CN106281272B - A kind of fracture-type reservoir bridge joint sealing agent and the preparation method and application thereof - Google Patents
A kind of fracture-type reservoir bridge joint sealing agent and the preparation method and application thereof Download PDFInfo
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- CN106281272B CN106281272B CN201510276520.XA CN201510276520A CN106281272B CN 106281272 B CN106281272 B CN 106281272B CN 201510276520 A CN201510276520 A CN 201510276520A CN 106281272 B CN106281272 B CN 106281272B
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- theobromine
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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
- C09K8/504—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
- C09K8/514—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
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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
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/08—Fiber-containing well treatment fluids
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/18—Bridging agents, i.e. particles for temporarily filling the pores of a formation; Graded salts
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The present invention provides a kind of fracture-type reservoir bridge joint sealing agent and the preparation method and application thereof.The sealing agent includes: bridging materials, calcium carbonate granule, asphalt powder and the molten fiber of theobromine；The bridging materials are quartz sand and/or haydite；The molten fiber of theobromine is one of polyester fiber, two type acetate fibers, three type acetate fibers, alkali-free glass fibre or combination；On the basis of the total weight of the sealing agent, the weight percent of each component are as follows: bridging materials: 15-30%；Calcium carbonate granule: 50-70%；Asphalt powder: 5-15%；The molten fiber of theobromine: 5-15%.Sealing agent of the invention can block the crack of 1-5mm wide, and bearing capacity reaches 15MPa or more, and for acid-soluble ratio up to 70% or more, and after acidification de-plugging, not sour molten rigid particles can prevent reservoir stress sensitivity from damaging, and be effectively protected oil-gas Layer.
Description
Technical field
The present invention relates to drilling plugging agent fields, further say, be related to a kind of fracture-type reservoir bridge joint sealing agent and
Preparation method and application.
Background technique
Leakage refers to that during the various underground work such as drilling well, well of having cemented the well, test or well workover, various working solutions (wrap
Include drilling fluid, cement slurry, completion fluid and other liquid) under the action of pressure difference, flow into a kind of down hole problem on stratum.Well
Leakage can not only expend drilling time, lose drilling fluid, and be possible to a series of down hole problems such as cause card, spray, collapse, sternly
It will lead to wellbore when weight to scrap, cause huge economic loss.In addition, Reservoir Section leakage can also cause serious formation damage.
Non- Reservoir Section is missed, is generally selected to use different permanent plugging materials according to leakoff rate.For seeping
A certain amount of single envelope, impermeable dose, calcium carbonate superfine powder, sulfonated gilsonite etc. thin is mainly added in permeability leakage in drilling fluid
The material of grain, with brill leak-proof leak-stopping.For partial loss, different type, different shape and different size of bridge are usually used
Stifled material carries out stopping boring leak stopping.For severe mud losses, ordinary cement, accelerated cement, thixotroping cement, foam water are substantially used
The leakage stopping technologies such as mud, gel+cement, diesel oil-bentonite-cement.
Reservoir Section is missed, in order to be effectively protected reservoir, the plugging material for capableing of de-plugging must be used, commonly referred to as temporarily
Stifled material.Although and cement, bridge joint plugging material plugging effect are preferable, are not easy de-plugging and are not suitable for reservoir leak stopping.Temporarily stifled material
Material can be divided into returning and mediate that stifled, oily dissolution is stifled and acid dissolution is stifled according to de-plugging mechanism.The row's of returning class diverting agent is mainly PB-1, list
Envelope is essentially relying on the borehole wall and is formed about thin and compact plugged zone to improve anti-row's efficiency, anti-row's recovery rate and reservoir property
It is closely related, it is difficult to return completely and is discharged；Oil-soluble temporary plugging agent is mainly based on various oil-soluble resins, since oil-soluble temporarily blocks up
It is needed when filter cake removal using oil based material, oil based material higher cost and the problems such as environmental pollution can be brought, therefore limited
The extensive use of oil-soluble material.Effect is preferably also the most frequently used to block up material, most common answering for calcium carbonate at different levels for acid dissolution
With sealing agent, de-plugging is carried out by way of pickling.Because fracture-type reservoir has stronger stress sensitivity, plugging operations
When, crack will broaden under High Pressure Difference effect, and plugging material is squeezed into crack, and plugged zone is formed in crack.Completion practice
When, stifled using acid dissolution, after acid-soluble plugging material is dissolved by acid solution, crack has lacked effective support.When production operation, well
Interior pressure reduction, crack will narrow under closure stress effect, and oil and gas production is caused to be remarkably decreased.
