CN102206508B - Technological process for floating oil delivering and settling dehydration of crude oil - Google Patents
Technological process for floating oil delivering and settling dehydration of crude oil Download PDFInfo
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- CN102206508B CN102206508B CN 201010141381 CN201010141381A CN102206508B CN 102206508 B CN102206508 B CN 102206508B CN 201010141381 CN201010141381 CN 201010141381 CN 201010141381 A CN201010141381 A CN 201010141381A CN 102206508 B CN102206508 B CN 102206508B
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Abstract
The invention discloses a technological process for floating oil delivering and settling dehydration of crude oil. The technological process comprises the following processes that: the crude oil containing water is conveyed in a joint station; medicine is added to the crude oil containing the water; then the crude oil containing the water is conveyed in a settling tank to carry out a oil-water separation to form a oil layer, a oil-water mixed layer and a sewage layer; a floating oil delivering apparatus is arranged in the settling tank, and the crude oil in the oil layer formed through the settling separation of oil and water is continuously and directly discharged from an oil inlet of the floating oil delivering apparatus and an oil line to complete the settling dehydration to be transformed into finished crude oil. According to the technological process provided by the present invention, a primary settlement or a secondary settlement formed through a series connection of two primarysettlements is adopted; the floating oil delivering apparatus is adopted for replacement of a fixed-type over flow device; the oil can be directly pumped through a oil pump, such that a surge tank iscanceled in the process; amount of the oil tank used in the single settlement is reduced by 50% compared to the amount of the oil tank used in a traditional process. Due to reducing the amount of theoil tank using in the process, the process is shortened. With the present invention, an operation is simple, management is easy, energy consumption in the production process is reduced, operation andrunning cost, management costs, capital expenditure and land expropriation cost are substantially decreased.
Description
[technical field]
The present invention relates to the unsteady fuel-displaced deposition dehydrating technical process of a kind of Crude Oil Settling Dehydration technique for field joint stations, particularly a kind of crude oil.
[background technology]
There are a large amount of underground water in the oil field usually also along with crude oil is plucked out of in carrying out the oil production process.Especially along with the minimizing of underground crude oil reserve, the water content in the extraction crude oil is also increasing, therefore must carry out to the crude oil of underground extraction dehydrating of crude oil and process.Through after the processed, make crude oil water content reach standard-required after, become finished product crude oil, be transferred or be sold to various places and carry out Downstream processing.
The oil water separation process of joint station crude oil has the several different methods such as deposition dehydrating, electro-dewatering, chemical dehydration, electrochemistry combined dehydration and supersonic dewatering, the oil field generally adopts the method for gravity settling to carry out the processed of crude oil both at home and abroad at present, deposition dehydrating is to utilize profit density variation and action of gravity, in slurry tank, carry out sedimentation and process, thereby realize separating of crude oil and water.
Existing deposition dehydrating technological process is that after crude oil was transported to joint station through pipeline, in joint station, crude oil entered the deposition dehydrating technical process.
As shown in Figure 1, at joint station, wet oil passes through first dosing, then enter slurry tank one time, through the sedimentation of tens hours or up to a hundred hours, oily water separation forms oil reservoir, oil mixing with water layer and sewage layer in slurry tank, and oil reservoir is topmost, the sewage layer is in the bottom, and the centre is the oil mixing with water layer.For oil reservoir is flow in tank outside the tank, above the inner tank skin of slurry tank, fixed overflow groove is installed, oil reservoir flow in the low level surge tank through overflow groove.Because monitoring and the operational difficulty of water-oil interface, in the process that crude oil flows from the slurry tank to the surge tank, can't avoid a large amount of sewage also to overflow in the surge tank together, therefore the water ratio of the crude oil of a surge tank all can't reach standard-required usually, therefore must carry out secondary settlement.In order to carry out secondary settlement, must the crude oil in surge tank be extracted in the secondary settlement tank with oil pump, in the secondary settlement tank, through and the identical settling process of sedimentation, oil reservoir passes through overflow, overflows in the secondary buffer tank.
Because the crude oil in the secondary settlement tank is through once settlement separate, water content is very little, therefore through behind the secondary settlement, can not carry large amount of sewage when the overflow of secondary settlement tank is fuel-displaced, therefore enter in the secondary buffer tank, crude oil water content can both reach standard-required substantially.No matter a sedimentation or secondary settlement, the sewage in the tank must be got rid of continuously, so that the liquid level of oil reservoir remains or reaches the processing requirement height.
In above-mentioned traditional crude oil sedimentation flow process, each time sedimentation must have two tanks cooperations to realize.Be that slurry tank must have surge tank supporting.Therefore to finish secondary settlement, need at least four tanks to cooperate use.
