CN107794017A - Clastic rock low pressure Oil/gas Well reservoir protection liquid and its preparation method and application - Google Patents
Clastic rock low pressure Oil/gas Well reservoir protection liquid and its preparation method and application Download PDFInfo
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- CN107794017A CN107794017A CN201711039684.6A CN201711039684A CN107794017A CN 107794017 A CN107794017 A CN 107794017A CN 201711039684 A CN201711039684 A CN 201711039684A CN 107794017 A CN107794017 A CN 107794017A
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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
- C09K8/56—Compositions for consolidating loose sand or the like around wells without excessively decreasing the permeability thereof
- C09K8/57—Compositions based on water or polar solvents
- C09K8/575—Compositions based on water or polar solvents containing organic compounds
- C09K8/5751—Macromolecular compounds
- C09K8/5755—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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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
- C09K8/56—Compositions for consolidating loose sand or the like around wells without excessively decreasing the permeability thereof
- C09K8/57—Compositions based on water or polar solvents
- C09K8/575—Compositions based on water or polar solvents containing organic compounds
- C09K8/5751—Macromolecular compounds
- C09K8/5753—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Abstract
The present invention relates to Oil/gas Well reservoir protection liquid technical field; it is a kind of clastic rock low pressure Oil/gas Well reservoir protection liquid and its preparation method and application, the clastic rock low pressure Oil/gas Well reservoir protection liquid raw material includes mixture, phenolic resin and the resorcinol of both mixture, hexamethylenetetramine and hydroquinones of both acrylamide copolymer, chromic acetate and organic zirconium and mixture, thiocarbamide, the water of polyethyleneimine three.Clastic rock low pressure Oil/gas Well reservoir protection liquid energy of the present invention enough effectively protects clastic rock low pressure Oil/gas Well reservoir; it is minimum or do not miss using the wastage of the clastic rock low pressure Oil/gas Well of clastic rock low pressure Oil/gas Well reservoir protection liquid of the present invention; bearing capacity significantly improves; gaslift expense can be saved; oil-production capacity recovery rate reaches 100%; and the cost of clastic rock low pressure Oil/gas Well reservoir protection liquid of the present invention is relatively low, there is more preferable application prospect.
Description
Technical field
The present invention relates to Oil/gas Well reservoir protection liquid technical field, be a kind of clastic rock low pressure Oil/gas Well reservoir protection liquid and
Its preparation method and application.
Background technology
Reservoir protection work is always an important topic in oilfield exploitation procedure, and clastic rock gas condensate reservoir is even more such as
This.Clastic rock condensate gas well, which repaiies well killing fluid leakage in Completion Operations, in addition to causing the incompatibilities such as water-sensitive and injuring, can also produce liquid
Lock injury, causes gas phase permeability drastically to decline, and gas well deliverability is greatly reduced, and the ancillary method such as gaslift induced flow takes after increase well workover
With.Low pressure well repaiies that completion practice pressure difference is big, and wastage is big, and reservoir damage is more serious, and gaslift expense is higher, and reservoir protection is particularly heavy
Will.
Reservoir protection liquid technology is roughly divided into two classes at present：Filtrate reducing, compatibility type and shielding temporarily stifled type are improved, in Tarim Basin
The extra-high temperature clastic rock gas condensate reservoirs such as the refined carat in basin, big flooded dam（More than 140 DEG C of more than well depth 5000m, temperature）, early stage should
With filtrate reducing, improve the Low Damage reservoir protection liquid of compatibility type and the nothing of the temporary stifled type of shielding（It is low）Seepage well killing fluid.
（1）Low Damage reservoir protection liquid.Principle is mainly filtrate reducing and improves compatibility, and its price is relatively low, in early stage
Lamination force coefficient is applied when higher, and production capacity recovery rate can reach 90%, but later stage reservoir pressure coefficient under development be down to 0.9 with
After lower, it is impossible to which effectively control well killing fluid wastage, reservoir protection effect are deteriorated.
