CN105482795B - A kind of temporary stifled type workover fluid and its preparation method suitable for fissurity reservoir - Google Patents
A kind of temporary stifled type workover fluid and its preparation method suitable for fissurity reservoir Download PDFInfo
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- CN105482795B CN105482795B CN201510882620.7A CN201510882620A CN105482795B CN 105482795 B CN105482795 B CN 105482795B CN 201510882620 A CN201510882620 A CN 201510882620A CN 105482795 B CN105482795 B CN 105482795B
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- 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
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
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Abstract
The invention discloses a kind of temporary stifled type workover fluids and its preparation method suitable for fissurity reservoir, and the temporarily stifled type workover fluid includes the following component by quality proportioning：95~97 parts of pure water, 0.2~0.6 part of thickener, 0.2~0.4 part of oil-soluble temporary plugging agent, 0.4~0.8 part of corn flour, rice meal 0.4~0.6,1~2 part of potassium chloride, 0.1~0.2 part of degradation agent, 0.1~0.2 part of cleanup additive, 0.2~0.3 part of wetting agent.Temporarily stifled type workover fluid provided in an embodiment of the present invention improves the suspending power to temporarily blocking up material, while reducing the filter loss of workover fluid, and wherein thickening material belongs to biogum, it is easier to degrade, and environmentally safe.
Description
Technical field
The present invention relates to petroleum collection technical field more particularly to a kind of temporary stifled type workover fluids suitable for fissurity reservoir
And its preparation method.
Background technology
Fissurity reservoir pore space crack is relatively developed, and for crude oil major storage in the sillar cut by fracture network, crack is oil
The channel of stream is easy to cause intrusion, the leakage of working fluid in workover treatment, cause water-sensitive, water lock, emulsion plugging, salt it is quick and
A variety of damages such as alkali is quick.
The lost circulation prevention well workover liquid system of the formation such as some polymer, diverting agent is often added at present, and this kind of system cannot be effective
It is big to the intrusion or wastage on stratum for the feature of fissurity reservoir situation complexity, easily cause hydration and expansion of clay, fortune
It moves, is incompatible to form secondary precipitation with stratum, stratum is caused seriously to damage, while is difficult plus the row of returning, pollute, effect is not
It is ideal.
For example, one is oil-soluble material is added in workover fluid, main component has oil-soluble resin, polymer etc..This
Method needs to dissolve oil-soluble resin by in-place oil after workover treatment, to renwing stratum permeability.Obvious this method
It is only used for aqueous lower oil well, for aqueous high oil well, yield recovery effects are undesirable.
One is acid-soluble materials are added in workover fluid, main component has calcium carbonate, polymer etc..The method has two sides
Face is insufficient：First, particle diameter and formation fracture hole matching problem, complicated, the unbalanced situation of fracture development to geological condition
It effectively cannot temporarily block up, temporarily stifled specific aim is not strong, and temporarily stifled rate is low, temporarily blocks up narrow range.Second is that needing to carry out acidification solution after workover treatment
Stifled, operating cost is high.
Also one is water-soluble material is added in workover fluid, main component has water soluble salt, polymer etc..Its principle
It is using the inorganic salt grain in supersaturated salt solution as plugging material, after workover treatment, saturated brine is constantly diluted, inorganic
Salt particle constantly dissolves, to de-plugging.The main deficiency of the method, which is dissolved in the salt in water, does not have leak stopping function, causes to waste,
Inorganic salt solution density is larger simultaneously, it is easier to cause to miss.And want to improve the viscous stifled also difficult of brine.
Therefore, workover fluid in the prior art, which exists, is easy that severe leakage occurs and leads to reservoir pollution during well workover
The technical issues of.
Invention content
The embodiment of the present invention is used by providing a kind of temporary stifled type workover fluid and its preparation method suitable for fissurity reservoir
Lead to the skill of reservoir pollution to solve to be easy generation severe leakage during well workover existing for workover fluid in the prior art
Art problem.
First aspect of the embodiment of the present invention provides a kind of temporary stifled type workover fluid suitable for fissurity reservoir, including following
By the component of quality proportioning：
95~97 parts of pure water, 0.2~0.6 part of thickener, 0.2~0.4 part of oil-soluble temporary plugging agent, corn flour 0.4~0.8
Part, rice meal 0.4~0.6,1~2 part of potassium chloride, 0.1~0.2 part of degradation agent, 0.1~0.2 part of cleanup additive, wetting agent 0.2~
0.3 part.
Optionally, the thickener is the mixture of hydroxypropyl guar, hydroxypropyl TQ gums and xanthans.
Optionally, the particle size range of the oil-soluble temporary plugging agent is between the mesh of 200 mesh~400.
Optionally, the particle size range of the corn flour is between the mesh of 20 mesh~60.
