CN108547596A - A kind of oil field gas phase shielding steering cleaning de-plugging process - Google Patents
A kind of oil field gas phase shielding steering cleaning de-plugging process Download PDFInfo
- Publication number
- CN108547596A CN108547596A CN201810303138.7A CN201810303138A CN108547596A CN 108547596 A CN108547596 A CN 108547596A CN 201810303138 A CN201810303138 A CN 201810303138A CN 108547596 A CN108547596 A CN 108547596A
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- China
- Prior art keywords
- agent
- front shield
- oil field
- diversion agent
- cleaning
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Classifications
-
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing, limiting or eliminating the deposition of paraffins or like substances
-
- 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/594—Compositions used in combination with injected gas, e.g. CO2 orcarbonated gas
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
Abstract
The present invention provides a kind of oil field gas phase shielding steering cleaning de-plugging process.The technique is that inert gas is made dispersed phase, liquid does the miscible fluids of decentralized medium formation, as front shield diversion agent, according to flow resistance minimum principle, front shield diversion agent will preferentially enter the smaller high permeability zone of flow resistance or crack, with the continuous entrance of shielding diversion agent, shielding bridge blinding is formed in macropore and crack, ultimately forms effective plugged zone.When construction, postposition main body liquid encounters shielding plugging layer rear steering and enters less permeable layer, be more evenly distributed with it is more efficient, achieve the purpose that turn to unlock less permeable layer, expand and unlock blocked area, improve measure effect.
Description
Technical field
The invention belongs to technical field of oilfield chemistry, and in particular to a kind of oil field gas phase shielding steering cleaning de-plugging work
Skill, the formation blockage of unlocking for high water-cut well in oil field development and the uneven oil-water well of section are administered.
Background technology
The technology key of work-in-progress control is uniform acid distribution in oil field development, can effectively contact non-compared with thick-layer or longitudinal direction
The blocking of homosphere, while production profile can also be restored, but the prior art exists simultaneously following shortcoming and defect：1. diverting agent
Type is various, due to complex formation, brings many difficulties, chemical agent stratum to be incompatible to the selection of diverting agent, reduces temporarily stifled
Efficiency；2. diverting agent in acid solution or water flooding some be difficult to dissolve, thoroughly counter cannot eject, the two of stratum can be caused
Secondary pollution reduces the effect of de-plugging；Since chemical temporary blocking agent plugging strength is limited, in particular for low pressure well and middle and high infiltration layer,
Usage amount is big, and economic cost is high, effect unobvious.
Invention content
Steering cleaning de-plugging process is shielded it is an object of the present invention to provide a kind of oil field gas phase for height in oil field development to contain
The formation blockage of unlocking of well and the uneven oil-water well of section is administered.
The basic principle and core concept of the present invention：It is that inert gas is made into dispersed phase, liquid does decentralized medium formation
Miscible fluids, as front shield diversion agent, according to flow resistance minimum principle, front shield diversion agent will preferentially enter flowing
The smaller high permeability zone of resistance or crack form shielding bridge with the continuous entrance of shielding diversion agent in macropore and crack
It is stifled, ultimately form effective plugged zone.When construction, postposition main body liquid encounters shielding plugging layer rear steering and enters less permeable layer, distribution
Evenly with it is more efficient, achieve the purpose that turn to unlock less permeable layer, expand and unlock blocked area, improve measure effect.
Drain is returned after doing measure using gas dispersed phase simultaneously, pit shaft is made to form temporary negative pressure, is easy to raffinate discharge stratum.The viscous gas of height
The carrying capacity of body dispersed phase is strong, takes ground to conducive to the particle and landwaste for generating reaction, the particulate loading taken out of is common acids
7-10 times.
