CN104629701A - Annulus protective liquid of annulus mechanical seat sealed oil-gas well and applications thereof - Google Patents
Annulus protective liquid of annulus mechanical seat sealed oil-gas well and applications thereof Download PDFInfo
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- CN104629701A CN104629701A CN201310551922.7A CN201310551922A CN104629701A CN 104629701 A CN104629701 A CN 104629701A CN 201310551922 A CN201310551922 A CN 201310551922A CN 104629701 A CN104629701 A CN 104629701A
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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
- C09K8/54—Compositions for in situ inhibition of corrosion in boreholes or wells
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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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/02—Equipment or details not covered by groups E21B15/00 - E21B40/00 in situ inhibition of corrosion in boreholes or wells
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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
- C09K2208/32—Anticorrosion additives
Abstract
The invention relates to an annulus protective liquid of annulus mechanical seat sealed oil-gas well and applications thereof. The protective liquid is composed of the following components in percentage by weight: 10 to 14% of emulsifier, 0.1 to 0.5% of foaming agent, 0.1 to 0.3% of foam stabilizer, 25 to 28% of oil phase, 0.5 to 1.0% of corrosion inhibitor, and the balance being water. The emulsifier, foaming agent, foam stabilizer and corrosion inhibitor are mixed, then water and oil phase are added to prepare stable emulsion; then gas with a stable chemical property is introduced into the emulsion to form stable foamed emulsion; and the stable foamed emulsion is injected into an oil sleeve annulus and is automatically separated into layers of gas, oil, and water under the effects of the temperature and pressure in the cylindrical well and the surface tensions of different components. The provided annulus protective liquid can protect the oil sleeve annulus, has a good corrosion inhibiting speed, does not generate an upward force on the wellhead, and can prevent the aging of the packer. Furthermore, the cost of annulus protective liquid is reduced.
Description
Technical field
The present invention relates to a kind of annular protective liquid of oil recovery gas well and water injection well, particularly the annular protective liquid of the setting Oil/gas Well of a kind of annular mechanical and application thereof.
Background technology
In domestic and international oilfield exploitation procedure, for protective casing inwall and oil-pipe external wall are from H
2s and CO
2deng corrosion, the main method adopting tubing and casing annular space to inject efficient protection liquid.When Oil/gas Well finishing drilling, annular protective liquid is injected into above casing annulus pkr, fills up oil jacket annular space, and by oil jacket annular space and production fluid isolation.
The fluid of annular protective liquid generally based on water or oil base hydrocarbon.Its concrete function can be used to provide stable equilibrium pressure to inside and outside Oil/gas Well sleeve pipe, and play heat conductivity heat-insulating effect effectively at annular space to the fluid in oil pipe; The integrity of tubing string and guarantee pit shaft can be protected; Protection liquid formed hydrostaticpressure can reduce pkr operting differential pressure, the pressure on balance stratum, thus reducing effect is in the pressure difference of down-hole sealing member or cap rock, prevents decompression and damage in pit shaft.
Annular protective liquid conventional at present has water base annular protective liquid and oil base annulus protection fluid.Water base annular protective liquid, primarily of composite formation such as clear water, inhibiter and sterilant, scale inhibitor etc., according to the pressure condition on stratum, can control its density at 1.00-1.6kg/L, mainly be applicable to the Oil/gas Well of bottom temperature in 150 DEG C.Oil base annulus protection fluid is primarily of white oil, gas oil equistability hydrocarbon composition, and its conventional density can at 0.9-1.8kg/L, more more stable than aqueous based systems performance under the higher temperature environment more than 150 DEG C.
