CN107858141A - A kind of coal-fired waste residue profile control agent and profile control method - Google Patents
A kind of coal-fired waste residue profile control agent and profile control method Download PDFInfo
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- CN107858141A CN107858141A CN201711172001.4A CN201711172001A CN107858141A CN 107858141 A CN107858141 A CN 107858141A CN 201711172001 A CN201711172001 A CN 201711172001A CN 107858141 A CN107858141 A CN 107858141A
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Abstract
The invention belongs to petroleum technology field, and in particular to a kind of coal-fired waste residue profile control agent and profile control method.The profile control agent includes two parts of high-permeability pay profile control agent and middle permeability pay profile control agent, by weight percentage, the water of coal-fired waste residue 70 80% of the described high-permeability pay profile control agent including the mesh of mesh number 50 100, high molecular polymer 10 20%, crosslinking agent 0.5 1.0%, stabilizer 0.05 0.08% and surplus；The coal-fired waste residue 40 50% of described middle permeability pay profile control agent including the mesh of mesh number 100 150, thickener 5 10%, dispersant 1 2%, the water of pH adjusting agent 0.1 0.2% and surplus.The coal-fired waste residue profile control agent of the present invention has the characteristics of stability is good, and plugging strength is high, and profile control success rate is high, the term of validity is long and effect of increasing production is good, can meet the profile control demand of different permeability oil reservoirs；Problem of environmental pollution caused by the present invention effectively solves row outside coal-fired discarded object and filled simultaneously, accordingly, it is capable to be applied in coal-fired waste residue recycling treatment and the water plugging and profile controlling technique of oil-water well generally.
Description
Technical field
The invention belongs to petroleum technology field, and in particular to a kind of coal-fired waste residue profile control agent and profile control method.
Background technology
The mode to be generated electricity using the chemical fuel such as coal, oil and natural gas contained energy is referred to as thermal power generation, in China
Because coal resources are compared with horn of plenty, it is most important thermal power generation mode to be generated electricity using coal resources, although thermal power generation function
It is stable, but existing much needs us constantly to go to solve the problems, such as：Such as resource consumes excessively, resource utilization is extremely low, right
Environmental disruption is very big, and environment is caused greatly to pollute；
Wherein because the burning of coal fuel source is insufficient, some cinder residues are had.Current most of heat power stations
In order to save processing cost, cost payout is reduced, directly pours into cinder residue in rivers, or directly will with land-fill method
Cinder fills, although can also grow some weeds on the soil after landfill, the cinder layer essence of deep layer is constant, is still coal
Slag residue, it can not change, and the invasion and attack script soil that cinder residual can all the year round, cause script soil constituent, soil texture
It is seriously damaged.
Cinder residue land-fill method not only breaks up soil, can also serious polluted source, containing many in cinder residue
Harmful substance, harmful substance mixes as water flows with underground water source in cinder residue during rainy day, influences water source, grow this with
Past, the life of the mankind must be affected.Therefore it is the object that the present invention studies regarding to the issue above.
Oil field water injection well during water flooding recovery generally carries out plugging and profile con-trol to improve involving for water filling using profile control agent
Volume, so as to improve the oil recovery factor of oil reservoir.Currently used profile control agent is polymer, but such profile control agent not only has
Cost of investment is high, and the problem of follow-up shipwreck is to handle be present.
The content of the invention
The shortcomings that in order to overcome above-mentioned prior art, it is an object of the invention to provide a kind of coal-fired waste residue profile control agent and tune
Method is cutd open, the coal-fired waste residue profile control agent is based on caused various coal-fired discarded objects during the coal burning in thermal power plant
Raw material, it is prepared by adding various reagents.The present invention not only meets the needs of Profile Control in Injection Well, effectively reduces simultaneously
Environmental pollution, so as to solve arranged outside coal-fired discarded object for a long time and landfill caused by problem of environmental pollution.
The invention discloses a kind of coal-fired waste residue profile control agent, and it includes high-permeability pay profile control agent and middle permeability pay profile control
Two parts of agent, by weight percentage,
Described high-permeability pay profile control agent includes coal-fired waste residue 70-80%, the high molecular polymer of mesh number 50-100 mesh
10-20%, crosslinking agent 0.5-1.0%, the water of stabilizer 0.05-0.08% and surplus.
Described middle permeability pay profile control agent includes coal-fired waste residue 40-50%, the thickener 5- of mesh number 100-150 mesh
10%th, dispersant 1-2%, pH adjusting agent 0.1-0.2% and surplus water.
Preferably, described high molecular polymer is polyacrylamide or polyethylene.
Preferably, described crosslinking agent is cumyl peroxide or benzoyl peroxide.
Preferably, described stabilizer is sodium hydroxide or potassium hydroxide.
Preferably, described thickener is one kind in xanthic acid, sodium alginate and bentonite.