（2）Nothing（It is low）Seepage well killing fluid.Principle is to be formed using high water absorption high polymer material on eyelet or the borehole wall manually
Borehole wall temporarily blocking layer, the leakage of well killing fluid is prevented, with the producing pressure differential of very little after operation（About 1MPa）Temporarily blocking layer is released to resume production,
Reach the purpose of protection reservoir.Do not missed substantially in actual application, production capacity recovery rate can reach 95%, and effect is preferable, but store up
Layer protection liquid price is higher（250000 yuan/well）, under current low oil price situation, it is difficult to popularization and application.
In summary, current filtrate reducing type and temporarily stifled type reservoir protection liquid, due to can not effectively prevent leakage and cost
It the problems such as high, can not meet under low oil price situation, the requirement of low pressure condensate gas well reservoir protection, it is a kind of new to be badly in need of research
The cost-effective reservoir protection liquid of type.
The content of the invention
The invention provides a kind of clastic rock low pressure Oil/gas Well reservoir protection liquid and its preparation method and application, overcome
The deficiency of prior art is stated, it can effectively solve existing reservoir protection liquid and have that wastage is larger and reservoir is protected in use
Protect the problem of liquid is with high costs.
One of technical scheme is realized by following measures：A kind of clastic rock low pressure Oil/gas Well reservoir is protected
Liquid is protected, raw materials by weight meter includes the mixture of both acrylamide copolymer 1% to 4%, chromic acetate and organic zirconium
0.04% to 0.08%, the mixture 0.4% to 0.7%, phenolic resin and resorcinol of both hexamethylenetetramine and hydroquinones
Mixture 0.05% to 5%, thiocarbamide 0.01% to 0.04% with polyethyleneimine three, surplus are water.
Here is the further optimization and/or improvements to one of foregoing invention technical scheme：
Above-mentioned raw materials include the mixture of both acrylamide copolymer 2%, chromic acetate and organic zirconium by weight percentage
0.05%th, the mixture 0.5%, phenolic resin and resorcinol and polyethyleneimine three of both hexamethylenetetramine and hydroquinones
Mixture 0.1%, the thiocarbamide 0.02% of person, surplus is water.
The mass ratio of above-mentioned chromic acetate and organic zirconium is 2 to 3:0.5 to 1, the quality of hexamethylenetetramine and hydroquinones
Than for 4 to 6:1 to 2, phenolic resin and resorcinol and the mass ratio of polyethyleneimine three are 1 to 4:2 to 5:1 to 2.
Above-mentioned clastic rock low pressure Oil/gas Well reservoir protection liquid, is obtained in the steps below：The first step, add into the desired amount of water
Enter the desired amount of thiocarbamide and the desired amount of acrylamide copolymer, be sufficiently stirred to obtain mixed once solution；Second step, to once
The mixture of both the desired amount of hexamethylenetetramine and hydroquinones and the desired amount of phenolic resin are added in mixed solution
With resorcinol and the mixture of polyethyleneimine three, it is sufficiently stirred to obtain secondary mixed solution；3rd step, to secondary mixing
The mixture of the desired amount of chromic acetate and organic zirconium is added in solution, is sufficiently stirred to obtain mixed solution three times, when mixing three times
Clastic rock low pressure Oil/gas Well reservoir protection liquid is obtained after solution gel.
The two of technical scheme are realized by following measures：A kind of chip described in one of technical scheme
The preparation method of rock low pressure Oil/gas Well reservoir protection liquid, is carried out in the steps below：The first step, into the desired amount of water needed for addition
The thiocarbamide of amount and the desired amount of acrylamide copolymer, it is sufficiently stirred to obtain mixed once solution；Second step, it is molten to mixed once
The mixture and the desired amount of phenolic resin and isophthalic of both the desired amount of hexamethylenetetramine and hydroquinones are added in liquid
Diphenol and the mixture of polyethyleneimine three, it is sufficiently stirred to obtain secondary mixed solution；3rd step, into secondary mixed solution
The mixture of the desired amount of chromic acetate and organic zirconium is added, is sufficiently stirred to obtain mixed solution three times, when mixed solution glue three times
Clastic rock low pressure Oil/gas Well reservoir protection liquid is obtained after solidifying.
