CN104694095B - Permselective property blocking agent insulating liquid and its application method - Google Patents
Permselective property blocking agent insulating liquid and its application method Download PDFInfo
- Publication number
- CN104694095B CN104694095B CN201510077817.3A CN201510077817A CN104694095B CN 104694095 B CN104694095 B CN 104694095B CN 201510077817 A CN201510077817 A CN 201510077817A CN 104694095 B CN104694095 B CN 104694095B
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- Prior art keywords
- blocking agent
- insulating liquid
- permselective property
- parts
- squeezing
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Classifications
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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
- C09K8/5045—Compositions based on water or polar solvents containing inorganic compounds
-
- 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
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/138—Plastering the borehole wall; Injecting into the formation
-
- 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
Abstract
The present invention relates to a kind of permselective property blocking agent insulating liquid, it is made by the component of following weight proportion：1 ~ 5 part of sodium hydroxide, 5 ~ 10 parts of na montmorillonite, 0.05 ~ 0.1 part of calgon are added in 100 parts of water.The permselective property blocking agent insulating liquid is used for the use for coordinating blocking agent, can effectively strengthen the plugging effect of blocking agent, extend closure timeliness.In the forward and backward operation for carrying out squeezing permselective property blocking agent insulating liquid of squeezing blocking agent in application method, stratum is handled, improves ground environment, blocking agent is reduced and is diluted, is disturbed, being difficult to solidify equivalent risk, ensure construction safety, improve shut-off capacity.
Description
Technical field
The present invention relates to a kind of insulating liquid, more particularly to a kind of permselective property blocking agent insulating liquid, meanwhile, the present invention is also
It is related to the application method of this permselective property blocking agent insulating liquid.
Background technology
Most of the country oil field all has enter into waterflooding extraction mode and exploited, long-term waterflooding extraction, then due to oil reservoir
Anisotropism, oil, the difference in water viscosity and the imbalance in profit well group, necessarily cause to inject water and dashed forward along high permeable strip
Enter, channelling involves that degree is low to less permeable layer to producing well, cause the cycle efficieny for injecting water low.People are seeking to adopt
Tar productivity is improved with various technologies and means, wherein oilwell water shutoff, Profile Control in Injection Well obtains as a kind of effective technological means
To being widely applied, but usually used blocking agent is often present in stratum by duct liquid diluting, reduces solidifiability, envelope
Stifled effect is poor；The problems such as displacement process easily runs slag, influences post-treatment operations, damages equipment, and closure timeliness is short.
The content of the invention
To solve the deficiencies in the prior art, the invention provides a kind of permselective property for improving plugging effect to block up
Agent insulating liquid.
To achieve the above object, permselective property blocking agent insulating liquid of the invention, by the component system of following weight proportion
：1 ~ 5 part of sodium hydroxide, 5 ~ 10 parts of na montmorillonite, 0.05 ~ 0.1 part of calgon are added in 100 parts of water.
In the component of permselective property blocking agent insulating liquid, na montmorillonite is used to combine a certain amount of high price in the duct of stratum
Cation, caused by avoiding these ions the problem of blocking agent closure setting time shortening, while have one after na montmorillonite aquation
Fixed solid phase and viscosity, the permselective property blocking agent insulating liquid is set to possess certain permeability selectivity, will not be without selection
All stratum of entrance of property, simultaneously as solid concentration is more much lower than blocking agent in insulating liquid, will enter relatively low infiltration
Property stratum, for blocking agent play a role provide early-stage preparations；Sodium hydroxide is used to improve the hydration rate of na montmorillonite, make its compared with
The liquid with viscosity higher is formed in short time, the diadochy of the permselective property blocking agent insulating liquid is improved, in addition, hydrogen
Sodium oxide molybdena can also clean out organic matter in formation, beneficial to the cementing of blocking agent and stratum；Calgon can be with fast
Speed and the complex in water, enable the duct after processing effectively to reduce concentration of heavy metal ion, avoid in blocking agent
Sudden strain of a muscle that hydraulic material can occur when running into high-valence cationic is solidifying, extra retarded set or produces the kinds of risks such as internal fissure.Above-mentioned group
That divides be combined with each other, and permselective property blocking agent insulating liquid is effectively strengthened the plugging effect of blocking agent, extends closure timeliness.
Meanwhile the application method of permselective property blocking agent insulating liquid of the invention, comprise the following steps：
Step 1, formation pre processing, squeezing prepad fluid, cleaning fluid；
Step 2, after squeezing permselective property blocking agent insulating liquid as described above, squeezing blocking agent；
Step 3, after squeezing permselective property blocking agent insulating liquid as described above, squeezing displacement fluid.