Preferably, described dispersant is one kind in lignin salt, polycarboxylate and phosphate.
Preferably, described pH adjusting agent is one kind in citric acid, sorbic acid and oxalic acid.
A kind of preparation method of coal-fired waste residue profile control agent, wherein the preparation method of described high-permeability pay profile control agent is such as
Under：
(1) high molecular polymer of aforementioned proportion is added in the coal-fired waste residue of aforementioned proportion, stirred, stirring speed
Spend for 600-800rpm, mixing time 60-80min, high molecular polymer is evenly distributed in coal-fired waste residue, obtain containing height
The coal-fired waste residue of Molecularly Imprinted Polymer；
(2) crosslinking agent of aforementioned proportion is added in the aqueous solution of aforementioned proportion, heated while stirring, heating-up temperature is
50-60 DEG C, mixing speed 500-600rpm, mixing time 50-60min, make crosslinking agent dissolving in aqueous, contained
The aqueous solution of crosslinking agent；
(3) stabilizer of aforementioned proportion is added in the aqueous solution containing crosslinking agent, heated while stirring, heating-up temperature is
45-50 DEG C, mixing speed 400-500rpm, mixing time 30-40min, obtain the aqueous solution containing stabilizer and crosslinking agent；
(4) coal-fired waste residue of above-mentioned pbz polymer polymer is added in the aqueous solution containing stabilizer and crosslinking agent, side
Side stirring is heated, heating-up temperature is 50-60 DEG C, mixing speed 800-1000rpm, mixing time 40-50min, obtains height
Permeability pay profile control agent.
The preparation method of described middle permeability pay profile control agent is as follows：
(1) thickener of aforementioned proportion is added in the coal-fired waste residue of aforementioned proportion, stirred, mixing speed is
400-500rpm, mixing time 50-60min, makes thickener be evenly distributed in coal-fired waste residue, obtains the fire coal containing thickener
Waste residue；
(2) dispersant of aforementioned proportion is added in the aqueous solution of aforementioned proportion, heated while stirring, heating-up temperature is
35-40 DEG C, mixing speed 200-300rpm, mixing time 30-40min, make dispersant dissolving in aqueous, contained
The aqueous solution of dispersant；
(3) pH adjusting agent of aforementioned proportion is added in the aqueous solution containing dispersant, heated while stirring, heating-up temperature
For 40-45 DEG C, mixing speed 300-400rpm, mixing time 20-30min, pH value is obtained in neutral containing dispersant
The aqueous solution；
(4) the above-mentioned coal-fired waste residue containing thickener is added in the aqueous solution containing dispersant of the pH value in neutrality, Bian Jia
Hot side stirring, heating-up temperature is 45-60 DEG C, mixing speed 500-800rpm, mixing time 20-30min, obtains middle infiltration
Oil reservoir profile control agent.
A kind of method of profile control, it uses above-mentioned high-permeability pay profile control agent and middle permeability oil reservoir profile control agent to inject well
Middle profile control, is comprised the following steps that：
(1) preparation of profile control agent
Prepare high-permeability pay profile control agent and middle permeability pay profile control agent respectively according to the method described above.
(2) screening of oil reservoir is tested
The screening criteria for testing oil reservoir is as follows：Reservoir temperature is less than 90 DEG C, viscosity of crude less than 5000mPa.s, reservoir layer
Position is more than 3 layers, and water injection well quantity is more than 3 mouthfuls.
(3) high-permeability pay and middle permeability pay correspond to the determination of well
According to the height of permeability by the reservoir division for testing oil reservoir for it is high, neutralize low permeability pay, and it is corresponding to find out it
Water injection well.
(4) injection stage of profile control agent
High-permeability pay profile control agent is injected from water injection well corresponding to high-permeability pay, injection rate is every meter of high-permeability pay
Core intersection injects 10-20m3, injection rate 10-15m3/h。
Permeability pay profile control agent in therefrom being injected in water injection well corresponding to permeability pay, injection rate is middle every meter of permeability pay
Core intersection injects 5-10m3, injection rate 6-8m3/h。
(5) the following injected water stage
After the completion of high-permeability pay profile control agent and the injection of middle permeability pay profile control agent, normal water filling is proceeded by.