Optionally, the particle size range of the rice meal is between the mesh of 100 mesh~200.
Optionally, the purity of the potassium chloride is 90% or more.
Optionally, the degradation agent includes biological enzyme and oxidant.
Optionally, the cleanup additive includes polymeric alcohol.
Optionally, the wetting agent includes lauryl sodium sulfate, empgen BB.
The present embodiment second aspect also provides a kind of preparation method of temporarily stifled type workover fluid as described in relation to the first aspect, packet
It includes：
Pure water is put into agitator tank for 95~97 parts, blender is started；
1~2 part of potassium chloride is added to stir evenly；
Liquid in circulation stirring tank, and 0.2~0.6 part of thickener is added by agitator tank by charging hopper, it is sufficiently stirred 1
Hour；
After measuring viscosity with drilling fluid Marsh funnel and being more than 40s, 0.2~0.4 part of oil-soluble temporary plugging agent, 0.4 is added
~0.8 portion of corn flour, 0.4~0.6 rice meal stir 20-30 minutes；
0.1~0.2 part of degradation agent, 0.2~0.3 part of wetting agent, 0.1~0.2 portion of cleanup additive is added, and stirs evenly.
One or more technical solution in the embodiment of the present invention, at least has the following advantages that or advantageous effect：
1, the present invention uses the mixed type thickener of hydroxypropyl guar, hydroxypropyl TQ gums and xanthans, improves to temporary
The suspending power of stifled material, while the filter loss of workover fluid is reduced, wherein thickening material belongs to biogum, it is easier to drop
Solution, and it is environmentally safe；
2, the present invention is using oil-soluble temporary plugging agent, the compound temporarily stifled material of corn flour, rice meal, and particle diameter distribution is in 20 mesh
Between~400 mesh, the wherein grain size of oil-soluble temporary plugging agent is in 200~400 mesh, and the grain size of corn flour is in the mesh of 20 mesh~60, rice
Powder is particle size range in the mesh of 100 mesh~200, and fracture porosity reservoir can play the role of effective temporarily stifled；
3, the present invention use cleanup additive and wetting agent, ensure it is hydrophilic surface tension is reduced to 25mN/m simultaneously,
High temperature rear surface tension is less than 23mN/m, effectively improves the row of returning of stratum liquid after workover treatment.
Specific implementation mode
The embodiment of the present invention is used by providing a kind of temporary stifled type workover fluid and its preparation method suitable for fissurity reservoir
Lead to the skill of reservoir pollution to solve to be easy generation severe leakage during well workover existing for workover fluid in the prior art
Art problem.
First aspect of the embodiment of the present invention provides a kind of temporary stifled type workover fluid suitable for fissurity reservoir, including following
By the component of quality proportioning：
95~97 parts of pure water, 0.2~0.6 part of thickener, 0.2~0.4 part of oil-soluble temporary plugging agent, corn flour 0.4~0.8
Part, rice meal 0.4~0.6,1~2 part of potassium chloride, 0.1~0.2 part of degradation agent, 0.1~0.2 part of cleanup additive, wetting agent 0.2~
0.3 part.
In specific implementation process, the thickener is the mixture of hydroxypropyl guar, hydroxypropyl TQ gums and xanthans.
In specific implementation process, the particle size range of the oil-soluble temporary plugging agent is between the mesh of 200 mesh~400.
In specific implementation process, the particle size range of the corn flour is between the mesh of 20 mesh~60.
In specific implementation process, the particle size range of the rice meal is between the mesh of 100 mesh~200.
In specific implementation process, the purity of the potassium chloride is 90% or more.
In specific implementation process, the degradation agent includes biological enzyme and oxidant.
In specific implementation process, the cleanup additive includes polymeric alcohol.
In specific implementation process, the wetting agent includes lauryl sodium sulfate, empgen BB.
As can be seen that for fissurity reservoir, and size differ the characteristics of uneven for crack and distribution of pores, (has
A little flaw sizes reach 2mm wide), the present invention temporarily blocks up the corn flour that type workover fluid is added to oil-soluble temporary plugging agent and major diameter,
The particle size distribution range of temporary stifled material is expanded to -400 mesh of 20 mesh.The present invention is by adding hydroxypropyl guar, hydroxypropyl sesbania
The mixing thickener of glue and xanthans improves well workover liquid system to temporarily blocking up material suspending power.The row of helping that the present invention is added
Agent and wetting agent effectively improve the row of returning of stratum liquid after workover treatment.The present invention adds degradation agent, and temporary using oil-soluble
Blocking agent and the corn flour that can be hydrolyzed, after workover treatment, oil and water in stratum can have an effect to temporarily blocking layer, improve and understand
Stifled efficiency, and then reduce the damage to reservoir.
