CN109796943A - Drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent and preparation method thereof - Google Patents
Drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent and preparation method thereof Download PDFInfo
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- CN109796943A CN109796943A CN201910151398.1A CN201910151398A CN109796943A CN 109796943 A CN109796943 A CN 109796943A CN 201910151398 A CN201910151398 A CN 201910151398A CN 109796943 A CN109796943 A CN 109796943A
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Abstract
The present invention relates to oil drilling field of material technology, especially drilling fluid fractured reservoir high resiliency, high temperature resistance sealing agent and preparation method thereof, by sponge fiber, filler particles, receive a micron lubricant, viscosity modifier composition, using elastic material as framework material, it is easy to carry out inside crack, and it is formed and is built bridge in inside, it is made of material resistant to high temperatures, leak stopping success rate can be effectively improved, avoid the generation for repeating to miss, the sealing agent has good anelasticity, especially it is being directed to large fracture and cave leakage, effective closure can be formed in drop ply position, simultaneously, also ensure that sealing agent has preferable mobility in drilling fluid, prevent the appearance of down hole problem caused by being deteriorated because of rheological characteristic.
Description
Technical field
The present invention relates to oil drilling field of material technology, especially drilling fluid fractured reservoir high resiliency, Gao Kangwen
Sealing agent and preparation method thereof.
Background technique
Leakage refers to during the various underground work such as drilling well, well cementation, test or well workover, various working solutions (including
Drilling fluid, cement slurry, completion fluid and other working fluids etc.) the phenomenon that leaking into stratum under differential pressure action.Leakage is to influence to bore
One of the complex situations for endangering most serious of well operations safety, the generation of leakage not only can make troubles and lose to drilling engineering
(if expended drilling time, drilling fluid and plugging material is lost, causes a series of complex situation such as bit freezing, blowout, well slough, even
Cause wellbore to be scrapped, but also payzone can be damaged, lead to heavy economic losses), it is also the exploration and development of petroleum resources
Bring extreme difficulties.In recent years, with the progress of oil-gas exploration and development, marginal well, deep-well, special formation well gradually increase；With
Show loving care for adopt and pressure break influence increasingly increase, the bearing capacity of formation is greatly lowered；In order to save development cost, many oil fields
The long open hole well construction of multi pressure series of strata is carried out, above situation makes circulation problems more prominent.
According to statistics, more than half petroleum gas yield of the whole world comes from intrinsic fracture oil-gas reservoir at present, splits
The oil-gas reservoir of seam property will be one of the main direction produced in the following oil gas increasing the storage.During fractured reservoir wellbore construction, easily
It misses, leakproof and the leak stopping capability on drilling fluid fracture stratum must be improved in drilling process.Currently, domestic some stones
Oily worker has carried out some leakage stopping technology researchs that can either be improved plugging effect and be conducive to oil layer protection again.Currently,
Sealing agent is primarily present bridge type sealing agent, high dehydration sealing agent, temporarily stifled type sealing agent, expansion class sealing agent, cement rapid hardening
The several types such as class sealing agent, curable type sealing agent, composite material sealing agent.As application No. is CN201510170095.6
Patent of invention, disclose it is a kind of as sealing agent can ambient cure composition, include: hydroxy compounds, organic acid and isocyanic acid
Ester group compound.The position of leak stopping is needed when the polymer is injected into, when as in nearly borehole wall macrovoid or viscous crude channel, on ground
Stressor layer and at a temperature of voluntarily cure hard, block macrovoid lost-circulation zone or block condensed oil polluted channel or the nearly borehole wall viscous crude of isolation
Layer is realized and blocks purpose, and drilling fluid leakage channel or condensed oil polluted source are cut off, and thoroughly solves drilling fluid leakage or viscous crude infringement is bored
The problem of well liquid, it is ensured that drilling well work is gone on smoothly.But the sealing agent is mainly used for the severe mud losses such as macrovoid leakage, for
The lesser fractured leakage of leak-off velocity is difficult to play a role, and require in use must be accurate for the polymer sealing agent
Measure formation temperature and pressure.
Application No. is the patents of invention of CN201610826124.4, and it is compound without crosslinking supermolecule to disclose a kind of high pressure-bearing
GEL USED FOR PLUGGING WELL LOST CIRCULATION and preparation method thereof, based on parts by weight, the GEL USED FOR PLUGGING WELL LOST CIRCULATION includes following components: non-ionic monomer 83~
90 parts, 2~4 parts of anionic monomer, 7~10 parts of cationic monomer, 1~3 part of biological polyoses, 0.001~0.005 part of initiator.