Based on above-mentioned principle, a kind of oil field gas phase shielding steering cleaning de-plugging process is provided, is included the following steps：
（1）Preceding processing of constructing is carried out at formation blockage position, injects front shield diversion agent；
（2）After front shield diversion agent all flows into, postposition main body liquid is injected；
（3）Closing well reacts 1h, and raffinate is discharged；
It measures by weight percentage, the composition of the front shield diversion agent：Nonionic surfactant：5.0%, stabilizer：
3.0%, mixed phase conditioning agent：3.0%, gas generation agent：20.0%, mixed phase reinforcing agent：3.0%, liquid phase fluid：66.0%；The postposition
Main body liquid forms：Inorganic monoacid 8%~16%, inorganic binary acid 3%~6%, organic acid 3%~6%, organic dibasic acid 3%~
6%, organic protective agent 1.0%~3.0%, organic stabilizer 2.0%~3%, inorganic stabilizers 1.0%~2.5%, organic cleanup additive
0.5%~1.5, organic mutual solvent 2.0%~2.5%, liquid phase fluid 40%~60%.
In above-mentioned technical proposal, step（1）Carry out preceding processing of constructing at formation blockage position, including upper go out production pipe
Column, lower operating tool string, the front shield diversion agent and postposition main body liquid are carried and being injected by tubing string.
In above-mentioned technical proposal, the front shield diversion agent is using inert gas as dispersed phase, by the liquid of said components
Body does the miscible fluids of decentralized medium formation.
In above-mentioned technical proposal, the inert gas is nitrogen.
The spy that currently preferred oil field gas phase shielding turns to cleaning solution agent is further described below by experimental data
Property：
As shown in Figure 1, front shield diversion agent is selective to permeability, de-plugging agent is even into high low-permeability layer（Uniform cloth
Liquid）；Stifled very much not stifled small, i.e., front shield diversion agent has stronger plugging action to high permeability zone, and to the envelope of less permeable layer
Stifled effect is weaker.
As shown in Fig. 2, front shield diversion agent is selective to oil-water-layer, de-plugging agent preferentially enters oil reservoir（Construction peace
Entirely）, front shield diversion agent meet oil disappear mixed phase become liquid phase, meet water stablize, water-blocking layer not block up oil reservoir, front shield diversion agent is to water
Layer has stronger plugging action.
As shown in figure 3, front shield diversion agent has higher apparent viscosity, carrying capacity is strong, and when row of returning can be by solid
Particle and insoluble matter carry out pit shaft, and the suspending power of front shield diversion agent is 10~100 times of water or frozen glue liquid, preposition screen
It is low and facilitate adjusting to cover diversion agent density, pit shaft head of liquid is low, and gas phase expansion energy is the row of returning in front shield diversion agent
Energy is provided, low pressure well and absorption well are suitable for.
Compared with prior art, the present invention having the advantage that：1. a kind of oil field provided by the invention is shielded with gas phase and is turned to
Clean de-plugging process method has selectivity " stifled very much not stifled small " to in-place permeability, and to the selectivity of oil-water-layer, " water blockoff does not block up
Oil " improves temporarily stifled specific aim；2. a kind of oil field provided by the invention gas phase, which shields, turns to cleaning de-plugging process method root
According to the uniform cloth blockages relieving fluids of difference of in-place permeability, prevents chemical temporary blocking agent and stratum and be incompatible problem, improve plugging removal effect；
3. a kind of oil field provided by the invention gas phase, which shields, turns to cleaning de-plugging process method cleaning energization, there are strong carrying capacity, energy
Make the de-plugging raffinate thoroughly row of returning, prevent secondary pollution, achievees the purpose that removal of bridge formation and raffinate are thoroughly counter and arrange.
Description of the drawings
Fig. 1 is the high low-permeability layer permeability curve figure of front shield diversion agent of the present invention；
Fig. 2 is front shield diversion agent oil-water-layer permeability curve figure of the present invention；
Fig. 3 is characterization front shield diversion agent pressue-graph in pit shaft fluid column of the present invention.
