CN1128762C - Oil field sewage decontaminating method and apparatus - Google Patents
Oil field sewage decontaminating method and apparatus Download PDFInfo
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- CN1128762C CN1128762C CN 01141453 CN01141453A CN1128762C CN 1128762 C CN1128762 C CN 1128762C CN 01141453 CN01141453 CN 01141453 CN 01141453 A CN01141453 A CN 01141453A CN 1128762 C CN1128762 C CN 1128762C
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Abstract
The present invention relates to a method for removing impurities in sewage water of oilfields and a sewage water treating device. The present invention aims to provide a technology of a method for removing mechanical impurities in sewage water of oilfields and a sewage water treating device, which has the advantages of simple structure, easy and simple operation, high sand removing efficiency and high mechanical impurity removing efficiency. The technology comprises that: the oilfield sewage water treating device is arranged at any one point of the back flow path of an outlet of an outer sewage water supply pump of an oil transportation station and the front flow path of a water injecting pump of; the outer sewage water supply pump provides power to cause the oilfield sewage water with water-oil separation to have the flow speed of more than 5 meters per second and the pressure difference of more than 0.05MPa at the point of the oilfield sewage water treating device; the oilfield sewage water flows into a vortex conical cylinder in a tangential direction, and vortex is formed in the vortex conical cylinder; the oilfield sewage water with removed mechanical impurities and sand particles is outputted to utilize once again, and the separated mechanical impurities, the sand particles and a part of sewage water are discharged by a nozzle. The technology of the present invention is especially suitable for a production technology of a sandstone oil reservoir with high permeation and loose cementation.
Description
Technical field
The present invention relates to the method and the waste disposal plant of the removing processing of impurity in a kind of oilfield sewage.Specifically come liquid to carry out sewage after the oily water separation before re-injection to oil well, the energy that utilizes sewage to be had in course of conveying adopts the mode of centrifugation that the mechanical impurity contained in the sewage and the grains of sand are removed processing.It is specially adapted in the production practice of high infiltration, loose agglutinating sandstone oil reservoir.
Background technology
In oil extraction process, for height infiltration, loose agglutinating sandstone oil reservoir, shallow owing to burying, compacting effort is poor, and the stratum easily shakes out.Along with oil-field development enters high water-cut stage, for guaranteeing the stable yields in oil field, improve ultimate recovery factor, significantly improve the important measures that the production fluid amount is oil-field development.But because this class reservoir formation is under the effect of washing away, the grains of sand aggravation that comes off causes output liquid silt carrying capacity to improve constantly in the stratum, and sand production aggravates.On the other hand, after the operation long period, mix and carry out fouling under the effect of temperature, again under the effect of scouring force by machines such as the calcium ions and magnesium ions in the water at recycle system for sewage after output liquid is handled, occur degrading coming off, in sewage, form the mechanical impurity of larger particles shape.These impurity often cause waterflood pump to damage, hazardness results such as pipeline stops up, card water meter, obstruction stratum.
For solving this difficult problem, mainly in the prior art adopt natural sedimentation, filtering under pressure method, manually remove methods such as method and acid fracturing method and remove the above-mentioned mechanical impurity and the grains of sand.But natural sedimentation must be built at least two enough big containers, its cost of investment height; And because above-mentioned mechanical impurity and grains of sand natural subsidence in container need time enough to finish, thereby its inefficiency; Also having an important problem is the variation that this method can not monitor the amount of contained mechanical impurity and the grains of sand in the produced-water reinjection system, thereby and easily takes place to stop up accidents such as pipe network, water injection well tubing string and oil reservoir such as damaging water filling machinery.And the filtering under pressure method need be finished the work under certain pressure, needs configuration that the power system of pressure is provided like this, needs regular or irregular cleaning filter screen or filter plate thereby its working cost height simultaneously in operational process; Again because the restriction of its mode of operation, make it only be adapted to filtration to the less output liquid of mechanical impurity and grains of sand content.In addition, manually removing method and acid fracturing method mainly is to remove mediation at the obstruction that pipe network, water injection well tubing string and oil reservoir have taken place, these workers
The technology complexity, difficulty of construction is big, cost is high, uses chemical substance also can cause the pollution of environment sometimes.
