CN106967396A - A kind of low thermal conductivity heat-insulating test fluid and its production and use - Google Patents
A kind of low thermal conductivity heat-insulating test fluid and its production and use Download PDFInfo
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- CN106967396A CN106967396A CN201710089689.3A CN201710089689A CN106967396A CN 106967396 A CN106967396 A CN 106967396A CN 201710089689 A CN201710089689 A CN 201710089689A CN 106967396 A CN106967396 A CN 106967396A
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- 239000012530 fluid Substances 0.000 title claims abstract description 87
- 238000012360 testing method Methods 0.000 title claims abstract description 58
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000005260 corrosion Methods 0.000 claims abstract description 29
- 230000007797 corrosion Effects 0.000 claims abstract description 29
- 239000003112 inhibitor Substances 0.000 claims abstract description 20
- 239000000654 additive Substances 0.000 claims abstract description 19
- 230000000996 additive effect Effects 0.000 claims abstract description 18
- 238000002161 passivation Methods 0.000 claims abstract description 18
- 229940123973 Oxygen scavenger Drugs 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims abstract description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 10
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 9
- 239000001110 calcium chloride Substances 0.000 claims description 9
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 9
- WGEFECGEFUFIQW-UHFFFAOYSA-L calcium dibromide Chemical compound [Ca+2].[Br-].[Br-] WGEFECGEFUFIQW-UHFFFAOYSA-L 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 6
- 229910001622 calcium bromide Inorganic materials 0.000 claims description 5
- 230000005764 inhibitory process Effects 0.000 claims description 5
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 4
- 159000000007 calcium salts Chemical class 0.000 claims description 3
- FJLUATLTXUNBOT-UHFFFAOYSA-N 1-Hexadecylamine Chemical compound CCCCCCCCCCCCCCCCN FJLUATLTXUNBOT-UHFFFAOYSA-N 0.000 claims description 2
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical compound CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- ZZTCCAPMZLDHFM-UHFFFAOYSA-N ammonium thioglycolate Chemical compound [NH4+].[O-]C(=O)CS ZZTCCAPMZLDHFM-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 235000011187 glycerol Nutrition 0.000 claims description 2
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 claims description 2
- 229920000768 polyamine Polymers 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- OSNIIMCBVLBNGS-UHFFFAOYSA-N 1-(1,3-benzodioxol-5-yl)-2-(dimethylamino)propan-1-one Chemical group CN(C)C(C)C(=O)C1=CC=C2OCOC2=C1 OSNIIMCBVLBNGS-UHFFFAOYSA-N 0.000 claims 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 238000009413 insulation Methods 0.000 abstract description 7
- 230000002421 anti-septic effect Effects 0.000 abstract description 4
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000013505 freshwater Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000002002 slurry Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 235000012216 bentonite Nutrition 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- ULWHHBHJGPPBCO-UHFFFAOYSA-N propane-1,1-diol Chemical class CCC(O)O ULWHHBHJGPPBCO-UHFFFAOYSA-N 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005185 salting out Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
Classifications
-
- 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
- C09K8/40—Spacer compositions, e.g. compositions used to separate well-drilling from cementing masses
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B33/12—Packers; Plugs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/001—Survey of boreholes or wells for underwater installation
-
- 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
- C09K2208/22—Hydrates inhibition by using well treatment fluids containing inhibitors of hydrate formers
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
A kind of low thermal conductivity heat-insulating test fluid and its production and use, the test fluid includes water, low heat conduction base fluid, high temperature resistance oxygen scavenger, film inhibitor, passivation corrosion inhibiter and heavy weight additive, wherein, the low heat conduction base fluid is binary or ternary Organic Alcohol that can be miscible with water, its molecular weight≤100, thermal conductivity factor≤0.3W/mK.Methods described includes adding water, low heat conduction base fluid, high temperature resistance oxygen scavenger, film inhibitor, passivation corrosion inhibiter and heavy weight additive, stirring mixing.The low thermal conductivity heat-insulating test fluid of the application can be used as heat-insulated test fluid or heat-insulated packer fluids in the deep well, ultra-deep well of bottom hole temperature (BHT)≤175 DEG C, with relatively low thermal conductivity factor, good effect of heat insulation, anti-swollen performance, antiseptic property and gas hydrate rejection, and Applicable temperature and density range covering are wide.
Description
Technical field
The application relates to, but are not limited to oil and gas well testing technical field, is more particularly without limitation, to a kind of low thermal conductivity heat-insulating and surveys
Test solution and its production and use.