Specific implementation mode
Example 1：
The present invention provides a kind of oil field gas phase shielding steering cleaning de-plugging process, includes the following steps：
（1）Preceding processing of constructing is carried out at formation blockage position, injects front shield diversion agent；
（2）After front shield diversion agent all flows into, postposition main body liquid is injected；
（3）Closing well reacts 1h, and raffinate is discharged；
It measures by weight percentage, the composition of the front shield diversion agent：Nonionic surfactant：5.0%, stabilizer：
3.0%, mixed phase conditioning agent：3.0%, gas generation agent：20.0%, mixed phase reinforcing agent：3.0%, liquid phase fluid：66.0%；The postposition
Main body liquid forms：Inorganic monoacid 8%~16%, inorganic binary acid 3%~6%, organic acid 3%~6%, organic dibasic acid 3%~
6%, organic protective agent 1.0%~3.0%, organic stabilizer 2.0%~3%, inorganic stabilizers 1.0%~2.5%, organic cleanup additive
0.5%~1.5, organic mutual solvent 2.0%~2.5%, liquid phase fluid 40%~60%.
In above-mentioned technical proposal, step（1）Carry out preceding processing of constructing at formation blockage position, including upper go out production pipe
Column, lower operating tool string, the front shield diversion agent and postposition main body liquid are carried and being injected by tubing string.
In above-mentioned technical proposal, the front shield diversion agent is using inert gas as dispersed phase, by the liquid of said components
Body does the miscible fluids of decentralized medium formation.
In above-mentioned technical proposal, the inert gas is nitrogen.
XX wells are the oil fields X a bite producing wells, produce long 4+52 1, long 4+52 2, it is long by 61 1-2Layer, long 4+52Layer core intersection
25.5m, perforating degree 45.1%；Long 61 1-2Layer core intersection 13.0m, perforating degree 46.2%, the well x x months are dynamically deteriorated, contain
Water flies up 57.9%, is shielded using above-mentioned gas phase and turns to cleaning de-plugging process method, and after a period of time, statistics effect is：It arranges
Apply 5.14 m of rear liquid measure3, oil-producing 2.08t, aqueous decline 93.8%.
Embodiment 2
XX wells are the oil fields X a bite producing wells, production long 61 1Layer, long 61 1Layer core intersection 29.m, perforating degree 42.2%；Well x
The x months in year are dynamically deteriorated, aqueous to fly up 84.2%, are shielded using above-mentioned gas phase and turn to the de-plugging process method that cleans, for a period of time
Afterwards, statistics effect is：6.14 m of liquid measure after measure3, oil-producing 3.2t, aqueous decline 95.6%.
Claims (4)
1. a kind of oil field gas phase, which shields, turns to cleaning de-plugging process, which is characterized in that include the following steps：
（1）Preceding processing of constructing is carried out at formation blockage position, injects front shield diversion agent；
（2）After front shield diversion agent all flows into, postposition main body liquid is injected；
（3）Closing well reacts 1h, and raffinate is discharged；
It measures by weight percentage, the composition of the front shield diversion agent：Nonionic surfactant：5.0%, stabilizer：
3.0%, mixed phase conditioning agent：3.0%, gas generation agent：20.0%, mixed phase reinforcing agent：3.0%, liquid phase fluid：66.0%；The postposition
Main body liquid forms：Inorganic monoacid 8%~16%, inorganic binary acid 3%~6%, organic acid 3%~6%, organic dibasic acid 3%~
6%, organic protective agent 1.0%~3.0%, organic stabilizer 2.0%~3%, inorganic stabilizers 1.0%~2.5%, organic cleanup additive
0.5%~1.5, organic mutual solvent 2.0%~2.5%, liquid phase fluid 40%~60%.
2. a kind of oil field according to claim 1 gas phase, which shields, turns to cleaning de-plugging process, which is characterized in that the step
Suddenly（1）Carry out preceding processing of constructing at formation blockage position, including upper go out flow string, lower operating tool string, the front shield
Diversion agent and postposition main body liquid are carried and being injected by tubing string.