On the other hand, all contain a certain amount of Sweet natural gas usually in processed oilfield sewage, all do not have this part Sweet natural gas is reclaimed in above-mentioned technology, above-mentioned part technology is also amplified Sweet natural gas wherein outward in the gas, and environment is polluted.
Summary of the invention
For this reason, the objective of the invention is to propose a kind of simple in structure, easy and simple to handle, and can improve desanding, remove method and waste disposal plant that the removing of impurity in the oilfield sewage of mechanical impurity efficient is handled.
Further purpose of the present invention is to collect in the process of the mechanical impurity in handling above-mentioned oilfield sewage and the grains of sand Sweet natural gas in the sewage, avoids its pollution to atmospheric environment.
For achieving the above object, the method that the removing of impurity is handled in the oilfield sewage of the present invention comprises:
-outside transfer station sewage for behind the pump outlet, any place of flow process is provided with the disposing polluted water in oil device before the waterflood pump;
-provide power for pump outward by sewage, oilfield sewage after the oily water separation is had at disposing polluted water in oil device place greater than the flow velocity of 5 meters of per seconds with greater than the pressure reduction of 0.05MPa, preferably the flow velocity of oilfield sewage is greater than 10 meters of per seconds;
-oilfield sewage is tangentially entered the rotating flow cone tube of disposing polluted water in oil device, make it in described rotating flow cone tube, form eddy flow;
-oilfield sewage the output that will remove behind the mechanical impurity and the grains of sand utilizes once more, and with isolated mechanical impurity, the grains of sand and part of contaminated water are discharged through the nozzle of disposing polluted water in oil device.
Further, the oilfield sewage of exporting in the aforesaid method is sent to the nothing motion rotation breechblock chamber of disposing polluted water in oil device, carry out gas-oil separation at this, and the input of the Sweet natural gas after will separating gas distributing system, and sewage liquid enters stable can in order to utilizing once more.
Further, at first enter the collection storage chamber of disposing polluted water in oil device through mechanical impurity, the grains of sand and the part of contaminated water of said nozzle ejection; Treat mechanical impurity, the grains of sand and part of contaminated water collection in the described collection storage chamber store up a certain amount of after, unified again being discharged in the pollution discharge pond; And then the mechanical impurity in the described pollution discharge pond, the grains of sand and part of contaminated water are transported to settling tank precipitate; At last the sewage transport after mechanical impurity and the grains of sand levigation is handled once more to the ingress of disposing polluted water in oil device.
For the disposing polluted water in oil device of realizing the object of the invention comprises: a up big and down small rotating flow cone tube, tangential direction on the top of described rotating flow cone tube along the circumference of awl tube is provided with an inlet duct, be provided with an overflow outlet on the top of described rotating flow cone tube, and be provided with a nozzle in the bottom of described rotating flow cone tube.Described nozzle has a hollow neck and at the expansion in described neck downstream, the internal diameter of described hollow neck is at 3 to 10 millimeters.
Separate for the remaining Sweet natural gas that will remove effectively in the oilfield sewage behind the mechanical impurity and the grains of sand, be provided with the breechblock chamber at above-mentioned overflow port.So that having adequate time to carry out liquid gas in the breechblock chamber, separates in sewage.
Because the ejecta of discharging from said nozzle still contains part of contaminated water, if directly discharging towards periphery will cause the waste of water resources utilization also must pollute environment simultaneously.Be provided with a collection storage chamber for this reason in the downstream of described nozzle, be provided with a wash water valve in the exit of described collection storage chamber.Described wash water valve links to each other with pollution discharge pond, settling tank by pipeline.
Technique scheme of the present invention has the following advantages compared to existing technology, adopts such scheme, and having need not any power-equipment, transports outside raw waste water under the capable form, and pressure of supply water is constant, can remove gas and mechanical impurity and sand grains in the sewage.Avoided prior art to need manually to carry out in a large number works of treatment such as jar work clearly and pipeline sand removal scale removal and formation acidizing, pressure break after to disposing polluted water in oil.Simultaneously, Sweet natural gas contained in the sewage can be recycled, and labor strength is low, and facility investment and running cost are also far below the equipment of prior art.Solve the fouling and the obstruction of well input horizon effectively, prolonged the operation work-ing life of waterflood pump and pipe network.
