CN108690586A - The capsule matter agent of natural gas well suede bag pressure well liquid - Google Patents
The capsule matter agent of natural gas well suede bag pressure well liquid Download PDFInfo
- Publication number
- CN108690586A CN108690586A CN201810489692.9A CN201810489692A CN108690586A CN 108690586 A CN108690586 A CN 108690586A CN 201810489692 A CN201810489692 A CN 201810489692A CN 108690586 A CN108690586 A CN 108690586A
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- capsule
- suede
- weight
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- starch
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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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/516—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls characterised by their form or by the form of their components, e.g. encapsulated material
-
- 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
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
Abstract
The present invention relates to a kind of capsule matter agent of natural gas well suede bag pressure well liquid, the natural gas well suede bag pressure well liquid capsule matter agent is made of the mixing of carboxymethyl starch, hydroxyethyl starch and hydroxypropul starch, the parts by weight of the carboxymethyl starch are 4-6, the parts by weight of hydroxyethyl starch are 1-2, and the parts by weight of hydroxypropul starch are 1-2.Its purpose is to provide the film layers that one kind can form package gas courage outside in suede capsule capsule courage (gas courage), preliminarily form suede capsule structure, prevent gas in gas courage from escaping, it keeps gas courage to stablize, improves suede capsule intensity, be formed by that the film of suede capsule is big with layer thickness, intensity is high, gas in gas courage can be effectively prevented to escape, the suede capsule structure in suede capsule structural life-time, stabilising system can effectively be extended, and nontoxic, the natural gas well suede bag pressure well liquid capsule matter agent of safety and environmental protection.
Description
Technical field
The present invention relates to a kind of inorganic agents suitable for natural gas well workover treatment well killing fluid, relate in particular to one kind
The capsule matter agent of natural gas well suede bag pressure well liquid.
Background technology
Natural gas well suede bag pressure well liquid uses working fluid during referring to a kind of natural gas well workover treatment.
Currently, being faced during most natural gas well workover treatments, formation leakage amount is big, can not provide safe pit shaft completes
It plays lower tubular column, salvage the problems such as junk.
The natural gas well does not have leakage control ability with traditional well killing fluid based on clear water, tight in face of the leakage of low pressure gas-bearing formation
Weight, can not be successfully kill-job, part low pressure natural gas well clear water well killing fluid wastage reaches 1000m3.A large amount of clear water leakages enter ground
Layer easily causes the reservoir damages such as water lock, Water trapping, and gas-bearing formation production capacity recovery effects are bad after leading to workover treatment, while increasing work
Industry difficulty and operating cost.For solve natural gas well workover treatment during miss control problem, some investigators from other
Leak-proof leak-stopping link introduces the blocking agents such as closure means, including gel, resin in operation process.This kind of blocking agent enters natural gas storage
Solid-state or the temporary bridging structure of nearly solid-state are formed after layer, are effectively temporarily blocked up formation gas channel, are realized safe kill-job.But solid-state in stratum
Or nearly solid-state temporarily blocks up structural degradation difficulty, formation gas flow channel is difficult to restore after the completion of workover treatment, leads to gas well yield
Restore difficult.
In existing closure means, it is capable of providing using foam, recyclable microvesicle as the Solid Free of representative closure means certain
Temporarily stifled stratum effect.But either foam is still recycled microvesicle, and self structure stability is poor, especially in high temperature, high pressure, height
In salinity environment, temporarily stifled effect is difficult to meet entire workover treatment process stability requirement.Meanwhile part foam system scene
Preparing process is complicated, and operating cost is high.