Background technology
With deep water, the exploration of ultra-deep well and the continuous increase of drilling operation amount, subsequent job person is to test fluid technology
Demand can become increasing.Compared with land and shallow sea well, in the test process of deep water and ultra-deep-water Oil/gas Well, in stratum
High-pressure oil gas flow from bottom to top by marine riser can cause heat scatter and disappear, making the temperature of fluid in whole pit shaft reduce, appearance
Easily occurs the risk that gas hydrate was saltoutd and formed to low temperature.Document " deep water Solid Free water-based insulation packer fluids technology " is disclosed
A kind of heat-insulated packer fluids of Solid Free deep water, the system is biological big using reagents of the polyalcohol C4 as reduction system thermal conductivity factor
Molecule is used as rheology control agent, density 0.9-1.2g/cm3, resisting temperature is up to 100 DEG C, and system has that thermal conductivity factor is low, heat-insulated effect
The features such as really good, long-term thermal stability is good.Patent application CN104898179A discloses the complexing water that a kind of non-inorganic salts are aggravated
Base deep water test fluid system, the test fluid contains the polyfunctional group small-molecular-weight organic alcohols that can be bonded with hydrone comprising a kind of
Compound, system has preferable rheological characteristic, anti-water sensitivity, Waterproof lock, stronger anti-corrosive properties and compatibility.
Although packer fluids thermal conductivity factor disclosed above is relatively low and then has reached effect of heat insulation, density and Applicable temperature
Scope is narrower, therefore the limitation of field application is very big；Another deep water test fluid is aggravated from non-inorganic salts, cost
Height, configuration process is more complicated, is unfavorable for operation, while the effect of heat insulation of system is poor, in actual applications in the presence of very big office
It is sex-limited, harsh deep well particularly is required to effect of heat insulation, is less suitable for application.
The content of the invention
The following is the general introduction of the theme to being described in detail herein.This general introduction is not to limit the protection model of claim
Enclose.
This application provides water base hot heat-insulated test fluid of one kind and its production and use, the water base heat-insulated test of heat
It is low that the Applicable temperature and density range of liquid cover wide, thermal conductivity factor.
Specifically, this application provides a kind of heat-insulated test fluid of low heat conduction heat, the test fluid includes water, low heat conduction base
Liquid, high temperature resistance oxygen scavenger and film inhibitor, wherein, the low heat conduction base fluid is that energy binary miscible with water or ternary are organic
Alcohol, its molecular weight≤100, thermal conductivity factor≤0.3W/mK.
In presently filed embodiment, counted using the addition sum of water and low heat conduction base fluid as 100mL, the water plus
It can be 40-50mL to enter amount, and the addition of the low heat conduction base fluid can be 50-60mL, the addition of the high temperature resistance oxygen scavenger
Amount can be 0.5-0.8g, and the addition of the film inhibitor can be 0.2-0.5g.
In presently filed embodiment, the low thermal conductivity heat-insulating test fluid can also include passivation corrosion inhibiter, with water and
The addition sum of low heat conduction base fluid is counted for 100mL, and the addition of the passivation corrosion inhibiter can be 2-5mL.Film inhibitor
All it is corrosion inhibiter commonly used in the art with passivation corrosion inhibiter, wherein, film inhibitor is that one layer of protection is formed in metal surface
Film, plays a part of preventing steel disc surface corrosion, passivation corrosion inhibiter mainly forms passivation region in system, reduces various ions
Corrosion to steel.
In presently filed embodiment, the low thermal conductivity heat-insulating test fluid can also include heavy weight additive, with water and low lead
The addition sum of hot radical liquid is counted for 100mL, and the addition of the heavy weight additive can be 10-120g.
In presently filed embodiment, the water can be fresh water.
In presently filed embodiment, the low heat conduction base fluid can be selected from one in ethylene glycol, propane diols, glycerine
Plant or a variety of.
In presently filed embodiment, temperature resistance ability >=120 DEG C of the high temperature resistance oxygen scavenger.
Alternatively, one or more of the high temperature resistance oxygen scavenger in DMKO, reducible sulfur hydrochlorate.
In presently filed embodiment, the film inhibitor can be the compound of the alkyl polyamine that carbon number is 16-20
Thing.
Alternatively, the film inhibitor is the compound of hexadecyl amine and octadecylamine.
In presently filed embodiment, it is 3-5 that the passivation corrosion inhibiter, which can include weight ratio,：3.5-4：1.5-2.8
Imidazoline, ammonium mercaptoacetate and borate.
In presently filed embodiment, the heavy weight additive can be inorganic calcium salt heavy weight additive.
