CN102515309A - Pipeline oil removing process for oilfield produced water - Google Patents
Pipeline oil removing process for oilfield produced water Download PDFInfo
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- CN102515309A CN102515309A CN2011104433380A CN201110443338A CN102515309A CN 102515309 A CN102515309 A CN 102515309A CN 2011104433380 A CN2011104433380 A CN 2011104433380A CN 201110443338 A CN201110443338 A CN 201110443338A CN 102515309 A CN102515309 A CN 102515309A
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Abstract
The invention relates to a pipeline oil removing process for oilfield produced water, and a pipeline oil removing device which is matched with the pipeline oil removing process for the oilfield produced water and consists of a pipeline. The equivalent diameter of the pipeline is 200 to 500mm, and the length of the pipeline is 1.4 to 13km; after entering the pipeline oil removing device, the produced water flows to an outlet of the pipeline oil removing device at flow velocity of 0.1 to 0.3m/s; at the outlet end of the pipeline oil removing device, an oil layer and a water layer are discharged from the upper end and the lower end of the pipeline oil removing device respectively; and water which is separated out enters a produced water treatment facility at the tail end of the pipeline oil removing device. By the process, high-viscosity chemical-flooding produced water can be subjected to oil and water separation effectively, the oil content of inlet water in a filtering process is reduced, and chemical-flooding produced water is reinjected under the condition of meeting the standard.
Description
Technical field
The present invention relates to the purifying treatment of oil field extracted water, especially polymer flooding, alkali, surfactant and polymer drive the HV extraction water purification oil removal treatment that (ternary composite driving) and surfactant and polymer such as drive at the chemical flooding output.
Background technology
Polymer flooding, alkali, surfactant and polymer drive (ternary composite driving) and surfactant and polymer and the chemical flooding technology such as drive and at home oil field obtained industrial applications in recent years.When increasing substantially oil recovery factor and improving crude production rate; The alkali, tensio-active agent and the polymkeric substance that inject liquid also cause the increase of recovered water oleaginousness, oil droplet coalescence and separating difficulty to strengthen; Especially the polymkeric substance in the recovered water is prone to cause recovered water viscosity to rise significantly, even has YV and be transformed into plastic fluid.The increase of recovered water viscosity; Significantly reduced the buoyance lift speed of oil droplet in recovered water; Make big jar of (skimming tank) sedimentation process oil removal efficiency that generally adopts in the oil field produced water treatment descend significantly; Cause slurry tank water outlet oleaginousness to rise significantly, increased the burden of follow-up filtration operation, finally cause filtering the pollution with oil reservoir that exceeds standard of back re-injection recovered water oleaginousness.
Summary of the invention
In order to solve the problem that exists in the background technology; The present invention provides a kind of suitable polymer flooding, alkali, surfactant and polymer to drive the oil removing process that (ternary composite driving) and surfactant and polymer such as drive at the HV recovered water water quality characteristic of chemical flooding extraction; Thereby realize effective oily water separation of HV chemical flooding recovered water; Reduce the oleaginousness of filtering the operation water inlet, realize the re-injection up to standard of chemical flooding recovered water.
The technical scheme that the present invention adopted is: this technology is made up of the pipeline oil eliminator that the pipeline oil removal treatment technology and the supporting with it pipeline of oil field extracted water constitutes; Wherein the equivalent diameter of pipeline is 200 mm～500mm; Length is 1.4～13km; Recovered water gets into behind the pipeline oil eliminator outlet with the flow rate and direction pipeline oil eliminator of 0.1m～0.3m/s; The fluidised form of recovered water is laminar flow regime or transition flow regime in the pipeline oil eliminator; Oil droplet under this fluidised form in recovered water buoyance lift and finally coalescence takes place and form oil reservoir upwards under buoyancy at pipeline upper wall surface place and side wall surface place, thus effective removal and the profit of realizing oil droplet in the recovered water are separated, at pipeline oil eliminator exit end oil reservoir and water layer respectively from the top and bottom discharge of pipeline oil eliminator.Isolated water gets into the terminal produced water disposal facility of pipeline oil eliminator.
In such scheme:
(1) floats to the pipeline upper wall surface on the oil droplet in the recovered water and form the distance of oil reservoir or the required buoyance lift of oil film short (< 500mm); And according to " shallow pool theory " of Hazen; Oil droplet come-up distance is short more, identical separation under the time size of removable oil droplet more little, oil removal efficiency is high more.