Description of drawings
In order to make the easier understanding that is eliminated of content of the present invention, below according to a particular embodiment of the invention and in conjunction with the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the synoptic diagram of a kind of best effort flow process of process for treating oil field sewage of the present invention;
Fig. 2 is the structural representation of disposing polluted water in oil device of the present invention core.
Embodiment
As shown in Figure 2, in the present embodiment, the disposing polluted water in oil device is a sledge-borne type structure, described device comprises the rotating flow cone tube 1 that a up big and down small state is provided with, tangential direction on the top of described rotating flow cone tube 1 along the circumference of awl tube is provided with an inlet duct 2, be provided with an overflow port 3 on the top of described rotating flow cone tube 1, be connected with a breechblock chamber 4, separate so that sewage has adequate time to carry out liquid gas in breechblock chamber 4 at above-mentioned overflow port 3; And being provided with a nozzle 5 in the bottom of described rotating flow cone tube 1, described nozzle 5 has a hollow neck 6 and at the expansion 7 in described neck downstream, the internal diameter of described hollow neck 6 is 3 to 10 millimeters.Be provided with a collection storage chamber 8 in the downstream of described nozzle 5, be provided with a wash water valve 9 in the exit of described collection storage chamber 8.Described wash water valve 9 links to each other with pollution discharge pond 10, settling tank 11 by pipeline.
Referring to Fig. 1 and Fig. 2, on any fragment position outside transfer station sewage before confession pump 12 backs, the waterflood pump 13 disposing polluted water in oil device of the present invention is set.The sewage that comes from the water supply network of front end distributor gears 14 with greater than the flow velocity of 5 meters of per seconds under pressure reduction greater than 0.05Mpa, enter with tangential direction in the above-mentioned rotating flow cone tube 1 through above-mentioned inlet duct 2, and form an eddy current of downward spiral motion at rotating flow cone tube 1, the bigger suspended solids of diameter and proportion wherein, comprise that the mechanical impurity and the grains of sand are thrown near the wall of container of cone 1 by centrifugal force, and in the thrust and the downslide of action of gravity lower edge wall of container of eddy flow downwards, and the nozzle 5 through cone 1 bottom is discharged to collection storage chamber 8, effluxes in this wait.Fluid (containing Sweet natural gas sewage) is then further under the rotating speed that increases gradually, eddy flow is to the bottom of cone 1, and form the excessive pressure that returns that makes progress along the axis of cone 1 at this and overflow at this and return under the effect of pressure, most of fluid change direction is upwards made the anti-doline of spiral by cone 1 bottom along axis and is moved, and forms the secondary eddy current.Fluid in the secondary eddy current enters nothing motion rotation breechblock chamber 4 through the overflow port 3 of cone 1 upper limb.In breechblock chamber 4, the Sweet natural gas of separating out in sewage enters outside total pipe network 15 defeated, and remaining sewage liquid enters stablizes storage tank 16, and arrives sewage waterflood pump 13 by stablizing storage tank 16, via the injection pipe network re-injection.Under action of centrifugal force, be split into heavier compositions such as the mechanical impurity of cone 1 bottom and sand grains, be discharged to collection storage chamber 8 by nozzle 5 and collect storage.Wait to collect when storing up certain amount, by manually opening wash water valve 9 according to certain rules, collection storing (containing mechanical impurity, sand grains and part of contaminated water) in the collection storage chamber 8 is entered pollution discharge pond 10, and be transported to settling tank 11 through pollution discharge pond 10, after wherein the sewage of Pai Chuing is waited to form sediment, reclaim by reclaiming the mutual recovery line 17 of pumping, mechanical impurity sand grains and other sedimentable matter are sent to solarization sand field and carry out environmental protection treatment.
The device of the above embodiment of the present invention can also be installed metering system, and metering and control detect the working condition of moving under the handled nominal operation carrying capacity of described device, according to institute's monitoring data optimum Working of setting device at any time.
