CN106256879A - Oil-based drill cuttings extract, the extracting process of oil-based drill cuttings - Google Patents
Oil-based drill cuttings extract, the extracting process of oil-based drill cuttings Download PDFInfo
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Abstract
The invention provides a kind of oil-based drill cuttings extract, the extracting process of oil-based drill cuttings, this oil-based drill cuttings extract includes: ionic liquid, synergic reagent and water；Described ionic liquid, synergic reagent are (3～5): 1:(8～10 with the mass ratio of water).Compared with prior art, the present invention utilizes extraction and the permeance property of ionic liquid, and the emulsifiability of synergic reagent, is entered in oil-based drill cuttings extract by the petroleum component extracting and enriching in oil-based drill cuttings；Further, ionic liquid, as green solvent, can eliminate because using environmental pollution and safety problem produced by volatile organic solvent, it is achieved the low cost harmless treatment of oily solid sludge.
Description
Technical field
The invention belongs to oil and gas industry drilling well solid waste processing technology field, particularly relate to a kind of oil-based drill cuttings extract, the extracting process of oil-based drill cuttings.
Background technology
In oilfield exploitation procedure, a large amount of oil base drilling fluid drillings (being called for short: oil-based drill cuttings) of generation are because containing the pollutant such as petroleum-type, heavy metal, being put into National Hazard garbage, it is necessary to process it.In ocean, commonly used concentration reinjection into reservoir processing method, cost is the highest, and the requirement to reinjection into reservoir is the harshest, is limited by ground sheaf space, it has to often find suitable stratum.Due to the restriction of the protection of the subterranean resource such as subsoil water and technology with cost, domestic and international land bored well generally uses the method process such as concentration storage, security landfill, heat treatment, way of distillation process.The processing cost of security landfill is low, but is simply closed pollutant and isolated, it is impossible to pollutant are completely eliminated, environmental risk is the biggest, and, either reinjection into reservoir or security landfill, all cannot reclaim contained mineral oil, cause the significant wastage of resource；The oil-based drill cuttings processing method complex process such as heat treatment, the way of distillation, cost are high, and general oilfield enterprise is difficult to bear.
At present, chemical extraction method because possessing that selectivity is good, equipment is simple, easy and simple to handle, it is easy to accomplish serialization, Automated condtrol, response rate advantages of higher, become the effective ways of oil-based drill cuttings resource and harmless treatment, it is it is crucial that find suitable extractant.
Chen Yonghong etc. point out in " abandoned oil base drilling fluid treatment technology overview and the application technology thereof " that Environment protection of oil field impurity is delivered; the extractant of domestic employing is mainly organic solvent such as hexane, ethyl acetate or chlorohydrocarbon etc., emphasizes that the use of organic solvent brings that pollution environment, safety requirements be strict, high in cost of production defect.Therefore, use environment amenable green solvent to replace conventional organic solvents to have important practical significance for the extraction process of oil-based drill cuttings.
Ionic liquid because of possess extremely low vapour pressure, non-volatile, do not burn, good heat stability, the characteristic such as can be recycled it is considered to be 21 century preferably " green solvent ".
The present invention considers to be used for preparing oil-based drill cuttings extract by ionic liquid.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of oil-based drill cuttings extract, the extracting process of oil-based drill cuttings, and this oil-based drill cuttings extract uses ionic liquid preparation and environmentally safe.
The invention provides a kind of oil-based drill cuttings extract, including: ionic liquid, synergic reagent and water；Described ionic liquid, synergic reagent are (3～5): 1:(8～10 with the mass ratio of water).
Preferably, described ionic liquid is glyoxaline ion liquid.
Preferably, described ionic liquid is selected from 1-hexyl-3-Methylimidazole. Bromide, 1-hexyl-3-Methylimidazole. chlorate, 1-octyl group-3-Methylimidazole. Bromide, 1-octyl group-3-Methylimidazole. chlorate, 1-dodecyl-3-Methylimidazole. Bromide and one or more in 1-dodecyl-3-Methylimidazole. chlorate.
Preferably, described synergic reagent is selected from iso-octyl palmitate, myristamide propyl group pg dimonium chloride phosphate ester and one or more in sodium lauroyl glutamate.