Alternatively, the heavy weight additive is calcium chloride and/or calcium bromide.
Present invention also provides a kind of method for preparing low thermal conductivity heat-insulating test fluid as described above, methods described includes：
Counted using the addition sum of water and low heat conduction base fluid as 100mL, add 40-50mL water, the low heat conduction base fluids of 50-60mL, 0.5-
0.8g high temperature resistances oxygen scavenger, 0.2-0.5g film inhibitors, alternatively, add 2-5mL passivation corrosion inhibiter and/or 10-120g adds
Heavy prescription, stirring mixing, obtains the low thermal conductivity heat-insulating test fluid.
Used present invention also provides low thermal conductivity heat-insulating test fluid as described above in the Oil/gas Well of bottom hole temperature (BHT)≤175 DEG C
Make the purposes of heat-insulated test fluid or heat-insulated packer fluids.
Alternatively, the Oil/gas Well is more than 1500m ultra-deep well for the depth of water 500-1500m deep well or the depth of water.
The heat-insulated test fluid of low heat conduction heat of the application has following advantage：
(1) it is that viscosity at low ambient temperatures is relatively low, and pumping is good without native phase system；
(2) thermal conductivity factor is less than 0.35W/mK, with good effect of heat insulation；
(3) by organic inhibitor (low heat conduction base fluid) and inorganic inhibitor (inorganic calcium salt heavy weight additive) synergy significantly
Enhance the inhibition of system, system anti-dilative >=90%；
(4) antiseptic property is excellent, and particularly the antiseptic effect under high temperature is preferable：Corrosion rate at 120~150 DEG C is
0.004mm/a, the corrosion rate at 160 DEG C is at corrosion rate at 0.0245mm/a, 170 DEG C is 0.0342mm/a, 175 DEG C
Corrosion rate be 0.0382mm/a, significantly lower than professional standard 0.076mm/a；
(5) gas hydrate will not be formed under gas hydrate strong inhibition capability, cryogenic conditions；
(6) salting-out phenomenon will not occur at -30 DEG C；
(7) being applied to mud line, nearby temperature is more than 2 DEG C, deep well, the ultra-deep water well operation of bottom hole temperature (BHT)≤175 DEG C；
(8) density is in≤1.6g/cm3In the range of it is adjustable.
Other features and advantage will be illustrated in the following description, also, partly be become from specification
Obtain it is clear that or being understood by implementing the application.The purpose of the application and other advantages can be by specification, rights
Specifically noted structure is realized and obtained in claim and accompanying drawing.
Brief description of the drawings
Accompanying drawing is used for providing further understanding technical scheme, and constitutes a part for specification, with this
The embodiment of application is used for the technical scheme for explaining the application together, does not constitute the limitation to technical scheme.
Fig. 1 is the N80 steel discs after the low thermal conductivity heat-insulating test fluid prepared through the embodiment of the present application 4 corrodes 72h at 175 DEG C
Outside drawing.
Temperature, pressure during the low thermal conductivity heat-insulating test fluid formation hydrate that Fig. 2 is prepared for the embodiment of the present application 4
Versus time curve.
Embodiment
For the purpose, technical scheme and advantage of the application are more clearly understood, below in conjunction with accompanying drawing to the application
Embodiment be described in detail.It should be noted that in the case where not conflicting, in the embodiment and embodiment in the application
Feature can mutually be combined.
Low heat conduction base fluid used in following examples is ethylene glycol；Low heat conduction base fluid, high temperature resistance oxygen scavenger (PF-
HBSJ-0), film inhibitor (PF-HBSJ-1), passivation corrosion inhibiter (PF-HBSJ-2) and heavy weight additive are purchased from Tianjin CNOOC clothes
Chemical Co., Ltd..
Embodiment 1
Using calcium chloride as heavy weight additive, configuration density is 1.3g/cm3Low thermal conductivity heat-insulating test fluid：Measured respectively with graduated cylinder
Take the low heat conduction base fluid of 160mL fresh water, 240mL to be placed in slurry cup, sequentially added while stirring under 10,000r/min rotating speed
2.4g high temperature resistances oxygen scavenger, 0.95g film inhibitors, 9.5mL passivation corrosion inhibiter, high-speed stirred 20min add 200g chlorinations
Calcium, high-speed stirred 40min.
Embodiment 2
Using calcium bromide as heavy weight additive, configuration density is 1.4g/cm3Low thermal conductivity heat-insulating test fluid：Measured respectively with graduated cylinder
Take the low heat conduction base fluid of 160mL fresh water, 240mL to be placed in slurry cup, sequentially added while stirring under 10,000r/min rotating speed
2.2g high temperature resistances oxygen scavenger, 0.9g film inhibitors, 9mL passivation corrosion inhibiter, high-speed stirred 20min adds 200g calcium bromides, high
Speed stirring 40min.