PH value is adjusted the preparation method comprises the following steps: anionic monomer is put into the three neck round bottom flask for fill water, non-ionic monomer is then added,
It is stirring evenly and then adding into initiator, heating reaction, adds cationic monomer, the reaction was continued under confined conditions；Then it shreds, dry
Dry, crushing, obtains white solid powder.Biological polyoses are uniformly mixed with white solid powder, as target product.The present invention
The high pressure-bearing is dissolved in the sealing agent being made into after water and forms continuous space net rack without crosslinking supermolecule plural gel sealing agent
Structure improves the bearing capacity and intensity of sealing agent, is not easy to repeat to miss.But the sealing agent is prepared by chemical synthesis
At more demanding to inorganic agent raw material and reaction process.
Part researcher is acted on using sponge and being applied with the framework material of the high matching in crack.It such as filters sponge, prevent
Sea of fire silk floss etc..Such as patent of invention 201410164250.9 " a kind of the agent of oil gas well drilling pressurization sealing and its preparation and application ", mention
A kind of oil gas well drilling pressurization sealing agent out, soil, mica powder and clear as elastic sponge fiber, oil-well cement, ground slag, calcium
Water mixing composition, can be used for oil gas well drilling pressurization sealing.But in general, there is extemporaneous preparations for above-mentioned part plugging material
Complexity, stability is poor, need to make a trip, and time-consuming, formula specific aim is poor；Plugging material heat-resisting property is weak, is easy to lose at high temperature
Effect, there is a phenomenon where repetitions to miss, and elasticity is weak, poor with crack matching, cannot restore shape after carrying out crack, be unfavorable for
Later period implements bridge formation networking, and use is single, cannot carry out leak stopping for a plurality of types of leakages；Sealing agent anelasticity is poor, especially
It is being directed to large fracture and cave leakage, effective closure cannot formed in drop ply position, meanwhile, sealing agent flows in drilling fluid
Property is poor, causes the appearance of down hole problem.
Summary of the invention
In view of the above shortcomings of the prior art, the present invention provides drilling fluid fractured reservoir high resiliency, high temperature resistance are stifled
Agent and preparation method thereof is leaked, it is convenient to prepare, and using elastic material as framework material, is easy to carry out inside crack, and in inside
It is formed and is built bridge, it is made of material resistant to high temperatures, can effectively improve leak stopping success rate, avoids the generation for repeating to miss.
In order to solve the above technical problems, the technical solution used in the present invention is: drilling fluid fractured reservoir high resiliency,
High temperature resistance sealing agent by sponge fiber, filler particles, is received a micron lubricant, viscosity modifier and is formed, wherein each component weight hundred
Divide ratio are as follows:
Sponge fiber 5% ~ 25%；
Filler particles 70% ~ 85%；
Receive micron lubricant 1% ~ 7%；
Viscosity modifier 1% ~ 5%.
Above-mentioned drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent, the sponge fiber are polyurethane sponge.
Above-mentioned drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent, the filler particles are sawdust, quartz
Powder, calcium carbonate, calcite, composition one or more of in rubber granule.
Above-mentioned drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent, micron lubricant of receiving is that silica gel is micro-
Ball, nano-titanium dioxide, glass microballoon, composition one or more of in phenolic resin bead.
Above-mentioned drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent, the viscosity modifier are PVA, lithium soap
One or more of composition in stone, polyacrylamide.
The preparation method of drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent, comprising the following steps:
(1), by filler particles and a micron mix lubricant of receiving；
(2), viscosity modifier mixing is added, viscosity modifier is controlled in mixed process is mixed into speed, is uniformly mixed；
(3), sponge fiber is added, stirs to uniformly mixed.
The preparation method of above-mentioned drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent, the viscosity modifier
It, be respectively by the viscous of selection when selecting two or more viscosity modifiers with filler particles and when receiving micron lubricant with mixing
Degree regulator is mixed into, and in the mixed process of each viscosity modifier, controls its mixed speed respectively, is uniformly mixed.