Above-mentioned traditional crude oil sedimentation flow process, its shortcoming is long flow path, at least will be through 2 settling process, and also the subordinate of each sedimentation must a supporting surge tank.It is many that oil tank takies quantity, and floor space is large, and once investment is large, and the sedimentation cycle is long, separation efficiency is low, weak effect.And because long flow path also makes the production process power consumption large, and expense is high, production management is complicated, operational difficulty.In addition, use the fuel-displaced maximum height position that liquid level must be brought up to the overflow groove place of overflow groove, it can't adjust oil level according to the production status variation and put, and therefore can't adjust the settling time according to processing requirement, makes dehydration increase the unnecessary middle residence time and intermediate expenditure.
[summary of the invention]
The object of the invention is to: the deficiency that corrects existing procedure, the fuel-displaced deposition dehydrating technical process of floating of a kind of expense crude oil low, simple to operate is provided, and the dehydrating effect of this flow process is good, and the subordinate of slurry tank need not arrange end bit buffering tank, the oil tank usage quantity reduces 50%, effectively shortens dewatering process flow.
The object of the present invention is achieved like this: it comprises following flow process: wet oil enters joint station, enter slurry tank after the dosing and carry out preliminary oily water separation, fluid in the slurry tank forms oil reservoir, oil mixing with water layer and the sewage layer that lays respectively at three layers of upper, middle and lowers, its improvements are: floating oil delivering device is installed in the slurry tank, crude oil in the oil reservoir that preliminary oily water separation forms is continuously directly discharged outside the slurry tank via oil-in and the transition pipeline of floating oil delivering device, finish a deposition dehydrating and process, become finished product crude oil; When described oil-in was in the moisture fluid, floating oil delivering device stopped hair oil automatically;
Above-mentioned crude oil floats in the fuel-displaced deposition dehydrating technical process, floating oil delivering device has been installed in the slurry tank, a deposition dehydrating is processed and is only used a slurry tank, directly two slurry tanks with floating oil delivering device is together in series by oil pump, consists of secondary settlement processed flow process; In the secondary settlement processed process of crude oil, the direct pump of crude oil of a slurry tank discharge is input into into the secondary settlement tank and carries out the secondary settlement separation, the floating oil delivering device of the crude oil of separating in the secondary settlement tank goes out tank, finishes fully dehydrating and processes, and becomes finished product crude oil;
In the unsteady fuel-displaced deposition dehydrating technical process of above-mentioned crude oil, oil pump is set outside slurry tank, oil pump is connected with the transition pipeline of floating oil delivering device and pumps;
In the unsteady fuel-displaced deposition dehydrating technical process of above-mentioned crude oil, the flying height switch is installed, the start-stop of control oil pump on the described floating oil delivering device;
Above-mentioned crude oil floats in the fuel-displaced deposition dehydrating technical process, and the tank well heater is set in slurry tank, and the fluid in the slurry tank is heated and tie up warm;
In the unsteady fuel-displaced deposition dehydrating technical process of above-mentioned crude oil, the oil-in place of described floating oil delivering device is equipped with the float(ing)valve to profit density sensitivity.
Than traditional Crude Oil Settling Dehydration technique, beneficial effect of the present invention is: facility is simple, and the sedimentation path is short, and separation efficiency is high, and the maintenance of equipment and maintenance are convenient; Substitute fixed overflow groove with floating oil delivering device, can directly with the oil pump oil pumping, make and cancel surge tank in the flow process, the oil tank usage quantity lacks than former flow process and reduces 50%, and can adjust liquid level according to the production fluid amount, reduce crude oil residence time in tank, reach efficient energy-saving; With the minimizing of tank quantity, shortened flow process, make simple to operately, convenient management has reduced the energy consumption of production process, and can significantly reduce production run cost and overhead charges, reduces huge capital cost, land expropriation cost; Adopt floating oil delivering device, can use the innage degree according to time and the crude production rate adjustment of settlement request, can be according to the fuel-displaced operation of floating of the arbitrary height of arts demand in tank; Oil pump can be realized automatic start-stop by the flying height switch, brings a lot of convenience for production management and production operation; Float(ing)valve can turn-off the oil-in of floating oil delivering device, has the oil extraction of intercepting water function, reduces fuel-displaced water amount, reduces sedimentation frequency, improves settling efficiency and effect.
[description of drawings]
The present invention will be further described below in conjunction with accompanying drawing
Fig. 1 is traditional Crude Oil Settling Dehydration process flow diagram
Fig. 2 is the unsteady fuel-displaced deposition dehydrating process flow diagram of crude oil of the present invention
Fig. 3 is the use state graph of the unsteady fuel-displaced deposition dehydrating technical process equipment used of crude oil
Among the figure: 1, slurry tank; 2, floating oil delivering device; 3, oil pump; 4, secondary settlement tank; 5, secondary floating oil delivering device; 6, secondary oil pump; 7, oil inlet pipe; 8, tank well heater; 9, offlet; 10, oil-in; 11, float(ing)valve; 12, transition pipeline; 13, outer output oil pipe; 14, oil reservoir; 15, oil mixing with water layer; 16, sewage layer.