Suede capsule fluid is that a kind of new nothing different from microvesicle microstructure found during studying microvesicle system is consolidated
Phase plugging material.The plugging material of this structure of capsule containing suede can be deformed by oil gas reservoir osmotic space or be changed performance, maximum limit
Degree ground occupy reservoir preserve with osmotic space or formation mucous layer, block leakage channel of different sizes.The pressure of the structure of capsule containing suede
Well liquid is referred to as suede bag pressure well liquid.Suede bag pressure well liquid not only have be not necessary to optional equipment can realize Solid Free density it is low, control
The advantages that leakage, stratum medium staple bag pressure well liquid form temporary bridging structure and can degrade automatically, realize formation gas stream after workover treatment
Dynamic channel is quickly opened, the fast quick-recovery of gas well yield.
The ingredient of the film layer for forming package gas courage outside the gas courage of suede capsule structure is known as capsule matter agent in the present invention.It is existing
It is gelatinized starch to have its preferable main component of the capsule matter agent effect in technology for working solution.However this kind of capsule matter dosage form at
The film of suede capsule with layer thickness still than relatively thin, intensity is relatively low, for effectively preventing in gas courage gas effusion effect less desirable.Cause
This, researches and develops new suede bag pressure well liquid capsule matter agent, for enhancing suede capsule structural strength, extends in suede capsule structural life-time, stabilising system
Suede capsule structure be of great significance.
Invention content
The purpose of the present invention is to provide the film layer that one kind can form package gas courage outside in suede capsule capsule courage (gas courage), preliminary shapes
At suede capsule structure, gas is prevented in gas courage to escape, gas courage is kept to stablize, improve suede capsule intensity, be formed by the film of suede capsule with
Layer thickness is big, intensity is high, can effectively prevent gas in gas courage from escaping, can effectively extend in suede capsule structural life-time, stabilising system
Suede capsule structure, and nontoxic, the natural gas well suede bag pressure well liquid capsule matter agent of safety and environmental protection.
The natural gas well suede bag pressure well liquid capsule matter agent of the present invention, the natural gas well suede bag pressure well liquid is with capsule matter agent by carboxylic
Methyl starch, hydroxyethyl starch and hydroxypropul starch mixing are constituted, and the parts by weight of the carboxymethyl starch are 4-6, and ethoxy forms sediment
The parts by weight of powder are 1-2, and the parts by weight of hydroxypropul starch are 1-2.
Preferably, the parts by weight of the carboxymethyl starch are 4.2-5.8, and the parts by weight of hydroxyethyl starch are 1.1-1.9,
The parts by weight of hydroxypropul starch are 1.1-1.9.
Preferably, the parts by weight of the carboxymethyl starch are 4.4-5.6, and the parts by weight of hydroxyethyl starch are 1.2-1.8,
The parts by weight of hydroxypropul starch are 1.2-1.8.
Preferably, the parts by weight of the carboxymethyl starch are 4.6-5.4, and the parts by weight of hydroxyethyl starch are 1.3-1.7,
The parts by weight of hydroxypropul starch are 1.3-1.7.
Preferably, the parts by weight of the carboxymethyl starch are 4.8-5.2, and the parts by weight of hydroxyethyl starch are 1.4-1.6,
The parts by weight of hydroxypropul starch are 1.4-1.6.
Preferably, the parts by weight of the carboxymethyl starch are 5, and the parts by weight of hydroxyethyl starch are 1.5, hydroxypropul starch
Parts by weight are 1.5.
The natural gas well suede bag pressure well liquid capsule matter agent of the present invention, using the present invention exclusive technique and component, by carboxylic
Methyl starch, hydroxyethyl starch and hydroxypropul starch mixing are constituted, and the parts by weight of the carboxymethyl starch are 4-6, and ethoxy forms sediment
The parts by weight of powder are 1-2, and the parts by weight of hydroxypropul starch are 1-2.Experiment shows the natural gas well suede bag pressure using the present invention
The coal bed gas suede capsule drilling fluid that well liquid is obtained with capsule matter agent can form the film layer of package gas courage outside, just in suede capsule capsule courage (gas courage)
Step forms suede capsule structure, prevents gas in gas courage from escaping, gas courage is kept to stablize, improve suede capsule intensity, be formed by suede capsule
Film and layer thickness are big, intensity is high, can effectively prevent gas in gas courage from escaping, can effectively extend suede capsule structural life-time, stabilising system
In suede capsule structure, and nontoxic, safety and environmental protection, formation gas flow channel is difficult after solving workover treatment in the prior art
To restore, cause gas well yield to restore difficult problem.Therefore, natural gas well suede bag pressure well liquid capsule matter agent of the invention has
Substantive distinguishing features outstanding and significant progress.