Research and apply (" Xi'an Petroleum University's journal (the natural science edition) " VOL27.No4 in 2012 of the long-acting annular protective liquid that the people such as the Zeng Hao of China carry out around general light height sulfur Gas Fields; and a kind of Lab-evaluation (" Drilling and completion fluids " VOL7.No2 in 2010 being applicable to Oil & gas field in sulfur annular protective liquid of doing of the people such as Zheng Yi P87-90); P37-P49) in the basic components thinking of the water base annular protective liquid of routine, sulfur elimination and formate weighting agent, pH adjusting agent etc. is added, to adapt to protect the Safety Injection of liquid and requirement steady in a long-term.
The foam protection liquid formula of Chinese invention patent application numbers 200410060240.7 and technique; it is primarily of water glass, sodium alkyl benzene sulfonate, polyvinyl alcohol and the composition such as chemical cleaner, salt; after extemporaneous preparation to predetermined viscosity and density; mix-froth liquid is pumped in the stratum of well, plays the effect ensureing safe operation construction.To hydrocarbon zone Low Damage, the stability in stratum ensures 14 days.
The foam protection liquid formula of Chinese invention patent application numbers 200410060240.7 and technique; it is primarily of water glass, sodium alkyl benzene sulfonate, polyvinyl alcohol and the composition such as chemical cleaner, salt; after extemporaneous preparation to predetermined viscosity and density; mix-froth liquid is pumped in the stratum of well, plays the effect ensureing safe operation construction.To hydrocarbon zone Low Damage, the stability in stratum ensures 14 days.
A kind of annular protective liquid for water injection well of Chinese invention patent application numbers 200910238207.1 and application thereof, its aqueous solution be mainly made up of amine compound, composite phosphate, compound quaternary ammonium salt cats product and sulphite etc.For anticorrosion, antiscale and the sterilization of oil field note clear water or produced-water reinjection well tubing and casing.
In United States Patent (USP) U.S.Pat.No.5.607.901 annular protective liquid, the human hair such as Toups Jr. understands environmentally acceptable annular protective liquid.And have thixotropic transformation liquid composition environment-friendly type and free from corrosion nonaqueous phase continuous fluid.This mixture comprises polar organic solvent, hydrophilic clay and water-free liquid, and system is at construction forward slip value.This patent major concern and solve the insulation problem of pit shaft, to the harm of personnel and environment when not considering well head treatment and discharge.
The annular protective liquid that United States Patent (USP) U.S.Pat.No.7,219735B2 provide, it contains sanitas, sterilant, desalination and scale remover, and prevents pit shaft top from freezing and heat-insulating cap rock fluid.The additive of annular protective liquid selects additive that can be water-soluble especially, and not miscible with cap rock fluid, thus moves to cap rock fluid, contaminate environment after preventing interpolation.
The domestic and international existing patent of comprehensive analysis and the related article delivered, in conjunction with under Oil/gas Well and the setting condition of water injection well annular space, the main problem of existing annular protective liquid can be divided into two large classes:
1, when Oil/gas Well adopts water base annular protective liquid, there is following problem: when (1) winter temperature is lower, the easy frozen block of water fluid of well head part, well head steel at low temperatures fragility become large, may affect the stability of well head set-up.(2) annular protective liquid adds and fills annular space and base sealed packer; after closing head valve; be subject under closing well state formation temperature pressure conduction or under the state of driving a well; under the heat transfer effect of oil pipe inner fluid flowing; annular protective liquid generation volumetric expansion in airtight annular space causes in annular space and builds the pressure; well head is produced and pushes up power, human at periodic intervals must open valve relieving pressure.(3) when carry out well head release annular protective liquid time, need specific container and follow-up liquid treatment, there is certain safety and environmental protection hidden danger.(4) general containing the dissolved gas such as aerobic, carbonic acid gas in water base protection liquid, large to the corrosion control difficulty of carbon steel oil pipe, sleeve pipe.Even if add inhibiter and Scale inhibitors, sterilant in water base, under long-term oxygen-free environment, also can grow the corrosion bacterias such as sulphate reducing bacteria (SRB), iron bacteria, cause oil jacket annular space stagnation water quality deterioration.But because its cost is low relative to oil base annulus protection fluid, generally adopt so domestic.