The three of technical scheme are realized by following measures：A kind of chip described in one of technical scheme
Application of the rock low pressure Oil/gas Well reservoir protection liquid in protection clastic rock low pressure Oil/gas Well reservoir.
Clastic rock low pressure Oil/gas Well reservoir protection liquid energy of the present invention enough effectively protects the storage of clastic rock low pressure Oil/gas Well
Layer, using the wastage of the clastic rock low pressure Oil/gas Well of clastic rock low pressure Oil/gas Well reservoir protection liquid of the present invention it is minimum or
Do not miss, bearing capacity significantly improves, and can save gaslift expense, and oil-production capacity recovery rate reaches 100%, and institute of the present invention
The cost for the clastic rock low pressure Oil/gas Well reservoir protection liquid stated is relatively low, has more preferable application prospect, makes of the present invention broken
Bits rock low pressure Oil/gas Well reservoir protection liquid energy is enough in domestic and international deep layer high temperature clastic rock gas condensate reservoir, after in exploitation
The low-pressure gas well advantage of phase becomes apparent, and can effectively protect reservoir and ensure economic benefit.
Brief description of the drawings
Accompanying drawing 1 is the wastage using the rock core of the clastic rock low pressure Oil/gas Well reservoir protection liquid described in embodiment 7.
Embodiment
The present invention is not limited by following embodiments, can technique according to the invention scheme and actual conditions it is specific to determine
Embodiment.
With reference to embodiment, the invention will be further described：
Embodiment 1：The clastic rock low pressure Oil/gas Well reservoir protection liquid, raw materials by weight meter include acrylamide copolymer
1% to 4%, both mixture 0.04% to 0.08%, hexamethylenetetramine and hydroquinones of both chromic acetate and organic zirconium is mixed
Compound 0.4% to 0.7%, phenolic resin and resorcinol and the mixture 0.05% to 5% of polyethyleneimine three, thiocarbamide 0.01%
To 0.04%, surplus is water.
The clastic rock low pressure Oil/gas Well reservoir protection liquid for being made up of to obtain the raw material described in the present embodiment, is pumped into pit shaft
Form high viscogel filter cake temporarily blocking layer on eyelet or the borehole wall by physics dehydration afterwards, effectively block workover fluid low in
Ooze the leakage of reservoir.
Embodiment 2：The clastic rock low pressure Oil/gas Well reservoir protection liquid, raw materials by weight meter are total to including acrylamide
Both mixture 0.04% or 0.08%, hexamethylenetetramine and hydroquinones of both polymers 1% or 4%, chromic acetate and organic zirconium
Mixture 0.4% or 0.7%, phenolic resin and resorcinol and polyethyleneimine three mixture 0.05% or 5%, thiocarbamide
0.01% or 0.04%, surplus is water.
Embodiment 3：As the optimization of above-described embodiment, raw materials by weight meter include acrylamide copolymer 2%,
The mixture 0.5% of both mixture 0.05%, hexamethylenetetramine and the hydroquinones of both chromic acetate and organic zirconium, phenolic aldehyde tree
Fat and resorcinol and the mixture of polyethyleneimine three 0.1%, thiocarbamide 0.02%, surplus are water.
Embodiment 4：As the optimization of above-described embodiment, the mass ratio of chromic acetate and organic zirconium is 2 to 3:0.5 to 1, six times
The mass ratio of tetramine and hydroquinones is 4 to 6:1 to 2, phenolic resin and the matter of resorcinol and polyethyleneimine three
Amount is than being 1 to 4:2 to 5:1 to 2.
Embodiment 5：The clastic rock low pressure Oil/gas Well reservoir protection liquid, is obtained by following preparation methods：The first step, to required
The desired amount of thiocarbamide and the desired amount of acrylamide copolymer are added in the water of amount, is sufficiently stirred to obtain mixed once solution；The
Two steps, the mixture and aequum of both the desired amount of hexamethylenetetramine and hydroquinones are added into mixed once solution
Phenolic resin and resorcinol and the mixture of polyethyleneimine three, be sufficiently stirred to obtain secondary mixed solution；3rd step,
The mixture of the desired amount of chromic acetate and organic zirconium is added into secondary mixed solution, is sufficiently stirred to obtain mixed solution three times,
Clastic rock low pressure Oil/gas Well reservoir protection liquid is obtained after mixed solution gelling three times；Wherein, raw materials by weight meter bag
Include the mixture 0.04% to 0.08% of both acrylamide copolymer 1% to 4%, chromic acetate and organic zirconium, hexamethylenetetramine with
Mixture 0.4% to 0.7%, phenolic resin and the resorcinol of both hydroquinones and the mixture of polyethyleneimine three
0.05% to 5%, thiocarbamide 0.01% to 0.04%, surplus are water.