Present invention also offers the extracting process of a kind of oil-based drill cuttings, including:
After oil-based drill cuttings extract and oil-based drill cuttings mix and blend, centrifugation, obtain liquid phase and solid phase；
Described oil-based drill cuttings extract includes ionic liquid, synergic reagent and water；Described ionic liquid, synergic reagent are (3～5): 1:(8～10 with the mass ratio of water).
Preferably, described oil-based drill cuttings extract is (1.5～2) with the mass ratio of oil-based drill cuttings: 1.
Preferably, the speed of described stirring is 200～300rpm；The time of stirring is 3～7min.
Preferably, the rotating speed of described centrifugation is 2500～3500rpm；The time of centrifugation is 5～10min.
Preferably, also include:
Described upper phase is mixed with strippant, stands, obtain oil phase and aqueous phase.
Preferably, the quality of described strippant is the 1%～2.5% of upper phase quality.
The invention provides a kind of oil-based drill cuttings extract, the extracting process of oil-based drill cuttings, this oil-based drill cuttings extract includes: ionic liquid, synergic reagent and water；Described ionic liquid, synergic reagent are (3～5): 1:(8～10 with the mass ratio of water).Compared with prior art, the present invention utilizes extraction and the permeance property of ionic liquid, and the emulsifiability of synergic reagent, and the oil in oil-based drill cuttings divides extracting and enriching enter in oil-based drill cuttings extract；Further, ionic liquid, as green solvent, can eliminate because using environmental pollution and safety problem produced by volatile organic solvent, it is achieved the low cost harmless treatment of oil-containing solid waste.
From experiment, using the oil-based drill cuttings oil content after the inventive method extraction to be respectively less than 1%, oil recovery rate reaches more than 90%.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
The invention provides a kind of oil-based drill cuttings extract, including: ionic liquid, synergic reagent and water；Described ionic liquid, synergic reagent are (3～5): 1:(8～10 with the mass ratio of water), it is preferably (3～4): 1:(8～10), more preferably (3～4): 1 (8～9), most preferably 3:1:8.
Wherein, described ionic liquid is preferably glyoxaline ion liquid, more preferably 1-hexyl-3-Methylimidazole. Bromide, 1-hexyl-3-Methylimidazole. chlorate, 1-octyl group-3-Methylimidazole. Bromide, 1-octyl group-3-Methylimidazole. chlorate, 1-dodecyl-3-Methylimidazole. Bromide and one or more in 1-dodecyl-3-Methylimidazole. chlorate.
Ionic liquid because of possess extremely low vapour pressure, non-volatile, do not burn, good heat stability and the characteristic such as can be recycled it is considered to be 21 century preferably " green solvent ".(1) environmental protection aspect is had the advantage that: the vapour pressure that ionic liquid not can detect that compared with using ionic liquid as the extraction of oil-based drill cuttings extract and organic solvent, non-volatile, overcome the environmental problem that the strong volatility of conventional organic solvents is brought；(2) extraction ability aspect: by regulating the physical and chemical performance of ionic liquid, including polarity, lipophile etc., realize the ionic liquid dissolubility to inorganic matter, Organic substance, gas, metal complex and polymer, simultaneously because ionic liquid is ionic compound, in system, dispersion rate is fast, the coefficient of dispersion is high several orders of magnitude than common organic solvents, Gu oil-water-three-phase can be made to realize sharp separation；(3) present aspect is extracted into: the dissolubility of ionic liquid can be changed significantly by very small amount acid-base value or the interpolation of deformity regulator, utilizes this characteristic to be prone to ionic liquid and separates and recovers from oil phase, and can realize being used repeatedly.
The synergic reagent that described synergic reagent is well known to those skilled in the art, there is no special restriction, is preferably iso-octyl palmitate, myristamide propyl group pg dimonium chloride phosphate ester and one or more in sodium lauroyl glutamate in the present invention.
The present invention utilizes extraction and the permeance property of ionic liquid, and the emulsifiability of synergic reagent, is entered in oil-based drill cuttings extract by the petroleum component extracting and enriching in oil-based drill cuttings；Further, ionic liquid, as green solvent, can eliminate because using environmental pollution and safety problem produced by volatile organic solvent, it is achieved the low cost harmless treatment of oil-containing solid waste.