(2) high-viscosity polymer drives, alkali, surfactant and polymer drives (ternary composite driving) and surfactant and polymer and the chemical flooding recovered water such as drive for having viscoelastic polymers soln; Be pseudoplastic fluid or plastic fluid; Has significant shear shinning characteristic; Recovered water can significantly reduce its AV in ducted axial horizontal flow, reduces the resistance of oil droplet come-up, thereby quickens the come-up of oil droplet.
(3) high-viscosity polymer drives, alkali, surfactant and polymer drives the high molecular weight polymkeric substance that (ternary composite driving) and surfactant and polymer drive etc. in the chemical flooding recovered water and can effectively suppress the turbulent flow in the current; It is regional with transition flow significantly to enlarge recovered water mobile laminar flow in pipeline, avoids turbulization in pipeline and disturbs the come-up of oil droplet.
Beneficial effect of the present invention: compare with big jar of (skimming tank) sedimentation oil removing process of widespread usage in the oil field produced water treatment; It is vertical with water (flow) direction thereby receive the flow interference little that oil field produced waterpipe oil removal treatment technology among the present invention has oil droplet come-up direction; Oil droplet come-up distance is short; Little and the oil removal efficiency advantages of higher of oil droplet come-up resistance; Can be used to substitute big jar of (skimming tank) sedimentation oil removing process as high-viscosity polymer drive, to drive that (ternary composite driving) and surfactant and polymer the main oil removing process of chemical flooding recovered water such as drive or place big jar (skimming tank) sedimentation oil removing process previous crops be pretreatment technology to alkali, surfactant and polymer; With significantly improve that high-viscosity polymer drives, alkali, surfactant and polymer drives the sedimentation deoiling effect that (ternary composite driving) and surfactant and polymer such as drive at the chemical flooding recovered water; Improve the influent quality of follow-up filtration operation, improve the water quality of handling back re-injection recovered water.In addition, other utilizes the sedimentation oil removing process of shallow pool theory to compare with the swash plate oil eliminator technology of using in the oil field produced water treatment etc., and the pipeline oil removal treatment technology among the present invention has simple structure, anti-alluvial ability is strong and be convenient to advantage such as desilting.Also can the pipeline oil eliminator be used as the transport pipe of recovered water in some cases, have and carry and the separation of double function.
Oil field produced waterpipe oil removal treatment technology among the present invention adopted in both can and having built in newly-built HV chemical flooding produced water disposal facilities design; Also can in the transformation of the oil field produced water processing establishment of having built, be used as the oil removing process of increase, make and build the produced water disposal facility through satisfying the needs of chemical flooding produced water disposal after transforming.
Embodiment:
In conjunction with embodiment the present invention is described further:
Embodiment 1,
Isolated alkali, surfactant and polymer drives (ternary composite driving) recovered water to get into diameter is 500mm in the field joint stations extraction liquid treatment facility, and length is the straight tube shape pipeline oil eliminator of 13km, and the end of pipeline oil eliminator is the produced water disposal facility.The flow velocity of recovered water in the pipeline oil eliminator is 0.3m/s, and the residence time is 12h.Terminal at the pipeline oil eliminator, recovered water is discharged surge tank before the filter that gets into water processing establishment from the lower end of pipeline oil eliminator, and the oil slick layer on pipeline oil eliminator top portion is from it discharged and got into the sump oil receiving tank.The oleaginousness that the alkali, surfactant and polymer that initial oleaginousness is 2802～3175mg/l drives after (ternary composite driving) recovered water is handled through pipeline oil removing process of the present invention can be reduced to 53～92mg/l, can satisfy the water quality requirement of follow-up filtration process water inlet.
Embodiment 2,
Isolated high-viscosity polymer drive water exit entering diameter is 400mm in the field joint stations extraction liquid treatment facility, and length is the snakelike tubular pipeline oil eliminator of 7.2km.The flow velocity of recovered water in the pipeline oil eliminator is 0.2m/s, and the residence time is 10h.Terminal at the pipeline oil eliminator, recovered water is discharged surge tank before the filter that gets into water processing establishment from the lower end of pipeline oil eliminator, and the oil slick layer on pipeline oil eliminator top portion is from it discharged and got into the sump oil receiving tank.Initial oleaginousness can satisfy the water quality requirement of follow-up filtration process water inlet for the oleaginousness after handling through pipeline oil removing process of the present invention less than the polymer flooding water of 1628～2057mg/l can be reduced to 41～87mg/l.