Embodiment 6：The clastic rock low pressure Oil/gas Well reservoir protection liquid, is obtained by following preparation methods：The first step, to required
The desired amount of thiocarbamide and the desired amount of acrylamide copolymer are added in the water of amount, is sufficiently stirred to obtain mixed once solution；The
Two steps, the mixture and aequum of both the desired amount of hexamethylenetetramine and hydroquinones are added into mixed once solution
Phenolic resin and resorcinol and the mixture of polyethyleneimine three, be sufficiently stirred to obtain secondary mixed solution；3rd step,
The mixture of the desired amount of chromic acetate and organic zirconium is added into secondary mixed solution, is sufficiently stirred to obtain mixed solution three times,
Clastic rock low pressure Oil/gas Well reservoir protection liquid is obtained after mixed solution gelling three times；Wherein, raw materials by weight meter bag
Include both mixture 0.04%, hexamethylenetetramine and hydroquinones of both acrylamide copolymer 1%, chromic acetate and organic zirconium
Mixture 0.7%, phenolic resin and resorcinol and polyethyleneimine three mixture 0.05%, thiocarbamide 0.01%, surplus is
The mass ratio of water, chromic acetate and organic zirconium is 2:1, the mass ratio of hexamethylenetetramine and hydroquinones is 4:1, phenolic resin and
Resorcinol and the mass ratio of polyethyleneimine three are 1:5:1.
Embodiment 7：The clastic rock low pressure Oil/gas Well reservoir protection liquid, is obtained by following preparation methods：The first step, to required
The desired amount of thiocarbamide and the desired amount of acrylamide copolymer are added in the water of amount, is sufficiently stirred to obtain mixed once solution；The
Two steps, the mixture and aequum of both the desired amount of hexamethylenetetramine and hydroquinones are added into mixed once solution
Phenolic resin and resorcinol and the mixture of polyethyleneimine three, be sufficiently stirred to obtain secondary mixed solution；3rd step,
The mixture of the desired amount of chromic acetate and organic zirconium is added into secondary mixed solution, is sufficiently stirred to obtain mixed solution three times,
Clastic rock low pressure Oil/gas Well reservoir protection liquid is obtained after mixed solution gelling three times；Wherein, raw materials by weight meter bag
Include both mixture 0.08%, hexamethylenetetramine and hydroquinones of both acrylamide copolymer 4%, chromic acetate and organic zirconium
Mixture 0.4%, phenolic resin and resorcinol and polyethyleneimine three mixture 5%, thiocarbamide 0.04%, surplus is water,
The mass ratio of chromic acetate and organic zirconium is 3:0.5, the mass ratio of hexamethylenetetramine and hydroquinones is 6:2, phenolic resin and
Resorcinol and the mass ratio of polyethyleneimine three are 4:2:2.
Embodiment 8：The clastic rock low pressure Oil/gas Well reservoir protection liquid, is obtained by following preparation methods：The first step, to required
The desired amount of thiocarbamide and the desired amount of acrylamide copolymer are added in the water of amount, is sufficiently stirred to obtain mixed once solution；The
Two steps, the mixture and aequum of both the desired amount of hexamethylenetetramine and hydroquinones are added into mixed once solution
Phenolic resin and resorcinol and the mixture of polyethyleneimine three, be sufficiently stirred to obtain secondary mixed solution；3rd step,
The mixture of the desired amount of chromic acetate and organic zirconium is added into secondary mixed solution, is sufficiently stirred to obtain mixed solution three times,
Clastic rock low pressure Oil/gas Well reservoir protection liquid is obtained after mixed solution gelling three times；Wherein, raw materials by weight meter bag
Include both mixture 0.05%, hexamethylenetetramine and hydroquinones of both acrylamide copolymer 2%, chromic acetate and organic zirconium
Mixture 0.5%, phenolic resin and resorcinol and polyethyleneimine three mixture 0.1%, thiocarbamide 0.02%, surplus is
The mass ratio of the water clastic rock low pressure Oil/gas Well reservoir protection liquid, chromic acetate and organic zirconium is 2.5:0.7, hexamethylenetetramine with
The mass ratio of hydroquinones is 5:1.7, phenolic resin and resorcinol and the mass ratio of polyethyleneimine three are 2:3:1.4.
