CN109943308A - A kind of oil field CO2It drives and uses wellbore oil heavy component deposit de-plugging agent - Google Patents
A kind of oil field CO2It drives and uses wellbore oil heavy component deposit de-plugging agent Download PDFInfo
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- CN109943308A CN109943308A CN201910186695.XA CN201910186695A CN109943308A CN 109943308 A CN109943308 A CN 109943308A CN 201910186695 A CN201910186695 A CN 201910186695A CN 109943308 A CN109943308 A CN 109943308A
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Abstract
The present invention relates to technical field of tertiary oil recovery, especially belong to a kind of oil field CO2It drives and uses wellbore oil heavy component deposit de-plugging agent, it solves oil field CO2It drives crude oil heavy component deposit in pit shaft and blocks de-plugging problem.The present invention is made of following ingredients by mass percentage: 70%~90% industrial alcohol ether, 10%~30% diesel oil.The present invention is used for CO2It drives crude oil heavy component deposit in pit shaft and blocks de-plugging, effectively dredging pit shaft, smoothly remove for test equipment, well killing fluid and flushing fluid circulation, anti-corrosion dosing etc. provide channel, solve the problems, such as the production such as test, dosing, bar card, kill-job, well-flushing.
Description
Technical field
The present invention relates to technical field of tertiary oil recovery, belong to CO2A kind of oil field CO under the conditions of displacement2It drives former with pit shaft
Oily heavy component deposit de-plugging agent.
Background technique
During carbon dioxide drive, due to CO2Extraction to crude oil light components and its phase in the wellbore
State variation, so that well wellbore heavy component is easily deposited on pit shaft, causes bar card, serious person can cause pit shaft to block, so that well
Cylinder can not be successfully dosing, kill-job and clean-out service without circulation canal, normally produce to influence oil field.In injection end because of surface flow
Journey failure, working system change, and part gas injection well easily returns oil.When restoring gas injection, the crude oil in pit shaft is due to low temperature and CO2's
It washing away repeatedly, the heavy component of crude oil is deposited on tube inner wall, and it easily causes test equipment to go into the well and meets card when being hampered or above mention instrument,
Seriously affect successfully tested rate.Through detecting, CO2Repelling crude oil heavy component is with C16Based on upper higher carbon number hydrocarbon, colloid, pitch, wax
Content is up to 60%, and the content of colloid in conventional water drive crude oil heavy component, pitch, wax only has 30% or so.Conventional heavy
Component de-plugging agent is in CO2Dissolution dispersion rate is poor under drive low temperature environment, is unable to satisfy CO2Field demand is driven, CO is now badly in need of2Drive well
Effective block releasing technique of cylinder crude oil heavy component deposition tamper.The present invention provides a kind of oil field CO2It drives and uses wellbore oil heavy
Component deposit de-plugging agent.
Summary of the invention
Object of the present invention is to develop effectively to release CO2The de-plugging agent for driving wellbore oil heavy component deposition tamper, has
Effect dredging pit shaft, solves the problems, such as a kind of oil field CO of the production such as test, dosing, bar card, kill-job, well-flushing2Drive wellbore oil weight
Matter component deposit de-plugging agent.
Particular technique content of the invention is as follows: it is made of following ingredients by mass percentage: 70%~90% industrial alcohols
Ether, 10%-30% diesel oil.
Industrial alcohol ether is one of butyl glycol ether or 1,2- propandiol butyl ether.
Diesel oil is label 0 ,-No. 10 ,-No. 20 ,-No. 35, one of-No. 50.
Block releasing technique principle of the invention are as follows: contain ether in the composition of alcohol ether, can dissolve each other with diesel oil for lipophilic group
Solution system is formed, according to the principle of similar compatibility, the crude oil heavy component which can effectively dissolve in dispersion pit shaft is heavy
Product object has further speeded up the dissolution rate of dispersion of heavy deposit by the wetability and permeability of alcohol ether.Utilize alcohol ether
Low temperature resistance, it is ensured that the system is in CO2Drive the validity of pit shaft low temperature environment.
Compared with the prior art the present invention has the advantages that
1) low temperature resistant, under -20 DEG C of environment, effective de-plugging；
2) non-corrosive energy；
3) intersolubility is good, extemporaneous preparation is simple and easy.
Specific embodiment: the present invention will be further explained below with reference to examples: a kind of oil field CO2Drive wellbore oil
Heavy component deposit de-plugging agent, is made of following ingredients by mass percentage: 70%~90% industrial alcohol ether, 10%~30% bavin
Oil.
Industrial alcohol ether is one of butyl glycol ether or 1,2- propandiol butyl ether.
Diesel oil is label 0 ,-No. 10 ,-No. 20 ,-No. 35, one of-No. 50.
A kind of oil field CO of embodiment 1, present embodiment2Drive use wellbore oil heavy component deposit de-plugging agent, it by
Industrial alcohol ether, diesel oil composition, are made of following ingredients: 70%1,2- propandiol butyl ethers, No. 30%0 diesel oil by mass percentage.
The CO of present embodiment2It drives as follows with the preparation method of wellbore oil heavy component deposit de-plugging agent: pressing 1,2-
The mass percent of propandiol butyl ether and No. 0 diesel oil is that 70%:30% is mixed, and is stirred at low speed in mixed process, until mixing
Uniformly obtain the wellbore oil heavy component deposit de-plugging agent of present embodiment.
