CN104694095A - Spacer fluid for penetrating selective plugging agent and application method of spacer fluid - Google Patents
Spacer fluid for penetrating selective plugging agent and application method of spacer fluid Download PDFInfo
- Publication number
- CN104694095A CN104694095A CN201510077817.3A CN201510077817A CN104694095A CN 104694095 A CN104694095 A CN 104694095A CN 201510077817 A CN201510077817 A CN 201510077817A CN 104694095 A CN104694095 A CN 104694095A
- Authority
- CN
- China
- Prior art keywords
- blocking agent
- spacer pad
- parts
- permselective property
- spacer fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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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
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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
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- 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
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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
Abstract
The invention relates to a spacer fluid for a penetrating selective plugging agent. The spacer fluid is prepared from the following components in parts by weight: 1-5 parts of sodium hydroxide, 5-10 parts of sodium montmorillonite, 0.05-0.1 part of sodium hexametaphosphate and 100 parts of water. The spacer fluid for the penetrating selective plugging agent is used together with a plugging agent, so that the plugging effect of the plugging agent can be effectively enhanced; and the plugging ageing is prolonged. According to the application method, operation of the spacer fluid for the penetrating selective plugging agent is carried out before and after the plugging agent is squeezed; stratum is treated; the stratum environment is improved; the risks that the plugging agent is diluted and interfered, and is difficult to solidify are reduced; the construction safety is ensured; and the plugging capacity is improved.
Description
Technical field
The present invention relates to a kind of spacer pad, particularly relate to a kind of permselective property blocking agent spacer pad, meanwhile, the invention still further relates to the using method of this permselective property blocking agent spacer pad.
Background technology
Domestic most oil field has all entered into waterflooding mode and has exploited, long-term waterflooding, again due to the nonuniformity of oil reservoir, difference in oil, water viscosity and the imbalance in profit well group, must cause injecting that water is charged into along high permeable strip, channelling is to recovery well, and it is low to involve degree to low permeability layer, cause the cycle efficiency injecting water low.People seek to adopt various technology and means to improve tar productivity always, wherein oilwell water shutoff, Profile Control in Injection Well are widely used as the effective technique means of one, but normally used blocking agent often exists by duct liquid diluting in stratum, reduce solidifiability, plugging effect is poor; The problems such as displacement process easily runs slag, affects post-treatment operations, damage equipment, and shutoff timeliness is short.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides a kind of permselective property blocking agent spacer pad improving plugging effect.
For achieving the above object, permselective property blocking agent spacer pad of the present invention, is obtained by the component of following weight proportion: add 1 ~ 5 part, sodium hydroxide in 100 parts of water, na montmorillonite 5 ~ 10 parts, Sodium hexametaphosphate 99 0.05 ~ 0.1 part.
In the component of permselective property blocking agent spacer pad, na montmorillonite is used in conjunction with high-valence cationic a certain amount of in duct, stratum, the problem that the blocking agent shutoff setting time avoiding these ions to cause shortens, after na montmorillonite aquation, there is certain solid phase and viscosity simultaneously, this permselective property blocking agent spacer pad is made to have possessed certain rate of permeation selectivity, can not non-selectivity enter all stratum, simultaneously because solid load is more much lower than blocking agent in spacer pad, relatively low permeable strata will be entered, provide early-stage preparations for blocking agent plays a role; Sodium hydroxide is for improving the hydration rate of na montmorillonite, make form the liquid with viscosity higher its within a short period of time, improve the replacing power of this permselective property blocking agent spacer pad, in addition, organism in formation can also be cleaned out by sodium hydroxide, is beneficial to the cementing of blocking agent and stratum; Sodium hexametaphosphate 99 can complex rapidly and in water, make the duct after process effectively can reduce concentration of heavy metal ion, the sudden strain of a muscle that can occur when avoiding the hydraulic material in blocking agent to run into high-valence cationic be solidifying, extra retarded set or produce the kinds of risks such as internal fissure.Be combineding with each other of said components, enables permselective property blocking agent spacer pad effectively strengthen the plugging effect of blocking agent, extends shutoff timeliness.