2, during Oil/gas Well employing oil base annulus protection fluid, there is following problem: (1) packing element soaks in oil base easily aging, damaged for a long time.(2) its main component white oil, diesel oil.Cost is higher, and a bite well oil base protection liquid cost just reaches 30 ~ 500,000 yuan/mouthful.(3) after adding and filling annular space liquid, the annular protective liquid volumetric expansion also also existed in airtight annular space builds the pressure, to top on well head with need the problems such as regular relieving pressure.
Summary of the invention
The object of this invention is to provide a kind of have good workability, can cost-saving, the annular protective liquid and the construction technology thereof that ensure the setting Oil/gas Well of annular mechanical of annular space long-term high corrosion mitigating effect.
The annular protective liquid of the setting Oil/gas Well of annular mechanical of the present invention, by percentage to the quality, it consists of: emulsifying agent 10 ~ 14%, pore forming material 0.1 ~ 0.5%, suds-stabilizing agent 0.1 ~ 0.3%, oil phase 25 ~ 28%, inhibiter 0.5 ~ 1%, all the other are water.
Present invention also offers a kind of construction technology utilizing the setting Oil/gas Well of described annular protective liquid annular mechanical, comprise the steps:
1) by percentage to the quality, first add in Agitation Tank the emulsifying agent of 10 ~ 14%, the pore forming material of 0.1 ~ 0.5%, the suds-stabilizing agent of 0.1 ~ 0.3% and 0.5 ~ 1% inhibiter; Then under whipped state, add the oil phase of water and 25 ~ 28% in turn, form stable emulsion; Pass into the stable chemical nature gas that volume percent is 8 ~ 10% again, Keep agitation, form stable foam emulsion;
2) described stable foam emulsion is passed into oil jacket annular space by the normal circulation between oil pipe and sleeve pipe or reacting cycle; Enter the stable foam emulsion of oil jacket annular space, under the surface tension effects of the temperature of wellbore environment, pressure and different components, carry out the AUTOMATIC ZONING of gas, oil, water.
Further, after described foam emulsion liquid AUTOMATIC ZONING, in annular space overall volume, upper gaseous phase accounts for 8 ~ 10%, and middle part oil base accounts for 40 ~ 60%, and bottom is water base accounts for 20 ~ 50%.
Further, when described foam emulsion liquid AUTOMATIC ZONING is not thorough, the layering conditioning agent that mass percent is 0.1 ~ 0.2% can be added.
Various additive composition and source
Described emulsifying agent is low interfacial tension tensio-active agent; Described pore forming material is nonionic surface active agent; Described inhibiter is water base quaternary ammonium salt inhibiter; Described suds-stabilizing agent is the vegetable jelly class that can play thickening or reinforced foam intensity, comprises xanthan gum, guanidine glue, fenugreek gum, partially hydrolyzed polyacrylamide HPAM, Natvosol HEC or carboxyl methyl cellulose; Described oil phase is white oil, organic silicone oil or gas oil.
Preferably, described emulsifying agent is polyoxyethylene sorbitol trioleate Span85, oxygen ethene sorbitol monooleate Span-80 or oxygen ethene Sorbitol Powder three hard oil acid esters Span65; Described pore forming material is polyoxyethylated alkyl alcohol or alkylphenol polyoxyethylene;
Described inhibiter is alkynoxide methyl quaternary ammonium salt, its headformulae is R-NR "-(CHOR ')
2● " be alkyl, aryl or cycloalkyl, X is the elements such as S or P for X, wherein R, R.Molecular-weight average 800-1500.
Further, described annular protective liquid also comprises the stable chemical nature gas that volume percent is 8 ~ 10%, comprises nitrogen or helium.
Further, described annular protective liquid also comprises the layering conditioning agent for nonionic polyoxyalkylene that mass percent is 0.1 ~ 0.2%.
