CN104086014A - High-standard water injection refined filtration treatment process of offshore low-permeability oil field - Google Patents
High-standard water injection refined filtration treatment process of offshore low-permeability oil field Download PDFInfo
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- CN104086014A CN104086014A CN201410366109.7A CN201410366109A CN104086014A CN 104086014 A CN104086014 A CN 104086014A CN 201410366109 A CN201410366109 A CN 201410366109A CN 104086014 A CN104086014 A CN 104086014A
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Abstract
The invention discloses a high-standard water injection refined filtration treatment process of an offshore low-permeability oil field. The process comprises the following steps: firstly, inputting production wastewater into a conventional purification device for conventional process treatment to remove a large quantity of suspended matters of oil and relatively large particles; secondly, filtering the water treated by the conventional purification device in a modified fiber ball filter, and preprocessing; thirdly, further filtering the water treated by the modified fiber ball filter in a modified inorganic ultrafiltration membrane; fourthly, after produced water of the modified inorganic ultrafiltration membrane meets water injection requirements, inputting ultrafiltered water into a produced water tank, and recovering produced thick water to a wastewater collection tank; then, pressurizing the wastewater entering the wastewater collection tank by virtue of a wastewater pressurizing pump, and returning to a conventional water treatment process. According to the process, the water injection quality standard of the offshore low-permeability oil field can be met; relatively few lands are occupied by equipment, no pollution is generated, and the equipment is very easily arranged on an offshore oil extraction platform; meanwhile, the operation workload is relatively low and application prospect is good.
Description
Technical field
The present invention relates to sewage treatment process, relate in particular to a kind of marine low permeability oil field high standard water filling essence filter treatment process that is applicable to.Belong to offshore production platform production waste processing technology field.
Background technology
Offshore production platform production waste is mainly to follow crude oil from the local water of stratum output, has two kinds of processing modes: the one, and process rear row up to standard sea and discard; The 2nd, needing the oil reservoir of waterflooding, production water treatment is reached back after injectivity index to reinjection into reservoir.Wherein, re-injection mode both can make full use of sewage, improved crude production rate, can cause environmental pollution in the row of avoiding sea again, was a kind of processing scheme of environmental protection.
It is generally SY/T 5329 < < petroclastic rock reservoir water water quality fertilizer indexes and analytical procedure > > B3 level (that is: in water, oleaginousness, suspension content and particle intermediate value reach respectively 15mg/L, 5mg/L and 3 μ m) that ocean platform is produced the conventional re-injection water-quality guideline of water, water treatment process generally: inclined plate grease device+air supporting selector switch+nut-shell filter+bis-media filter old process.And for some marine water injection in low-permeability oilfield well, injection water quality index must reach A2 level (that is: in water, oleaginousness, suspension content and particle intermediate value reach respectively 6mg/L, 2mg/L and 1.5 μ m).Therefore conventional processing flow process cannot meet the requirement of hyposmosis well injection water quality.
So far, for marine water injection in low-permeability oilfield, process, there is no effective technical process.And the treatment process of land low permeability oil field, treatment process such as the microbiological deterioration of mentioning in some documents and patent, catalytic oxidation, settling tank, because treatment facility is huge, need occupy larger space; And, because equipment is heavy, on production vessel, arrange very difficult at sea; Therefore, economy is poor.
Summary of the invention
Main purpose of the present invention is to overcome the above-mentioned shortcoming that prior art exists, and provide a kind of marine low permeability oil field high standard water filling essence to filter treatment process, its treatment scheme is comparatively simple, and water quality after treatment not only can meet marine water injection in low-permeability oilfield water quality standard; And equipment takes up an area less, pollution-free, at sea on production vessel, be easy to arrange; Meanwhile, operation element amount is less, has good application prospect.
The object of the invention is to be realized by following technical scheme:
A marine low permeability oil field high standard water filling essence filter treatment process, is characterized in that: adopt following steps:
The first step: production waste is inputted to conventional refining plant and carry out old process processing, in order to remove more oils and the suspended substance of larger particles;
Second step: will enter modified fiber ball filter through conventional refining plant treated water and filter, and carry out pre-treatment;
The 3rd step: will enter modified inorganic ultra-filtration membrane through modified fiber ball filter treated water and do further to filter;
The 4th step: modified inorganic ultra-filtration membrane produces water and meets after waterflooding requirement, ultrafiltration water is inputed to and is produced in water pot, and the dense water of output is recycled in sewage collecting tank; Then, by entering sewage in holding tank in the supercharging of boosting pump, get back to conventional water treatment process.