Table 1 is please referred to, table 1 is the stream side performance table of temporarily stifled type workover fluid provided in an embodiment of the present invention, wherein " API is filtered
Mistake " refers to the static filtration of drilling fluid：
The temporarily stifled type workover fluid rheological property table provided in an embodiment of the present invention of table 1
Please continue to refer to table 2, table 2 is temporarily stifled type workover fluid rock core damage test data table provided in an embodiment of the present invention：
The temporarily stifled type workover fluid rock core damage test data table provided in an embodiment of the present invention of table 2
Please continue to refer to table 3, table 3 is temporarily stifled type well workover light-liquid interfacial tension test data table provided in an embodiment of the present invention：
The temporarily stifled type well workover light-liquid interfacial tension test data table provided in an embodiment of the present invention of table 3
Please continue to refer to table 4, table 4 is temporarily stifled type workover fluid sand-bed filtration evaluation test data provided in an embodiment of the present invention
Table：
The temporarily stifled type workover fluid sand-bed filtration evaluation test tables of data provided in an embodiment of the present invention of table 4
| Formula | API dehydrations, mL | Casting bed immersion amount, mL | Average immersion depth cm |
| Solid Free base fluid | 25 | All leakages | / |
| Former temporarily stifled well workover | 20 | 50 | / |
| This temporarily stifled well workover | 14.6 | 0 | 7.8 |
Embodiment 1：Prepare 100 portions of temporarily stifled type workover fluids
2 parts of potassium chloride are added into 95.1 parts of tap water to be uniformly dissolved, are slow added into 0.6 part of thickener, stirring 2 is small
When, it is uniformly dissolved；Sequentially add under stirring conditions 0.4 part of oil-soluble temporary plugging agent, 0.6 portion of corn flour, 0.6 part of rice meal,
0.2 part is cracked degradation agent FGS-1,0.2 part of cleanup additive RS-1,0.3 part of wetting agent FL-1, is stirred evenly to get finished product.
Embodiment 2：Prepare 100 portions of temporarily stifled type workover fluids
1 part of potassium chloride is added into 97.2 parts of tap water to be uniformly dissolved, is slow added into 0.3 part of thickener, stirring 2 is small
When, it is uniformly dissolved；Sequentially add under stirring conditions 0.2 part of oil-soluble temporary plugging agent, 0.4 portion of corn flour, 0.4 part of rice meal,
0.1 part is cracked degradation agent FGS-1,0.2 part of cleanup additive RS-1,0.2 part of wetting agent FL-1, is stirred evenly to get finished product.
Embodiment 3：Prepare 100 portions of temporarily stifled type workover fluids
2 parts of potassium chloride are added into 95.4 parts of tap water to be uniformly dissolved, are slow added into 0.5 part of thickener, stirring 2 is small
When, it is uniformly dissolved；Sequentially add under stirring conditions 0.4 part of oil-soluble temporary plugging agent, 0.8 portion of corn flour, 0.4 part of rice meal,
0.1 part is cracked degradation agent FGS-1,0.1 part of cleanup additive RS-1,0.3 part of wetting agent FL-1, is stirred evenly to get finished product.
Table 5 is please referred to, table 5 is the temporary stifled type workover fluid performance table in three embodiments provided by the invention：
Type workover fluid performance table is temporarily blocked up in 5 embodiment of the present invention of table
The present embodiment second aspect also provides a kind of preparation method of temporarily stifled type workover fluid as described in relation to the first aspect, packet
It includes：
Pure water is put into agitator tank for 95~97 parts, blender is started；
1~2 part of potassium chloride is added to stir evenly；
Liquid in circulation stirring tank, and 0.2~0.6 part of thickener is added by agitator tank by charging hopper, it is sufficiently stirred 1
Hour；
After measuring viscosity with drilling fluid Marsh funnel and being more than 40s, 0.2~0.4 part of oil-soluble temporary plugging agent, 0.4 is added
~0.8 portion of corn flour, 0.4~0.6 rice meal stir 20-30 minutes；
0.1~0.2 part of degradation agent, 0.2~0.3 part of wetting agent, 0.1~0.2 portion of cleanup additive is added, and stirs evenly.
Degradation agent, wetting agent, cleanup additive in configuration method provided in an embodiment of the present invention have been carried out in first aspect
It is discussed in detail, details are not described herein again.