The natural gas well suede bag pressure well liquid capsule matter agent of the present invention, is specially set for suede capsule Killing Fluid System feature
Meter is mainly used for forming the film layer of package gas courage outside suede capsule gas courage, preliminarily forms suede capsule structure.The present invention the capsule matter agent with
Capsule matter agent in the prior art or other inorganic agents with similar effect are compared, and suede capsule matter thickness can not only be effectively increased,
Gas courage and surface tension continuously can also be effectively reduced, while forming the glutinous layer of height of package gas courage outside gas courage, it can
It effectively prevent gas in gas courage to escape, gas courage is kept to stablize, improve suede capsule intensity.Also, the capsule matter agent of the present invention is suitable for
Natural gas well workover treatment, and the capsule matter agent is nontoxic, harmless, it is safe to use, it is subjected to type inorganic agent for environment.
Specific implementation mode
Not therefore below by the specific embodiment specific operation process that present invention be described in more detail, but the present invention
And it is any way limited.
Embodiment 1
The natural gas well suede bag pressure well liquid capsule matter agent of the present invention is formed sediment by carboxymethyl starch, hydroxyethyl starch and hydroxypropyl
Powder mixing is constituted, and the parts by weight of the carboxymethyl starch are 4-6, and the parts by weight of hydroxyethyl starch are 1-2, hydroxypropul starch
Parts by weight are 1-2.
Embodiment 2
The natural gas well suede bag pressure well liquid capsule matter agent of the present invention is formed sediment by carboxymethyl starch, hydroxyethyl starch and hydroxypropyl
Powder mixing is constituted, and the parts by weight of the carboxymethyl starch are 4.2-5.8, and the parts by weight of hydroxyethyl starch are 1.1-1.9, hydroxypropyl
The parts by weight of base starch are 1.1-1.9.
Embodiment 3
The natural gas well suede bag pressure well liquid capsule matter agent of the present invention is formed sediment by carboxymethyl starch, hydroxyethyl starch and hydroxypropyl
Powder mixing is constituted, and the parts by weight of the carboxymethyl starch are 4.4-5.6, and the parts by weight of hydroxyethyl starch are 1.2-1.8, hydroxypropyl
The parts by weight of base starch are 1.2-1.8.
Embodiment 4
The natural gas well suede bag pressure well liquid capsule matter agent of the present invention is formed sediment by carboxymethyl starch, hydroxyethyl starch and hydroxypropyl
Powder mixing is constituted, and the parts by weight of the carboxymethyl starch are 4.6-5.4, and the parts by weight of hydroxyethyl starch are 1.3-1.7, hydroxypropyl
The parts by weight of base starch are 1.3-1.7.
Embodiment 5
The natural gas well suede bag pressure well liquid capsule matter agent of the present invention is formed sediment by carboxymethyl starch, hydroxyethyl starch and hydroxypropyl
Powder mixing is constituted, and the parts by weight of the carboxymethyl starch are 4.8-5.2, and the parts by weight of hydroxyethyl starch are 1.4-1.6, hydroxypropyl
The parts by weight of base starch are 1.4-1.6.
Embodiment 6
The natural gas well suede bag pressure well liquid capsule matter agent of the present invention is formed sediment by carboxymethyl starch, hydroxyethyl starch and hydroxypropyl
Powder mixing is constituted, and the parts by weight of the carboxymethyl starch are 5, and the parts by weight of hydroxyethyl starch are 1.5, the weight of hydroxypropul starch
Part is 1.5.