The method comprises the steps of firstly, preparing the high-permeability pay profile control agent containing coal-fired waste residue and middle permeability pay profile control agent, Thief zone oil
Layer profile control agent has the characteristics of particle diameter is big, profile control intensity is big and viscosity is high, and the particle diameter of middle permeability pay profile control agent is medium, profile control is strong
Spend the characteristics of medium and viscosity is medium；Secondly, the oil reservoir for testing oil reservoir is divided into according to the height of experiment reservoir oil layer permeability
High permeability oil reservoir, middle permeability oil reservoir and low-permeability oil reservoir, and find out its corresponding water injection well；From high permeability oil reservoir pair
The highly viscous high-permeability pay profile control agent of high particle diameter is injected in the water injection well answered, is therefrom noted in water injection well corresponding to permeability oil reservoir
Enter medium grain size and the middle permeability pay profile control agent of viscosity, form a protection slug for having the high temperature resistant of level, resistance to erosion, have
Senior middle school's permeability pay of effect ground blocking test oil reservoir, so that the effectively swept volume of expanding test reservoir flooding water, Jin Erti
The oil recovery factor of height experiment oil reservoir.The present invention is with stability is good, plugging strength is high, flushing resistance is good, profile control is successful
The characteristics of rate is high, the term of validity is long and effect of increasing production is good, the profile control demand of different permeability oil reservoirs can be met.
Compared with prior art, the invention has the advantages that and beneficial effect：
(1) raw material sources of coal-fired waste residue profile control agent of the invention are extensive, are easily obtained, cost is cheap；
(2) coal-fired waste residue profile control agent preparation technology of the invention is simple, workable, and it is low to prepare cost；
(3) coal-fired waste residue profile control agent of the invention has that stability is good, and plugging strength is high, and flushing resistance is good, profile control
The characteristics of success rate is high, the term of validity is long and effect of increasing production is good, the term of validity is more than 40 months, improves recovery ratio and is more than 23%, input
Output ratio is more than 1: 10, can meet the profile control demand of different permeability oil reservoirs；
(4) problem of environmental pollution caused by the present invention effectively solves row outside coal-fired discarded object and filled, has obvious
Economic benefit and social benefit.
Embodiment
With reference to specific embodiment, the present invention is described further, but protection scope of the present invention is not limited in
This：
Embodiment 1
A kind of coal-fired waste residue profile control agent and preparation method are present embodiments provided, wherein coal-fired waste residue profile control agent includes height
Permeability pay profile control agent A1With middle permeability pay profile control agent B1Two parts, by weight percentage,
Described high-permeability pay profile control agent A1Include coal-fired waste residue 70%, the high molecular polymer of mesh number 50-80 mesh
10%th, the water of crosslinking agent 0.5%, stabilizer 0.05% and surplus.
Described middle permeability pay profile control agent B1Coal-fired waste residue 40%, thickener 5% including mesh number 100-120 mesh, divide
The water of powder 1.0%, pH adjusting agent 0.1% and surplus.
Described high molecular polymer is polyacrylamide.
Described crosslinking agent is cumyl peroxide.
Described stabilizer is sodium hydroxide.
Described thickener is xanthic acid.
Described dispersant is lignin salt.
Described pH adjusting agent is citric acid.
A kind of preparation method of coal-fired waste residue profile control agent, wherein high-permeability pay profile control agent A1 preparation method are as follows：
(1) macromolecule copolymer polyacrylamide of aforementioned proportion is added in the coal-fired waste residue of aforementioned proportion, stirred
Uniformly, mixing speed 600rpm, mixing time 60min, makes macromolecule copolymer polyacrylamide be evenly distributed fire coal
In waste residue, the coal-fired waste residue of pbz polymer polymer poly acrylamide is obtained；
(2) the crosslinking agent cumyl peroxide of aforementioned proportion is added in the aqueous solution of aforementioned proportion, stirred in heating
Mix, heating-up temperature is 50 DEG C, mixing speed 500rpm, mixing time 50min, dissolves crosslinking agent cumyl peroxide
In aqueous, the aqueous solution of the cumyl peroxide containing crosslinking agent is obtained；
(3) the stabilizer sodium hydroxide of aforementioned proportion is added in the aqueous solution of the cumyl peroxide containing crosslinking agent,
Heat while stirring, heating-up temperature is 45 DEG C, mixing speed 400rpm, mixing time 30min, obtains hydrogen-oxygen containing stabilizer
Change the aqueous solution of sodium and crosslinking agent cumyl peroxide；
(4) coal-fired waste residue of above-mentioned pbz polymer polymer poly acrylamide is added to sodium hydroxide containing stabilizer and friendship
In the aqueous solution for joining agent cumyl peroxide, heat while stirring, heating-up temperature is 50 DEG C, mixing speed 800rpm, is stirred
It is 40min to mix the time, obtains high-permeability pay profile control agent A1。
Middle permeability pay profile control agent B1Preparation method it is as follows：
(1) the thickener xanthic acid of aforementioned proportion is added in the coal-fired waste residue of aforementioned proportion, stirred, stirring speed
Spend for 400rpm, mixing time 50min, thickener xanthic acid is evenly distributed in coal-fired waste residue, obtain yellow containing thickener
The coal-fired waste residue of ortho acid；
(2) the dispersant lignin salt of aforementioned proportion is added in the aqueous solution of aforementioned proportion, heated while stirring, heated
Temperature is 35 DEG C, mixing speed 200rpm, mixing time 30min, makes the dissolving of dispersant lignin salt in aqueous, obtains
To the aqueous solution of the lignin salt containing dispersant；
(3) the pH adjusting agent citric acid of aforementioned proportion is added in the aqueous solution of the lignin salt containing dispersant, side heating
Side is stirred, and heating-up temperature is 40 DEG C, mixing speed 300rpm, mixing time 20min, obtains pH value in neutral containing scattered
The aqueous solution of agent lignin salt；
(4) coal-fired waste residue of the above-mentioned xanthic acid containing thickener is added to pH value in the neutral lignin salt containing dispersant
In the aqueous solution, heat while stirring, heating-up temperature is 45 DEG C, mixing speed 500rpm, mixing time 20min, in obtaining
Permeability pay profile control agent B1。
Embodiment 2
A kind of coal-fired waste residue profile control agent and preparation method are present embodiments provided, wherein coal-fired waste residue profile control agent includes height
Permeability pay profile control agent A2With middle permeability oil reservoir profile control agent B2Two parts, by weight percentage,
Described high-permeability pay profile control agent A2Include coal-fired waste residue 75%, the high molecular polymer of mesh number 60-80 mesh
16%th, the water of crosslinking agent 0.6%, stabilizer 0.06% and surplus.