Embodiment 3,
Isolated high-viscosity polymer drive water exit entering diameter was 200mm during oil field commentaries on classics oil discharged water and stands, and length is the pipeline oil eliminator of the concentric(al) circles spiral raised shape of 1.4km.The flow velocity of recovered water in the pipeline oil eliminator is 0.1m/s, and the residence time is 3.9h.Terminal at the pipeline oil eliminator, recovered water is discharged surge tank before the filter that gets into water processing establishment from the lower end of pipeline oil eliminator, and the oil slick layer on pipeline oil eliminator top portion is from it discharged and got into the sump oil receiving tank.Oleaginousness after the polymer flooding water that initial oleaginousness is 537～829mg/l is handled through pipeline oil removing process of the present invention can be reduced to 41～95mg/l, can satisfy the water quality requirement of follow-up filtration process water inlet.
Claims (2)
1. oil field produced waterpipe oil removing process; The pipeline oil eliminator that constitutes by the pipeline oil removal treatment technology and the supporting with it pipeline of oil field extracted water; Wherein the equivalent diameter of pipeline is 200 mm～500mm; Length is 1.4～13km; Recovered water gets into behind the pipeline oil eliminator outlet with the flow rate and direction pipeline oil eliminator of 0.1m～0.3m/s, discharges from the top and bottom of pipeline oil eliminator respectively at pipeline oil eliminator exit end oil reservoir and water layer, and isolated water gets into the produced water disposal facility of pipeline oil eliminator end.
2. oil field produced waterpipe oil removing process according to claim 1 is characterized in that: pipeline is a kind of shape in straight length, concentric(al) circles, spiral, snakelike, Z font, the W type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104433380A CN102515309A (en) | 2011-12-27 | 2011-12-27 | Pipeline oil removing process for oilfield produced water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104433380A CN102515309A (en) | 2011-12-27 | 2011-12-27 | Pipeline oil removing process for oilfield produced water |
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| Publication Number | Publication Date |
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| CN102515309A true CN102515309A (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011104433380A Pending CN102515309A (en) | 2011-12-27 | 2011-12-27 | Pipeline oil removing process for oilfield produced water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495242A (en) * | 2016-11-04 | 2017-03-15 | 烟台史密得机电设备制造有限公司 | A kind of degreaser of salt tolerant polymer flooding water and preparation method thereof |
| CN113023914A (en) * | 2019-12-25 | 2021-06-25 | 大庆油田有限责任公司 | Oil-water separation treatment system and treatment method for oil field chemical flooding oil displacement produced water |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1130235A (en) * | 1995-02-28 | 1996-09-04 | 吉林省油田管理局钻采工艺研究院 | Oil/water separating method |
| CN101810941A (en) * | 2010-04-13 | 2010-08-25 | 中海石油(中国)有限公司深圳分公司 | Compound oil-water separation system |
-
2011
- 2011-12-27 CN CN2011104433380A patent/CN102515309A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1130235A (en) * | 1995-02-28 | 1996-09-04 | 吉林省油田管理局钻采工艺研究院 | Oil/water separating method |
| CN101810941A (en) * | 2010-04-13 | 2010-08-25 | 中海石油(中国)有限公司深圳分公司 | Compound oil-water separation system |
Non-Patent Citations (1)
| Title |
|---|
| 赵琼: "聚结除油-气浮-过滤工艺处理稠油污水", 《资源开发与市场》, vol. 27, no. 6, 30 June 2011 (2011-06-30), pages 500 - 502 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495242A (en) * | 2016-11-04 | 2017-03-15 | 烟台史密得机电设备制造有限公司 | A kind of degreaser of salt tolerant polymer flooding water and preparation method thereof |
| CN113023914A (en) * | 2019-12-25 | 2021-06-25 | 大庆油田有限责任公司 | Oil-water separation treatment system and treatment method for oil field chemical flooding oil displacement produced water |
| CN113023914B (en) * | 2019-12-25 | 2023-04-28 | 大庆油田有限责任公司 | Treatment system and treatment method for oil-water separation of oil-water produced by chemical flooding of oil field |
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Application publication date: 20120627 |