Embodiment 9：Application of the clastic rock low pressure Oil/gas Well reservoir protection liquid in protection clastic rock low pressure Oil/gas Well reservoir.
First, henchnmrk test is carried out to the clastic rock low pressure Oil/gas Well reservoir protection liquid obtained according to above-described embodiment.
Heat-resistant stable is tested
The clastic rock low pressure Oil/gas Well reservoir protection liquid that above-described embodiment 5 to embodiment 8 obtains is put into 150 DEG C of high temperature ovens
In, observe its dynamic colloid formation property.
By observing result, the clastic rock low pressure Oil/gas Well reservoir protection liquid that above-described embodiment 5 to embodiment 8 obtains
Good gel-forming property can be kept under the conditions of 150 DEG C, final set strength is E at high temperature, and has good elastic characteristic,
Stability is kept under the conditions of 150 DEG C more than 40 days.
The clastic rock low pressure Oil/gas Well reservoir protection liquid for illustrating to be obtained according to embodiment 5 to embodiment 8 has well resistance to
High-temperature stability.
Pressure-bearing is tested
The bearing capacity for the clastic rock low pressure Oil/gas Well reservoir protection liquid that test above-described embodiment 5 to embodiment 8 obtains, with reference to work
Area（Refined carat gas condensate reservoir）Reservoir characteristic, selected area update strategy rate scope 12mD to 139mD natural cores carry out bearing capacity test,
Experiment condition initial pressure about 20MPa.
Tested by pressure-bearing, the clastic rock low pressure Oil/gas Well reservoir protection liquid obtained using above-described embodiment 5 to embodiment 8
The pressure in 120min of natural core afterwards reduces 1.34MPa to 2.24MPa or so, illustrates the clastic rock that above-described embodiment obtains
Low pressure Oil/gas Well reservoir protection liquid has good bearing capacity.
Lost circulation prevention is tested
（1）12mD is taken to the rock core of 139mD permeabilities, the clastic rock low pressure Oil/gas Well reservoir protection that above-described embodiment 7 is obtained
Liquid is used in progress lost circulation prevention experiment in rock core, starts to test after being warming up to 150 DEG C；
（2）Pressure is provided to this experiment by high-pressure nitrogen bottle, until reaching preset pressure 20MPa；
（3）It is after pressure stabilisation, record the wastage under stable state.Wastage（ml）As shown in Figure 1.
As seen in Figure 1, after establishing 20MPa positive differential pressures, total wastage of the rock core in 120min is in 8ml to 12ml
Between, embody the clastic rock low pressure Oil/gas Well reservoir protection liquid that above-described embodiment 7 obtains and shown preferably in the medium-low rock core that oozes
Leakage prevention.
Rock core the dynamic damage is tested
To investigate the obtained clastic rock low pressure Oil/gas Well reservoir protection liquid of above-described embodiment 5 to embodiment 8 under high temperature action
It is core permeability recovery value situation to protect reservoir effect, to the clastic rock low pressure Oil/gas Well reservoir obtained by above-described embodiment
The rock core after the experiment of liquid lost circulation prevention is protected, carries out reservoir protection effect assessment experiment, is recovered using the core permeability of embodiment 5
Value is as shown in table 1, and as shown in table 2 using the core permeability recovery value of embodiment 6, the core permeability using embodiment 7 is extensive
Complex value is as shown in table 3, as shown in table 4 using the core permeability recovery value of embodiment 8.