Described modified inorganic ultra-filtration membrane adopts circulation and cross flow filter operation scheme, and the crossflow velocity of modified inorganic ultra-filtration membrane is 5m/s.
Described modified inorganic ultra-filtration membrane every 1h with the water of modified inorganic ultra-filtration membrane output by the backwash of modified inorganic ultra-filtration membrane once; Every through 7 days, modified inorganic ultra-filtration membrane is carried out to matting once.
Described matting is: pickling after first alkali cleaning, scavenging solution is: the sodium hydroxide of 0.01mol/L and hydrochloric acid soln.
In described the 4th step, the soda acid discharge opeing that modified inorganic ultra-filtration membrane clean to produce through soda acid be first recycled in neutralization tank and after, through topping-up pump supercharging, enter in sewage collecting tank, then through pump supercharging, get back to conventional water treatment process together with other enter the sewage in sewage collecting tank.
A kind of for realizing the marine low permeability oil field high standard water filling essence filter treatment unit of above-mentioned treatment process, comprise: conventional refining plant, it is characterized in that: the pipeline that passes through of this routine refining plant is connected with modified fiber ball filter, modified inorganic ultra-filtration membrane successively, wherein, modified inorganic ultra-filtration membrane is connected with sewage collecting tank, neutralization tank, product water pot respectively, and the dense water of output is recycled in sewage collecting tank; Meanwhile, the soda acid discharge opeing that soda acid clean is produced be first recycled in neutralization tank and after, then enter sewage collecting tank through topping-up pump supercharging, sewage collecting tank is connected with conventional refining plant again, and forms a waste disposal plant.
Described conventional refining plant: comprising: inclined plate grease device, the air supporting selector switch being connected successively with inclined plate grease device, nut-shell filter, two media filter.
Producing water pot is connected with waterflood pump.
Between described sewage collecting tank and conventional refining plant, be provided with boosting pump.
Between described product water pot and modified fiber ball filter, modified inorganic ultra-filtration membrane, be provided with cleaning service pump.
Beneficial effect of the present invention: the present invention is owing to adopting technique scheme, and its treatment scheme is comparatively simple, and water quality after treatment not only can meet marine water injection in low-permeability oilfield water quality standard; And equipment takes up an area less, pollution-free, at sea on production vessel, be easy to arrange; Meanwhile, operation element amount is less, has good application prospect.
Accompanying drawing explanation
Fig. 1 is water treatment process schematic diagram of the present invention.
Major label description in figure:
Conventional refining plant, 11. inclined plate grease devices, 12. air supporting selector switchs, 13. nut-shell filters, the 14. pairs of media filter, 2. modified fiber ball filter, 3. modified inorganic ultra-filtration membrane, 4. sewage collecting tank, 5. neutralization tank, 6. produce water pot, 61. waterflood pumps, 7. topping-up pump, 8. clean service pump, 9. boosting pump.
Embodiment
As shown in Figure 1, the present invention includes: the pipeline that passes through of conventional refining plant 1, this routine refining plant 1 is connected with modified fiber ball filter 2, modified inorganic ultra-filtration membrane 3 successively, wherein, modified inorganic ultra-filtration membrane 3 is connected with sewage collecting tank 4, neutralization tank 5, product water pot 6 respectively, the dense water of output is recycled in sewage collecting tank 4, meanwhile, the soda acid discharge opeing that soda acid clean is produced be first recycled in neutralization tank 5 and after, through topping-up pump 7 superchargings, enter sewage collecting tank 4; Sewage collecting tank 4 is connected with conventional refining plant 1 again, and forms a waste disposal plant.
Above-mentioned conventional refining plant 1: comprising: inclined plate grease device 11, the air supporting selector switch 12 being connected successively with inclined plate grease device, nut-shell filter 13, two media filter 14.
The filtrate of above-mentioned modified fiber ball filter 2 is: through the fibrous nodules of hydrophilic oleophobic modification, filtering velocity is: 15～20m/h.
The mineral membrane that above-mentioned modified inorganic ultra-filtration membrane 3 adopts through hydrophilic oleophobic modification.