From the point of view of the trend that leak-proof leak-stopping technology develops, the prevention of leakage and reservoir protection will be paid more and more attention, therefore,
More effective leak preventive and sealing agent suitable for reservoir will be developing direction in a few years from now on.
Summary of the invention
To solve the problem in the prior art, the present invention provides a kind of fracture-type reservoir bridge joint sealing agents, preparation
Method and application.Sealing agent of the invention is not only able to preferably block crack, increases substantially Formation bearing pressure, and solve
It can also make crack flow conductivity with higher after stifled, when production operation can prevent crack closure, so that leak stopping is made
Industry has both the effect of reservoir reconstruction, improves the yield of fracture-type reservoir.
An object of the present invention is to provide a kind of fracture-type reservoir bridge joint sealing agent.
Include:
Bridging materials, calcium carbonate granule, asphalt powder and the molten fiber of theobromine；
The bridging materials are quartz sand and/or haydite；
The molten fiber of theobromine is polyester fiber, two type acetate fibers, three type acetate fibers, one in alkali-free glass fibre
Kind or combination；
On the basis of the total weight of the sealing agent, the weight percent of each component are as follows: bridging materials: 15-30%；Carbonic acid
Calcium particle: 50-70%；Pitch: 5-15%；The molten fiber of theobromine: 5-15%.
Preferably, calcium carbonate granule is divided into 3 grades according to granularity, and the partial size of the first order is 0.17-0.25 times of fracture width,
The partial size of the second level is 0.08-0.1 times of fracture width, and the partial size of the third level is 0.04-0.06 times of fracture width, three grades
Other partial size percentage are as follows: 40-55%:30-45%:10-25%.
Using intensity is high, sphericity is high, not sour molten rigid particles are as bridging materials, which is in quartz sand and haydite
One or two, partial size is preferably 0.8-1.2 times of fracture width, after Reservoir Acidization, because the material is not sour molten, and in height
Closure stress under be not crushed, can be used as fracture support agent prevent reservoir stress sensitivity damage.Using calcium carbonate granule as
It is infiltrative to play the role of reduction plugged zone for filling the hole between rigid particles for packing material.Use softening point and ground
The pitch of layer Temperature Matching blocks micropore, further decreases the permeability of plugged zone, which can use Negative Pressure Difference and return
It mediates stifled.Using the molten fiber of theobromine in crack " lacing wire ", in order to the plugged zone quickly formed, therefore, the fibre length
Preferably 1.5-2 times of fracture width, the fiber are preferably polyester fiber, two type acetate fibers, three type acetate fibers, alkali-free glass
One of glass fiber is a variety of.
The second object of the present invention is to provide a kind of preparation method of fracture-type reservoir bridge joint sealing agent, this method comprises:
The molten fiber of theobromine of the bridging materials and appropriate length of appropriate particle size is selected according to fracture width, and each component is mixed in proportion
Uniformly.
The third object of the present invention is to provide a kind of application of fracture-type reservoir bridge joint sealing agent.
For the crack of different in width, the particle size of non-acid molten rigid particles and calcium carbonate is selected, then is aided with the molten fibre of acid
Peacekeeping plugging material, can block the crack of 1-5mm wide, and bearing capacity is greater than 15MPa.After material acidification, in addition to non-acid-soluble
Outside rigid material, remaining material is all dissolved away by acid or is discharged under back pressure difference, and rigid particles prevent crack closure, plays guarantor
Protect the effect of oil-gas Layer.
