CN103821470B - Oil well heat injection nitrogen technology for washing well method - Google Patents
Oil well heat injection nitrogen technology for washing well method Download PDFInfo
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- CN103821470B CN103821470B CN201410099979.2A CN201410099979A CN103821470B CN 103821470 B CN103821470 B CN 103821470B CN 201410099979 A CN201410099979 A CN 201410099979A CN 103821470 B CN103821470 B CN 103821470B
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Abstract
The present invention relates to a kind of oil well heat injection nitrogen technology for washing well method and system, the method be by nitrogen car group processed produce continuously high pressure nitrogen through heater heating reach temperature required after, hot nitrogen carries out clean-out service by connecting under manifold and wellhead assembly Injection Well, reach wax removal, snaking, de-plugging or reducing thick oil viscosity, the row of helping, improve the object .The system is made up of nitrogen car group processed of oil well output, nitrogen heater, connection manifold, wellhead assembly and down-hole string.The oil well heat injection nitrogen technology for washing well method and system that the present invention is provided are reasonable in design, easy to implement, work well, high-content wax paraffin removal from oil well, snaking, de-plugging not only can be solved the problems, such as using it, can be also used for heavy oil wells and steam mixed water injection viscosity reduction, the row of helping, increase production and mining site ground Oil-Gas Gathering Transferring Pipeline pipeline purging, de-plugging operation, have the advantages that operating cost is low, energy-conserving and environment-protective, convenient, flexible.
Description
Technical field：
The present invention relates to a kind of remove wax deposition, fouling, de-plugging and heavy oil wells viscosity reduction, the row of helping for oil exploitation process oil well
Technology for washing well method and system, belong to DP technology technology class.
Background technology：
In oil exploitation oil well production process, particularly in high-content wax oil well, heavy oil wells production process, tubing wax,
Scale formation is extremely serious so that oil flow channel is tapered into, or even blocks, and causes oil well output to reduce or even stop production.Sending out
In the case of the serious wax deposition of life, fouling, as oily overpressure increases, can also increase the load of downhole pump, shorten oil pumping
The service life of pump, affects oil well normally to produce.For above-mentioned phenomenon, scene generally adopts mechanical paraffin removal, paraffin removing with chemical method, heating power
The methods such as well-flushing to paraffin removal from oil well de-plugging, to ensure that oil well is normally produced.However, mechanical paraffin removal not only less effective, Er Qieying
Oil well output is rung, paraffin removing with chemical method is relatively costly, and effect can not be satisfactory.Existing heating power well-washing wax-cleaning technology is typically adopted
Boiler heating heat carrier, such as deep fat, hot water etc. simultaneously bring heat energy into pit shaft by heat carrier, improve temperature in wellbore so as to exceed
The fusing point of wax, is allowed to dissolve, so as to reach the purpose of wax removal.By the use of deep fat as heat carrier high cost, hot-water flooding well-flushing
Have the disadvantage that the thermal efficiency is low, the flushing fluid for using is more, drainage period is driven a well more than three days, and sensitivity oil reservoir can be caused to hinder
Evil.In addition, the equipment that this kind of wax removal de-plugging mode is used is more, high energy consumption, efficiency are low, and exhaust emission is big, for borehole pressure compared with
High oil well operation difficulty is big, and the difficulty that dirt work washed by the oil well high to the content of wax and heavy oil wells wax removal is bigger.Also one kind passes through
Burning produces the method that hot flue gases carry out well-flushing, as the waste gas of its generation is to tubing and casing seriously corroded, does not use at present.
Content of the invention：
It is an object of the invention to provide a kind of remove oil well paraffinication, fouling, de-plugging and viscosity reduction, the row of helping effect are good, run
Low cost, the oil well heat injection nitrogen technology for washing well method and system of energy-conserving and environment-protective.
