CN105217761A - A kind of oil field extracted water treatment agent - Google Patents
A kind of oil field extracted water treatment agent Download PDFInfo
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- CN105217761A CN105217761A CN201510746288.1A CN201510746288A CN105217761A CN 105217761 A CN105217761 A CN 105217761A CN 201510746288 A CN201510746288 A CN 201510746288A CN 105217761 A CN105217761 A CN 105217761A
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Abstract
The present invention discloses a kind of oil field extracted water treatment agent, and filling a prescription is: polyurethane 10 parts, trade effluent coagulant special 20 parts (wherein aluminium sesquioxide content is 26%-30%), 70 parts, water are raw material.Treatment process is, in oil field extracted water, stir 1% aqueous solution dropping into oil field extracted water treatment agent, the dosage for the treatment of agent is 120mg-180mg/L, churning time 2-3min, leaves standstill 10-15min.The present invention only need add a kind of medicament, and this kind of medicament has flocculation concurrently and help solidifying effect, has absorption and bridging action preferably, has good adsorption-condensation, thus make water outlet limpid to suspended substance; The flco formed is large and weigh, and settlement is very fast, eliminates adding of weighting agent, can meet the processing requirements to recovered water on oil field.
Description
Technical field
The present invention relates to oil field extracted water treatment agent, be specially adapted to the process of the oil field extracted water that saltiness is higher, suspended substance is higher.
Background technology
In oil production process, the crude oil of extraction contains a large amount of water, and separated by water after oil, gas, water three phase separation, the water separated is called oil field extracted water.China is one of viscous crude resource-rich country, now having verified heavy oil reserves is 1,400,000,000 tons, account for 28% of crude oil in China reserves, thus improve thick oil recovery ratio, be volume increase in oilfield construction, stable yields, swash and produce, improve the very important step of overall oil recovery factor.But viscous crude needs to adopt thermal recovery boiler steam treatment to take, and thermal recovery boiler proposes high requirement to water quality, and along with the expansion of thermal recovery mining-employed reserves, consume fresh water amount increasing, while a large amount of valuable Freshwater resources of consumption, oil field at home enters ultra-high water cut stage, produces again a large amount of oil field extracted water in Oil extraction process.Traditional way is by oil field extracted water after treatment, whole displacement of reservoir oil by filling water or be recycled into stratum, substantially outer row.But each elephant of China mostly enters the intermediary and later stages of oilfield construction at present, for improving oil recovery rate, along with the use of the technology such as thermal recovery, polymer injection oil recovery, the oil field produced water-content of part is up to more than 90%, make residue sewage quantity increasing, most of waste water needs outer row.Recovered water, after repeatedly recycling, has following characteristics: the water yield is large, suspension object height, salinity are high, hardness high.And thermal recovery, polymer injection recover the oil need supplementary a large amount of de-mineralized water and fresh water, therefore, the problem of oil field produced water handling reclamation seems particularly important.
At present, sewage mainly designs re-injection underground by treatment Technology for Petroleum Water Flooding after treatment, the main purpose of sewage disposal carries out the displacement of reservoir oil for re-injection underground, processing target is the principal pollutant oil removed in sewage, suspended substance and have the microorganism of corrosive nature and fouling tendency and metal ion etc. to pipeline, equipment, the treatment process adopted is based on Physical and physico-chemical process, and majority adopts oil removal-coagulation or precipitation-filtration three sections for the treatment of process.In recent years, begin one's study and use the method such as hydrocyclone, flotation, also unit equipment improved and study, to improve the process of its processing efficiency and adaptation polymer flooding recovered water, the various new treatment facilities such as transverse flow oil separator, double-layer filter material hay tank, suspended sludge bed filter, fine filter are there is.In processing technological flow, progressively the treatment scheme of gravity filtration being changed into the treatment scheme of filtering under pressure, sometimes in order to improve the treating depth of sewage, adopting two-stage filtration, even three-stage filtration.But due to three oil recoveries, above-mentioned processing technological flow is difficult to effectively control the oil in water outlet and suspension content, and the processing technological flow that oil field produced water treatment generally uses can not adapt to the demand of sewage standard discharge and re-injection.
The method for treating water cut out from oil field that present oil field is commonly used for add weighting agent, degreaser, flocculation agent and coagulant aids to process in recovered water; Technique adopts tube settler usually.
Weighting agent is generally ground barium sulfate, powdered iron ore etc., and the object adding weighting agent helps solve flco to kick the beam and cannot sedimentation, but shortcoming to be dosage large, cost is high, water body containing weighting agent is arranged outward or reuse has impact to surrounding enviroment and equipment installation.
