CN103256032A - Method for enhancing water injecting capacity of hypotonic oil field by utilizing nano-powder material - Google Patents
Method for enhancing water injecting capacity of hypotonic oil field by utilizing nano-powder material Download PDFInfo
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- CN103256032A CN103256032A CN2013102112878A CN201310211287A CN103256032A CN 103256032 A CN103256032 A CN 103256032A CN 2013102112878 A CN2013102112878 A CN 2013102112878A CN 201310211287 A CN201310211287 A CN 201310211287A CN 103256032 A CN103256032 A CN 103256032A
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Abstract
The invention relates to a method for enhancing the water injecting capacity of a hypotonic oil filed by utilizing a nano-powder material. A turbid liquid injection increasing agent with the concentration of 2 percent is prepared by nano-powder and an oil-soluble solvent and injected into an injection increasing segment stopper of the nano-powder material from a water injection well pipe pillar, the injection increasing agent of 5 cubic meters is injected in an oil layer of every meter by thickness, a pump is stopped and a well is closed for 72 hours, isometric inverted discharged liquid is injected in well opening production and then water is injected. According to the method for enhancing the water injecting capacity of the hypotonic oil field by utilizing the nano-powder material, the selective and moistening nano-powder material is injected to the hypotonic oil layer, by absorption of the surfaces of rock hole gaps with the material, the properties of the surfaces of the rock hole gaps are changed, therefore, aqueous phase permeability is improved, improvement of the water injection capacity of a hypotonic oil reservoir is achieved, and the problem of difficulty in water injection of the hypotonic oil layer is solved.
Description
[technical field]
The present invention relates to a kind of oil-field flooding technology, be specifically related to a kind of method of utilizing nano-powder material to strengthen the low-permeability oilfield water injection capacity, belong to the oil field development technical field.
[background technology]
Along with the continuous increase of the whole world to the oil and natural gas demand, the petroleum resources that is stored in the middle and high permeable reservoir strata can not satisfy the demands fully.In recent years, in the oil-gas reservoir that China is verified, ratio shared in the low permeability reservoirs is up to 60-70%.Because the seepage channel size of low-permeability oil gas reservoir is little, the percolation law complexity, the exploitation difficulty is hidden big more than conventional gas and oil, and recovery ratio is low.
At present, the waterflooding extraction mode is the topmost development scheme of low permeability oil field, but on the one hand because the intrinsic hyposmosis feature of such reservoir; The change of reservoir fluid character and injection water quality are to the destruction of reservoir on the other hand, cause that the near wellbore zone is seriously polluted, in-place permeability descends, oil well output reduces, the well injection rate reduces or annotate not enter, degradation problem under the stratum energy, have a strong impact on the oil field ultimate recovery.Pressure break and acidifying are the well stimulations of using always, but formation fracturing can cause serious non-homogeneity, even cause " water breakthrough " phenomenon between injection-production well, reduce waterflood sweep efficiency, and the acidifying measure also can cause environment pollution and etching problem.
The participation seepage flow of nanometer grade powder material (0.1-100 nanometer) in porous media has very special phenomena.Because electronic structure and the crystal structure of nano-material surface change, and have produced particularity such as skin effect, small-size effect, quantum effect, thereby have made it present special performances at aspects such as magnetic, catalysis, chemism, adsorptivities.Just because of the nanoparticle form material has special effect and performance, making this material be used for improving the oil-field flooding ability becomes possibility.
Therefore, for solving the problems of the technologies described above, necessaryly provide a kind of new method of utilizing nano-powder material to strengthen the low-permeability oilfield water injection capacity, to overcome described defective of the prior art.
[summary of the invention]
For addressing the above problem, the object of the present invention is to provide a kind of method of utilizing nano-powder material to strengthen the low-permeability oilfield water injection capacity, it realizes improving the purpose of water injection capacity by changing the character of reservoir rocks pore surface.