Sealing agent of the invention can block the crack of 1-5mm wide, and bearing capacity reaches 15MPa or more, and acid-soluble ratio is up to 70%
More than, and after acidification de-plugging, reservoir fracture condudtiviy still with higher is highly beneficial to reservoir protection, and acid is insoluble
Rigid particles can prevent reservoir stress sensitivity from damaging, and be effectively protected oil-gas Layer.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated.
Embodiment 1:
Base slurry: bentonite 5；NaCO3: 0.25；Water: 100 (parts by weight).
Sealing agent of the invention:
On the basis of the total weight of the sealing agent, the weight percent of each component are as follows:
Quartz sand 14-20 mesh: 24%；
Calcium carbonate 40-60 mesh: 25%；
Calcium carbonate 80-150 mesh: 25%；
Calcium carbonate 400-600 mesh: 15%；
Asphalt powder: 5%；
Acetate fiber: 6%, length 1.8mm.
Said components are mixed, the bridge joint plugging material mixed tests plugging effect in the usual way, should
The man-made fracture of 1mm wide can be effectively blocked in plugging material, and bearing capacity is greater than 15MPa, and acid of the sealing agent under 15% hydrochloric acid is molten
Rate is 70.5%.
Embodiment 2:
Base slurry: bentonite 5；NaCO3: 0.25；Water: 100 (parts by weight).
Sealing agent of the invention:
On the basis of the total weight of the sealing agent, the weight percent of each component are as follows:
Quartz sand 6-8 mesh: 20%；
Calcium carbonate 16-30 mesh: 25%；
Calcium carbonate 60-120 mesh: 25%；
Calcium carbonate 400-600 mesh: 12%；
Asphalt powder: 8%；
Two type acetate fibers: 10%, length 5mm.
Said components are mixed, the bridge joint plugging material mixed tests plugging effect in the usual way, should
The man-made fracture of 3mm wide can be effectively blocked in plugging material, and bearing capacity is greater than 15MPa, and acid of the sealing agent under 15% hydrochloric acid is molten
Rate is 71.5%.
Embodiment 3:
Base slurry: bentonite 5；NaCO3: 0.25；Water: 100 (parts by weight).
Sealing agent of the invention:
On the basis of the total weight of the sealing agent, the weight percent of each component are as follows:
Quartz sand 4-6 mesh: 18%；
Calcium carbonate 16-30 mesh: 25%；
Calcium carbonate 60-120 mesh: 25%；
Calcium carbonate 320-400 mesh: 13%；
Asphalt powder: 7%；
Three type acetate fibers: 12%, length 8mm.
Said components are mixed, the bridge joint plugging material mixed tests plugging effect in the usual way, should
The man-made fracture of 5mm wide can be effectively blocked in plugging material, and bearing capacity is greater than 15MPa, and acid of the sealing agent under 15% hydrochloric acid is molten
Rate is 74.5%.
Embodiment 4:
Base slurry: bentonite 5；NaCO3: 0.25；Water: 100 (parts by weight).
Sealing agent of the invention:
On the basis of the total weight of the sealing agent, the weight percent of each component are as follows:
Haydite 14-20 mesh: 24%；
Calcium carbonate 40-60 mesh: 25%；
Calcium carbonate 80-150 mesh: 25%；
Calcium carbonate 400-600 mesh: 15%；
Asphalt powder: 5%；
Polyester fiber: 6%, length 1.8mm.
Said components are mixed, the bridge joint plugging material mixed tests plugging effect in the usual way, should
The man-made fracture of 1mm wide can be effectively blocked in plugging material, and bearing capacity is greater than 15MPa, and acid of the sealing agent under 15% hydrochloric acid is molten
Rate is 70.4%.
Embodiment 5:
Base slurry: bentonite 5；NaCO3: 0.25；Water: 100 (parts by weight).
Sealing agent of the invention:
On the basis of the total weight of the sealing agent, the weight percent of each component are as follows:
Quartz sand 6-8 mesh: 20%；
Calcium carbonate 16-30 mesh: 25%；
Calcium carbonate 60-120 mesh: 25%；
Calcium carbonate 400-600 mesh: 12%；
Asphalt powder: 8%；
Alkali-free glass fibre: 10%, length 5mm.
