxylic acid ammonia for 0.05 t;
the component A0.55t is added;
adding a postposition liquid particle complexing agent (an ammonia-carboxyl complexing agent) for 0.05 t;
injecting 4t of water for the oil field by using a high-pressure water injection pump, keeping the pressure of an oil well within the pressure range limited by each well, and performing reverse casing drainage 4t while injecting water into an oil pipe;
adding a front liquid (ammonium carboxylate) for 0.05 t;
adding 0.55t of component B;
adding a postposition liquid particle complexing agent (an ammonia-carboxyl complexing agent) for 0.05 t;
injecting 4t of water for the oil field by using a high-pressure water injection pump, keeping the pressure of the oil well within the pressure range limited by each well, performing reverse casing drainage for 4t while injecting water into the oil pipe, and closing the well for reaction for 20 hours;
filling 1.1t of the component C, and closing the well to react for 20 hours;
2. the first process step is repeated 2 times.
Example 12
For old wells (the pressure bearing capacity of a sleeve is less than or equal to 12 MPa), the specific production increasing method of the chemical production increasing liquid for the low-permeability oil layer comprises the following steps:
1. the first process is completed in one day:
filling in 7:00-8:00 as early as:
adding a front liquid (ammonium carboxylate) for 0.05 t;
adding 3.3t of the component A;
adding a postposition liquid particle complexing agent (complexone) for 0.05t,
injecting 4t of water for the oil field by using a high-pressure water injection pump, keeping the pressure of an oil well within the pressure range limited by each well, and performing reverse casing drainage 4t while injecting water into an oil pipe;
adding a front liquid (ammonium carboxylate) for 0.05 t;
component B was added 0.33 t;
adding a postposition liquid particle complexing agent (an ammonia-carboxyl complexing agent) for 0.05 t;
injecting water for the oil field for 3t by using a high-pressure water injection pump, keeping the pressure of the oil well within the pressure range limited by each well, performing reverse casing drainage for 3t while injecting water for the oil pipe, and closing the well for reaction for 10 hours;
6 in the afternoon: filling at 00-7: 00:
adding 0.66t of component C;
injecting water for the oil field for 2t by using a high-pressure water injection pump, keeping the pressure of the oil well within the pressure range limited by each well, performing casing pipe reverse discharge for 2t while injecting water for the oil pipe, and closing the well for reaction for 10 hours;
2. the first pass process described above is repeated for 5 additional passes.
Examples of the experiments
The petrochemical yield-increasing liquid prepared in the embodiment 1 and the yield-increasing method in the embodiment 6 are applied to a 12-Yang 65-52 well group in a fixed-edge operation area of eight factories for oil extraction in the Changqing oil field.
Checking production records after construction:
before the production increasing operation: 3.5t of daily liquid production and 1.5t of daily oil production.
After the production increasing operation: the average daily liquid production in the first 5 months is 5t, and the daily oil production is 2.5 t.
As can be seen, the oil increasing effect of the 65-52 well group is obvious.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A chemical stimulation fluid for low permeability oil layers is characterized by comprising a component A, a component B and a component C;
the component A comprises ammonium nitrate, urea and alkylbenzene sulfonate, wherein the mass ratio of the ammonium nitrate to the urea to the alkylbenzene sulfonate is (1-1.5): (0.5-0.8): (0.1 to 0.2);
the component B comprises sodium nitrate, oxamide and sodium dodecyl sulfate, and the mass ratio of the sodium nitrate to the oxamide to the sodium dodecyl sulfate is (1-1.5): (0.5-0.8): (0.1 to 0.2);
the component C comprises hydrochloric acid, acetic acid and petroleum sodium sulfonate, wherein the mass ratio of the hydrochloric acid to the acetic acid to the petroleum sodium sulfonate is (4-4.3): (0.9-1): (0.9-1).
2. The chemical stimulation fluid for low permeability reservoirs of claim 1, wherein the preparation method of component a comprises the following steps:
adding ammonium nitrate into a preparation tank, sequentially adding urea and alkylbenzene sulfonate in sequence, and stirring simultaneously in the preparation process;
and continuously and fully stirring for 20-30 minutes.