For achieving the above object, the technical scheme that the present invention takes is: a kind of method of utilizing nano-powder material to strengthen the low-permeability oilfield water injection capacity, and it comprises following processing step:
1), inorganic agent dispensing containers, injection pump, inorganic agent injection valve, tee piece, injection-production column jacket, anti-pump, tubing string dispenser, shaft bottom dispenser, pressure meter, Water filling valve and the flow meter arranged are installed;
2), inorganic agent valve closing during normal water filling, Water filling valve is opened, and injects water through behind tee piece, injection-production column jacket and the perforation, enters the water filling layer, record well head water injection pressure and flow;
3), close Water filling valve, open inorganic agent and inject valve, open injection pump, inject 5 cubic metres the injection agent that is dissolved with nano-powder material according to every rice bran oil layer thickness;
4), close the inorganic agent valve, vexed well 72 hours guarantees that nano-powder material in the absorption of blowhole surface, changes blowhole Surface Physical character;
5), open inorganic agent and inject valve, open anti-row's pump, anti-discharge opeing flows into injection-production column jacket from the rock stratum hole, by anti-row's pump anti-discharge opeing is extracted in the inorganic agent container;
6), treat that anti-discharge opeing all is discharged in the inorganic agent container after, close inorganic agent and inject valve and anti-row's pump, open Water filling valve, begin normal water filling, record well head water injection pressure and flow.
The method of utilizing nano-powder material to strengthen the low-permeability oilfield water injection capacity of the present invention further is: in the described step 1), ground is extended on described injection-production column jacket top, and the water filling layer is inserted in the bottom, and extends to the shaft bottom; Described inorganic agent dispensing containers, injection pump, inorganic agent injection valve, tee piece, injection-production column jacket connect successively; Described tubing string dispenser is contained in the injection-production column jacket, and the anti-pump of arranging is installed in the tubing string dispenser; Described shaft bottom dispenser is positioned at the bottom of injection-production column jacket; Tube wall in described injection-production column jacket is provided with perforation; Described pressure meter, Water filling valve and flow meter are installed on the tee piece respectively.
The method of utilizing nano-powder material to strengthen the low-permeability oilfield water injection capacity of the present invention further is set to: the concentration that described injection agent is made into by nano-powder and oil-dissolving solvent is 2% suspension injection agent.
The method of utilizing nano-powder material to strengthen the low-permeability oilfield water injection capacity of the present invention further is set to: becoming of described oil-dissolving solvent is C
9-C
13N-alkane, isoparaffin, cycloalkane and aromatic hydrocarbon, the weight percent hundred of each composition is 51.4%, 25.2%, 10.1%, 13.3%.
The method of utilizing nano-powder material to strengthen the low-permeability oilfield water injection capacity of the present invention further is set to: described nano-powder material is the silicon dioxide nano powder material.
Compared with prior art, the present invention has following beneficial effect: the method for utilizing nano-powder material to strengthen the low-permeability oilfield water injection capacity of the present invention is injected selective wetting type nano-powder material in Middle-Low Permeability Reservoirs, change the character on blowhole surface in the absorption of blowhole surface by this material, thereby raising water phase permeability, realize improving the LOW PERMEABILITY RESERVOIR water injection capacity, solve Middle-Low Permeability Reservoirs water filling difficult problem.
[description of drawings]
Fig. 1 is the state diagram of method when water filling that utilizes nano-powder material to strengthen the low-permeability oilfield water injection capacity of the present invention.
Fig. 2 is the state diagram of method when annotating injection agent that utilizes nano-powder material to strengthen the low-permeability oilfield water injection capacity of the present invention.
Fig. 3 is the state diagram of method when vexed well that utilizes nano-powder material to strengthen the low-permeability oilfield water injection capacity of the present invention.
Fig. 4 is the state diagram of method when anti-row that utilizes nano-powder material to strengthen the low-permeability oilfield water injection capacity of the present invention.
[specific embodiment]
See also Figure of description 1 to shown in the accompanying drawing 4, the present invention is a kind of method of utilizing nano-powder material to strengthen the low-permeability oilfield water injection capacity, and it comprises following processing step:
1), inorganic agent dispensing containers 1, injection pump 2, inorganic agent injection valve 3, tee piece 4, injection-production column jacket 5, anti-pump 6, tubing string dispenser 7, shaft bottom dispenser 9, pressure meter 11, Water filling valve 12 and the flow meter 13 arranged are installed; Wherein, ground is extended on described injection-production column jacket 5 tops, and water filling layer 14 is inserted in the bottom, and extends to shaft bottom 10; Described inorganic agent dispensing containers 1, injection pump 2, inorganic agent injection valve 3, tee piece 4, injection-production column jacket 5 connect successively; Described tubing string dispenser 7 is contained in the injection-production column jacket 5, and the anti-pump 6 of arranging is installed in the tubing string dispenser 7; Described shaft bottom dispenser 9 is positioned at the bottom of injection-production column jacket 5; Tube wall in described injection-production column jacket 5 is provided with perforation 8; Described pressure meter 11, Water filling valve 12 and flow meter 13 are installed in respectively on the tee piece 4.