Meanwhile, the using method of permselective property blocking agent spacer pad of the present invention, comprises the following steps:
Step one, formation pre processing, squeezing spearhead, scavenging solution;
Step 2, after squeezing permselective property blocking agent spacer pad as above, squeezes blocking agent;
Step 3, after squeezing permselective property blocking agent spacer pad as above, squeezes displacing liquid.
Blocking agent is assisted to play best plugging effect for making permselective property blocking agent spacer pad of the present invention, extend shutoff timeliness, before squeezing blocking agent, squeeze permselective property blocking agent spacer pad in using method the water in stratum is pushed open, reduce blocking agent by water-reducible degree, improve the cementing power on stratum in advance, and reduce the risk that blocking agent runs into other ion, ensure construction safety, and after using, remaining alkali also can prevent postorder blocking agent from being occurred by the situation being difficult to solidify after diluting on stratum, improves shut-off capacity; Squeeze permselective property blocking agent spacer pad again after squeezing blocking agent, the solidification of protection blocking agent, blocking agent causes solidifying not exclusively, return slag phenomenon to prevent displacing liquid from diluting; By the plugging effect of preposition, rearmounted permselective property blocking agent spacer pad strengthening permselective property blocking agent.
As the restriction to aforesaid way, described blocking agent is obtained by the component of following quality proportioning: add hydroxycarboxylate 0 ~ 2 part in 400 parts of water successively, nitrite 0 ~ 2 part, lithium aluminosilicate 15 ~ 30 parts, propenyl polymer 1 ~ 10 part, ultra-fine oil well cement 10 ~ 20 parts, ultrafine slag 80 ~ 100 parts, mixes under whipped state.
As the restriction to aforesaid way, described ultra-fine oil well cement mean particle size is 15 μm, and described ultrafine slag mean particle size is 15 μm.
Above-mentioned blocking agent has selectivity and enters macropore, and in not entering, hypotonic duct, high temperature resistant, the advantages such as good stability, with permselective property blocking agent spacer pad of the present invention carry out with the use of, can highly selective, validity ground macropore plugging, extend shutoff timeliness, improve and drive the rate of adopting.
As the restriction to aforesaid way, described spearhead is clear water, and scavenging solution is Sodium dodecylbenzene sulfonate, and displacing liquid is clear water.
In sum, adopt technical scheme of the present invention, the permselective property blocking agent spacer pad of acquisition, for coordinating the use of blocking agent, effectively can strengthen the plugging effect of blocking agent, extends shutoff timeliness; Process in squeezing blocking agent forward and backward squeezing permselective property blocking agent spacer pad formation of all carrying out in using method, improve ground environment, reduce blocking agent diluted, disturbed, be difficult to solidify equivalent risk, ensure construction safety, raising shut-off capacity.
Embodiment
Embodiment one
The present embodiment relates to several groups of permselective property blocking agent spacer pads, fills a prescription as shown in the table:
By the formula of upper table, Xiang Shuizhong adds three kinds of materials successively, namely obtains permselective property blocking agent spacer pad after mixing and stirring.
Embodiment two
The present embodiment relates to the test of the spacer pad effect to embodiment 1.2.
Prepare before construction:
1.. trip out flow string in well, wax removal, measure;
2.. lower scraping tubing string, lower sand-flushing pipe column, clear water sand washing is to artificial bottom of a well, and circulation well cleanup, reaches import and export water quality consistent;
3.. play sand-flushing pipe column, lower squeezing tubing string, install well head, pkr rises envelope, drags for dead fuse;
4.. squeezing equipment transports to well site, and equipment installation connects, by the formulated permselective property blocking agent spacer pad of embodiment 1.2; By the formula mixing and stirring adding hydroxycarboxylic acid sodium 0.5g, Sodium Nitrite 2g, lithium aluminosilicate 20g, acrylamido copolymer 8g, oil well cement (median size 15 μm) 10g, slag (median size 15 μm) 90g in 400g water successively, preparation blocking agent; Take clear water as spearhead, Sodium dodecylbenzene sulfonate is scavenging solution, and clear water is that displacing liquid is constructed.