All be provided with waste-oil scavenger in existing technique, technique and design all comparative maturities, execute-in-place is effective, and one-step installation can use continuously, the on-the-spot monitoring containing oil index can be met, and degreaser cost is higher, need manually make up a prescription and control dosing, use comparatively loaded down with trivial details;
Flocculation agent now conventional on market and coagulant aids are respectively poly aluminium chloride (PAC) and polyacrylamide (PAM), in general sewage disposal, effect is better, but for high saliferous, the sewage of high suspended matter, though PAC and PAM also can play flocculation and help solidifying effect, but because the own wt of the flco formed is lighter, sedimentation is made to become difficulty, and general requirement flco is decline state on oil field, the needs of site technique could be met, PAC and PAM dissolves also comparatively difficulty when weather is colder, need to increase dissolution time or improve water temperature just can reach requirement, which increase operation easier and cost, and one to being produce as master on oil field, and it is stricter to the control ratio of cost, so above-mentioned conventional treatment method can not meet the demands.
Summary of the invention
The object of the invention is: the product provided is specially adapted to the process of oil field extracted water, the most outstanding advantage when higher saltiness and suspended substance, can have good treatment effect.
The object of the present invention is achieved like this:
A kind of oil field extracted water treatment agent of the present invention, filling a prescription is: polyurethane 10 parts, trade effluent coagulant special 20 parts (principal constituent aluminium sesquioxide content is 26%-30%), 70 parts, water are raw material.Compound method of the present invention is, adds polyurethane 10g in beaker, 40g water, is stirred to polyurethane and melts, be evenly distributed in water; Slowly add trade effluent coagulant special 20g along walls of beaker, then add water 30g, be at room temperature stirred to and mix completely.
The raw material of the present invention's preparation: polyurethane content is 45%-55%; In trade effluent coagulant special, aluminium sesquioxide content is 26%-30%, and the manufacturer of trade effluent coagulant special is sesame Tian Yuzhou chemical plant, Gongyi City.
A kind for the treatment of process processing oil field extracted water, in oil field extracted water, stir 1% aqueous solution dropping into a kind of oil field extracted water treatment agent described in claim 1, dosage is 120mg--180mg/L, stirs 2-3min, leave standstill 10-15min, observe water outlet and measure physical and chemical index.
Product of the present invention has flocculation concurrently and helps solidifying effect, is the mixture of two kinds of medicaments, is suitable for the process of oil field height saliferous, high suspended matter recovered water, even if under lower usage quantity and lower service temperature, also can produce good control to recovered water; Simple to operate, dosage is little, and raw materials used be all commercially available prod, can buy, save synthetic cost; Solve large, the alkaline flood matter of water hardness drawback rambunctious simultaneously, for water body re-injection provides good condition, show technical progress.
A kind of oil field extracted water treatment agent of the present invention, only need add a kind of medicament, need the drawback adding various medicaments in conventional treatment method of forgoing.This kind of medicament has flocculation concurrently and helps solidifying effect, has absorption and bridging action preferably, has good adsorption-condensation, thus make water outlet limpid to suspended substance; The flco formed is large and weigh, and settlement is very fast, eliminates adding of weighting agent, can meet the processing requirements to recovered water on oil field.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
The raw material that embodiments of the invention adopt is: the manufacturer of polyurethane is Xi'an Wo Yu Chemical Co., Ltd., and content is 50%; The manufacturer of trade effluent coagulant special is sesame Tian Yuzhou chemical plant, Gongyi City, and main content is 28%.
Embodiment
The test and repair of product of the present invention:
(1) prepare: in beaker, add polyurethane 10g, 40g water, be placed on the magnetic stirring apparatus with rotor and be stirred to polyurethane thawing, be evenly distributed in water; Slowly add trade effluent coagulant special 20g along walls of beaker, then add water 30g, be at room temperature stirred to and mix completely, both obtain finished product.
(2) test method
Get test water 100ml in beaker, be placed on the magnetic stirring apparatus with rotor, open and stir; Under whipped state, medicaments different to (1% aqueous solution) for preparing is added successively according to different dosages, stop stirring the rear 10-15min of leaving standstill and observe water outlet and flco situation, get supernatant liquor and detect specific conductivity (need not filter), and in this, as basis for estimation.
Above-mentioned treatment agent is mixed with the aqueous solution of 1% concentration, detects its performance.