Said components are mixed, the bridge joint plugging material mixed tests plugging effect in the usual way, should
The man-made fracture of 3mm wide can be effectively blocked in plugging material, and bearing capacity is greater than 15MPa, and acid of the sealing agent under 15% hydrochloric acid is molten
Rate is 70.6%.
Comparative example 1:
Base slurry: bentonite 5；NaCO3: 0.25；Water: 100 (parts by weight).
Reservoir sealing agent is commonly used at present:
On the basis of the total weight of the common reservoir sealing agent, the weight percent of each component are as follows:
Calcium carbonate 14-20 mesh: 24%；
Calcium carbonate 40-60 mesh: 25%；
Calcium carbonate 80-150 mesh: 25%；
Calcium carbonate 400-600 mesh: 16%.
Asbestos fibre: 10%.
Each component is mixed to get plugging material, tests plugging effect.
The plugging effect of above each example is shown in Table 1.
1 plugging effect of table
Remarks: it is 1500mL that total amount is starched in leak stopping.
By taking the plugging formula of slit width 1mm as an example, carry out fracture condudtiviy evaluation after plugging material acid is molten, experimental result is shown in
Table 2.
2 fracture condudtiviy evaluation result of table
As can be seen from Table 1 and Table 2, sealing agent of the invention bearing capacity with higher, plugging material is by acid dissolution
Fracture condudtiviy still with higher, highly beneficial to reservoir protection after removing.
Claims (7)
1. a kind of fracture-type reservoir bridges sealing agent, it is characterised in that the sealing agent is composed of the following components:
Bridging materials, calcium carbonate granule, asphalt powder and the molten fiber of theobromine；
The bridging materials are quartz sand and/or haydite；
The molten fiber of theobromine be one of polyester fiber, two type acetate fibers, three type acetate fibers, alkali-free glass fibre or
Combination；
On the basis of the total weight of the sealing agent, the weight percent of each component are as follows:
Bridging materials: 15-30%；Calcium carbonate granule: 50-70%；Asphalt powder: 5-15%；The molten fiber of theobromine: 5-15%；
The calcium carbonate granule is divided into 3 grades according to granularity, and the partial size of the first order is 0.16-0.32 times of fracture width, the second level
Partial size be 0.08-0.12 times of fracture width, 0.02-0.06 times for fracture width of the partial size of the third level, three rank grains
Diameter percentage: 40-55%:30-45%:10-25%.
2. fracture-type reservoir as described in claim 1 bridges sealing agent, it is characterised in that:
The partial size of the bridging materials is 0.8-1.2 times of fracture width.
3. fracture-type reservoir as described in claim 1 bridges sealing agent, it is characterised in that:
The length of the molten fiber of theobromine is 1.5-2 times of fracture width.
4. the fracture-type reservoir as described in one of claims 1 to 3 bridges sealing agent, it is characterised in that: with the sealing agent
On the basis of total weight, the weight percent of each component are as follows:
Bridging materials: 18-25%；Calcium carbonate granule: 60-65%；Asphalt powder: 5-8%；The molten fiber of theobromine: 6-12%.
5. the preparation method of the fracture-type reservoir bridge joint sealing agent as described in one of Claims 1 to 4, it is characterised in that: according to
Fracture width selects the molten fiber of theobromine of the bridging materials and appropriate length of appropriate particle size, and each component is mixed in proportion
It is even.
6. the application of the fracture-type reservoir bridge joint sealing agent as described in one of Claims 1 to 4.
7. application as claimed in claim 6, which is characterized in that the sealing agent is used for the crack that width is 1-5mm.
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| CN114507514B (en) * | 2020-11-16 | 2023-06-30 | 中国石油化工股份有限公司 | Bridging plugging agent and preparation method and application thereof |
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| CN115612465A (en) * | 2022-08-30 | 2023-01-17 | 新疆格瑞迪斯石油技术股份有限公司 | Self-degradation plugging agent for fractured reservoir |
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