3. A chemical stimulation fluid for low permeability reservoirs according to claim 1 or 2 characterized in that the alkyl benzene sulfonate is sodium undecyl benzene sulfonate.
4. The chemical stimulation fluid for low permeability reservoirs of claim 1, wherein the preparation method of component B comprises the following steps:
adding sodium nitrate into a preparation tank, sequentially adding oxamide and sodium dodecyl sulfate in sequence, and stirring simultaneously in the preparation process;
and continuously and fully stirring for 20-30 minutes.
5. The chemical stimulation fluid for low permeability reservoirs of claim 1, wherein the preparation method of component C comprises the following steps:
adding hydrochloric acid into a preparation tank, sequentially adding acetic acid and petroleum sodium sulfonate in sequence, and stirring simultaneously in the preparation process;
and continuously and fully stirring for 20-30 minutes.
6. A stimulation method for a chemical stimulation fluid for low permeability oil layers according to any of claims 1 to 5, characterized by comprising the following steps:
injecting the component A into the middle of the artificial bottom hole and the perforation section of the oil well;
injecting component B into the well bore;
the component A and the component B are fused for chemical reaction to generate high-temperature gas with the temperature of 200-300 ℃ and the pressure of 18-22 MPa, and the high-temperature gas enters a reservoir and reacts for 10-22 hours;
injecting the component C into a pipe cavity of an oil well, and reacting for 10-22 hours;
and continuously repeating the steps for 3-5 times.
7. A stimulation method for a chemical stimulation fluid for low permeability reservoirs according to claim 6, characterized in that a pad fluid is added before component A and component B.
8. A stimulation method for a chemical stimulation fluid for low permeability reservoirs according to claim 7, characterized in that after the injection of component A and component B, the postfluid particulate complexing agent is injected.
9. A stimulation method for a chemical stimulation fluid for low permeability reservoirs according to claim 8, characterized in that the pad fluid is ammonium carboxylate and the post fluid particulate complexing agent is complexox.
10. A production increasing method of the chemical production increasing fluid for the low permeability oil layer according to claim 6, wherein the component A, the component B and the component C are dissolved by a solvent 8-11 hours before construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110034200.9A CN112358863B (en) | 2021-01-12 | 2021-01-12 | Chemical yield increasing liquid and method for low-permeability oil layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110034200.9A CN112358863B (en) | 2021-01-12 | 2021-01-12 | Chemical yield increasing liquid and method for low-permeability oil layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112358863A true CN112358863A (en) | 2021-02-12 |
| CN112358863B CN112358863B (en) | 2023-07-21 |
Family
ID=74534801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110034200.9A Active CN112358863B (en) | 2021-01-12 | 2021-01-12 | Chemical yield increasing liquid and method for low-permeability oil layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112358863B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102942914A (en) * | 2012-11-22 | 2013-02-27 | 吉林冠通能源科技有限公司 | Hydrogenation heat gas chemical yield increasing solution component for low-permeability carbonate reservoir oil well |
| CN104011172A (en) * | 2011-09-15 | 2014-08-27 | 多化学集团有限责任公司 | Method for Selection of Surfactants in Well Stimulation |
| CN106634922A (en) * | 2016-09-13 | 2017-05-10 | 中国海洋石油总公司 | Self generated gas foam oil-displacing agent liquid and application and injection increase and yield increase method thereof |
| CN106957640A (en) * | 2017-05-19 | 2017-07-18 | 天津亿利科能源科技发展股份有限公司 | It is a kind of to increase the neutral composite drug that oil reservoir formation permeability carries out crude oil volume increase |
| CN108048071A (en) * | 2018-01-12 | 2018-05-18 | 中国海洋石油集团有限公司 | It is a kind of for chemical increasing production liquid of low permeability reservoir and preparation method thereof |
| CN108219767A (en) * | 2016-12-14 | 2018-06-29 | 中国石油化工股份有限公司 | A kind of offshore oilfield acid stimulation system and preparation method thereof |