2), shown in Figure of description 1, inorganic agent valve 3 is closed during normal water filling, and Water filling valve 12 is opened, and injects water through behind tee piece 4, injection-production column jacket 5 and the perforation 8, enters water filling layer 14, water injection pressure and the flow of record well head pressure table 11, flow meter 13;
3), shown in Figure of description 2, close Water filling valve 12, open inorganic agent and inject valve 3, open injection pump 2, inject 5 cubic metres the injection agent that is dissolved with nano-powder material according to every rice bran oil layer thickness; Wherein, the concentration that is made into by nano-powder and oil-dissolving solvent of described injection agent is 2% suspension injection agent; Becoming of described oil-dissolving solvent is C
9-C
13N-alkane, isoparaffin, cycloalkane and aromatic hydrocarbon, the weight percent hundred of each composition is 51.4%, 25.2%, 10.1%, 13.3%; Described nano-powder material is the silicon dioxide nano powder material.
4), shown in Figure of description 3, close the inorganic agent valve, vexed well 72 hours guarantees that nano-powder material in the absorption of blowhole surface, changes blowhole Surface Physical character;
5), shown in Figure of description 4, open inorganic agent and inject valve 3, open anti-row's pump 6, anti-discharge opeing flows into injection-production column jacket 5 from the rock stratum hole by perforation 8, by anti-row's pump 6 anti-discharge opeing is extracted in the inorganic agent container 1;
6), treat that anti-discharge opeing all is discharged in the inorganic agent container 1 after, close inorganic agent and inject valve 3 and anti-row's pump 6, open Water filling valve 3, begin normal water filling, record well head water injection pressure and flow.
The above specific embodiment only is the preferred embodiment of this creation, not in order to limiting this creation, all in this creation spirit and principle within make any modification, be equal to replacement, improvement etc., all should be included within the protection domain of this creation.
Claims (5)
1. method of utilizing nano-powder material to strengthen the low-permeability oilfield water injection capacity is characterized in that: comprise following processing step:
1), inorganic agent dispensing containers, injection pump, inorganic agent injection valve, tee piece, injection-production column jacket, anti-pump, tubing string dispenser, shaft bottom dispenser, pressure meter, Water filling valve and the flow meter arranged are installed;
2), inorganic agent valve closing during normal water filling, Water filling valve is opened, and injects water through behind tee piece, injection-production column jacket and the perforation, enters the water filling layer, record well head water injection pressure and flow;
3), close Water filling valve, open inorganic agent and inject valve, open injection pump, inject 5 cubic metres the injection agent that is dissolved with nano-powder material according to every rice bran oil layer thickness;
4), close the inorganic agent valve, vexed well 72 hours guarantees that nano-powder material in the absorption of blowhole surface, changes blowhole Surface Physical character;
5), open inorganic agent and inject valve, open anti-row's pump, anti-discharge opeing flows into injection-production column jacket from the rock stratum hole, by anti-row's pump anti-discharge opeing is extracted in the inorganic agent container;
6), treat that anti-discharge opeing all is discharged in the inorganic agent container after, close inorganic agent and inject valve and anti-row's pump, open Water filling valve, begin normal water filling, record well head water injection pressure and flow.
2. the method for utilizing nano-powder material to strengthen the low-permeability oilfield water injection capacity as claimed in claim 1, it is characterized in that: in the described step 1), ground is extended on described injection-production column jacket top, and the water filling layer is inserted in the bottom, and extends to the shaft bottom; Described inorganic agent dispensing containers, injection pump, inorganic agent injection valve, tee piece, injection-production column jacket connect successively; Described tubing string dispenser is contained in the injection-production column jacket, and the anti-pump of arranging is installed in the tubing string dispenser; Described shaft bottom dispenser is positioned at the bottom of injection-production column jacket; Tube wall in described injection-production column jacket is provided with perforation; Described pressure meter, Water filling valve and flow meter are installed on the tee piece respectively.
3. the method for utilizing nano-powder material to strengthen the low-permeability oilfield water injection capacity as claimed in claim 1, it is characterized in that: the concentration that described injection agent is made into by nano-powder and oil-dissolving solvent is 2% suspension injection agent.