By table 1 to table 4 as can be seen that the clastic rock low pressure Oil/gas Well reservoir that above-described embodiment 5 to embodiment 8 obtains is protected
Shield liquid pressure-bearing is more than 20MPa, and reverse de-plugging pressure difference is less than 1MPa, and resume permeability rate is up to 100%.
By above-mentioned henchnmrk test, illustrate that the clastic rock low pressure Oil/gas Well reservoir protection liquid that above-described embodiment obtains exists
150 DEG C of temperature conditionss lower stabilization times were more than 20MPa more than 15 days, pressure-bearing, and reverse de-plugging pressure difference is less than 1MPa, resume permeability
Rate fully meets the use condition of the extra-high temperature clastic rock gas condensate reservoir such as refined carat up to 100%.
Practical applications of two, in refined carat gas condensate reservoir
By Low Damage reservoir protection liquid of the prior art in -2012 years 2010 refined carat gas condensate reservoir YK1, YK7CH,
In use, averagely missing 54 sides/well in tri- mouthfuls of deep layer condensate gas well workover treatments of YK21, average productivity recovery rate 81% is average
80,000 yuan/well of cost.
And by nothing of the prior art（It is low）Seepage reservoir protection liquid is in 2012 in the inspection pipe workover treatment of YK10 wells
In use, the leakage side of well killing fluid 3.5, yield recovery rate have reached 95%, effect is preferable.But its price is high, nothing（It is low）Seepage is stored up
Layer 250,000 yuan/well of protection liquid cost.
Year, the clastic rock low pressure Oil/gas Well reservoir protection liquid that the above embodiment of the present invention embodiment 1 to embodiment 8 obtains exists
Successful utilization in refined carat gas condensate reservoir YK15 wells inspection pipe operation, highest pressure-bearing 29MPa, well killing fluid during the well workover of 41 days
Do not miss, only 11 hours to 12 hours, final oil-production capacity recovery rates 100% successful with regard to induced flow of gaslift after operation（Resume permeability
Rate 100%）.
By above-mentioned practical application, clastic rock low pressure Oil/gas Well that the above embodiment of the present invention 1 to embodiment 8 obtains
Reservoir protection liquid phase is for Low Damage reservoir protection liquid of the prior art and nothing（It is low）For seepage reservoir protection liquid, Neng Gouzeng
450 tons to 460 tons of oil, increase the side of gas 3,000,000 to 3,200,000 sides, 4,000,000 yuan to 4,120,000 yuan of extra earning, save 170,000 yuan of gaslift expense extremely
180000 yuan, the clastic rock low pressure Oil/gas Well reservoir protection liquid cost that the above embodiment of the present invention 1 to embodiment 8 obtains reduces by 30,000
Member/well time more than 450 ten thousand yuan of synergy altogether, has reached the purpose of effective protection reservoir and cost efficiency to 200,000 yuan/well.
In summary, clastic rock low pressure Oil/gas Well reservoir protection liquid energy of the present invention enough effectively protects clastic rock low pressure
Oil/gas Well reservoir, use the leakage of the clastic rock low pressure Oil/gas Well of clastic rock low pressure Oil/gas Well reservoir protection liquid of the present invention
To measure minimum or do not miss, bearing capacity significantly improves, and can save gaslift expense, and oil-production capacity recovery rate reaches 100%, and
The cost of clastic rock low pressure Oil/gas Well reservoir protection liquid of the present invention is relatively low, has more preferable application prospect, makes the present invention
Described clastic rock low pressure Oil/gas Well reservoir protection liquid energy is enough in domestic and international deep layer high temperature clastic rock gas condensate reservoir, particularly with
The low-pressure gas well advantage of mid-later development phase becomes apparent, and can effectively protect reservoir and ensure economic benefit.
Above technical characteristic constitutes embodiments of the invention, and it has stronger adaptability and implementation result, can basis
The non-essential technical characteristic of increase and decrease is actually needed, to meet the needs of different situations.