Construction technology:
Step one, water tanker, pump truck are reached the spot, and connect squeezing pipeline, well head and manifold of ground pressure testing 25MP; Formation pre processing, clear water 5m is squeezed in examination
3, formation testing receptivity, squeezing spearhead, scavenging solution;
Step 2, after squeezing permselective property blocking agent spacer pad, squeezing blocking agent, observes pressure change, if pressure exceedes the operation pressure upper limit, stop squeezing, wait for pressure diffusion, if occur for twice, operation pressure exceedes the operation pressure upper limit, stops squeezing;
Step 3, after squeezing permselective property blocking agent spacer pad, squeezing displacing liquid, pushes away pit shaft by blocking agent; After replacement terminates, after waiting for pressure diffusion (1-3h), bleed off pressure≤30min; Use working rig deblocking packer, upper lifting pipe post 3-5 root, positive well-flushing 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;
Sand string: 159 millimeters (lower dark 349 meters);
Oil reservoir position: 270.4-280.3 rice, thickness 10 meters;
Rate of permeation: 1343 millidarcies;
Porosity: 30.4%;
Oil saturation: 39.4%;
Oil recovery data are as shown in the table:
Can be drawn by oil recovery data, what permselective property blocking agent spacer pad coordinated the use of blocking agent to significantly improve oil field drives the rate of adopting, and enhancing plugging effect, only blocking agent is used compared to not using permselective property blocking agent spacer pad, shutoff timeliness significant prolongation, drive in the process of adopting and run the minimizing of slag phenomenon, slag content reduces, be beneficial to former oil handling, the corrosive wear of pipeline is reduced.
Claims (5)
1. a permselective property blocking agent spacer pad, is characterized in that, is obtained by the component of following weight proportion: add 1 ~ 5 part, sodium hydroxide in 100 parts of water, na montmorillonite 5 ~ 10 parts, Sodium hexametaphosphate 99 0.05 ~ 0.1 part.
2. a using method for permselective property blocking agent spacer pad, comprises the following steps:
Step one, formation pre processing, squeezing spearhead, scavenging solution;
Step 2, after squeezing permselective property blocking agent spacer pad as claimed in claim 1, squeezes blocking agent;
Step 3, after squeezing permselective property blocking agent spacer pad as claimed in claim 1, squeezes displacing liquid.
3. the using method of permselective property blocking agent spacer pad according to claim 2, it is characterized in that, described blocking agent is obtained by the component of following weight proportion: add hydroxycarboxylate 0 ~ 2 part in 400 parts of water successively, nitrite 0 ~ 2 part, lithium aluminosilicate 15 ~ 30 parts, propenyl polymer 1 ~ 10 part, ultra-fine oil well cement 10 ~ 20 parts, ultrafine slag 80 ~ 100 parts, mixes under whipped state.
4. the using method of permselective property blocking agent spacer pad according to claim 3, is characterized in that: described ultra-fine oil well cement mean particle size is 15 μm, and described ultrafine slag mean particle size is 15 μm.
5. the using method of the permselective property blocking agent spacer pad according to any one of claim 2 ~ 4, is characterized in that: described spearhead is clear water, and scavenging solution is Sodium dodecylbenzene sulfonate, and displacing liquid 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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104694095A true CN104694095A (en) | 2015-06-10 |
| CN104694095B CN104694095B (en) | 2018-02-16 |
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| CN201510077817.3A Active CN104694095B (en) | 2015-02-14 | 2015-02-14 | Permselective property blocking agent insulating liquid and its application method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN104694095B (en) | 2018-02-16 |
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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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