Further, described layering conditioning agent is polyoxyethylene polyoxypropylene ether, cyclic alkyl resol-polyoxyethylene polyoxypropylene ether, polyphenylmethyl silicone oil-polyoxyethylene polyoxypropylene ether, phenol-amine resin ether or hydrazine olefin oxide polyethers.
Beneficial effect:
1, this annular protective liquid enters in annulus wellbore, can layering in proportion automatically under the condition such as surface tension of temperature in wellbore, pressure and component, and technique is simple, good stability.
2, this annular protective liquid passes into after in annulus wellbore and automatically can be divided into gas, oil, three layers, water, and upper gaseous phase degree of compressibility is large, can not produce top power and pressure release convenience, also do not affect by winter low temperature well head; Middle part oil base available protecting oil pipe outside surface and internal surface of casing prevent it from corroding; The water base oil base that separates in bottom prevents packing element aging.
3, according to component proportion described in this annular protective liquid, the content of the white oil of use, organic silicone oil or gas oil is relatively low, and the cost of the annular protective liquid therefore prepared is lower, is about 1/3rd of full oil base annulus protection fluid cost.
Accompanying drawing explanation
A kind of annular protective liquid that Fig. 1 provides for the embodiment of the present invention is for the working drawing of the setting Oil/gas Well of annular mechanical.
The another kind of annular protective liquid that Fig. 2 provides for the embodiment of the present invention is for the working drawing of the setting Oil/gas Well of annular mechanical
Fig. 3 to have constructed rear annular protective liquid AUTOMATIC ZONING structural representation for annular protective liquid that the embodiment of the present invention provides.
Embodiment
The annular protective liquid of the setting Oil/gas Well of a kind of annular mechanical provided by the invention, by percentage to the quality, its composition comprises: emulsifying agent 10 ~ 14%, pore forming material 0.1 ~ 0.5%, suds-stabilizing agent 0.1 ~ 0.3%, oil phase 25 ~ 28%, inhibiter 0.5 ~ 1%, all the other are clear water; Wherein, emulsifying agent is low interfacial tension tensio-active agent, preferred polyoxyethylene sorbitol trioleate Span85, oxygen ethene sorbitol monooleate Span-80 or oxygen ethene Sorbitol Powder three hard oil acid esters Span65; Pore forming material is nonionic surface active agent, preferred polyoxyethylated alkyl alcohol or alkylphenol polyoxyethylene; Described suds-stabilizing agent is the vegetable jelly class that can play thickening or reinforced foam intensity, comprises xanthan gum, guanidine glue, fenugreek gum, partially hydrolyzed polyacrylamide HPAM, Natvosol HEC or carboxyl methyl cellulose; Oil phase is white oil, organic silicone oil or gas oil; Inhibiter is water base quaternary ammonium salt inhibiter, preferred alkynoxide methyl quaternary ammonium salt.
Wherein, annular protective liquid also comprises the stable chemical nature gas that volume percent is 8 ~ 10%, as nitrogen, helium or other stable chemical nature gas.
Wherein, annular protective liquid also comprises the layering conditioning agent for nonionic polyoxyalkylene that mass percent is 0.1 ~ 0.2%.
Annular protective liquid provided by the invention is applied to the construction technology of the setting Oil/gas Well of annular mechanical, comprises the steps:
1) by percentage to the quality, first add in Agitation Tank the emulsifying agent of 10 ~ 14%, the pore forming material of 0.1 ~ 0.5%, the suds-stabilizing agent of 0.1 ~ 0.3% and 0.5 ~ 1% inhibiter; Then under whipped state, add the oil phase of water and 25 ~ 28% in turn, form stable emulsion; Pass into the stable chemical nature gas that volume percent is 8 ~ 10% again, Keep agitation, form stable foam emulsion;
2) described stable foam emulsion is passed into oil jacket annular space by the normal circulation between oil pipe and sleeve pipe or reacting cycle; Enter the stable foam emulsion of oil jacket annular space, under the surface tension effects of the temperature of wellbore environment, pressure and different components, the AUTOMATIC ZONING of gas, oil, water is carried out in the time range of setting, in annular space overall volume, upper gaseous phase accounts for 8 ~ 10%, middle part oil base accounts for 40 ~ 60%, and bottom is water base accounts for 20 ~ 50%.