Embodiment 3
It is simultaneously heavy weight additive that calcium chloride and calcium bromide, which are made, and configuration density is 1.5g/cm3Low thermal conductivity heat-insulating test fluid：
Measure the low heat conduction base fluid of 160mL fresh water, 240mL respectively with graduated cylinder to be placed in slurry cup, stirred below in 10,000r/min rotating speed
While sequentially adding 2.4g high temperature resistances oxygen scavenger, 1.0g film inhibitors, 14.7mL passivation corrosion inhibiter, high-speed stirred 20min is added
180g calcium chloride, high-speed stirred 20min is added and 160g calcium bromides, high-speed stirred 40min.
Embodiment 4
It is simultaneously heavy weight additive that calcium chloride and calcium bromide, which are made, and configuration density is 1.6g/cm3Low thermal conductivity heat-insulating test fluid：
Measure the low heat conduction base fluid of 160mL fresh water, 240mL respectively with graduated cylinder to be placed in slurry cup, stirred below in 10,000r/min rotating speed
While sequentially adding 2.5g high temperature resistances oxygen scavenger, 1.6g film inhibitors, 20mL passivation corrosion inhibiter, high-speed stirred 20min is added
200g calcium chloride, high-speed stirred 20min adds 240g calcium bromides, high-speed stirred 40min.
Embodiment 5
Using calcium chloride as heavy weight additive, configuration density is 1.3g/cm3Low thermal conductivity heat-insulating test fluid：Measured respectively with graduated cylinder
Take the low heat conduction base fluid of 160mL fresh water, 240mL to be placed in slurry cup, sequentially added while stirring under 10,000r/min rotating speed
2.4g high temperature resistances oxygen scavenger, 0.95g film inhibitors, high-speed stirred 20min add 200g calcium chloride, high-speed stirred 40min.
Performance test：
1. heat conductivility evaluation
The thermal conductivity factor of the low thermal conductivity heat-insulating test fluid of the preparation of embodiment 4 at different temperatures is determined, 1 is the results are shown in Table.
The thermal conductivity factor of table 1 (W/ (mK))
| Temperature, DEG C | 4 | 10 | 15 | 20 | 25 | 30 | 40 | 50 | 60 |
| Embodiment 4 | 0.2982 | 0.3051 | 0.3123 | 0.3184 | 0.3226 | 0.3285 | 0.3328 | 0.3365 | 0.3363 |
As it can be seen from table 1 with the rise of temperature, the thermal conductivity factor of system shows a rising trend, temperature reach 40 DEG C with
Afterwards, thermal conductivity factor is held essentially constant, and is maintained at 0.336W/ (mK) left and right；Thermal conductivity factor under low temperature environment is smaller, is less than
0.3W/ (mK), illustrates that low thermal conductivity heat-insulating test fluid prepared by embodiment 4 has good effect of heat insulation.
2. anti-dilative evaluation
Low thermal conductivity heat-insulating test fluid 20mL prepared by Example 4, by two grades of bentonites in drying 2h, normal temperature at 105 DEG C
Under weigh three parts of each 5g of bentonite, be respectively placed in three centrifuge tubes, then draw with pipette 10ml low thermal conductivity heat-insulatings respectively
Test fluid, distilled water, kerosene, are sequentially placed into above three centrifuge tube, 2h are stood at room temperature.With centrifuge in 1500r/
Min constant speed centrifuges 15min, takes out centrifuge tube after stopping, and reads volume of the bentonite in test tube, using commonly used in the art
Method calculate the anti-dilative of system, the results are shown in Table 2.
The anti-dilative of the low thermal conductivity heat-insulating test fluid of table 2
| Low thermal conductivity heat-insulating test fluid | Anti-dilative % |
| Embodiment 4 | 96.46 |
3. corrosion rate evaluation
The 550mL embodiments 4-5 low thermal conductivity heat-insulating test fluids prepared are placed in titanium alloy corrosion tank, by what is handled well
N80 steel discs are hung on the hook of lid, are tightened lid in constant temperature aging 72h at 175 DEG C, are evaluated it at 175 DEG C to steel disc
Corrosion condition, the results are shown in Table 3 and Fig. 1.
The high temperature corrosion speed evaluation result of table 3
Corrosion all very little of the low thermal conductivity heat-insulating test fluid to steel disc of embodiment 4-5 preparations is can be seen that from table 3 and Fig. 1,
Illustrate that the low thermal conductivity heat-insulating test fluid has excellent antiseptic property.