Present invention also offers the extracting process of a kind of oil-based drill cuttings, including: after oil-based drill cuttings extract and oil-based drill cuttings mix and blend, centrifugation, obtain liquid phase and solid phase；Described oil-based drill cuttings extract includes ionic liquid, synergic reagent and water；Described ionic liquid, synergic reagent are (3～5): 1:(8～10 with the mass ratio of water).
Wherein, described oil-based drill cuttings extract is described identical with upper, does not repeats them here.
By oil-based drill cuttings extract and oil-based drill cuttings mix and blend, wherein said oil-based drill cuttings extract is preferably (1.5～2) with the mass ratio of oil-based drill cuttings: 1, more preferably (1.6～1.8): 1；The speed of described mix and blend is preferably 200～300rpm, more preferably 250～300rpm；The time of described mix and blend is preferably 3～7min, more preferably 3～5min.
After mix and blend, it is centrifuged separating.The rotating speed of described centrifugation is preferably 2500～3500rpm, more preferably 3000～3500rpm；The time of described centrifugation is preferably 5～10min, more preferably 8～10min.
After centrifugation, obtain liquid phase and solid phase.Drilling cuttings after wherein solid phase is extraction can carry out safe disposal.
According to the present invention, preferably the liquid phase obtained is mixed with strippant, stand, obtain oil phase and aqueous phase.
Wherein, the back extraction that described strippant is well known to those skilled in the art, there is no special restriction, the present invention is preferably alcohols solvent, more preferably methanol, ethanol and one or more in butanol, be further preferably methanol, ethanol and the one in butanol；The Functionality, quality and appealing design of described strippant elects the 1%～2.5% of liquid phase quality, more preferably 1.5%～2.5% as.
Liquid phase being mixed with strippant, stand, the time of described standing is preferably 3～5min, and liquid phase is divided into two-layer, obtains oil phase and aqueous phase.Wherein, oil phase may be recovered utilization, aqueous phase be mainly composed of ionic liquid, synergic reagent and water, its mass ratio is still at (3～5): 1:(8～10) within the scope of, therefore, aqueous phase can directly reuse, and repeatable utilizes 14～16 times.
Extracting process of the present invention is simple to operate, and equipment investment is few, and without the generation of secondary wastewater, it is achieved that resource is with innoxious.
In order to further illustrate the present invention, the oil-based drill cuttings extract, the extracting process of oil-based drill cuttings that provide the present invention below in conjunction with embodiment are described in detail.
Reagent used in following example is commercially available.
In embodiment, the composition of oil-based drill cuttings extract, is shown in Table 1.
The composition of table 1 oil-based drill cuttings extract
In embodiment, the mass ratio of each component in oil-based drill cuttings extract, is shown in Table 2.
The mass ratio of each component in table 2 oil-based drill cuttings extract
Embodiment 1
Certain oil field 1000g oil-based drill cuttings is placed in a container with stirring facility by 1.1, under being stirred continuously with the speed of 200rpm, adds the above-mentioned C1 oil-based drill cuttings extract that 1500g mass ratio is M1, stirs 3min, obtain solidliquid mixture；By described solidliquid mixture centrifugation 5min under the conditions of rotating speed is 2500rpm, obtain liquid phase and solid phase.
Adding methanol in 1.2 upper phase obtained in 1.1, the quality of methanol is the 1% of liquid phase quality, stands 3min, obtains oil phase and aqueous phase.Aqueous phase after separation can be directly used for the extraction of next round oil-based drill cuttings, repeatable utilizes 14 times.
Embodiment 2
Certain oil field 1000g oil-based drill cuttings is placed in a container with stirring facility by 2.1, under being stirred continuously with the speed of 300rpm, adds the above-mentioned C5 oil-based drill cuttings extract that 2000g mass ratio is M3, stirs 5min, obtain solidliquid mixture；By described solidliquid mixture centrifugation 10min under the conditions of rotating speed is 3500rpm, obtain upper phase and lower floor's solid phase.
Adding ethanol in 2.2 upper phase obtained in 2.1, the quality of ethanol is the 1.5% of liquid phase quality, stands 4min, obtains oil phase and aqueous phase.Aqueous phase after separation can be directly used for the extraction of next round oil-based drill cuttings, repeatable utilizes 15 times.