Described middle permeability pay profile control agent B2Coal-fired waste residue 45%, thickener 8% including mesh number 120-140 mesh, divide
The water of powder 1.5%, pH adjusting agent 0.16% and surplus.
Described high molecular polymer is polyacrylamide.
Described crosslinking agent is benzoyl peroxide.
Described stabilizer is potassium hydroxide.
Described thickener is sodium alginate.
Described dispersant is polycarboxylate.
Described pH adjusting agent is sorbic acid.
A kind of preparation method of coal-fired waste residue profile control agent, wherein high-permeability pay profile control agent A2Preparation method it is as follows：
(1) macromolecule copolymer polyacrylamide of aforementioned proportion is added in the coal-fired waste residue of aforementioned proportion, stirred
Uniformly, mixing speed 700rpm, mixing time 70min, makes macromolecule copolymer polyacrylamide be evenly distributed fire coal
In waste residue, the coal-fired waste residue of pbz polymer polymer poly acrylamide is obtained；
(2) the crosslinking agent benzoyl peroxide of aforementioned proportion is added in the aqueous solution of aforementioned proportion, heated while stirring,
Heating-up temperature is 55 DEG C, mixing speed 550rpm, mixing time 56min, crosslinking agent benzoyl peroxide is dissolved in water
In solution, the aqueous solution of the benzoyl peroxide containing crosslinking agent is obtained；
(3) the stabilizer potassium hydroxide of aforementioned proportion is added in the aqueous solution of the benzoyl peroxide containing crosslinking agent, side
Side stirring is heated, heating-up temperature is 47 DEG C, mixing speed 460rpm, mixing time 32min, obtains hydroxide containing stabilizer
The aqueous solution of potassium and crosslinking agent benzoyl peroxide；
(4) coal-fired waste residue of above-mentioned pbz polymer polymer poly acrylamide is added to potassium hydroxide containing stabilizer and friendship
In the aqueous solution for joining agent benzoyl peroxide, heat while stirring, heating-up temperature is 56 DEG C, mixing speed 900rpm, stirring
Time is 43min, obtains high-permeability pay profile control agent A2.
Middle permeability pay profile control agent B2Preparation method it is as follows：
(1) the thickener sodium alginate of aforementioned proportion is added in the coal-fired waste residue of aforementioned proportion, stirred, stirred
Speed is 450rpm, mixing time 56min, thickener sodium alginate is evenly distributed in coal-fired waste residue, is obtained containing thickening
The coal-fired waste residue of agent sodium alginate；
(2) dispersant polycarboxylate of aforementioned proportion is added in the aqueous solution of aforementioned proportion, heated while stirring, heated
Temperature is 38 DEG C, mixing speed 260rpm, mixing time 35min, makes dispersant polycarboxylate dissolving in aqueous, obtains
To the aqueous solution containing dispersant polycarboxylate；
(3) the pH adjusting agent sorbic acid of aforementioned proportion is added in the aqueous solution containing dispersant polycarboxylate, side heating
Side is stirred, and heating-up temperature is 42 DEG C, mixing speed 330rpm, mixing time 26min, obtains pH value in neutral containing scattered
The aqueous solution of agent polycarboxylate；
(4) coal-fired waste residue of the above-mentioned sodium alginate containing thickener is added to pH value and contains dispersant polycarboxylate in neutral
The aqueous solution in, heat while stirring, heating-up temperature be 50 DEG C, mixing speed 700rpm, mixing time 25min, obtain
Middle permeability pay profile control agent B2。
Embodiment 3
A kind of coal-fired waste residue profile control agent and preparation method are present embodiments provided, wherein coal-fired waste residue profile control agent includes height
Permeability pay profile control agent A3With middle permeability oil reservoir profile control agent B3Two parts, by weight percentage,
Described high-permeability pay profile control agent A3Include coal-fired waste residue 80%, the high molecular polymer of mesh number 80-100 mesh
20%th, the water of crosslinking agent 1.0%, stabilizer 0.08% and surplus.
