CN103837645A - Method for measuring antiscale rate in different dosage of chelate ternary copolymerization antiscale - Google Patents
Method for measuring antiscale rate in different dosage of chelate ternary copolymerization antiscale Download PDFInfo
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- CN103837645A CN103837645A CN201210471655.8A CN201210471655A CN103837645A CN 103837645 A CN103837645 A CN 103837645A CN 201210471655 A CN201210471655 A CN 201210471655A CN 103837645 A CN103837645 A CN 103837645A
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- antiscale
- ternary polymerization
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- scale inhibitor
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Abstract
The invention discloses a method for measuring antiscale rates in different dosages of a chelating-type ternary polymerization antiscale, which comprises the steps of: (a) initially, preparing a chelate ternary copolymerization antiscale solution and scale samples for later use, (b) selecting several experiment vessels cleaning and drying for later use, (c) then, respectively adding the same amount of the scale samples to the experiment vessels and mixing with added solvents, (d) respectively adding different amounts of the chelating-type ternary polymerization antiscale to experiment vessels, (e) respectively heating the experiment vessels in water-baths, (f) according to experiment result, respectively calculating the antiscale rates in different dosages of the chelate ternary copolymerization antiscale. The invention is capable to successfully measure the antiscale rates of the chelating-type ternary polymerization antiscale in different dosages with accurate measuring result and low measuring cost by simple measuring steps, and provides theory base for the application of the chelate ternary copolymerization antiscale to descaling.
Description
Technical field
The present invention relates to the antiscaling rate method of testing of a kind of chelating type ternary polymerization scale inhibitor under different amounts.
Background technology
In oilfield exploitation procedure, fluid (oil, G&W) in hydrocarbon-bearing pool flows out from stratum, to surface gathering system, due to the variation of the condition such as temperature, pressure and the thermodynamic phase of water and chemical incompatibility, cause oil gas water balance state to be destroyed through pit shaft, well head.Often cause water filling stratum, tubing and casing, down-hole, uphole equipment and gathering system to occur fouling.Fouling has larger impact to the normal production of oil well, in the time that dirt deposition is on the equipment such as pit shaft, oil pipe, oil well pump, waterflood system, gathering system, heating system, can cause equipment not run well, heat transfer efficiency reduces, cause productive capacity to decline, and fouling also can cause the corrosion of equipment and pipeline, cause serious economic loss to oil field.
Existing scale inhibitor mainly contains aminopolycanboxylic acid's salt, organic multicomponent phosphonic acid based and organic polymer three major types.Aminopolycanboxylic acid's salt Chelate stability constants is large, can be used for higher temperature, but consumption is large, and cost is high; Organic multicomponent phosphonic acids to barium sulphate, strontium sulfate without antiscaling effect; And what mostly use is organic polymer scale inhibitor, uses monomer and maleic anhydride, acrylic acid copolymer to expect raising antiscaling rate more, but owing to fundamentally not changing polymer architecture, do not reach the antiscaling effect of expection.
In crude oil production process, fouling is a kind of ubiquitous phenomenon, and fouling is simultaneously one of the most serious problem running in the water water quality control of oil field.Fouling has larger impact to the normal production of oil well, and dirt deposition can stop up formation pore, crack on stratum, cause permeability reduction, and crude production rate is declined, and even causes oil well to stop production when serious, and the oil reservoir lower on permeability affects more very; In the time that dirt deposition is on the equipment such as pit shaft, oil pipe, oil well pump, waterflood system, gathering system, heating system, can cause equipment not run well, heat transfer efficiency reduces, cause productive capacity to decline, and fouling also can cause the corrosion of equipment and pipeline, cause serious economic loss to oil field.
The main cause of fouling is due to pressure or temperature change, and evaporation or two kinds of water of 5 of mismatching mix mutually, make to be originally present in the inorganic salts (CaCO in aqueous solution with ionic condition
3, CaSO
4or BaSO
4) reach hypersaturated state, exceeded their solubleness and crystallize out into dirt.Fouling process is the process of certain density incrustation ion crystallization and gathering under certain physical and chemical condition (as pressure, temperature) and equipment surface situation.It is the basic reason that causes fouling that equilibrium state goes to pot.
Chemical scale inhibition agent is the gentle technology of separating fouling of inhibition that oil field is commonly used the most.In order to prevent fouling, ground flow, oil well and water-injection plant need be connected or in system, add scale inhibitor off and on.For the various fouling situations in oil field, there are two class solutions: the one, scale removal; The 2nd, antiscale.Scale removal is a kind of remedial measures, and when scale removal, the corrosion that it has produced the underproduction and equipment, has caused larger economic loss, therefore, prevents that dirty generation is only a kind of good measure.In the method for antiscale, with chemical agent antiscale be people generally acknowledge the simplest, effectively, convenient, economic method.Therefore each oil field all adapts to the chemical scale inhibition agent of different condition for block the characteristic study separately.And develop the efficient scale inhibitor common objective that just generally pursue in each oil field especially.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, the antiscaling rate method of testing of a kind of chelating type ternary polymerization scale inhibitor under different amounts is provided, this method of testing can successfully test out the antiscaling rate of chelating type ternary polymerization scale inhibitor under different amounts, and test result is accurate, testing procedure is simple, testing cost is low, provides theoretical foundation for chelating type ternary polymerization scale inhibitor is applied to scale removal.