Technical scheme is as follows.The oil well heat injection nitrogen technology for washing well method that the present invention is provided is by nitrogen car group processed
Produce continuously high pressure nitrogen through nitrogen heating devices heat reach temperature required after, hot nitrogen is by connecting manifold and well
Clean-out service is carried out under mouth device injection well, wax removal, snaking, de-plugging or reducing thick oil viscosity, the row of helping, the mesh for improving oil well output is reached
's.The implementation steps of the technology for washing well method are as follows：
1. nitrogen car group processed and nitrogen heater rational deployment are connected by pipeline on oil well site therebetween,
And nitrogen heating means exit is connected with the cannula inlet port end on the well mouth of oil well device for treating clean-out service by connecting manifold
Connect；
2. generation continuously high pressure nitrogen is produced using nitrogen car group processed, nitrogen heater is transported to by pipeline；
3. nitrogen is heated using nitrogen heater, nitrogen temperature can be wanted by the technique of removing paraffin and washing well job design
Ask and set between 50 DEG C～350 DEG C or adjust；
4. it is heated to temperature required high pressure hot nitrogen and transmits to well mouth of oil well device through connecting manifold, by cannula inlet port end
From under oil sets annular space injection well, nitrogen injection pressure can change with wellbore pressure, arbitrarily adjust from 0～35MPa.
The present invention adopt oil well heat injection nitrogen technology for washing well system by nitrogen car group processed, nitrogen heater, connection manifold,
Wellhead assembly and down-hole string composition, nitrogen car group processed are connected with nitrogen heater, and nitrogen heater is by connecting manifold
It is connected with wellhead assembly, wellhead assembly is connected with down-hole string.
The oil well heat injection nitrogen technology for washing well method and system that the present invention is provided are reasonable in design, it is easy to implement, work well,
High-content wax paraffin removal from oil well, snaking, de-plugging not only can be solved the problems, such as using it, heavy oil wells are can be also used for and dropped with steam mixed water injection
Glue, the row of helping, volume increase and pipeline purging, the de-plugging operation of mining site ground Oil-Gas Gathering Transferring Pipeline, with operating cost is low, energy-conserving and environment-protective,
Convenient, flexible the advantages of.
Description of the drawings：
Fig. 1 is the connection flow process general structure schematic diagram of the present invention.Structural representations of the Fig. 2 for nitrogen heater 2.
Specific embodiment：
The enforcement of the present invention is described further below in conjunction with accompanying drawing.
As illustrated, the present invention is by nitrogen car group 1, nitrogen heater 2 processed, connection manifold 3, wellhead assembly 4 and downhole tubular
Post 5 is constituted, and its annexation is as previously mentioned.Wherein, nitrogen car group 1 processed adopts vehicular Electric Drive membrane nitrogen device (patent
Number：ZL201020198230.0), using its high-purity nitrogen, continuously produce high pressure nitrogen.Nitrogen heater
2 (see Fig. 2) are made up of switch board 2-1, cable 2-2, heating furnace 2-3 and heating rod 2-4, and heating rod 2-4 is placed in heating furnace 2-3
Interior, heating rod 2-4 outer ends are connected with switch board 2-1 by cable 2-2, and heating furnace 2-3 front and back ends are respectively equipped with high pressure nitrogen and enter
Mouth and high pressure-temperature nitrogen outlet, nitrogen heating-up temperature can set between 50 DEG C～350 DEG C on request or adjust.Nitrogen adds
2 two ends of thermal are connected with nitrogen car group 1 processed and the cannula inlet port end on wellhead assembly 4 with connection manifold 3 respectively by pipeline.
Wellhead assembly 4, down-hole string 5 are the production tree and down-hole pumping pipe string adopted when oil well is normally produced.
Claims (2)
1. a kind of oil well heat injection nitrogen technology for washing well method, it is characterised in that the process be produced by nitrogen car group processed continuous
Constantly the heated device heating of high pressure nitrogen reach temperature required after, carried out under manifold and wellhead assembly injection well by connecting
Clean-out service, reaches wax removal, snaking, de-plugging or reducing thick oil viscosity, the row of helping, the purpose for improving oil well output；Implementation step is as follows：
(1) nitrogen car group processed and nitrogen heater rational deployment are connected by pipeline on oil well site therebetween, and is led to
Cross connection manifold nitrogen heating means exit is connected with the cannula inlet port end on the well mouth of oil well device for treating clean-out service；
(2) generation continuously high pressure nitrogen is produced using nitrogen car group processed, nitrogen heater is transported to by pipeline；
(3) nitrogen is heated using nitrogen heater, nitrogen temperature can be by the technological requirement of removing paraffin and washing well job design
Set between 50 DEG C～350 DEG C or adjust；
(4) be heated to temperature required high pressure hot nitrogen through connect manifold transmit to well mouth of oil well device, by cannula inlet port end from
Under oil sets annular space injection well, nitrogen injection pressure can change with wellbore pressure, arbitrarily adjust from 0～35MPa.