Described middle permeability pay profile control agent B3Coal-fired waste residue 50%, thickener 10% including mesh number 130-150 mesh, divide
The water of powder 2%, pH adjusting agent 0.2% and surplus.
Described high molecular polymer is polyethylene.
Described crosslinking agent is benzoyl peroxide.
Described stabilizer is potassium hydroxide.
Described thickener is bentonite.
Described dispersant is phosphate.
Described pH adjusting agent is oxalic acid.
A kind of preparation method of coal-fired waste residue profile control agent, wherein high-permeability pay profile control agent A3Preparation method it is as follows：
(1) the high molecular polymer polyethylene of aforementioned proportion is added in the coal-fired waste residue of aforementioned proportion, stirred,
Mixing speed is 800rpm, mixing time 80min, high molecular polymer polyethylene is evenly distributed in coal-fired waste residue, obtains
To the coal-fired waste residue of pbz polymer polymer polyethylene；
(2) the crosslinking agent benzoyl peroxide of aforementioned proportion is added in the aqueous solution of aforementioned proportion, heated while stirring,
Heating-up temperature is 60 DEG C, mixing speed 600rpm, mixing time 60min, crosslinking agent benzoyl peroxide is dissolved in water
In solution, the aqueous solution of the benzoyl peroxide containing crosslinking agent is obtained；
(3) the stabilizer potassium hydroxide of aforementioned proportion is added in the aqueous solution of the benzoyl peroxide containing crosslinking agent, side
Side stirring is heated, heating-up temperature is 50 DEG C, mixing speed 500rpm, mixing time 40min, obtains hydroxide containing stabilizer
The aqueous solution of potassium and crosslinking agent benzoyl peroxide；
(4) coal-fired waste residue of above-mentioned pbz polymer polymer polyethylene is added to potassium hydroxide containing stabilizer and crosslinking agent
In the aqueous solution of benzoyl peroxide, heat while stirring, heating-up temperature is 60 DEG C, mixing speed 1000rpm, mixing time
For 50min, high-permeability pay profile control agent A is obtained3。
Middle permeability pay profile control agent B3Preparation method it is as follows：
(1) the thickener bentonite of aforementioned proportion is added in the coal-fired waste residue of aforementioned proportion, stirred, stirring speed
Spend for 500rpm, mixing time 60min, thickener bentonite is evenly distributed in coal-fired waste residue, obtain swollen containing thickener
Moisten the coal-fired waste residue of soil；
(2) the dispersant phosphate of aforementioned proportion is added in the aqueous solution of aforementioned proportion, heated while stirring, heating temperature
Spend for 40 DEG C, mixing speed 300rpm, mixing time 40min, make the dissolving of dispersant phosphate in aqueous, contained
The phosphatic aqueous solution of dispersant；
(3) the pH adjusting agent oxalic acid of aforementioned proportion is added to containing in the phosphatic aqueous solution of dispersant, stirred in heating
Mix, heating-up temperature is 45 DEG C, mixing speed 400rpm, mixing time 30min, obtains pH value in neutral phosphorus containing dispersant
The aqueous solution of hydrochlorate；
(4) the above-mentioned bentonitic coal-fired waste residue containing thickener is added to pH value in the neutral phosphatic water containing dispersant
In solution, heat while stirring, heating-up temperature is 60 DEG C, mixing speed 800rpm, mixing time 30min, is oozed in obtaining
Saturating oil reservoir profile control agent B3。
Embodiment 4
Certain oil reservoir E3, 72 DEG C of reservoir temperature, viscosity of crude 1532mPa.s；Reservoir layer position is 5 layers, respectively oil reservoir E31, oil
Layer E32, oil reservoir E33, oil reservoir E34, oil reservoir E35, the permeability of oil reservoir is respectively 500mD, 400mD, 850mD, 1100mD, 1200mD,
The thickness of oil reservoir is respectively 3.2m, 4.5m, 4.0m, 3.0m, 6.3m, and well quantity is 5 mouthfuls, respectively ES1、ES2、ES3、ES4、
ES5；Test oil reservoir comprehensive water cut 96.3%；Reservoir geology reserves are 7.2 × 105t.Utilize high-permeability pay profile control agent A1With in
Permeability pay profile control agent B1Implement the profile control of the oil reservoir, the method for specific profile control is as follows：
(1) configuration of profile control agent
Method according to the present invention prepares high-permeability pay profile control agent A respectively1With middle permeability pay profile control agent B1(see implementing
Example 1).