The beneficial effect of drilling fluid of the present invention fractured reservoir high resiliency, Gao Kangwen sealing agent and preparation method thereof is:
(1) plugging material has good heat-resisting property, will not fail under high temperature again, can avoid the generation for repeating leakage；
(2) sponge fiber has preferable elasticity in sealing agent of the present invention, has preferable matching with crack, is conducive to carry out
Crack deep, meanwhile, shape can be restored after carrying out crack, be conducive to implement bridge formation networking, all had for a plurality of types of leakages
There is preferable leak stopping to act on.
(3) micron lubricant of receiving can form bearing effect, facilitate sponge fiber and enter crack, play the work of lubrication protection
With.
(4) viscosity of viscosity modifier can vary with temperature, and guarantee that sealing agent carries out drop ply position under reasonable viscosity, have
There is good anelasticity, is especially being directed to large fracture and cave leakage, effective closure can formed in drop ply position, meanwhile,
Also ensure that sealing agent has preferable mobility in drilling fluid, down hole problem goes out caused by preventing because of rheological characteristic variation
It is existing.
Specific embodiment
It elaborates combined with specific embodiments below to the present invention.
Embodiment 1, drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent, by sponge fiber, filler particles, receives
Micron lubricant, viscosity modifier form, wherein weight percentage of each component are as follows:
Sponge fiber 5%；
Filler particles 70%；
Receive micron lubricant 1%；
Viscosity modifier 1%.
Embodiment 2, drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent, by sponge fiber, filler particles, receives
Micron lubricant, viscosity modifier form, wherein weight percentage of each component are as follows:
Sponge fiber 15%；
Filler particles 78%；
Receive micron lubricant 5%；
Viscosity modifier 3%.
Embodiment 3, drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent, by sponge fiber, filler particles, receives
Micron lubricant, viscosity modifier form, wherein weight percentage of each component are as follows:
Sponge fiber 25%；
Filler particles 85%；
Receive micron lubricant 7%；
Viscosity modifier 5%.
Embodiment 4, drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent, by polyurethane sponge, calcium carbonate, silicon
Glue microballoon, PVA are formed, wherein weight percentage of each component are as follows:
Polyurethane sponge 25%；
Calcium carbonate 70%；
Silica gel microball 3%；
PVA 2%。
Embodiment 5, drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent, by polyurethane sponge, silica flour, side
Xie Shi, silica gel microball, PVA, hectorite form, wherein weight percentage of each component are as follows:
Polyurethane sponge 5%；
Silica flour 40%；
Calcite 45%；
Glass microballoon 6%；
PVA 2%；
Hectorite 2%.
Embodiment 6, drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent, by polyurethane sponge, silica flour, side
Xie Shi, rubber granule, silica gel microball, PVA, hectorite, polyacrylamide form, wherein weight percentage of each component are as follows:
Polyurethane sponge 18%；
Silica flour 30%；
Calcite 20%；
Rubber granule 24%；
Phenolic resin bead 3%；
PVA 2%；
Hectorite 2%；
Polyacrylamide 1%.
The PVA is polyvinyl alcohol.
The preparation method of drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent, comprising the following steps:
(1), by filler particles and a micron mix lubricant of receiving；
(2), viscosity modifier mixing is added, viscosity modifier is controlled in mixed process is mixed into speed, is uniformly mixed；
(3), sponge fiber is added, stirs to uniformly mixed.
The preparation method of above-mentioned drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent, the viscosity modifier
It, be respectively by the viscous of selection when selecting two or more viscosity modifiers with filler particles and when receiving micron lubricant with mixing
Degree regulator is mixed into, and in the mixed process of each viscosity modifier, controls its mixed speed respectively, is uniformly mixed.
Certainly, above description is not limitation of the present invention, and the present invention is also not limited to the example above, the art
The variations, modifications, additions or substitutions made within the essential scope of the present invention of those of ordinary skill, also should belong to the present invention
Protection scope.
Claims (7)
1. drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent, it is characterised in that: by sponge fiber, filler particles, receive
Micron lubricant, viscosity modifier composition, weight percentage of each component are as follows:
Sponge fiber 5% ~ 25%；
Filler particles 70% ~ 85%；
Receive micron lubricant 1% ~ 7%；
Viscosity modifier 1% ~ 5%.