Between above-mentioned sewage collecting tank 4 and conventional refining plant 1, be provided with boosting pump 9.
Above-mentioned product water pot 6 is connected with waterflood pump 61.
Between above-mentioned product water pot 6 and modified fiber ball filter 2, modified inorganic ultra-filtration membrane 3, be provided with and clean service pump 8.
The present invention adopts following steps:
The first step: production waste is inputted to conventional refining plant 1 and carry out old process processing, in order to remove more oils and the suspended substance of larger particles;
Second step: the B3 level water of processing through conventional refining plant 1 is entered to modified fiber ball filter 2 by pipeline and filter, carry out pre-treatment, to guarantee into film water matter;
The 3rd step: will enter modified inorganic ultra-filtration membrane 3 through modified fiber ball filter 2 treated waters and do further to filter, and input to storage in product water pot 6;
The 4th step: modified inorganic ultra-filtration membrane 3 produces water and meets after A2 level waterflooding requirement, and the dense water of output is recycled to sewage collecting tank 4, meanwhile, cleans by soda acid the soda acid discharge opeing producing and is first recycled to neutralization tank 5 neutralizations, then enter sewage collecting tank 4 through topping-up pump 7 superchargings; Then, then together with other enter the sewage in sewage collecting tank after 9 superchargings of boosting pump, get back to conventional water treatment process.Wherein, modified inorganic ultra-filtration membrane 3 adopts circulation and cross flow filter operation scheme, and the crossflow velocity of modified inorganic ultra-filtration membrane 3 is 5m/s; Modified inorganic ultra-filtration membrane 3 every 1h with the water of modified inorganic ultra-filtration membrane 3 outputs by modified inorganic ultra-filtration membrane 3 through cleaning service pump 8 backwashes once; Every through 7 days, 3 groups of modified inorganic ultra-filtration membranes carry out matting once, soak after 0.5h, then rinse with the water of modified inorganic ultra-filtration membrane 3 outputs with scavenging solution.Matting is: pickling after first alkali cleaning, scavenging solution is: the sodium hydroxide of 0.01mol/L and hydrochloric acid soln.
Above-mentioned inclined plate grease device, with inclined plate grease device, air supporting selector switch, nut-shell filter, two media filter, modified fiber ball filter, modified inorganic ultra-filtration membrane be prior art, the technology of not specified (NS) is prior art.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, any simple modification, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. marine low permeability oil field high standard water filling essence is filtered a treatment process, it is characterized in that: adopt following steps:
The first step: production waste is inputted to conventional refining plant and carry out old process processing, in order to remove more oils and the suspended substance of larger particles;
Second step: will enter modified fiber ball filter through conventional refining plant treated water and filter, and carry out pre-treatment;
The 3rd step: will enter modified inorganic ultra-filtration membrane through modified fiber ball filter treated water and do further to filter;
The 4th step: modified inorganic ultra-filtration membrane produces water and meets after waterflooding requirement, ultrafiltration water is inputed to and is produced in water pot, and the dense water of output is recycled in sewage collecting tank; Then, by entering sewage in holding tank in the supercharging of boosting pump, get back to conventional water treatment process.
2. marine low permeability oil field high standard water filling essence filter treatment process according to claim 1, is characterized in that: described modified inorganic ultra-filtration membrane adopts circulation and cross flow filter operation scheme, and the crossflow velocity of modified inorganic ultra-filtration membrane is 5m/s.
3. marine low permeability oil field high standard water filling essence filter treatment process according to claim 1 and 2, is characterized in that: described modified inorganic ultra-filtration membrane every 1h with the water of modified inorganic ultra-filtration membrane output by the backwash of modified inorganic ultra-filtration membrane once; Every through 7 days, modified inorganic ultra-filtration membrane is carried out to matting once.
4. marine low permeability oil field high standard water filling essence filter treatment process according to claim 3, is characterized in that: described matting is: pickling after first alkali cleaning, scavenging solution is: the sodium hydroxide of 0.01mol/L and hydrochloric acid soln.
5. marine low permeability oil field high standard water filling essence according to claim 1 is filtered treatment process, it is characterized in that: in described the 4th step, the soda acid discharge opeing that modified inorganic ultra-filtration membrane clean to produce through soda acid be first recycled in neutralization tank and after, through topping-up pump supercharging, enter in sewage collecting tank, then through pump supercharging, get back to conventional water treatment process together with other enter the sewage in sewage collecting tank.