(2) screening of oil reservoir is tested
The screening criteria for testing oil reservoir is as follows：Reservoir temperature is less than 90 DEG C, viscosity of crude less than 5000mPa.s, reservoir layer
Position is more than 3 layers, and water injection well quantity is more than 3 mouthfuls.Test oil reservoir E3Meet the screening criteria of oil reservoir of the present invention.
(3) high-permeability pay and middle permeability pay correspond to the determination of well
According to the height of permeability by the reservoir division for testing oil reservoir for it is high, neutralize low permeability pay, and it is corresponding to find out it
Water injection well, be shown in Table 1.
Table 1 tests oil reservoir E3The division of oil reservoir and corresponding well
| Oil reservoir | Permeability, mD | Grade classification | Corresponding well |
| E31 | 500 | It is low | ES2 |
| E32 | 400 | It is low | ES1 |
| E33 | 850 | In | ES5 |
| E34 | 1100 | It is high | ES4 |
| E35 | 1200 | It is high | ES3 |
(4) injection stage of profile control agent
From high-permeability pay E34And E35Corresponding water injection well ES4And ES3Middle injection high-permeability pay profile control agent A1, injection rate
It is every meter of core intersection injection 10m of high-permeability pay3, water injection well ES4And ES3Injection rate is respectively 30m3、63m3；Injection rate
It is 10m3/h。
Therefrom permeability pay E33E in corresponding water injection wellS5Permeability pay profile control agent B in injection1, injection rate is middle infiltration oil
Every meter of core intersection injection 5m of layer3, injection rate 20m3；Injection rate 6m3/h。
(5) the following injected water stage
High-permeability pay profile control agent A1With middle permeability pay profile control agent B1After the completion of (embodiment 1) injection, proceed by normal
Water filling.
Test effect is evaluated：After field test terminates, oil reservoir E is tested3It is aqueous drop to 81.5%, it is aqueous to have dropped
14.8 percentage points, increase oil 1.67 × 105T, recovery ratio 23.2% is improved, the term of validity is 42 months, input-output ratio 1:
10.3, field test results are good.
Embodiment 5
Certain oil reservoir E5, 68 DEG C of reservoir temperature, viscosity of crude 2130mPa.s；Reservoir layer position is 4 layers, respectively oil reservoir E51, oil
Layer E52, oil reservoir E53, oil reservoir E54, the permeability of oil reservoir is respectively 1150mD, 750mD, 320mD, 300mD, and the thickness of oil reservoir is distinguished
For 5.0m, 4.2m, 4.5m, 2.0m, well quantity is 4 mouthfuls, respectively SE51、SE52、SE53、SE54；Test oil reservoir comprehensive water cut
95.2%；Reservoir geology reserves are 9.0 × 105t.Utilize high-permeability pay profile control agent A2 and middle permeability oil reservoir profile control agent B2It is real
The profile control of the oil reservoir is applied, the method for specific profile control is as follows：
(1) configuration of profile control agent
Method according to the present invention prepares high-permeability pay profile control agent A respectively2With middle permeability pay profile control agent B2(see implementing
Example 2).
(2) screening of oil reservoir is tested
The screening criteria for testing oil reservoir is as follows：Reservoir temperature is less than 90 DEG C, viscosity of crude less than 5000mPa.s, reservoir layer
Position is more than 3 layers, and water injection well quantity is more than 3 mouthfuls.Test oil reservoir E5Meet the screening criteria of oil reservoir of the present invention.
(3) high-permeability pay and middle permeability pay correspond to the determination of well
According to the height of permeability by the reservoir division for testing oil reservoir for it is high, neutralize low permeability pay, and it is corresponding to find out it
Water injection well, be shown in Table 2.
Table 2 tests oil reservoir E5The division of oil reservoir and corresponding well
| Oil reservoir | Permeability, mD | Grade classification | Corresponding well |
| E51 | 1150 | It is high | SE54 |
| E52 | 750 | In | SE52 |
| E53 | 320 | It is low | SE51 |
| E54 | 300 | It is low | SE53 |
(4) injection stage of profile control agent
From high-permeability pay E51Corresponding water injection well SE54Middle injection high-permeability pay profile control agent A2(embodiment 2), injection rate
15m is injected for every meter of core intersection of high-permeability pay3, water injection well SE54Injection rate is respectively 75m3；Injection rate is 12m3/h。
Therefrom permeability pay E52SE in corresponding water injection well52Permeability pay profile control agent B in injection2(embodiment 2), injection rate
8m is injected for middle every meter of core intersection of permeability pay3, injection rate 33.6m3；Injection rate 7m3/h。
(5) the following injected water stage
High-permeability pay profile control agent A2 and middle permeability pay profile control agent B2After the completion of (embodiment 2) injection, proceed by just
Normal water filling.