2. drilling fluid according to claim 1 fractured reservoir high resiliency, Gao Kangwen sealing agent, characterized in that described
Sponge fiber is polyurethane sponge.
3. drilling fluid according to claim 1 or 2 fractured reservoir high resiliency, Gao Kangwen sealing agent, characterized in that institute
Filler particles are stated as composition one or more of in sawdust, silica flour, calcium carbonate, calcite, rubber granule.
4. drilling fluid according to claim 1 or 2 fractured reservoir high resiliency, Gao Kangwen sealing agent, characterized in that institute
It states and receives micron lubricant as combination one or more of in silica gel microball, nano-titanium dioxide, glass microballoon, phenolic resin bead
Object.
5. drilling fluid according to claim 1 or 2 fractured reservoir high resiliency, Gao Kangwen sealing agent, characterized in that institute
Viscosity modifier is stated as composition one or more of in PVA, hectorite, polyacrylamide.
6. the preparation method of drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent, it is characterised in that: including following step
It is rapid:
(1), by filler particles and a micron mix lubricant of receiving；
(2), viscosity modifier mixing is added, viscosity modifier is controlled in mixed process is mixed into speed, is uniformly mixed；
(3), sponge fiber is added, stirs to uniformly mixed.
7. the preparation method of drilling fluid according to claim 6 fractured reservoir high resiliency, Gao Kangwen sealing agent, special
Sign is, the viscosity modifier and filler particles and when receiving micron lubricant with mixing, when selecting two or more viscosity modifiers
When, the viscosity modifier of selection to be mixed into respectively, and in the mixed process of each viscosity modifier, control it respectively and be mixed into
Speed, be uniformly mixed.
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| CN201910151398.1A CN109796943A (en) | 2019-02-28 | 2019-02-28 | Drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent and preparation method thereof |
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| CN201910151398.1A CN109796943A (en) | 2019-02-28 | 2019-02-28 | Drilling fluid fractured reservoir high resiliency, Gao Kangwen sealing agent and preparation method thereof |
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Cited By (5)
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|---|---|---|---|---|
| CN110878200A (en) * | 2019-12-05 | 2020-03-13 | 西南石油大学 | High-bearing-density self-adaptive plugging material for fracture leakage stratum |
| CN112980408A (en) * | 2019-12-13 | 2021-06-18 | 中国石油化工股份有限公司 | High-pressure brine layer crack type leakage plugging agent and preparation method and application thereof |
| CN114075432A (en) * | 2020-08-20 | 2022-02-22 | 中国石油化工股份有限公司 | Deep plugging adjusting system for heavy oil thermal production well and steam steering method |
| CN114250065A (en) * | 2020-09-25 | 2022-03-29 | 中石化石油工程技术服务有限公司 | Plugging agent containing modified elastic framework material |
| CN115368881A (en) * | 2021-05-21 | 2022-11-22 | 中国石油化工集团有限公司 | Density-adjustable high-strength temperature-resistant plugging material and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110878200A (en) * | 2019-12-05 | 2020-03-13 | 西南石油大学 | High-bearing-density self-adaptive plugging material for fracture leakage stratum |
| CN112980408A (en) * | 2019-12-13 | 2021-06-18 | 中国石油化工股份有限公司 | High-pressure brine layer crack type leakage plugging agent and preparation method and application thereof |
| CN112980408B (en) * | 2019-12-13 | 2023-09-19 | 中国石油化工股份有限公司 | High-pressure saline layer crack type leakage plugging agent and preparation method and application thereof |
| CN114075432A (en) * | 2020-08-20 | 2022-02-22 | 中国石油化工股份有限公司 | Deep plugging adjusting system for heavy oil thermal production well and steam steering method |
| CN114250065A (en) * | 2020-09-25 | 2022-03-29 | 中石化石油工程技术服务有限公司 | Plugging agent containing modified elastic framework material |
| CN114250065B (en) * | 2020-09-25 | 2022-12-23 | 中石化石油工程技术服务有限公司 | Plugging agent containing modified elastic framework material |
| CN115368881A (en) * | 2021-05-21 | 2022-11-22 | 中国石油化工集团有限公司 | Density-adjustable high-strength temperature-resistant plugging material and preparation method thereof |
| CN115368881B (en) * | 2021-05-21 | 2024-04-19 | 中国石油化工集团有限公司 | Density-adjustable high-strength temperature-resistant plugging material and preparation method thereof |
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