Above-mentioned carboxymethyl starch, hydroxyethyl starch, hydroxypropul starch are commercially available, and general industrial products can be selected.
The present invention natural gas well suede bag pressure well liquid with the agent of capsule matter in preparing natural gas well suede bag pressure well liquid, with every hectogram
Water meter, the dosage of the suede capsule working solution capsule courage agent is 1.8~3.0 grams, i.e., 1.8~3.0g is added in the water of every hectogram
Capsule courage agent, obtained solution ph be 8~10,25~45mPas of apparent viscosity, base fluid (in suede bag pressure well liquid remove capsule
The solution that other components outside matter agent are formed) in capsule matter agent is added after, half-life period increase >=130min.
Construction embodiment 1
Test base fluid formula:The natural gas well suede bag pressure well liquid capsule matter agent of fresh water 400g, sodium carbonate 0.40g, the present invention
10.00g, capsule suede agent 4.00g are (by oil level sodium carboxymethylcellulose, polyacrylamide (molecular weight 10,000,000), crosslinked polyethylene
Pyrrolidones, industrial potassium chloride are with quality parts ratio 5:3:2:2 composition), capsule courage agent 2.00g (by neopelex,
Three kinds of lauroyl isopropanolamine, polyethylene glycol 200 substances are with quality parts ratio 2:6:2 are simply mixed composition).The quality of each component
Proportioning is water:Sodium carbonate:Capsule matter agent:Capsule suede agent:Capsule courage agent is 100:0.1:2.5:1.0:0.5.
According to above-mentioned formula, under agitation, sodium carbonate, the agent of capsule suede, capsule courage agent are sequentially added into fresh water, is configured to
Base fluid, then capsule matter agent is added in base fluid, test base fluid labeled as 1#.Wherein, the speed of stirring can control on the left sides 5000rpm
It is right.
Construction embodiment 2
Test base fluid formula:The natural gas well suede bag pressure well liquid capsule matter agent of fresh water 400g, sodium carbonate 0.40g, the present invention
10.00g, capsule suede agent 4.00g are (poly- by oil level sodium carboxymethylcellulose, polyacrylamide (relative molecular weight 10,000,000), crosslinking
Vinylpyrrolidone, industrial potassium chloride are with quality parts ratio 5:3:2:2 compositions, wherein sodium carboxymethylcellulose molecular weight exists
Meet between grade oil standard 200,000~500,000), capsule courage agent 2.00g (by neopelex, lauroyl isopropanolamine,
Three kinds of substances of polyethylene glycol 200 are with quality parts ratio 2:6:2 are simply mixed composition).The quality proportioning of each component is water:Carbonic acid
Sodium:Capsule matter agent:Capsule suede agent:Capsule courage agent is 100:0.1:2.5:1.0:0.5.
According to above-mentioned formula, under agitation, sodium carbonate, the agent of capsule suede, capsule courage agent are sequentially added into fresh water, is configured to
Base fluid, then capsule matter agent is added in base fluid, test base fluid labeled as 2#.Wherein, the speed of stirring can control on the left sides 5000rpm
It is right.
Construction embodiment 3
Test base fluid formula:The natural gas well suede bag pressure well liquid capsule matter agent of fresh water 400g, sodium carbonate 0.40g, the present invention
10.00g, capsule suede agent 4.00g are (poly- by oil level sodium carboxymethylcellulose, polyacrylamide (relative molecular weight 10,000,000), crosslinking
Vinylpyrrolidone, industrial potassium chloride are with quality parts ratio 5:3:2:2 compositions, wherein sodium carboxymethylcellulose molecular weight exists
Meet between grade oil standard 200,000~500,000), capsule courage agent 2.00g (by neopelex, lauroyl isopropanolamine,
Three kinds of substances of polyethylene glycol 200 are with quality parts ratio 2:6:2 are simply mixed composition).The quality proportioning of each component is water:Carbonic acid
Sodium:Capsule matter agent:Capsule suede agent:Capsule courage agent is 100:0.1:2.5:1.0:0.5.