Test effect is evaluated：After field test terminates, oil reservoir E is tested5It is aqueous drop to 81.2%, it is aqueous to have dropped
14.0 percentage points, increase oil 2.178 × 105T, recovery ratio 24.2% is improved, the term of validity is 45 months, input-output ratio 1:
11.9, field test results are good.
Embodiment 6
Certain oil reservoir E8, 80 DEG C of reservoir temperature, viscosity of crude 1982mPa.s；Reservoir layer position is 4 layers, respectively oil reservoir E81, oil
Layer E82, oil reservoir E83, oil reservoir E84, the permeability of oil reservoir is respectively 420mD, 360mD, 800mD, 1500mD, and the thickness of oil reservoir is distinguished
For 6.2m, 4.3m, 5.6m, 3.9m, well quantity is 4 mouthfuls, respectively SE81、SE82、SE83、SE84；Test oil reservoir comprehensive water cut
97.0%；Reservoir geology reserves are 5.3 × 105t.Utilize high-permeability pay profile control agent A3With middle permeability oil reservoir profile control agent B3It is real
The profile control of the oil reservoir is applied, the method for specific profile control is as follows：
(1) configuration of profile control agent
Method according to the present invention prepares high-permeability pay profile control agent A respectively3With middle permeability pay profile control agent B3(embodiment
3)。
(2) screening of oil reservoir is tested
The screening criteria for testing oil reservoir is as follows：Reservoir temperature is less than 90 DEG C, viscosity of crude less than 5000mPa.s, reservoir layer
Position is more than 3 layers, and water injection well quantity is more than 3 mouthfuls.Test oil reservoir E8Meet the screening criteria of oil reservoir of the present invention.
(3) high-permeability pay and middle permeability pay correspond to the determination of well
According to the height of permeability by the reservoir division for testing oil reservoir for it is high, neutralize low permeability pay, and it is corresponding to find out it
Water injection well, be shown in Table 3.
Table 3 tests oil reservoir E8The division of oil reservoir and corresponding well
(4) injection stage of profile control agent
From high-permeability pay E84Corresponding water injection well SE82Middle injection high-permeability pay profile control agent A3(embodiment 3), injection rate
20m is injected for every meter of core intersection of high-permeability pay3, water injection well SE82Injection rate is respectively 78m3；Injection rate is 15m3/h。
Therefrom permeability pay E83SE in corresponding water injection well83Permeability pay profile control agent B in injection3(embodiment 3), injection rate
10m is injected for middle every meter of core intersection of permeability pay3, injection rate 56m3；Injection rate 8m3/h。
(5) the following injected water stage
High-permeability pay profile control agent A3With middle permeability pay profile control agent B3After the completion of (embodiment 3) injection, proceed by normal
Water filling.
Test effect is evaluated：After field test terminates, oil reservoir E is tested8It is aqueous drop to 80.2%, it is aqueous to have dropped
16.8 percentage points, increase oil 1.325 × 105T, recovery ratio 25.0% is improved, the term of validity is 46 months, input-output ratio 1:
11.2, field test results are good.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (9)
1. a kind of coal-fired waste residue profile control agent, it is characterised in that described profile control agent includes high-permeability pay profile control agent and middle infiltration
Two parts of rate oil reservoir profile control agent, by weight percentage,
Described high-permeability pay profile control agent includes coal-fired waste residue 70-80%, the high molecular polymer 10- of mesh number 50-100 mesh
20%th, crosslinking agent 0.5-1.0%, stabilizer 0.05-0.08% and surplus water；
Coal-fired waste residue 40-50% of the described middle permeability pay profile control agent including mesh number 100-150 mesh, thickener 5-10%, divide
Powder 1-2%, pH adjusting agent 0.1-0.2% and surplus water.
2. coal-fired waste residue profile control agent according to claim 1, it is characterised in that described high molecular polymer is polypropylene
Acid amides or polyethylene.
3. coal-fired waste residue profile control agent according to claim 1 or 2, it is characterised in that described crosslinking agent is that peroxidating two is different
Propyl benzene or benzoyl peroxide.
4. coal-fired waste residue profile control agent according to claim 1 or 2, it is characterised in that described stabilizer be sodium hydroxide or
Potassium hydroxide.
5. coal-fired waste residue profile control agent according to claim 1 or 2, it is characterised in that described thickener is xanthic acid, sea
One kind in mosanom and bentonite.
6. coal-fired waste residue profile control agent according to claim 5, it is characterised in that described dispersant is lignin salt, poly- carboxylic
One kind in hydrochlorate and phosphate.