To make the permselective property blocking agent insulating liquid of the present invention aid in blocking agent to play optimal plugging effect, extend closure
Timeliness, permselective property blocking agent is squeezed before blocking agent is squeezed in application method and is pushed open the water in stratum with insulating liquid, is reduced stifled
The degree that agent is diluted with water, improves the cementing power on stratum in advance, and reduces the risk that blocking agent runs into other ions, ensures construction
Safety, and the situation for being also possible to prevent to be difficult to solidify after postorder blocking agent is diluted on stratum using rear remaining alkali occurs, and carries
High shut-off capacity；Permselective property blocking agent insulating liquid is squeezed after squeezing blocking agent again, protection blocking agent solidification, prevents displacement fluid from diluting
Blocking agent causes to solidify incomplete, return slag phenomenon；Permselective property is strengthened with insulating liquid by preposition, rearmounted permselective property blocking agent
The plugging effect of blocking agent.
As the restriction to aforesaid way, the blocking agent is made by the component of following quality proportioning：Add successively in 400 parts of water
Enter 0 ~ 2 part of hydroxycarboxylate, 0 ~ 2 part of nitrite, 15 ~ 30 parts of lithium aluminosilicate, 1 ~ 10 part of propenyl polymer, ultra-fine oil well
10 ~ 20 parts of cement, 80 ~ 100 parts of ultrafine slag, it is well mixed under stirring.
As the restriction to aforesaid way, the ultra-fine oil-well cement mean particle size is 15 μm, the ultrafine slag
Mean particle size is 15 μm.
There is above-mentioned blocking agent selectivity to enter macropore, hypotonic duct in not entering, high temperature resistant, and stability is good etc. excellent
Gesture, it is used cooperatively with the permselective property blocking agent of the present invention with insulating liquid, can be with high selectivity, block macropore to validity
Road, extend closure timeliness, improve drive and adopt rate.
As the restriction to aforesaid way, the prepad fluid is clear water, and cleaning fluid is neopelex, displacement fluid
For clear water.
In summary, it is stifled for coordinating using technical scheme, the permselective property blocking agent insulating liquid of acquisition
It the use of agent, can effectively strengthen the plugging effect of blocking agent, extend closure timeliness；It is forward and backward in squeezing blocking agent in application method
Carry out squeezing permselective property blocking agent to handle stratum with insulating liquid, improve ground environment, reduce blocking agent and be diluted, done
Disturb, be difficult to solidify equivalent risk, ensure construction safety, improve shut-off capacity.
Embodiment
Embodiment one
The present embodiment is related to several groups of permselective property blocking agent insulating liquids, and formula is as shown in the table：
By the formula of upper table, three kinds of materials are sequentially added into water, permselective property blocking agent is produced after being mixed evenly
Use insulating liquid.
Embodiment two
The present embodiment is related to the experiment to the insulating liquid effect of embodiment 1.2.
Prepare before construction：
1. acts flow string, wax removal in well, measure；
2. scraping tubing string under, lower sand-flushing pipe column, clear water sand washing to artificial bottom of a well, circulation well cleanup, reach inlet and outlet water quality one
Cause；
3. plays sand-flushing pipe columns, lower squeezing tubing string, installation well head, packer rises envelope, drags for dead fuse；
4. squeezings equipment transports to well site, equipment installation connection, permselective property blocking agent is prepared by the formula of embodiment 1.2
Use insulating liquid；By sequentially adding hydroxycarboxylic acid sodium 0.5g, natrium nitrosum 2g, lithium aluminosilicate 20g, acrylic amide in 400g water
Copolymer 8g, oil-well cement（15 μm of average grain diameter）10g, slag（15 μm of average grain diameter）90g formula is mixed evenly, and matches somebody with somebody
Blocking agent processed；Using clear water as prepad fluid, neopelex is cleaning fluid, and clear water is that displacement fluid is constructed.
Construction technology：
Step 1, water-tank lorry, pump truck are reached the spot, connection squeezing pipeline, well head and manifold of ground pressure testing 25MP；Stratum is pre-
Processing, try to squeeze clear water 5m3, formation testing absorbability, squeezing prepad fluid, cleaning fluid；
Step 2, after squeezing permselective property blocking agent insulating liquid, blocking agent is squeezed, pressure change is observed, if pressure exceedes
The operation pressure upper limit, stop squeezing, wait pressure diffusion, if occurring operation pressure twice exceedes the operation pressure upper limit, stop squeezing
Note；
Step 3, after squeezing permselective property blocking agent insulating liquid, displacement fluid is squeezed, blocking agent is pushed away into pit shaft；Replace knot
Shu Hou, wait pressure diffusion（1-3h）After bleed off pressure≤30min；Using working rig deblocking packer, upper lifting pipe post 3-5 roots, just wash
Well 2 weeks, to importing and exporting, water quality is identical, and closing well waits solidifying 72h, completion.