[embodiment]
The crude oil of the present invention fuel-displaced deposition dehydrating technical process of floating mainly is comprised of the link of pumping outward of deposition dehydrating, floating oil delivering and tank in the tank, can adopt as required a deposition dehydrating to process, also can adopt two sedimentation series connection to use and consist of the secondary settlement processed, single this sedimentation is processed and is only used a slurry tank.As shown in Figures 2 and 3, preferably, the crude oil fuel-displaced deposition dehydrating process using secondary settlement processed of floating, the equipment of its use mainly comprises two deposition dehydrating oil discharging device and oil inlet pipe 7, oil pump and outer output oil pipes 13 that structure formation is identical with device.Take a deposition dehydrating oil discharging device as example, it comprises slurry tank 1, be installed on a floating oil delivering device 2, the tank well heater 8 in the tank body and be installed on offlet 9 on the tank skin, tank well heater 8 is arranged at tank base, offlet 9 is arranged on the tank skin near the position at the bottom of the tank, one end of a floating oil delivering device 2 stretches out outside the tank body by the tank skin short circuit, and tank body is outside equipped with an oil pump 3 that is connected with floating oil delivering device 2; Oil-in 10 places of floating oil delivering device are equipped with float(ing)valve 11.Relative position place with offlet 9 on slurry tank 1 tank skin is provided with the oil inlet pipe 7 of carrying wet oil, one time slurry tank 1 is connected through transition pipeline 12 and an oil pump 3 with secondary settlement tank 4, and secondary floating oil delivering device 5 is connected with tank body secondary oil pump 6 outward, is provided with the outer output oil pipe 13 of outside conveying finished product crude oil on the secondary oil pump 6.The concrete technology flow process of the present embodiment is as follows: wet oil is transported to joint station through pipeline, at joint station, the wet oil dosing is heated and is entered a slurry tank 1 by oil inlet pipe 7 and carry out an oily water separation, in slurry tank 1, fluid in 8 pairs of tank bodies of tank well heater is heated, rising along with temperature, the reduced viscosity of crude oil, water droplet is easy to sink in oil phase, accelerated oily water separation, after tens hours sedimentation, fluid in the tank forms the oil reservoir 14 that lays respectively at three layers of upper, middle and lowers, oil mixing with water layer 15 and sewage layer 16, and the oil-in 10 of a floating oil delivering device 2 is invaded in the oil reservoir 14 all the time, and oil-in 10 and transition pipeline 12 by a floating oil delivering device 2 can be transported to oil reservoir in the tank 14 outside the tank uninterruptedly, finishes a deposition dehydrating and processes;
An oil pump 3 of being located in the pump house will be extracted out through the oil of processed, after again dosing (according to manufacturing technique requirent), be delivered to and carry out the secondary oil depositing in water in the secondary settlement tank 4 and fall separation, in secondary settlement tank 4, because crude oil is processed through primary dewatering, therefore the moisture in the crude oil obviously reduces, fluid in 8 pairs of tank bodies of tank well heater is heated, after profit further separates, fluid in the tank again forms and lays respectively at bilevel oil reservoir 14 and sewage layer 16, oil reservoir 14 is transported to outside the tank by secondary floating oil delivering device 5, and then finish the secondary settlement processed, form the qualified finished product crude oil of water ratio.After secondary oil pump 6 in the pump house is extracted finished product crude oil out, carry tinning or entrucking outward transport through outer output oil pipe 13, sell.In above-mentioned Crude Oil Settling Dehydration process, when the sewage interface approached or reaches the oil-in position of floating oil delivering device, the float(ing)valve 11 autoshutdown oil-ins 10 of floating oil delivering device made the only fuel-displaced not water outlet of floating oil delivering device, improved separation efficiency; And the oily(waste)water of sewage layer 16 enters downstream line and carries out sewage disposal by outside offlet 9 drain tanks.
For the ease of production management, at floating oil delivering device the flying height switch is installed, when the oil-in 10 of floating oil delivering device is in or during near the sewage interface, automatically stops the oil pump operation, when being higher than the certain limit of water-oil interface, automatically start the oil pump operation.In addition, the start-stop of oil pump also can be adopted manually control according to production status.