Embodiment 3
Certain oil field 1000g oil-based drill cuttings is placed in a container with stirring facility by 3.1, under being stirred continuously with the speed of 300rpm, adds the above-mentioned C5 oil-based drill cuttings extract that 1600g mass ratio is M5, stirs 5min, obtain solidliquid mixture；By described solidliquid mixture centrifugation 8min under the conditions of rotating speed is 3000rpm, obtain liquid phase and solid phase.
Adding butanol in 3.2 liquid phases obtained in 3.1, the quality of butanol is the 2% of upper phase quality, stands 5min, obtains oil phase and aqueous phase.Aqueous phase after separation can be directly used for the extraction of next round oil-based drill cuttings, repeatable utilizes 16 times.
Embodiment 4
Certain oil field 1000g oil-based drill cuttings is placed in a container with stirring facility by 4.1, under being stirred continuously with the speed of 300rpm, adds the above-mentioned C11 oil-based drill cuttings extract that 1700g mass ratio is M7, stirs 3min, obtain solidliquid mixture；By described solidliquid mixture centrifugation 10min under the conditions of rotating speed is 3500rpm, obtain liquid phase and solid phase.
Adding butanol in 4.2 liquid phases obtained in 4.1, the quality of butanol is the 2.5% of liquid phase quality, stands 3min, obtains oil phase and aqueous phase.Aqueous phase after separation can be directly used for the extraction of next round oil-based drill cuttings, repeatable utilizes 16 times.
Embodiment 5
Certain oil field 1000g oil-based drill cuttings is placed in a container with stirring facility by 5.1, under being stirred continuously with the speed of 300rpm, adds the above-mentioned C15 oil-based drill cuttings extract that 1800g mass ratio is M8, stirs 5min, obtain solidliquid mixture；By described solidliquid mixture centrifugation 8min under the conditions of rotating speed is 2500rpm, obtain liquid phase and solid phase.
Adding methanol in 5.2 liquid phases obtained in 5.1, the quality of methanol is the 1.5% of liquid phase quality, stands 4min, obtains oil phase and aqueous phase.Aqueous phase after separation can be directly used for the extraction of next round oil-based drill cuttings, repeatable utilizes 16 times.
Embodiment 6
Certain oil field 1000g oil-based drill cuttings is placed in a container with stirring facility by 6.1, under being stirred continuously with the speed of 300rpm, adds the above-mentioned C18 oil-based drill cuttings extract that 1900g mass ratio is M10, stirs 7min, obtain solidliquid mixture；By described solidliquid mixture centrifugation 5min under the conditions of rotating speed is 2500rpm, obtain liquid phase and solid phase.
Adding ethanol in 6.2 liquid phases obtained in 6.1, the quality of ethanol is the 2% of liquid phase quality, stands 5min, obtains oil phase and aqueous phase.Aqueous phase after separation can be directly used for the extraction of next round oil-based drill cuttings, repeatable utilizes 16 times.
The oil content before and after the oil-based drill cuttings in embodiment 1～6 is processed by gas chromatography in " exhibition land used evaluation criteria of soil environment quality " (HJ350-2007) is used to be measured, the results are shown in Table 3, wherein oil content after oil recovery rate=(oil content after oil content-process before processing)/process, the oil-based drill cuttings after process i.e. lower floor's solid phase.
Oil content before and after the process of table 3 embodiment 1～6 oil-based drill cuttings
As shown in Table 3, oil-based drill cuttings extract of the present invention is 88.28%～93.97% to the oil recovery rate of the oil-based drill cuttings that different oil base drilling fluids produce, after extraction, the oil content of oil-based drill cuttings is 0.69%～0.98%, meets the requirement that the oil content of " restriction of offshore oil exploration and exploitation Pollutant emission concentration " (GB4914-2008) is less than 1%.
The oil content of oil-based drill cuttings after the recycling of aqueous phase in embodiment 1～6 is measured, the results are shown in Table 4.