Site operation parameter is as follows：
Well depth：353 meters；
Production string：159 millimeters（Lower 349 meters of depth）；
Oil reservoir position：270.4-280.3 rice, 10 meters of thickness；
Permeability：1343 millidarcies；
Porosity：30.4%;
Oil saturation：39.4%；
Oil recovery data are as shown in the table：
It can be drawn by oil recovery data, permselective property blocking agent coordinates the use of blocking agent to significantly improve oil field with insulating liquid
Drive adopt rate, and strengthen plugging effect, blocking agent be used only with insulating liquid compared to without using permselective property blocking agent, during closure
Effect significantly extends, and drive is run slag phenomenon during adopting and reduced, and slag content reduces, beneficial to the processing of crude oil, the corrosive wear to pipeline
Reduce.
Claims (3)
1. a kind of application method of permselective property blocking agent insulating liquid, comprises the following steps：
Step 1, formation pre processing, squeezing prepad fluid, cleaning fluid；
Step 2, squeeze permselective property blocking agent insulating liquid after, squeezing blocking agent, the permselective property blocking agent insulating liquid by
The component of following weight proportion is made：1~5 part of sodium hydroxide, 5~10 parts of na montmorillonite, calgon are added in 100 parts of water
0.05~0.1 part；
Step 3, after squeezing the permselective property blocking agent insulating liquid, squeezing displacement fluid；
The blocking agent is made by the component of following weight proportion：0~2 part of hydroxycarboxylate, nitrous acid are sequentially added in 400 parts of water
0~2 part of salt, 15~30 parts of lithium aluminosilicate, 1~10 part of propenyl polymer, ultra-fine 10~20 parts of oil-well cement, ultrafine slag
80~100 parts, it is well mixed under stirring.
2. the application method of permselective property blocking agent insulating liquid according to claim 1, it is characterised in that：It is described ultra-fine
Oil-well cement mean particle size is 15 μm, and the ultrafine slag mean particle size is 15 μm.
3. the application method of the permselective property blocking agent insulating liquid according to any one of claim 1~2, its feature exist
In：The prepad fluid is clear water, and cleaning fluid is neopelex, and displacement fluid is clear water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510077817.3A CN104694095B (en) | 2015-02-14 | 2015-02-14 | Permselective property blocking agent insulating liquid and its application method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510077817.3A CN104694095B (en) | 2015-02-14 | 2015-02-14 | Permselective property blocking agent insulating liquid and its application method |
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| Publication Number | Publication Date |
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| CN104694095A CN104694095A (en) | 2015-06-10 |
| CN104694095B true CN104694095B (en) | 2018-02-16 |
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| CN109236259A (en) * | 2018-10-31 | 2019-01-18 | 西安科技大学 | A kind of contradictory fracturing process of adjustment water injection well plane water drive |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1635046A (en) * | 2003-12-30 | 2005-07-06 | 湖北汉科新技术股份有限公司 | High density double-acting ahead fluid and method for preparing same |
| CN101747880A (en) * | 2009-12-29 | 2010-06-23 | 中国石油天然气集团公司 | Deep-water low-temperature low-density early-strength cementing slurry for well cementation |
| CN102337108A (en) * | 2011-10-28 | 2012-02-01 | 西南石油大学 | Efficient anti-pollution isolation liquid for well cementation and preparation method thereof |
-
2015
- 2015-02-14 CN CN201510077817.3A patent/CN104694095B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1635046A (en) * | 2003-12-30 | 2005-07-06 | 湖北汉科新技术股份有限公司 | High density double-acting ahead fluid and method for preparing same |
| CN101747880A (en) * | 2009-12-29 | 2010-06-23 | 中国石油天然气集团公司 | Deep-water low-temperature low-density early-strength cementing slurry for well cementation |
| CN102337108A (en) * | 2011-10-28 | 2012-02-01 | 西南石油大学 | Efficient anti-pollution isolation liquid for well cementation and preparation method thereof |
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Address after: 100000 Beijing City, Chaoyang District Beichen Road No. 8 apartment block Q room 1006 Patentee after: Dano (Beijing) Petroleum Technology Service Co., Ltd. Address before: 100000 Beijing City, Chaoyang District Jiuxianqiao Road No. 14 Building 5 layer 508 C Patentee before: Dano (Beijing) Petroleum Technology Service Co., Ltd. |
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