It is analyzed by laboratory experiment, at different temperatures heavy component deposit and CO2It drives and uses wellbore oil heavy component
When deposit de-plugging agent volumetric usage ratio is 1:3, at room temperature, 3h can effectively dissolve heavy group to the de-plugging agent formula system
Dividing deposit, 72h can effectively dissolve heavy component deposit under the conditions of -20 DEG C, it is able to satisfy live de-plugging requirement completely, remaining
Temperature experimental result is shown in Table 1.
1 crude oil heavy component deposit de-plugging agent de-plugging measurement result table of table
Embodiment 2, by taking Carbon Dioxide Test area a bite gas injection well wellbore oil heavy component deposit de-plugging test well as an example, it is first
Preparation method in example 1 is first pressed in matching liquid pool prepares the well that butyl glycol ether and-No. 50 diesel quality percentages are 80%:20%
Cylinder crude oil heavy component deposit de-plugging agent 5m3, de-plugging agent is injected from oil pipe or oil jacket annulus with ground injection pump, to oil pipe
In be completely filled with termination of pumping after de-plugging agent, closing well reacts open flow drain after 56h, for 24 hours after metaideophone.As can be seen from Table 2, it is infused before de-plugging
It is 8m that enter pressure, which be 15MPa time with fluence,3, design day is unable to complete with fluence, and injection pressure is to match in 13MPa time after de-plugging
Fluence is 15m3, fluence, de-plugging success can be matched complete design day.
Construction well day injection allocation situation table before and after 2 de-plugging of table
Embodiment 3, by taking Carbon Dioxide Test area flatly extraction well shaft crude oil heavy component deposit de-plugging test well as an example, it is first
Preparation method in example 1 is first pressed in matching liquid pool prepares the well that butyl glycol ether and-No. 50 diesel quality percentages are 90%:10%
Cylinder crude oil heavy component deposit de-plugging agent 5m3, de-plugging agent is injected from oil pipe or oil jacket annulus with ground injection pump, to oil pipe
In be completely filled with termination of pumping after de-plugging agent, closing well reacts 72h, continuously returns lifting rate about 6m after open flow3More than, drain age velocity is very fast,
Thus illustrate that pit shaft is unimpeded, de-plugging success.
Claims (3)
1. a kind of oil field CO2It drives and uses wellbore oil heavy component deposit de-plugging agent, it is characterised in that: by mass percentage under
It arranges into and is grouped as: 70%~90% industrial alcohol ether, 10%~30% diesel oil.
2. a kind of oil field CO according to claim 12It drives and uses wellbore oil heavy component deposit de-plugging agent, feature exists
In: industrial alcohol ether is one of butyl glycol ether or 1,2- propandiol butyl ether.
3. a kind of oil field CO according to claim 12It drives and uses wellbore oil heavy component deposit de-plugging agent, feature exists
In: diesel oil is label 0 ,-No. 10 ,-No. 20 ,-No. 35, one of-No. 50.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910186695.XA CN109943308A (en) | 2019-03-13 | 2019-03-13 | A kind of oil field CO2It drives and uses wellbore oil heavy component deposit de-plugging agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910186695.XA CN109943308A (en) | 2019-03-13 | 2019-03-13 | A kind of oil field CO2It drives and uses wellbore oil heavy component deposit de-plugging agent |
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| CN109943308A true CN109943308A (en) | 2019-06-28 |
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| CN201910186695.XA Pending CN109943308A (en) | 2019-03-13 | 2019-03-13 | A kind of oil field CO2It drives and uses wellbore oil heavy component deposit de-plugging agent |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838524A (en) * | 2010-05-13 | 2010-09-22 | 四川西南油大石油工程有限公司 | Oil soluble jam releasing agent for drilling fluid |
| CN102146281A (en) * | 2011-01-25 | 2011-08-10 | 中国石油天然气股份有限公司 | Oil-soluble paraffin-removal viscosity breaker |
| CN102746838A (en) * | 2011-04-22 | 2012-10-24 | 中国石油天然气股份有限公司 | Blocking remover of gas well shaft |
| CN103421477A (en) * | 2012-05-21 | 2013-12-04 | 克拉玛依市三达新技术开发有限责任公司 | Preparation method of blocking remover for relieving near-wellbore area gas condensate and particle obstruction |
| CN108359437A (en) * | 2018-04-14 | 2018-08-03 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of oil well lotion paraffin remover and its preparation method and application |
-
2019
- 2019-03-13 CN CN201910186695.XA patent/CN109943308A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838524A (en) * | 2010-05-13 | 2010-09-22 | 四川西南油大石油工程有限公司 | Oil soluble jam releasing agent for drilling fluid |
| CN102146281A (en) * | 2011-01-25 | 2011-08-10 | 中国石油天然气股份有限公司 | Oil-soluble paraffin-removal viscosity breaker |
| CN102746838A (en) * | 2011-04-22 | 2012-10-24 | 中国石油天然气股份有限公司 | Blocking remover of gas well shaft |
| CN103421477A (en) * | 2012-05-21 | 2013-12-04 | 克拉玛依市三达新技术开发有限责任公司 | Preparation method of blocking remover for relieving near-wellbore area gas condensate and particle obstruction |
| CN108359437A (en) * | 2018-04-14 | 2018-08-03 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of oil well lotion paraffin remover and its preparation method and application |
Non-Patent Citations (1)
| Title |
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| 王大全，等: "《精细化工辞典》", 30 June 1998 * |
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Application publication date: 20190628 |
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