According to above-mentioned formula, under agitation, sodium carbonate, the agent of capsule suede, capsule courage agent are sequentially added into fresh water, is configured to
Base fluid, then capsule matter agent is added in base fluid, test base fluid labeled as 3#.Wherein, the speed of stirring can control on the left sides 5000rpm
It is right.
1#, 2# and 3# natural gas well for embodiment 1,2 and 3 of constructing are surveyed with the performance of suede bag pressure well liquid capsule matter agent
Examination:
PH value
6.0g capsule matter agent samples are weighed, 3wt% distilled water solutions is configured to, is put into volume 300mL beakers, adds distilled water
200mL, stirring 30min are to abundant dissolving, and with cleaned glass stick drop solution on pH test paper, reference standard color range is read.
Determination of moisture
2.1 weigh (20 ± 0.2) g capsule matter agent samples, are put into clean cucurbit, and 50mL toluene, carefulness stirring is added.
Receiver and condenser pipe are connected, nozzle is clogged with a little absorbent cotton, is heated to boiling, and control back-flow velocity, make cooling tube angle
Lower drop speed is 2 drops/s~4 drops/s.
2.2 when liquid measure is not further added by receiver, then improves temperature, stops distillation after heating several minutes.
2.3 after fluid temperature is down to room temperature and oil-water interfaces are clear, reads the ml of water phase volume and is converted into water
Quality.
2.4 calculate moisture by formula (I):
In formula:S is moisture, %;m1For the quality of water in receiver, g;m2For sample mass, g.
2.5 allow Parallel errors to be less than 0.2%.
Apparent viscosity measures
3.1 instrument
Using Qingdao with spring oil Instrument Ltd. ZNN-D6 type rotational viscometer, which be with motor
The rotary-type instrument of power.Working solution is in the annular space between two concentric drums.Outer barrel (or rotating cylinder) is with constant speed (rpm)
Rotation.Rotation of the rotating cylinder in working solution to inner cylinder (or suspending hammer) generate torque, torque spring prevent inner cylinder rotation, and with
The displacement of the connected dial plate instruction suspending hammer of suspending hammer.
3.2 mensuration program
Pay attention to:Instrument maximum operating temperature is 93 DEG C.It such as wants measuring temperature to be higher than 93 DEG C of working solution, should use solid
Metal inner cylinder or the internal hollow metal inner cylinder being completely dried.Because when being immersed in hot operation liquid, inside hollow inner cylinder
Liquid may evaporate and cause the rupture of inner cylinder.
3.2.1 the temperature for measuring and recording working solution, by DEG C as unit of indicate.
3.2.2 it measures 400mL distilled water using clean graduated cylinder to be transferred in clean stirring cup, 12g is added in distilled water
Capsule matter agent, homogenizer 5000rpm stir 20min.
3.2.3 the sample stirred evenly is injected into container, and rotating cylinder is made just to immerse to graduation mark.
3.2.4 instrument is opened, rotating speed is adjusted at 600rpm grades, after dial plate readings is constant, reads simultaneously recording meter panel readings.
3.3 calculating
Apparent viscosity is calculated by formula (I):
In formula:AV is plastic viscosity, mPas;θ600For 600rpm when constant readings, dimensionless.
4 half-life period
4.1 instrument
U.S.'s WARING companies 8010EG type bruishers are the rotary-type instruments using motor as power, and double speed is mechanical fixed
When, pedestal is epoxy coating, and container is that heat resistant glass with handles and two layers of ethylene and styrene lid, special measuring cup are molten
Agent is 1L.
4.2 mensuration program
4.2.1 20mL distilled water is added in 8010EG type bruishers, then adds the capsule matter agent of 3% distilled water, is stirred
There is foam in 60s, solution.