Test water takes from the water outlet of Shanshan joint station triphase separator, and water-quality guideline is as table 1:
Table 1 water quality detection result
| Sequence number | Test item | Result |
| 1 | Outward appearance | Cloudy grey liquid, the visible suspended substance of naked eyes |
| 2 | PH | 7.5-8.5 |
| 3 | Specific conductivity, us/cm | 10000 |
| 4 | Calcium ion, mg/L | 785.5 |
| 5 | Magnesium ion, mg/L | 243.7 |
As can be seen from the above table, in this water, saltiness is higher, if directly re-injection, can produce corrosion, cause potential safety hazard to pipeline and equipment, therefore will by reuse again after produced water disposal.
Table 2 is the simultaneous test of product of the present invention and several conventional medicament:
Table 2 different agents simultaneous test (1)
Note: PAC is high-purity, PAC expects thoroughly, PAC batch mixing and PAM are conventional medicament in water treatment procedure, commercially available prod.(Chinese character of PAC suffix represents different models, and represent the difference of aluminium sesquioxide content in PAC, this is general expression form in industry.)
Drawn by table 2: in identical dosage situation, product of the present invention has obvious treatment effect; And only need add a kind of medicament, easy to use.
Table 3 is the test effect data of the different dosage for the treatment of agent of the present invention:
Table 3 treatment agent dosage test of the present invention
Drawn by table 3: when product dosage of the present invention is 120mg--180mg/L, flco, water outlet situation and specific conductivity can reach re-injection requirement; But consider economy and running cost, during onsite application, dosage is 150mg/L best results.
The dosage of various medicament is unified, for 150mg/L, compare at identical conditions, the results are shown in Table 4:
The simultaneous test (2) of table 4 different agents
Drawn by upper table: when unified dosage, test water, product of the present invention is compared to commercially available conventional product and has larger advantage, and specific conductivity is removed the highest, and water outlet is limpid, meets on-the-spot reuse requirement.
Claims (2)
1. an oil field extracted water treatment agent, is characterized in that, fills a prescription to be: polyurethane 10 parts, trade effluent coagulant special 20 parts (principal constituent aluminium sesquioxide content is 26%-30%), 70 parts, water.
2. one kind processes the treatment process of oil field extracted water, it is characterized in that, in oil field extracted water, stir 1% aqueous solution dropping into a kind of oil field extracted water treatment agent described in claim 1, the dosage for the treatment of agent is 120mg--180mg/L, churning time 2-3min, leaves standstill 10-15min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510746288.1A CN105217761A (en) | 2015-11-05 | 2015-11-05 | A kind of oil field extracted water treatment agent |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510746288.1A CN105217761A (en) | 2015-11-05 | 2015-11-05 | A kind of oil field extracted water treatment agent |
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| CN105217761A true CN105217761A (en) | 2016-01-06 |
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| CN201510746288.1A Pending CN105217761A (en) | 2015-11-05 | 2015-11-05 | A kind of oil field extracted water treatment agent |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1216751A (en) * | 1998-09-15 | 1999-05-19 | 中国科学院生态环境研究中心 | Coagulation method for treating oil prodn. waste water of oil field polymers |
| JP2002153887A (en) * | 2000-11-21 | 2002-05-28 | Masao Ukisho | Water treatment method and water treatment equipment using this method |
| CN1648063A (en) * | 2004-12-21 | 2005-08-03 | 李迎来 | Mixed flocculant for treating waste water containing oil |
| CN104370354A (en) * | 2013-08-12 | 2015-02-25 | 赵明贵 | High efficient compounded flocculant for processing water body |
-
2015
- 2015-11-05 CN CN201510746288.1A patent/CN105217761A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1216751A (en) * | 1998-09-15 | 1999-05-19 | 中国科学院生态环境研究中心 | Coagulation method for treating oil prodn. waste water of oil field polymers |
| JP2002153887A (en) * | 2000-11-21 | 2002-05-28 | Masao Ukisho | Water treatment method and water treatment equipment using this method |
| CN1648063A (en) * | 2004-12-21 | 2005-08-03 | 李迎来 | Mixed flocculant for treating waste water containing oil |
| CN104370354A (en) * | 2013-08-12 | 2015-02-25 | 赵明贵 | High efficient compounded flocculant for processing water body |
Non-Patent Citations (1)
| Title |
|---|
| 唐少宇等: "絮凝沉淀-吸附两步法预处理松节油加工废水", 《工业用水与废水》 * |
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Application publication date: 20160106 |