| CN109810687A (en) * | 2019-03-01 | 2019-05-28 | 中国地质大学（武汉） | A kind of environment-friendly type acidification working solution suitable for the volume increase of hypotonic coalbed methane reservoir |
-
2021
- 2021-01-12 CN CN202110034200.9A patent/CN112358863B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104011172A (en) * | 2011-09-15 | 2014-08-27 | 多化学集团有限责任公司 | Method for Selection of Surfactants in Well Stimulation |
| CN102942914A (en) * | 2012-11-22 | 2013-02-27 | 吉林冠通能源科技有限公司 | Hydrogenation heat gas chemical yield increasing solution component for low-permeability carbonate reservoir oil well |
| CN106634922A (en) * | 2016-09-13 | 2017-05-10 | 中国海洋石油总公司 | Self generated gas foam oil-displacing agent liquid and application and injection increase and yield increase method thereof |
| CN108219767A (en) * | 2016-12-14 | 2018-06-29 | 中国石油化工股份有限公司 | A kind of offshore oilfield acid stimulation system and preparation method thereof |
| CN106957640A (en) * | 2017-05-19 | 2017-07-18 | 天津亿利科能源科技发展股份有限公司 | It is a kind of to increase the neutral composite drug that oil reservoir formation permeability carries out crude oil volume increase |
| CN108048071A (en) * | 2018-01-12 | 2018-05-18 | 中国海洋石油集团有限公司 | It is a kind of for chemical increasing production liquid of low permeability reservoir and preparation method thereof |
| CN109810687A (en) * | 2019-03-01 | 2019-05-28 | 中国地质大学（武汉） | A kind of environment-friendly type acidification working solution suitable for the volume increase of hypotonic coalbed methane reservoir |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112358863B (en) | 2023-07-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9738824B2 (en) | Tight gas stimulation by in-situ nitrogen generation | |
| US2238930A (en) | Treatment of earth formations | |
| CN103333670B (en) | A kind of for self generating gas system and using method thereof in the layer of plug removal in oil and water well energization | |
| CN101699026B (en) | Hyposmosis oil pool microbial oil recovery method | |
| CN100549126C (en) | Preposition acid solution and preposition sour sandfrac method | |
| US20120241148A1 (en) | Control of fluid flow during treatment of subterranean sites using well fluid injection | |
| Zhang et al. | Permeability damage micro-mechanisms and stimulation of low-permeability sandstone reservoirs: A case study from Jiyang Depression, Bohai Bay Basin, China | |
| CN111058824B (en) | Temporary plugging and shunting acidification method for strong heterogeneous sandstone reservoir through sieve tube | |
| US4007789A (en) | Acidizing wells | |
| CN104232041A (en) | Low-leak-off high-corrosion acidification unblocking liquid used in oil-water well and preparation method of low-leak-off high-corrosion acidification unblocking liquid | |
| CN112358863B (en) | Chemical yield increasing liquid and method for low-permeability oil layer | |
| CN110242248B (en) | Sandstone reservoir water-plugging acidification process method | |
| CN107795307B (en) | A kind of method that heavy oil wells endogenous microbes improve well yield | |
| CN103305819B (en) | A kind of oil field tool chemical plating fluid and drilling tool corrosionproof protection method | |
| CN109236228B (en) | Gel temporary plugging method suitable for bridge plug staged multi-cluster fracturing | |
| CN116875296A (en) | Solid acid precursor for reservoir reformation | |
| CN108949132A (en) | A method of for the solid sand de-plugging treatment fluid of fine silt oil reservoir sand control, sand control treatment fluid system and with its sand control | |
| CN108084979A (en) | A kind of barium and strontium sulfate descaling agent | |
| US2156220A (en) | Chemical plugging of strata | |
| CN111396019A (en) | Method for optimizing online acidizing acid liquid consumption of water injection well | |
| CN115045643A (en) | Carbon dioxide fracturing-huff and puff combined production method applying surfactant | |
| CN113123772A (en) | Efficient acid distribution method considering time-space distribution characteristics of acid-etched crack flow conductivity | |
| CN112031721A (en) | Atomized acid acidification method suitable for improving oil field stratum permeability | |
| US11603490B2 (en) | Aqueous solution and method for use thereof | |
| CN111808590B (en) | Environment-friendly energy-increasing oil and water well blocking remover capable of rapidly reacting at normal temperature |
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 |