2. oil well heat injection nitrogen technology for washing well method according to claim 1, it is characterised in that the process is by note
Entering hot nitrogen carries out paraffin removal from oil well, snaking, de-plugging operation, it can also be used to which heavy oil wells play viscosity reduction, the row's of helping effect with steam mixed water injection,
Can be additionally used in ground Oil-Gas Gathering Transferring Pipeline pipeline purging de-plugging operation.
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| CN201410099979.2A CN103821470B (en) | 2014-03-19 | 2014-03-19 | Oil well heat injection nitrogen technology for washing well method |
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| CN201410099979.2A CN103821470B (en) | 2014-03-19 | 2014-03-19 | Oil well heat injection nitrogen technology for washing well method |
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| CN103821470A CN103821470A (en) | 2014-05-28 |
| CN103821470B true CN103821470B (en) | 2017-03-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3377726B1 (en) * | 2015-11-19 | 2023-11-01 | Ecolab Usa Inc. | Solid chemicals injection system for oil field applications |
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| CN104895542A (en) * | 2015-06-17 | 2015-09-09 | 克拉玛依市昶禾科技有限公司 | Nitrogen heat energy oil production device and oil production method |
| CN105041247A (en) * | 2015-08-20 | 2015-11-11 | 淮南矿业(集团)有限责任公司 | Slag-discharge system using nitrogen |
| CN107420068A (en) * | 2016-05-24 | 2017-12-01 | 克拉玛依市鑫众石油工程技术服务有限公司 | A kind of high temperature nitrogen paraffin removal unit and wax removal technique |
| CN106401543B (en) * | 2016-11-07 | 2020-02-07 | 克拉玛依市鑫众石油工程技术服务有限公司 | Crude oil production device and method |
| CN106930715B (en) * | 2017-05-15 | 2018-12-14 | 中国石油化工股份有限公司 | Oil-water well self-propelled nitrogen negative pressure returns row's casting and dragging free device and its application method |
| CN107218012A (en) * | 2017-07-27 | 2017-09-29 | 中国石油集团渤海钻探工程有限公司 | A kind of hot N of Oil/gas Well2De-plugging process method and device |
| CN113062699A (en) * | 2021-03-31 | 2021-07-02 | 代建伟 | Process method for carrying out layered injection well flushing by utilizing nitrogen injection |
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| FR2214037B1 (en) * | 1973-01-16 | 1975-10-31 | Schlumberger Ltd | |
| CN101161984A (en) * | 2007-11-15 | 2008-04-16 | 姜永民 | Trace heating for oil well viscosity,coagulation reduction and dewaxing |
| CN101699024A (en) * | 2009-06-23 | 2010-04-28 | 华北油田诚信工业有限公司 | Paraffin removal technological method by washing oil wells with hot steam |
| CN201817282U (en) * | 2010-05-21 | 2011-05-04 | 徐勋 | Vehicle-mounted electric drive membrane nitrogen production and injection device |
| CN202868977U (en) * | 2012-09-29 | 2013-04-10 | 常州市奥琳斯邦热能设备有限公司 | Electric heating hot blast stove |
| CN203978386U (en) * | 2014-03-19 | 2014-12-03 | 盘锦新科工贸有限公司 | A kind of oil well heat injection nitrogen well washing system |
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Non-Patent Citations (1)
| Title |
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| 氮气助返排解堵技术;谷春雷 等;《油气田地面工程》;20100531;第29卷(第5期);第64页 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3377726B1 (en) * | 2015-11-19 | 2023-11-01 | Ecolab Usa Inc. | Solid chemicals injection system for oil field applications |
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Address after: 124010 science and Technology Street, Xinglongtai Industrial Development Zone, Panjin, Liaoning Applicant after: LIAONING XINKE PETROLEUM EQUIPMENT MANUFACTURING CO., LTD. Address before: 124010 science and Technology Street, Xinglongtai Industrial Development Zone, Panjin, Liaoning Applicant before: XINKE DEVELOPMENT & MANUFACTURE CO., LTD. |
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