6. for realizing the marine low permeability oil field high standard water filling essence of above-mentioned treatment process, filter treatment unit for one kind, comprise: conventional refining plant, it is characterized in that: the pipeline that passes through of this routine refining plant is connected with modified fiber ball filter, modified inorganic ultra-filtration membrane successively, wherein, modified inorganic ultra-filtration membrane is connected with sewage collecting tank, neutralization tank, product water pot respectively, and the dense water of output is recycled in sewage collecting tank; Meanwhile, the soda acid discharge opeing that soda acid clean is produced be first recycled in neutralization tank and after, then enter sewage collecting tank through topping-up pump supercharging, sewage collecting tank is connected with conventional refining plant again, and forms a waste disposal plant.
7. marine low permeability oil field high standard water filling essence filter treatment unit according to claim 6, is characterized in that: described conventional refining plant: comprising: inclined plate grease device, the air supporting selector switch being connected successively with inclined plate grease device, nut-shell filter, two media filter.
8. marine low permeability oil field high standard water filling essence filter treatment unit according to claim 6, is characterized in that: produce water pot and be connected with waterflood pump.
9. marine low permeability oil field high standard water filling essence filter treatment unit according to claim 6, is characterized in that: between described sewage collecting tank and conventional refining plant, be provided with boosting pump.
10. marine low permeability oil field high standard water filling essence filter treatment unit according to claim 6, is characterized in that: between described product water pot and modified fiber ball filter, modified inorganic ultra-filtration membrane, be provided with cleaning service pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410366109.7A CN104086014A (en) | 2014-07-29 | 2014-07-29 | High-standard water injection refined filtration treatment process of offshore low-permeability oil field |
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| CN201410366109.7A CN104086014A (en) | 2014-07-29 | 2014-07-29 | High-standard water injection refined filtration treatment process of offshore low-permeability oil field |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105800736A (en) * | 2016-04-27 | 2016-07-27 | 浙江净源膜科技股份有限公司 | High-efficiency treatment method and high-efficiency treatment device for oil-containing wastewater |
| CN108975546A (en) * | 2018-09-25 | 2018-12-11 | 浙江金龙自控设备有限公司 | A kind of high temperature water filling fine filtration device |
| CN116040739A (en) * | 2022-12-08 | 2023-05-02 | 海洋石油工程股份有限公司 | Standardized treatment flow of offshore platform oily sewage treatment unit |
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| CN102040310A (en) * | 2009-10-20 | 2011-05-04 | 北京纬纶华业环保科技股份有限公司 | Sewage treatment method for reinjection of produced water from oil field to low-permeability oil field |
| CN102225812A (en) * | 2011-04-22 | 2011-10-26 | 江苏久吾高科技股份有限公司 | Membrane treatment process for oilfield reinjection water |
| CN202766375U (en) * | 2012-09-20 | 2013-03-06 | 北京东晟世纪科技有限公司 | Seawater treatment system for water injection source of offshore oilfield |
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2014
- 2014-07-29 CN CN201410366109.7A patent/CN104086014A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040310A (en) * | 2009-10-20 | 2011-05-04 | 北京纬纶华业环保科技股份有限公司 | Sewage treatment method for reinjection of produced water from oil field to low-permeability oil field |
| CN102225812A (en) * | 2011-04-22 | 2011-10-26 | 江苏久吾高科技股份有限公司 | Membrane treatment process for oilfield reinjection water |
| CN202766375U (en) * | 2012-09-20 | 2013-03-06 | 北京东晟世纪科技有限公司 | Seawater treatment system for water injection source of offshore oilfield |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105800736A (en) * | 2016-04-27 | 2016-07-27 | 浙江净源膜科技股份有限公司 | High-efficiency treatment method and high-efficiency treatment device for oil-containing wastewater |
| CN108975546A (en) * | 2018-09-25 | 2018-12-11 | 浙江金龙自控设备有限公司 | A kind of high temperature water filling fine filtration device |
| CN116040739A (en) * | 2022-12-08 | 2023-05-02 | 海洋石油工程股份有限公司 | Standardized treatment flow of offshore platform oily sewage treatment unit |
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Application publication date: 20141008 |