4. hydrate inhibition is evaluated
Low thermal conductivity heat-insulating test fluid prepared by 400g embodiments 4 load gas hydrates formed/suppress pilot system
In, sealing is vacuumized, and temperature is set as into 3 DEG C, pressurization injection gas makes pressure stability in 20MPa, closes intake valve, starts to survey
The change of attached temperature and pressure, is as a result shown in Fig. 2 in examination, record 4800min.
Figure it is seen that temperature and pressure is always maintained at stabilization in whole test process, without the rise of obvious temperature
Or pressure reduction phenomenon.Illustrate on this condition, low thermal conductivity heat-insulating test fluid prepared by the embodiment 4 will not form gas water
Compound.
Thermal conductivity factor, anti-dilative, hydrate inhibition and the embodiment 4 of low thermal conductivity heat-insulating test fluid prepared by embodiment 5
The above-mentioned performance of the low thermal conductivity heat-insulating test fluid of preparation is essentially identical, no longer lists one by one.
Although the embodiment disclosed by the application is as above, described content is only to readily appreciate the application and use
Embodiment, is not limited to the application.Technical staff in any the application art, is taken off not departing from the application
On the premise of the spirit and scope of dew, any modification and change, but the application can be carried out in the form and details of implementation
Scope of patent protection, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of low thermal conductivity heat-insulating test fluid, the test fluid includes water, low heat conduction base fluid, high temperature resistance oxygen scavenger and film forming inhibition
Agent, wherein, the low heat conduction base fluid be can binary miscible with water or ternary Organic Alcohol, its molecular weight≤100, thermal conductivity factor≤
0.3W/m·K。
2. low thermal conductivity heat-insulating test fluid according to claim 1, the addition sum using water and low heat conduction base fluid is 100mL
Meter, the addition of the water is 40-50mL, and the addition of the low heat conduction base fluid is 50-60mL, the high temperature resistance oxygen scavenger
Addition is 0.5-0.8g, and the addition of the film inhibitor is 0.2-0.5g.
3. low thermal conductivity heat-insulating test fluid according to claim 1 or 2, in addition to passivation corrosion inhibiter and/or heavy weight additive；With water
Counted with the addition sum of low heat conduction base fluid for 100mL, the addition of the passivation corrosion inhibiter is 2-5mL；With water and low heat conduction
The addition sum of base fluid is counted for 100mL, and the addition of the heavy weight additive is 10-120g.
4. low thermal conductivity heat-insulating test fluid according to claim 1 or 2, wherein, the low heat conduction base fluid is selected from ethylene glycol, third
One or more in glycol, glycerine.
5. low thermal conductivity heat-insulating test fluid according to claim 1 or 2, wherein, the high temperature resistance oxygen scavenger is selected from dimethyl
One or more in ketoxime, reducible sulfur hydrochlorate.
6. low thermal conductivity heat-insulating test fluid according to claim 1 or 2, wherein, the film inhibitor is that carbon number is 16-20
Alkyl polyamine compound, be the compound of hexadecyl amine and octadecylamine alternatively.
7. low thermal conductivity heat-insulating test fluid according to claim 3, wherein, it is 3-5 that the passivation corrosion inhibiter, which includes weight ratio,：
3.5-4：1.5-2.8 imidazoline, ammonium mercaptoacetate and borate.
8. low thermal conductivity heat-insulating test fluid according to claim 3, wherein, the heavy weight additive is inorganic calcium salt heavy weight additive；Can
Selection of land, is calcium chloride and/or calcium bromide.
9. a kind of method of the low thermal conductivity heat-insulating test fluid prepared according to any one of claim 1-8, methods described bag
Include：Counted using the addition sum of water and low heat conduction base fluid as 100mL, add 40-50mL water, the low heat conduction base fluids of 50-60mL, 0.5-
0.8g high temperature resistances oxygen scavenger, 0.2-0.5g film inhibitors, alternatively, add 2-5mL passivation corrosion inhibiter, 10-120g heavy weight additives,
Stirring mixing, obtains the low thermal conductivity heat-insulating test fluid.
10. low thermal conductivity heat-insulating test fluid according to any one of claim 1-8 is in the Oil/gas Well of bottom hole temperature (BHT)≤175 DEG C
In be used as the purposes of heat-insulated test fluid or heat-insulated packer fluids, alternatively, the Oil/gas Well for depth of water 500-1500m deep well or
The depth of water is more than 1500m ultra-deep well.
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