Claims (7)
1. a kind of clastic rock low pressure Oil/gas Well reservoir protection liquid, it is characterised in that raw materials by weight meter includes acrylamide
Mixture 0.04% to 0.08%, hexamethylenetetramine and the hydroquinones two of both copolymer 1 % to 4%, chromic acetate and organic zirconium
Mixture 0.4% to 0.7%, phenolic resin and the resorcinol of person and mixture 0.05% to 5%, the thiocarbamide of polyethyleneimine three
0.01% to 0.04%, surplus is water.
2. clastic rock low pressure Oil/gas Well reservoir protection liquid according to claim 1, it is characterised in that raw material percentage by weight
Than counting the mixture 0.05% for including both acrylamide copolymer 2%, chromic acetate and organic zirconium, hexamethylenetetramine and to benzene two
Mixture 0.5%, phenolic resin and the resorcinol of both phenol and the mixture 0.1% of polyethyleneimine three, thiocarbamide 0.02%,
Surplus is water.
3. clastic rock low pressure Oil/gas Well reservoir protection liquid according to claim 1 or 2, it is characterised in that chromic acetate with it is organic
The mass ratio of zirconium is 2 to 3:0.5 to 1, the mass ratio of hexamethylenetetramine and hydroquinones is 4 to 6:1 to 2, phenolic resin and
Resorcinol and the mass ratio of polyethyleneimine three are 1 to 4:2 to 5:1 to 2.
4. clastic rock low pressure Oil/gas Well reservoir protection liquid according to claim 1 or 2, it is characterised in that in the steps below
Arrive：The first step, the desired amount of thiocarbamide and the desired amount of acrylamide copolymer are added into the desired amount of water, be sufficiently stirred to obtain
Mixed once solution；Second step, both the desired amount of hexamethylenetetramine and hydroquinones are added into mixed once solution
Mixture and the desired amount of phenolic resin and resorcinol and the mixture of polyethyleneimine three, it is sufficiently stirred to obtain secondary
Mixed solution；3rd step, the mixture of the desired amount of chromic acetate and organic zirconium is added into secondary mixed solution, is sufficiently stirred
To mixed solution three times, clastic rock low pressure Oil/gas Well reservoir protection liquid is obtained after mixed solution gelling three times.
5. clastic rock low pressure Oil/gas Well reservoir protection liquid according to claim 3, it is characterised in that obtain in the steps below：
The first step, the desired amount of thiocarbamide and the desired amount of acrylamide copolymer are added into the desired amount of water, be sufficiently stirred to obtain one
Secondary mixed solution；Second step, the mixed of both the desired amount of hexamethylenetetramine and hydroquinones is added into mixed once solution
Compound and the desired amount of phenolic resin and resorcinol and the mixture of polyethyleneimine three, it is sufficiently stirred to obtain secondary mix
Close solution；3rd step, the mixture of the desired amount of chromic acetate and organic zirconium is added into secondary mixed solution, is sufficiently stirred to obtain
Mixed solution three times, clastic rock low pressure Oil/gas Well reservoir protection liquid is obtained after mixed solution gelling three times.
6. a kind of preparation method of clastic rock low pressure Oil/gas Well reservoir protection liquid according to claim 1 or 2 or 3, it is special
Sign is to carry out in the steps below：The first step, the desired amount of thiocarbamide and the desired amount of acrylamide are added into the desired amount of water
Copolymer, it is sufficiently stirred to obtain mixed once solution；Second step, the desired amount of six methine four is added into mixed once solution
The mixture of both amine and hydroquinones and the mixing of the desired amount of phenolic resin and resorcinol and polyethyleneimine three
Thing, it is sufficiently stirred to obtain secondary mixed solution；3rd step, the desired amount of chromic acetate and organic zirconium are added into secondary mixed solution
Mixture, be sufficiently stirred to obtain mixed solution three times, the storage of clastic rock low pressure Oil/gas Well obtained after the gelling of mixed solution three times
Layer protection liquid.
7. a kind of clastic rock low pressure Oil/gas Well reservoir protection liquid according to claim 1 or 2 or 3 or 4 or 5 is in protection chip
The application of rock low pressure Oil/gas Well reservoir.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109652031A (en) * | 2018-12-25 | 2019-04-19 | 中石化石油工程技术服务有限公司 | A kind of strong wall drilling fluid system and preparation method thereof |
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