If when foam emulsion liquid AUTOMATIC ZONING is not thorough, need add the layering conditioning agent that mass percent is 0.1 ~ 0.2%, layering conditioning agent is polyoxyethylene polyoxypropylene ether, cyclic alkyl resol-polyoxyethylene polyoxypropylene ether, polyphenylmethyl silicone oil-polyoxyethylene polyoxypropylene ether, phenol-amine resin ether or hydrazine olefin oxide polyethers.
Embodiment 1
Be in the Agitation Tank of 10L at a capacity, by percentage to the quality, order adds emulsifying agent oxygen ethene sorbitol monooleate span-80(Jiangsu Hai'an Petrochemical Plant of 10%), the high temperature resistant pore forming material polyoxyethylated alkyl alcohol (Jiangsu Hai'an Petrochemical Plant) of salt tolerant of 0.5%, suds-stabilizing agent vegetable jelly heteroglycan KD-03(Yangzhou Runda Oilfield Chemicals Co., Ltd. of 0.3%), layering conditioning agent polyoxyethylene polyoxypropylene ether (Jiangsu Hai'an Petrochemical Plant) of 0.1%, the 26# industrial grade white oil (Shanghai Bei Te Chemical Co., Ltd.) of 28%, the inhibiter alkynoxide methyl quaternary ammonium salt IMC-80BH(Shenyang Zhong Kemingyang corrosion and protection company limited of 0.5%), all the other are water, the dosing of 3000rpm Keep agitation, pass into the nitrogen that volume percent is 8-10% again, 3000rpm rotating speed Keep agitation 30min, form the uniform foam milk sap of phase.At foam milk sap being placed in room temperature 25 DEG C, by stability test, result shows its steady time of >72hr.
Table 1 annular protective liquid composition
See Fig. 1, prepare liquid, Keep agitation dosing with dosing pump truck 7 from dosing mouth 8 according to formula at Agitation Tank 6, form foam milk sap, phase evenly (not stratified).Annular space between cleaning tubing 3 and sleeve pipe 1, then by setting for pkr 2.Annular protective liquid is injected with fluid injection pump truck 5 to oil jacket annular space after completing.After stablizing 8 hours, gas, oil, water layering in proportion from top to bottom, as shown in Figure 3, annular protective liquid from top to bottom successively AUTOMATIC ZONING be upper gaseous phase 11, middle part oil base 12 and bottom water base 13.
Embodiment 2
By percentage to the quality, by component formula dosing: emulsifying agent oxygen ethene Sorbitol Powder three hard oil acid esters span65(Jiangsu Hai'an Petrochemical Plant of 14%), the nonionogenic tenside pore forming material alkylphenol polyoxyethylene (Jiangsu Hai'an Petrochemical Plant) of 0.1%, the happy Qinghua factory in suds-stabilizing agent polyacrylamide HPAM(Henan of 0.1%), layering conditioning agent phenol-amine resin ether (Jiangsu Hai'an Petrochemical Plant) of 0.2%, the 26# industrial grade white oil (Shanghai Bei Te Chemical Co., Ltd.) of 25%, the inhibiter alkynoxide methyl quaternary ammonium salt (Shenyang Zhong Kemingyang corrosion and protection company limited) of 0.1%, all the other are water.