Obviously, the above embodiment of the present invention only is for example of the present invention clearly is described, and is not to be qualification to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (8)
1. the method that the removing of impurity is handled in the oilfield sewage comprises:
-outside transfer station sewage for behind the pump outlet, the disposing polluted water in oil device is set among the flow process before the waterflood pump;
-provide power for pump outward by sewage, oilfield sewage after the oily water separation is had at disposing polluted water in oil device place greater than the flow velocity of 5 meters of per seconds with greater than the pressure reduction of 0.05MPa;
-oilfield sewage is tangentially entered the rotating flow cone tube of disposing polluted water in oil device, make it in described rotating flow cone tube, form eddy flow;
-oilfield sewage the output that will remove behind the mechanical impurity and the grains of sand utilizes once more, and isolated mechanical impurity, the grains of sand and part of contaminated water are discharged through the nozzle of disposing polluted water in oil device.
2. the method that the removing of impurity is handled in the oilfield sewage according to claim 1, it is characterized in that described oilfield sewage at the flow velocity at disposing polluted water in oil device place greater than 10 meters of per seconds.
3. the method that the removing of impurity is handled in the oilfield sewage according to claim 1, it is characterized in that the described nothing motion rotation breechblock chamber that the oilfield sewage of exporting behind the mechanical impurity and the grains of sand is sent to the disposing polluted water in oil device of removing, carrying out liquid gas at this separates, and the input of the Sweet natural gas after will separating gas distributing system, and sewage liquid enters stable can in order to utilizing once more.
4. the method that the removing of impurity is handled in the oilfield sewage according to claim 1 is characterized in that described mechanical impurity, the grains of sand and part of contaminated water through the said nozzle ejection at first enters the collection storage chamber of disposing polluted water in oil device; Treat mechanical impurity, the grains of sand and part of contaminated water collection in the described collection storage chamber store up a certain amount of after, unified again being discharged in the pollution discharge pond; And then the mechanical impurity in the described pollution discharge pond, the grains of sand and part of contaminated water are transported to settling tank precipitate; At last the sewage transport after mechanical impurity and the grains of sand levigation is handled once more to the ingress of disposing polluted water in oil device.
5. disposing polluted water in oil device, it is characterized in that comprising a up big and down small rotating flow cone tube, tangential direction on the top of described rotating flow cone tube along the circumference of awl tube is provided with an inlet duct, be provided with an overflow outlet on the top of described rotating flow cone tube, and be provided with a nozzle in the bottom of described rotating flow cone tube.
6. disposing polluted water in oil device according to claim 5 is characterized in that described nozzle has a hollow neck and at the expansion in described neck downstream, the internal diameter of described hollow neck is between 3 to 10 millimeters.
7. disposing polluted water in oil device according to claim 5 is characterized in that being provided with the breechblock chamber at above-mentioned overflow port, separates so that sewage has adequate time to carry out liquid gas in the breechblock chamber.
8. disposing polluted water in oil device according to claim 5 is characterized in that being provided with a collection storage chamber in the downstream of described nozzle, is provided with a wash water valve in the exit of described collection storage chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01141453 CN1128762C (en) | 2001-09-26 | 2001-09-26 | Oil field sewage decontaminating method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01141453 CN1128762C (en) | 2001-09-26 | 2001-09-26 | Oil field sewage decontaminating method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1337361A CN1337361A (en) | 2002-02-27 |
| CN1128762C true CN1128762C (en) | 2003-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01141453 Expired - Fee Related CN1128762C (en) | 2001-09-26 | 2001-09-26 | Oil field sewage decontaminating method and apparatus |
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| Country | Link |
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| CN (1) | CN1128762C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011124032A1 (en) * | 2010-04-09 | 2011-10-13 | 柏荣科技股份有限公司 | Purifying device for water quality and pipeline of water supply system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110734149B (en) * | 2018-07-18 | 2024-05-28 | 中国石油天然气股份有限公司 | Oilfield sewage treatment device |
| CN112588459A (en) * | 2020-11-26 | 2021-04-02 | 东北石油大学 | Deoiling and desanding rotational flow purification device for low-oil-content sewage |
-
2001
- 2001-09-26 CN CN 01141453 patent/CN1128762C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011124032A1 (en) * | 2010-04-09 | 2011-10-13 | 柏荣科技股份有限公司 | Purifying device for water quality and pipeline of water supply system |
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| Publication number | Publication date |
|---|---|
| CN1337361A (en) | 2002-02-27 |
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