4. the method for utilizing nano-powder material to strengthen the low-permeability oilfield water injection capacity as claimed in claim 3, it is characterized in that: becoming of described oil-dissolving solvent is C
9-C
13N-alkane, isoparaffin, cycloalkane and aromatic hydrocarbon, the weight percent hundred of each composition is 51.4%, 25.2%, 10.1%, 13.3%.
5. the method for utilizing nano-powder material to strengthen the low-permeability oilfield water injection capacity as claimed in claim 4, it is characterized in that: described nano-powder material is the silicon dioxide nano powder material.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105733543A (en) * | 2016-04-21 | 2016-07-06 | 中国石油大学(华东) | Water lock removal agent for low-water-content oil well |
| CN106872235A (en) * | 2017-03-30 | 2017-06-20 | 中国石油大学(北京) | The nanometer CT test samples preparation facilities and preparation method of rock |
| CN109488267A (en) * | 2017-09-12 | 2019-03-19 | 中国石油天然气股份有限公司 | Recovery system and collecting method |
| CN109996930A (en) * | 2016-09-02 | 2019-07-09 | Vi-能源有限责任公司 | The method of processing well bottom chronostratigraphic zone |
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| CA2271168A1 (en) * | 1996-11-07 | 1998-05-14 | Baker Hughes Limited | Fluid separation and reinjection systems for oil wells |
| CN2752436Y (en) * | 2004-12-29 | 2006-01-18 | 大庆油田装备制造集团 | Moving water injection station |
| CN101735787A (en) * | 2009-12-22 | 2010-06-16 | 上海大学 | Nano material-based water-based oil field injection agent and preparation method thereof |
| WO2012026827A1 (en) * | 2010-08-25 | 2012-03-01 | Seabox As | Water treatment installation, method and use for removal, under water, of at least one undesirable component from water |
| CN102519995A (en) * | 2011-12-15 | 2012-06-27 | 上海大学 | Method for rapidly evaluating effect of reducing resistance of water flow in petroleum reservoir stratum micro-channel by adopting nanoparticle adsorption method |
| CN202578589U (en) * | 2012-06-12 | 2012-12-05 | 中国石油天然气股份有限公司 | Multifunctional string capable of washing well, logging and layering profile control flooding |
| CN103089209A (en) * | 2011-11-08 | 2013-05-08 | 张洲 | Single-pipe multi-well water distribution system |
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Patent Citations (8)
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| WO1995023909A1 (en) * | 1994-03-04 | 1995-09-08 | Valery Petrovich Dyblenko | Method of exploiting an oil-bearing seam |
| CA2271168A1 (en) * | 1996-11-07 | 1998-05-14 | Baker Hughes Limited | Fluid separation and reinjection systems for oil wells |
| CN2752436Y (en) * | 2004-12-29 | 2006-01-18 | 大庆油田装备制造集团 | Moving water injection station |
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| WO2012026827A1 (en) * | 2010-08-25 | 2012-03-01 | Seabox As | Water treatment installation, method and use for removal, under water, of at least one undesirable component from water |
| CN103089209A (en) * | 2011-11-08 | 2013-05-08 | 张洲 | Single-pipe multi-well water distribution system |
| CN102519995A (en) * | 2011-12-15 | 2012-06-27 | 上海大学 | Method for rapidly evaluating effect of reducing resistance of water flow in petroleum reservoir stratum micro-channel by adopting nanoparticle adsorption method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105733543A (en) * | 2016-04-21 | 2016-07-06 | 中国石油大学(华东) | Water lock removal agent for low-water-content oil well |
| CN105733543B (en) * | 2016-04-21 | 2018-08-31 | 中国石油大学(华东) | A kind of Xie Shui for low aqueous well locks agent |
| CN109996930A (en) * | 2016-09-02 | 2019-07-09 | Vi-能源有限责任公司 | The method of processing well bottom chronostratigraphic zone |
| CN109996930B (en) * | 2016-09-02 | 2021-12-21 | Vi-能源有限责任公司 | Method of treating a downhole formation zone |
| CN106872235A (en) * | 2017-03-30 | 2017-06-20 | 中国石油大学(北京) | The nanometer CT test samples preparation facilities and preparation method of rock |
| CN109488267A (en) * | 2017-09-12 | 2019-03-19 | 中国石油天然气股份有限公司 | Recovery system and collecting method |
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Application publication date: 20130821 |
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