Table 2 annular protective liquid composition
See Fig. 1, prepare liquid, Keep agitation dosing with dosing pump truck 7 from dosing mouth 8 according to formula at Agitation Tank 6, form foam milk sap, phase evenly (not stratified).Annular space between cleaning tubing 3 and sleeve pipe 1, then by setting for pkr 2.Annular protective liquid is injected with fluid injection pump truck 5 to oil jacket annular space after completing.After stablizing 8 hours, gas, oil, water layering in proportion from top to bottom, as shown in Figure 3, annular protective liquid from top to bottom successively AUTOMATIC ZONING be upper gaseous phase 11, middle part oil base 12 and bottom water base 13.
Embodiment 3
By percentage to the quality, by component formula dosing: 12% polyoxyethylene sorbitol trioleate Span85(Jiangsu Hai'an Petrochemical Plant), 0.5% pore forming material polyoxyethylated alkyl alcohol (Jiangsu Hai'an Petrochemical Plant), 0.2% sodium carboxymethyl-cellulose CMC suds-stabilizing agent (Yangzhou Runda Oilfield Chemicals Co., Ltd.), 0.2% layering conditioning agent diamine olefin oxide polyethers (Jiangsu Hai'an Petrochemical Plant), the commercially available gas oil of 25%, 0.8% inhibiter alkynoxide methyl quaternary ammonium salt (Shenyang Zhong Kemingyang corrosion and protection company limited), all the other are water.
Table 3 annular protective liquid composition
See Fig. 2, prepare liquid, Keep agitation dosing with dosing pump truck 7 from dosing mouth 8 according to formula at Agitation Tank 6, form foam milk sap, pass into stable chemical nature gas, phase is even.Circulation well cleanup, the annular space first between cleaning tubing 3 and sleeve pipe 1, then by setting for pkr 2.Fall into ball seat 9 from the pitching of well head 4 oil pipe and block oil pipe, now opening side leads to sliding sleeve 10.Annular protective liquid is injected with fluid injection pump truck 5 to oil jacket annular space after completing.Close side and lead to sliding sleeve 10, wait question response to complete.After stablizing 8 hours, gas, oil, water layering in proportion from top to bottom, as shown in Figure 3, annular protective liquid from top to bottom successively AUTOMATIC ZONING be upper gaseous phase 11, middle part oil base 12 and bottom water base 13.
The annular protective liquid of the setting Oil/gas Well of a kind of annular mechanical provided by the invention, pass into after in annulus wellbore and automatically can be divided into gas, oil, three layers, water, upper gaseous phase degree of compressibility is large, can not produce top power and pressure release convenience, also do not affect by winter temperature well head; Middle part oil base available protecting oil pipe outside surface and internal surface of casing, can reduce the corrodibility to annular space steel oil, sleeve pipe; The water base oil base that separates in bottom prevents packing element aging.
Claims (10)
1. an annular protective liquid for the setting Oil/gas Well of annular mechanical, is characterized in that: by quality 100%, it consists of: emulsifying agent 10 ~ 14%, pore forming material 0.1 ~ 0.5%, suds-stabilizing agent 0.1 ~ 0.3%, oil phase 25 ~ 28%, inhibiter 0.5 ~ 1.0%, all the other are water.
2. the annular protective liquid of the setting Oil/gas Well of a kind of annular mechanical according to claim 1, is characterized in that: described emulsifying agent is polyoxyethylene sorbitol trioleate Span85, oxygen ethene sorbitol monooleate Span-80 or oxygen ethene Sorbitol Powder three hard oil acid esters Span65.
3. the annular protective liquid of the setting Oil/gas Well of a kind of annular mechanical according to claim 1, is characterized in that: described pore forming material is nonionic surface active agent, polyoxyethylated alkyl alcohol or alkylphenol polyoxyethylene.
4. the annular protective liquid of the setting Oil/gas Well of a kind of annular mechanical according to claim 1; it is characterized in that: described suds-stabilizing agent is the vegetable jelly class that can play thickening or reinforced foam intensity, select xanthan gum, guanidine glue, fenugreek gum, partially hydrolyzed polyacrylamide HPAM, Natvosol HEC or carboxyl methyl cellulose.