One or more technical solution in the embodiment of the present invention, at least has the following advantages that or advantageous effect：
1, the present invention uses the mixed type thickener of hydroxypropyl guar, hydroxypropyl TQ gums and xanthans, improves to temporary
The suspending power of stifled material, while the filter loss of workover fluid is reduced, wherein thickening material belongs to biogum, it is easier to drop
Solution, and it is environmentally safe；
2, the present invention is using oil-soluble temporary plugging agent, the compound temporarily stifled material of corn flour, rice meal, and particle diameter distribution is in 20 mesh
Between~400 mesh, the wherein grain size of oil-soluble temporary plugging agent is in 200~400 mesh, and the grain size of corn flour is in the mesh of 20 mesh~60, rice
Powder is particle size range in the mesh of 100 mesh~200, and fracture porosity reservoir can play the role of effective temporarily stifled；
3, the present invention use cleanup additive and wetting agent, ensure it is hydrophilic surface tension is reduced to 25mN/m simultaneously,
High temperature rear surface tension is less than 23mN/m, effectively improves the row of returning of stratum liquid after workover treatment.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (7)
1. a kind of temporary stifled type workover fluid suitable for fissurity reservoir, which is characterized in that the component including pressing quality proportioning below：
It is 95~97 parts of pure water, 0.2~0.6 part of thickener, 0.2~0.4 part of oil-soluble temporary plugging agent, 0.4~0.8 part of corn flour, big
Rice flour 0.4~0.6,1~2 part of potassium chloride, 0.1~0.2 part of degradation agent, 0.1~0.2 part of cleanup additive, 0.2~0.3 part of wetting agent；
Wherein, between the mesh of 200 mesh~400, the particle size range of the corn flour exists the particle size range of the oil-soluble temporary plugging agent
Between the mesh of 20 mesh~60, the particle size range of the rice meal is between the mesh of 100 mesh~200.
2. temporarily stifled type workover fluid as described in claim 1, which is characterized in that the thickener is hydroxypropyl guar, hydroxypropyl
The mixture of sesbania gum and xanthans.
3. temporarily stifled type workover fluid as described in claim 1, which is characterized in that the purity of the potassium chloride is 90% or more.
4. temporarily stifled type workover fluid as described in claim 1, which is characterized in that the degradation agent includes biological enzyme and oxidant.
5. temporarily stifled type workover fluid as described in claim 1, which is characterized in that the cleanup additive includes polymeric alcohol.
6. temporarily stifled type workover fluid as described in claim 1, which is characterized in that the wetting agent includes lauryl sodium sulfate,
Empgen BB.
7. a kind of preparation method of the temporarily stifled type workover fluid in 1-6 such as claim as described in any claim, which is characterized in that packet
It includes：
Pure water is put into agitator tank for 95~97 parts, blender is started；
1~2 part of potassium chloride is added to stir evenly；
Liquid in circulation stirring tank, and 0.2~0.6 part of thickener is added by agitator tank by charging hopper, it is small to be sufficiently stirred 1
When；
After measuring viscosity with drilling fluid Marsh funnel and being more than 40s, 0.2~0.4 part of oil-soluble temporary plugging agent, 0.4~0.8 is added
Part corn flour, 0.4~0.6 rice meal, are stirred 20-30 minutes；
0.1~0.2 part of degradation agent, 0.2~0.3 part of wetting agent, 0.1~0.2 portion of cleanup additive is added, and stirs evenly；
Wherein, between the mesh of 200 mesh~400, the particle size range of the corn flour exists the particle size range of the oil-soluble temporary plugging agent
Between the mesh of 20 mesh~60, the particle size range of the rice meal is between the mesh of 100 mesh~200.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107619659A (en) * | 2016-07-13 | 2018-01-23 | 中国石油天然气股份有限公司 | Low solid phase oil-soluble temporarily blocks up type workover fluid and its preparation method and application |
| CN107987812A (en) * | 2017-11-16 | 2018-05-04 | 严希海 | A kind of workover fluid and preparation method thereof |
| CN109294539B (en) * | 2018-09-25 | 2021-03-09 | 中国石油天然气股份有限公司 | Fire flooding well environment-friendly channeling sealing agent and preparation method and application thereof |
| CN111394077B (en) * | 2019-01-02 | 2022-06-03 | 中国石油天然气股份有限公司 | Temporary plugging workover fluid and preparation method thereof |
| CN110846014B (en) * | 2019-12-04 | 2022-04-01 | 中国石油天然气集团有限公司 | Low-damage well killing fluid for low-pressure gas well and preparation method |
| CN113308230A (en) * | 2021-06-15 | 2021-08-27 | 克拉玛依市红都有限责任公司 | Temporary plugging type low-free hydraulic well fluid and preparation method thereof |
| CN114958323B (en) * | 2022-05-26 | 2023-06-09 | 长江大学 | Self-degrading gel for reservoir plugging and preparation method thereof |
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| CN102653673A (en) * | 2012-01-05 | 2012-09-05 | 中国石油天然气股份有限公司 | Biodegradable temporary plugging additive |
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| CN102653673A (en) * | 2012-01-05 | 2012-09-05 | 中国石油天然气股份有限公司 | Biodegradable temporary plugging additive |
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