Table 4 aqueous phase recycling result
As shown in Table 4, after reusing 14～16 times, after oil-based drill cuttings processes, oil content in solid phase is respectively less than 1%, meet " restriction of offshore oil exploration and exploitation Pollutant emission concentration " (GB4914-2008) requirement, the extracting process of oil-based drill cuttings of the present invention has the advantages such as simple to operate, environmental protection, low cost.
Claims (10)
1. an oil-based drill cuttings extract, it is characterised in that including: ionic liquid, synergic reagent and water；
Described ionic liquid, synergic reagent are (3～5): 1:(8～10 with the mass ratio of water).
Oil-based drill cuttings extract the most according to claim 1, it is characterised in that described ionic liquid
For glyoxaline ion liquid.
Oil-based drill cuttings extract the most according to claim 1, it is characterised in that described ionic liquid
Selected from 1-hexyl-3-Methylimidazole. Bromide, 1-hexyl-3-Methylimidazole. chlorate, 1-octyl group-3-methyl miaow
Azoles Bromide, 1-octyl group-3-Methylimidazole. chlorate, 1-dodecyl-3-Methylimidazole. Bromide and 1-ten
One or more in dialkyl group-3-Methylimidazole. chlorate.
Oil-based drill cuttings extract the most according to claim 1, it is characterised in that described synergic reagent selects
From iso-octyl palmitate, myristamide propyl group pg dimonium chloride phosphate ester and sodium lauroyl glutamate
In one or more.
5. the extracting process of an oil-based drill cuttings, it is characterised in that including:
After oil-based drill cuttings extract and oil-based drill cuttings mix and blend, centrifugation, obtain liquid phase and solid phase；
Described oil-based drill cuttings extract includes ionic liquid, synergic reagent and water；Described ionic liquid, association's extraction
Agent is (3～5): 1:(8～10 with the mass ratio of water).
Extracting process the most according to claim 5, it is characterised in that described oil-based drill cuttings extract
It is (1.5～2) with the mass ratio of oil-based drill cuttings: 1.
Extracting process the most according to claim 5, it is characterised in that the speed of described stirring is
200～300rpm；The time of stirring is 3～7min.
Extracting process the most according to claim 5, it is characterised in that the rotating speed of described centrifugation
It is 2500～3500rpm；The time of centrifugation is 5～10min.
Extracting process the most according to claim 5, it is characterised in that also include:
Described upper phase is mixed with strippant, stands, obtain oil phase and aqueous phase.
Extracting process the most according to claim 9, it is characterised in that the matter of described strippant
Amount is the 1%～2.5% of liquid phase quality.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111636833A (en) * | 2019-03-01 | 2020-09-08 | 中国石油天然气集团有限公司 | Oil-removing treatment device and method for oil-based drilling cuttings |
| CN113046111A (en) * | 2021-03-25 | 2021-06-29 | 成都得道实业有限公司 | Leaching agent for diesel oil-based or/and white oil-based oil-containing drilling cuttings, and preparation method and application thereof |
| CN114247178A (en) * | 2021-12-22 | 2022-03-29 | 中国石油天然气集团有限公司 | Extractant for treating oil-based drilling cuttings and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103111086A (en) * | 2012-12-26 | 2013-05-22 | 成都市幅原环保科技有限责任公司 | Solvent for leaching oil in drillings and leaching method |
| CN103710549A (en) * | 2013-12-13 | 2014-04-09 | 天津科技大学 | Method for efficiently extracting lithium from salt lake brine |
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2015
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103111086A (en) * | 2012-12-26 | 2013-05-22 | 成都市幅原环保科技有限责任公司 | Solvent for leaching oil in drillings and leaching method |
| CN103710549A (en) * | 2013-12-13 | 2014-04-09 | 天津科技大学 | Method for efficiently extracting lithium from salt lake brine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111636833A (en) * | 2019-03-01 | 2020-09-08 | 中国石油天然气集团有限公司 | Oil-removing treatment device and method for oil-based drilling cuttings |
| CN113046111A (en) * | 2021-03-25 | 2021-06-29 | 成都得道实业有限公司 | Leaching agent for diesel oil-based or/and white oil-based oil-containing drilling cuttings, and preparation method and application thereof |
| CN114247178A (en) * | 2021-12-22 | 2022-03-29 | 中国石油天然气集团有限公司 | Extractant for treating oil-based drilling cuttings and application thereof |
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