5. the annular protective liquid of the setting Oil/gas Well of a kind of annular mechanical according to claim 1, is characterized in that: described oil phase is white oil, organic silicone oil or gas oil.
6. the annular protective liquid of the setting Oil/gas Well of a kind of annular mechanical according to claim 1, is characterized in that: described inhibiter is water miscible inhibiter, selects fatty acid amide, modified imidazoline salt or longer chain fatty acid or alkynoxide methyl quaternary ammonium salt.
7. the annular protective liquid of the setting Oil/gas Well of a kind of annular mechanical according to claim 1, is characterized in that: described layering conditioning agent is polyoxyethylene polyoxypropylene ether, cyclic alkyl resol-polyoxyethylene polyoxypropylene ether, polyphenylmethyl silicone oil-polyoxyethylene polyoxypropylene ether, phenol-amine resin ether or hydrazine olefin oxide polyethers.
8. an application for the annular protective liquid of the setting Oil/gas Well of annular mechanical according to claim 1, is characterized in that:
1) first in Agitation Tank, emulsifying agent, pore forming material, suds-stabilizing agent and inhibiter is added; Then under whipped state, add water and oil phase, form stable emulsion; Pass into the stable chemical nature gas that stable emulsion volume percent is 8 ~ 10% again, Keep agitation, form stable foam emulsion;
2) stable foam emulsion is passed into oil jacket annular space by the normal circulation between oil pipe and sleeve pipe or reacting cycle; Enter the stable foam emulsion of oil jacket annular space, under the surface tension effects of wellbore environment temperature, pressure and different components, carry out the AUTOMATIC ZONING of gas, oil, water, or add 0.1 ~ 0.2% layering conditioning agent.
9. the application of the annular protective liquid of the setting Oil/gas Well of a kind of annular mechanical according to claim 8, is characterized in that: described stable chemical nature gas, comprises nitrogen or helium.
10. the application of the annular protective liquid of the setting Oil/gas Well of a kind of annular mechanical according to claim 8; it is characterized in that: after described foam emulsion liquid AUTOMATIC ZONING, in annular space overall volume, upper gaseous phase accounts for 8 ~ 10%; middle part oil base accounts for 40 ~ 60%, and bottom is water base accounts for 20 ~ 50%.
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| CN105255572B (en) * | 2015-11-10 | 2018-05-01 | 中石化石油工程技术服务有限公司 | A kind of coiled tubing metal drag reducer |
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| CN107557788A (en) * | 2016-06-30 | 2018-01-09 | 中国石油天然气股份有限公司 | A kind of anti-corrosion method of packer completion gas well oil jacket annular space |
| CN107806333A (en) * | 2017-10-10 | 2018-03-16 | 中国石油天然气股份有限公司 | Protect the method for implanting and device of liquid |
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| CN108468533B (en) * | 2018-03-29 | 2020-02-07 | 西南石油大学 | Oil-based annular protection liquid injection process |
| CN111721615A (en) * | 2020-07-10 | 2020-09-29 | 中国石油天然气集团有限公司 | Device and method for evaluating stress corrosion cracking sensitivity of pipe in oil casing annular pollution environment |
| CN111721615B (en) * | 2020-07-10 | 2023-04-07 | 中国石油天然气集团有限公司 | Device and method for evaluating stress corrosion cracking sensitivity of pipe in oil casing annular pollution environment |
| CN115012878A (en) * | 2022-06-30 | 2022-09-06 | 西南石油大学 | Double-layer pipe-based inhibitor filling system for sulfur-containing gas well without production stop |
| CN115012878B (en) * | 2022-06-30 | 2023-06-23 | 西南石油大学 | Sulfur-containing gas well non-stop inhibitor filling system based on double-layer pipe |
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