4.2.2 test fluid (is transferred in 1000mL measuring graduates, records foam total volume V1(mL), start timing,
It measures foam volume and is down to 1/2V1The time required to mL, i.e. half-life period t1/2(min)。
4.2.3 prepared 1#, 2#, 3# suede bag pressure well liquid base fluid is measured according to step 4.2.2 before capsule matter agent is added
Half-life period t1/2(min)。
4.2.4 corresponding capsule matter agent is sequentially added in 1#, 2#, 3# suede bag pressure well liquid base fluid, is measured according to step 4.2.2
The half-life period t after capsule matter agent is added1'/2(min)。
4.3 calculating
Half-life period incrementss are calculated by formula (П):
Δ t=t1'/2-t1/2(П)
In formula:For half-life period incrementss.
It is tested by the performance of the suede bag pressure well liquid capsule matter agent of 1~4 pair of Examples 1 to 3 of the above testing procedure, gained knot
Fruit is referring to table 1:
A kind of table 1 natural gas well suede bag pressure well liquid capsule matter agent performance indicator
It can be seen that each of the natural gas well suede bag pressure well liquid capsule matter agent of the embodiment of the present invention 1~3 from the above experimental result
Item performance indicator reaches design requirement.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (6)
1. the capsule matter agent of natural gas well suede bag pressure well liquid, it is characterized in that:The natural gas well suede bag pressure well liquid is with capsule matter agent by carboxylic
Methyl starch, hydroxyethyl starch and hydroxypropul starch mixing are constituted, and the parts by weight of the carboxymethyl starch are 4-6, and ethoxy forms sediment
The parts by weight of powder are 1-2, and the parts by weight of hydroxypropul starch are 1-2.
2. natural gas well suede bag pressure well liquid according to claim 1 capsule matter agent, it is characterized in that:The carboxymethyl starch
Parts by weight are 4.2-5.8, and the parts by weight of hydroxyethyl starch are 1.1-1.9, and the parts by weight of hydroxypropul starch are 1.1-1.9.
3. natural gas well suede bag pressure well liquid according to claim 2 capsule matter agent, it is characterized in that:The carboxymethyl starch
Parts by weight are 4.4-5.6, and the parts by weight of hydroxyethyl starch are 1.2-1.8, and the parts by weight of hydroxypropul starch are 1.2-1.8.
4. natural gas well suede bag pressure well liquid according to claim 3 capsule matter agent, it is characterized in that:The carboxymethyl starch
Parts by weight are 4.6-5.4, and the parts by weight of hydroxyethyl starch are 1.3-1.7, and the parts by weight of hydroxypropul starch are 1.3-1.7.
5. natural gas well suede bag pressure well liquid according to claim 4 capsule matter agent, it is characterized in that:The carboxymethyl starch
Parts by weight are 4.8-5.2, and the parts by weight of hydroxyethyl starch are 1.4-1.6, and the parts by weight of hydroxypropul starch are 1.4-1.6.
6. natural gas well suede bag pressure well liquid according to claim 5 capsule matter agent, it is characterized in that:The carboxymethyl starch
Parts by weight are 5, and the parts by weight of hydroxyethyl starch are 1.5, and the parts by weight of hydroxypropul starch are 1.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810489692.9A CN108690586A (en) | 2018-05-21 | 2018-05-21 | The capsule matter agent of natural gas well suede bag pressure well liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810489692.9A CN108690586A (en) | 2018-05-21 | 2018-05-21 | The capsule matter agent of natural gas well suede bag pressure well liquid |
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| CN108690586A true CN108690586A (en) | 2018-10-23 |
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ID=63846688
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2018
- 2018-05-21 CN CN201810489692.9A patent/CN108690586A/en active Pending
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| CN104109515A (en) * | 2013-04-16 | 2014-10-22 | 北京力会澜博能源技术有限公司 | Low temperature freshwater fuzzy-ball working fluid ball layer agent |
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Application publication date: 20181023 |