Object of the present invention is achieved through the following technical solutions: the antiscaling rate method of testing of a kind of chelating type ternary polymerization scale inhibitor under different amounts, comprises step: (a) first, prepare chelating type ternary polymerization scale inhibitor solution and dirty sample for subsequent use; (b) choose several experiment containers, cleaning-drying is for subsequent use; (c) then, in experiment container, add the dirty sample of same amount respectively, and add solvent; (d) in experiment container, add the different chelating type ternary polymerization scale inhibitors of measuring respectively; (e) experiment container being placed in respectively to water-bath heats: (f) result by experiment, calculates respectively the antiscaling rate of chelating type ternary polymerization scale inhibitor under different amounts.
Described reaction vessel is beaker.
Described bath temperature is 40 DEG C.
Described chelating type ternary polymerization scale inhibitor consumption is respectively 2mg/L, 4 mg/L, 6 mg/L, 8mg/L, 10mg/L, 12 mg/L.
In sum, the invention has the beneficial effects as follows: can successfully test out the antiscaling rate of chelating type ternary polymerization scale inhibitor under different amounts, and test result is accurate, testing procedure is simple, testing cost is low, provides theoretical foundation for chelating type ternary polymerization scale inhibitor is applied to scale removal.
Brief description of the drawings
Fig. 1 is the antiscaling rate schematic diagram of chelating type ternary polymerization scale inhibitor under different amounts.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment:
The antiscaling rate method of testing of a kind of chelating type ternary polymerization scale inhibitor the present invention relates under different amounts, comprises step: (a) first, prepare chelating type ternary polymerization scale inhibitor solution and dirty sample for subsequent use; (b) choose several experiment containers, cleaning-drying is for subsequent use; (c) then, in experiment container, add the dirty sample of same amount respectively, and add solvent; (d) in experiment container, add the different chelating type ternary polymerization scale inhibitors of measuring respectively; (e) experiment container being placed in respectively to water-bath heats: (f) result by experiment, calculates respectively the antiscaling rate of chelating type ternary polymerization scale inhibitor under different amounts.
Described reaction vessel is beaker.
Described bath temperature is 40 DEG C.
Described chelating type ternary polymerization scale inhibitor consumption is respectively 2mg/L, 4 mg/L, 6 mg/L, 8mg/L, 10mg/L, 12 mg/L.
The result recording according to said method as shown in Figure 1, as shown in Figure 1, in ternary polymerization scale inhibitor consumption less (about 1mg/L～6mg/L) scope, rate of curve is larger, when multipolymer consumption is higher than certain limit during as 8mg/L, it is mild that curve becomes, and now continues to increase multipolymer consumption, not remarkable on antiscaling effect impact.In order to obtain good economic benefit, economize on resources, add a small amount of multipolymer just can reach higher antiscaling rate, ternary polymerization scale inhibitor consumption is comparatively suitable at 8mg/L～10mg/L.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, every foundation technical spirit of the present invention, and any simple modification, equivalent variations that above embodiment is done, within all falling into protection scope of the present invention.
Claims (4)
1. the antiscaling rate method of testing of chelating type ternary polymerization scale inhibitor under different amounts, is characterized in that, comprises step: (a) first, prepare chelating type ternary polymerization scale inhibitor solution and dirty sample for subsequent use; (b) choose several experiment containers, cleaning-drying is for subsequent use; (c) then, in experiment container, add the dirty sample of same amount respectively, and add solvent; (d) in experiment container, add the different chelating type ternary polymerization scale inhibitors of measuring respectively; (e) experiment container being placed in respectively to water-bath heats: (f) result by experiment, calculates respectively the antiscaling rate of chelating type ternary polymerization scale inhibitor under different amounts.
2. the antiscaling rate method of testing of chelating type ternary polymerization scale inhibitor according to claim 1 under different amounts, is characterized in that, described reaction vessel is beaker.
3. the antiscaling rate method of testing of chelating type ternary polymerization scale inhibitor according to claim 1 under different amounts, is characterized in that, described bath temperature is 40 DEG C.
4. the antiscaling rate method of testing of chelating type ternary polymerization scale inhibitor according to claim 1 under different amounts, it is characterized in that, described chelating type ternary polymerization scale inhibitor consumption is respectively 2mg/L, 4 mg/L, 6 mg/L, 8mg/L, 10mg/L, 12 mg/L.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210471655.8A CN103837645A (en) | 2012-11-20 | 2012-11-20 | Method for measuring antiscale rate in different dosage of chelate ternary copolymerization antiscale |
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| CN201210471655.8A CN103837645A (en) | 2012-11-20 | 2012-11-20 | Method for measuring antiscale rate in different dosage of chelate ternary copolymerization antiscale |
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Application publication date: 20140604 |