3. a kind of oil field according to claim 1 gas phase, which shields, turns to cleaning de-plugging process, which is characterized in that before described
Shielding diversion agent is set using inert gas as dispersed phase, the miscible fluids of decentralized medium formation is done by the liquid of said components.
4. a kind of oil field according to claim 1 gas phase, which shields, turns to cleaning de-plugging agent, which is characterized in that the inertia
Gas is nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810303138.7A CN108547596A (en) | 2018-04-07 | 2018-04-07 | A kind of oil field gas phase shielding steering cleaning de-plugging process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810303138.7A CN108547596A (en) | 2018-04-07 | 2018-04-07 | A kind of oil field gas phase shielding steering cleaning de-plugging process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108547596A true CN108547596A (en) | 2018-09-18 |
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ID=63513983
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810303138.7A Pending CN108547596A (en) | 2018-04-07 | 2018-04-07 | A kind of oil field gas phase shielding steering cleaning de-plugging process |
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Citations (7)
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|---|---|---|---|---|
| US20070173413A1 (en) * | 2006-01-25 | 2007-07-26 | Clearwater International, Llc | Non-volatile phosphorus hydrocarbon gelling agent |
| CN101126314A (en) * | 2007-09-12 | 2008-02-20 | 中国石油大学(华东) | Foam plug flow diverting acidification technique |
| CN104152126A (en) * | 2014-07-24 | 2014-11-19 | 中国石油天然气股份有限公司 | Foam profile control system suitable for advanced profile control of oilfield and preparation method of foam profile control system |
| CN104963672A (en) * | 2015-07-13 | 2015-10-07 | 中国石油大学(北京) | Reservoir stratum transformation method for cleaning steering material blocking shot hole temporarily to form fracture net |
| CN105647496A (en) * | 2016-01-30 | 2016-06-08 | 张向南 | Expandable biopolymer temporary plug profile control agent and preparation method thereof |
| CN106917619A (en) * | 2017-03-21 | 2017-07-04 | 中国石油天然气股份有限公司 | The temporary stall of slit formation carbonate reservoir to fracture support integration remodeling method |
| CN206722815U (en) * | 2017-04-11 | 2017-12-08 | 北京东晟世纪科技有限公司 | A kind of nitrogen foam distributary acid de-plugging system that offshore oilfield oil-water well is provided |
-
2018
- 2018-04-07 CN CN201810303138.7A patent/CN108547596A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070173413A1 (en) * | 2006-01-25 | 2007-07-26 | Clearwater International, Llc | Non-volatile phosphorus hydrocarbon gelling agent |
| CN101126314A (en) * | 2007-09-12 | 2008-02-20 | 中国石油大学(华东) | Foam plug flow diverting acidification technique |
| CN104152126A (en) * | 2014-07-24 | 2014-11-19 | 中国石油天然气股份有限公司 | Foam profile control system suitable for advanced profile control of oilfield and preparation method of foam profile control system |
| CN104963672A (en) * | 2015-07-13 | 2015-10-07 | 中国石油大学(北京) | Reservoir stratum transformation method for cleaning steering material blocking shot hole temporarily to form fracture net |
| CN105647496A (en) * | 2016-01-30 | 2016-06-08 | 张向南 | Expandable biopolymer temporary plug profile control agent and preparation method thereof |
| CN106917619A (en) * | 2017-03-21 | 2017-07-04 | 中国石油天然气股份有限公司 | The temporary stall of slit formation carbonate reservoir to fracture support integration remodeling method |
| CN206722815U (en) * | 2017-04-11 | 2017-12-08 | 北京东晟世纪科技有限公司 | A kind of nitrogen foam distributary acid de-plugging system that offshore oilfield oil-water well is provided |
Non-Patent Citations (2)
| Title |
|---|
| 李道轩: "《薄互层低渗透油藏开发技术》", 31 August 2007 * |
| 赵化廷: "《文、卫、马断块油田开发技术论文集》", 30 April 2001 * |
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Application publication date: 20180918 |