7. coal-fired waste residue profile control agent according to claim 5, it is characterised in that described pH adjusting agent is citric acid, sorb
One kind in acid and oxalic acid.
A kind of 8. preparation method of coal-fired waste residue profile control agent, it is characterised in that the preparation side of described high-permeability pay profile control agent
Method is as follows：
(1) high molecular polymer of aforementioned proportion is added in the coal-fired waste residue of aforementioned proportion, stirred, mixing speed is
600-800rpm, mixing time 60-80min, makes high molecular polymer be distributed evenly in coal-fired waste residue, obtains containing high score
The coal-fired waste residue of sub- polymer；
(2) crosslinking agent of aforementioned proportion is added in the water of aforementioned proportion, heated while stirring, heating-up temperature is 50-60 DEG C, is stirred
It is 500-600rpm, mixing time 50-60min to mix speed, makes crosslinking agent dissolving in aqueous, obtains the water containing crosslinking agent
Solution；
(3) stabilizer of aforementioned proportion is added in the aqueous solution containing crosslinking agent, heated while stirring, heating-up temperature 45-
50 DEG C, mixing speed 400-500rpm, mixing time 30-40min, obtain the aqueous solution containing stabilizer and crosslinking agent；
(4) coal-fired waste residue of above-mentioned pbz polymer polymer is added in the aqueous solution containing stabilizer and crosslinking agent, side heating
Side is stirred, and heating-up temperature is 50-60 DEG C, mixing speed 800-1000rpm, mixing time 40-50min, obtains Thief zone
Oil reservoir profile control agent；
The preparation method of described middle permeability pay profile control agent is as follows：
(1) thickener of aforementioned proportion is added in the coal-fired waste residue of aforementioned proportion, stirred, mixing speed 400-
500rpm, mixing time 50-60min, makes thickener be evenly distributed in coal-fired waste residue, obtains the fire coal containing thickener and gives up
Slag；
(2) dispersant of aforementioned proportion is added in the aqueous solution of aforementioned proportion, heated while stirring, heating-up temperature 35-40
DEG C, mixing speed 200-300rpm, mixing time 30-40min, make dispersant dissolving in aqueous, obtain containing scattered
The aqueous solution of agent；
(3) pH adjusting agent of aforementioned proportion is added in the aqueous solution containing dispersant, heated while stirring, heating-up temperature is
40-45 DEG C, mixing speed 300-400rpm, mixing time 20-30min, pH value is obtained in the neutral water containing dispersant
Solution；
(4) the above-mentioned coal-fired waste residue containing thickener is added in the aqueous solution containing dispersant of the pH value in neutrality, in heating
Stirring, heating-up temperature are 45-60 DEG C, mixing speed 500-800rpm, mixing time 20-30min, obtain middle permeability pay
Profile control agent.
A kind of 9. method of profile control, it is characterised in that described profile control method comprises the following steps that：
(1) preparation of profile control agent
Prepare high-permeability pay profile control agent and middle permeability pay profile control agent；
(2) screening of oil reservoir is tested
The screening criteria for testing oil reservoir is as follows：Reservoir temperature less than 90 DEG C, viscosity of crude it is big less than 5000mPa.s, reservoir layer position
In 3 layers, water injection well quantity is more than 3 mouthfuls；
(3) high-permeability pay and middle permeability pay correspond to the determination of well
According to the height of permeability by the reservoir division for testing oil reservoir for it is high, neutralize low permeability pay, and find out and noted corresponding to its
Well；
(4) injection stage of profile control agent
High-permeability pay profile control agent is injected from water injection well corresponding to high-permeability pay, injection rate is high-permeability pay per rice bran oil layer
Thickness injects 10-20m3, injection rate 10-15m3/h；
Permeability pay profile control agent in therefrom being injected in water injection well corresponding to permeability pay, injection rate are middle permeability pay per rice bran oil layer
Thickness injects 5-10m3, injection rate 6-8m3/h；
(5) the following injected water stage
After the completion of high-permeability pay profile control agent and the injection of middle permeability pay profile control agent, normal water filling is proceeded by.
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| CN110205109A (en) * | 2019-07-10 | 2019-09-06 | 中海石油(中国)有限公司秦皇岛32-6作业公司 | A kind of low-viscosity gel water shutoff agent of resisting high temperature, high salt |
| CN113528105A (en) * | 2020-04-17 | 2021-10-22 | 中石化石油工程技术服务有限公司 | Geopolymer-based dual plugging agent and preparation and application methods thereof |
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| CN113528105A (en) * | 2020-04-17 | 2021-10-22 | 中石化石油工程技术服务有限公司 | Geopolymer-based dual plugging agent and preparation and application methods thereof |
| CN113528105B (en) * | 2020-04-17 | 2022-09-09 | 中石化石油工程技术服务有限公司 | Geopolymer-based dual plugging agent and preparation and application methods thereof |
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