In this technical process, the fuel-displaced of slurry tank can directly be flow automatically with the oil pump oil pumping or by floating oil delivering device, and the flow of floating oil delivering device, and with settlement separate crude production rate coupling out, its nominal diameter is consistent with the inlet/outlet pipeline of oil pump.Under the condition of same treatment amount and identical water ratio index, one time the sedimentation flow process only needs an oil tank, and the secondary settlement flow process only needs two oil tanks, therefore compare with the traditional process that generally adopt in the oil field, the usage quantity of oil tank has reduced 50% in this flow process.Take 5000 cubic metres of slurry tanks as example, build one 5000 cubic metres sedimentation structure tank, need expropriation of land and about 2,000 ten thousand Renminbi of initial cost, if adopt secondary settlement, the disposable country that can be of technical process of the present invention saves capital construction and expropriation of land investment more than 4,000 ten thousand.At present, approximately there is joint station in each oil field, the whole nation and is building more than 300 of joint station, transforms original flow process or is used for newly-built joint station with new technological process, can be the accumulative totals such as country's saving capital cost, production run expense every year and can reach more than 200,000,000 yuan of Renminbi.
Above-described embodiment is preferred embodiment of the present invention only, is not be used to limiting scope of the present invention, when using, can simplify above-described embodiment according to actual needs or the equivalence variation.
Claims (4)
1. unsteady fuel-displaced deposition dehydrating technical process of crude oil, it comprises following flow process: wet oil enters joint station, enter slurry tank after the dosing and carry out preliminary oily water separation, wet oil in the slurry tank forms oil reservoir, oil mixing with water layer and the sewage layer that lays respectively at three layers of upper, middle and lowers, it is characterized in that: floating oil delivering device is installed in the slurry tank, two slurry tank series connection with floating oil delivering device is used consist of the secondary settlement processed; Transition pipeline between slurry tank and secondary settlement tank is provided with oil pump No. one time, and the outer output oil pipe outside the secondary settlement tank is provided with the secondary oil pump; Described transition pipeline and outer output oil pipe are connected with floating oil delivering device in the secondary settlement tank with slurry tank respectively; Through once settlement separate, the oil reservoir of formation is directly discharged outside the slurry tank via oil-in and the transition pipeline of floating oil delivering device continuously, finishes a deposition dehydrating and processes; The crude oil of a slurry tank discharge carries out secondary settlement and separates by oil pump suction secondary settlement tank, outside the oil-in and transition pipeline drain tank of the floating oil delivering device of the crude oil of separating in the secondary settlement tank, finishes the dehydration sedimentation and processes, and becomes finished product crude oil; When described oil-in was in the sewage interface, oil pump stopped, and floating oil delivering device stops fuel-displaced automatically.
2. the unsteady fuel-displaced deposition dehydrating technical process of crude oil according to claim 1 is characterized in that: the flying height switch is installed, the start-stop of control oil pump on the floating oil delivering device.
3. the crude oil according to claim 1 fuel-displaced deposition dehydrating technical process of floating is characterized in that: the tank well heater is set in slurry tank, the fluid in the slurry tank is heated or tie up warm.
4. the unsteady fuel-displaced deposition dehydrating technical process of crude oil according to claim 1, it is characterized in that: the oil-in place of floating oil delivering device is equipped with the float(ing)valve to profit density sensitivity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010141381 CN102206508B (en) | 2010-03-31 | 2010-03-31 | Technological process for floating oil delivering and settling dehydration of crude oil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010141381 CN102206508B (en) | 2010-03-31 | 2010-03-31 | Technological process for floating oil delivering and settling dehydration of crude oil |
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| CN102206508A CN102206508A (en) | 2011-10-05 |
| CN102206508B true CN102206508B (en) | 2013-10-23 |
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| CN115161069A (en) * | 2021-04-06 | 2022-10-11 | 中国石油天然气集团有限公司 | Distributor, oil product dehydration device, oil product dehydration system and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201400587Y (en) * | 2009-03-31 | 2010-02-10 | 抚顺诺鑫机械制造有限公司 | Heat-tracing floating oil receiving device |
| CN201415838Y (en) * | 2009-03-17 | 2010-03-03 | 吴平 | Floating oil delivering device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201415838Y (en) * | 2009-03-17 | 2010-03-03 | 吴平 | Floating oil delivering device |
| CN201400587Y (en) * | 2009-03-31 | 2010-02-10 | 抚顺诺鑫机械制造有限公司 | Heat-tracing floating oil receiving device |
Non-Patent Citations (3)
| Title |
|---|
| "储罐自动化计量技术在油田联合站中的应用";陈祥光等;《自动化仪表》;20030228;第24卷(第2期);第38-40页 * |
| 刘合.《油田联合站集输***控制技术》.《油田联合站集输***控制技术》.2003,正文第3页. * |
| 陈祥光等."储罐自动化计量技术在油田联合站中的应用".《自动化仪表》.2003,第24卷(第2期),第38-40页. |
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Granted publication date: 20131023 Termination date: 20170331 |