CN1844297A - Waterproof injurant and method for eliminating oil layer pollution using same - Google Patents
Waterproof injurant and method for eliminating oil layer pollution using same Download PDFInfo
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- CN1844297A CN1844297A CN 200610043484 CN200610043484A CN1844297A CN 1844297 A CN1844297 A CN 1844297A CN 200610043484 CN200610043484 CN 200610043484 CN 200610043484 A CN200610043484 A CN 200610043484A CN 1844297 A CN1844297 A CN 1844297A
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Abstract
The invention discloses an agent for preventing water injury, wherein its formulation (by mass percent) includes non-ionic fluorine surface-active agent, discharging aid agent, ethylene glycol monobutyl ether, anti-expansion agent and antifreeze agent by the proportion of 5-30%, 0-20%, 20-60%, 0-20% and 0-20%.
Description
One, technical field
It is under development for the elimination oil reservoir injures to the present invention relates to a kind of oil field, raising crude production rate processing method, specifically a kind of method of utilizing waterproof injury agent and utilizing waterproof injury agent elimination oil layer pollution.
Two, background technology
The low infiltration sandrock oil reservoir is widely distributed in Chinese oil field, and many places are in high temperature, highly compressed mid-deep strata, based on siltstone and packsand, and the oil reservoir poor properties, porosity is low, is 5%～20%, and rate of permeation is lower than 10 * 10
-3μ m
2Oil reservoir account for more than 50% of low-permeability oil deposit sum.It is one of important element of injuring of low permeability oil field oil and water well that outside fluid is invaded the injury such as pollutions that is incompatible of water lock, water-sensitive, the water cause, well-flushing or kill-job when much oil wells are because of work, cause the back output that drives a well long time of recovery, the well production rate that has descends significantly, even loses oil-producing capacity.The field statistics data shows, the infiltration oil well of reservoir pressure low (pressure factor is less than 1), water ratio in oil well low (less than 50%), and the water blocking damage problem is more general, and damage ratio is more serious.Test-results shows that the hyposmosis rock core is after extraneous water is invaded, and permeability to oil will produce more serious injury, and the permeability plugging scope is between 7%-60%, and flowing pressure raises 1～3 times.Some oil reservoirs (comprise high infiltration oil reservoir) are because measure working fluid quality problems such as acidifying and operations, and it is very general especially to pollute the injury problem.
Three, summary of the invention
The purpose of this invention is to provide and a kind ofly utilize waterproof injury agent and utilize waterproof injury agent to eliminate the method for oil layer pollution, solve above-mentioned oil field and in volume increase is taken measures, oil reservoir damaged or avoid the problem that injures.
Technical scheme of the present invention realizes in the following manner:
The mass percent prescription of waterproof injury agent is: non-ion fluorin surfactant+cleanup additive+ethylene glycol monobutyl ether+expansion-resisting agent+frostproofer=5-30%+0-20%+20-60%+0-20%+0-20%, being mixed at normal temperatures according to the above ratio stirs, waterproof injury agent.
The processing method of utilizing waterproof injury agent to eliminate oil layer pollution is:
A, its mass percent prescription is when solving the oil-reservoir water lock: water injury agent: water=100%: 1 is at the uniform velocity clamp-oned oil reservoir at normal temperatures with mixing and stirring, clamp-ons radius 5-15 rice, drives a well not discharge opeing in 1-2 hour.
B, when avoiding sand control to cause oil reservoir damaged, its mass percent prescription is water injury agent: water=10-50%: 1 is mixed with the sand control spearhead with its mixing and stirring, before squeezing sand control agent, at the uniform velocity clamp-on oil reservoir at normal temperatures, clamp-on radius 3-5 rice, clamp-on sand control agent again, drive a well after 6-12 hour.
C, when carrying out formation fracturing with fracturing sand, its mass percent prescription is: water injury agent: water=5-30%: 1, with its mixing and stirring, clamp-on oil reservoir with 10-15Mpa at normal temperatures, clamp-on radius 8-15 rice, clamp-on fracturing sand again, drove a well in 4-6 hour.
D, as acidizing fluid when carrying out oil well acidation, its mass percent prescription is: waterproof injury agent: water: bionic acid=30-65%: 1: 5-10% at the uniform velocity clamp-ons oil reservoir at normal temperatures with its mixing and stirring, clamp-ons radius 3-6 rice, drove a well not discharge opeing in 12-48 hour.
Following outstanding advantage has been compared in waterproof injury agent with other treatment agents:
(1) waterproof injury agent has another name called water lock unblocking agent, water injures agent for releasing or the injury agent that dewaters is separated in prevention;
(2) be applied in completion and the washing well process, anti-sealing enters oil reservoir;
(3) be applied in the acidization, quicken after the acidifying acid solution effectively and discharge, prevent that acid solution and crude oil from producing acid sludge formation and causing reservoir damage;
(4) be applied in the fracturing process, anti-sealing lock, water-sensitive form;
(5) improve rate of permeation;
(6) oil reservoir is stablized in protection;
(7) oil reservoir no sequel, the cleaning construction;
(8) easy to operate, site operation equipment is convenient;
(9) anti-oil reservoir injury effect is remarkable, good in economic efficiency.
Four, description of drawings
Do not have
Five, embodiment
For further disclosing technical solution of the present invention, elaborate below by embodiment:
Construction technology of the present invention is:
Waterproof injured that agent and water are mixed with sand control spearhead, flushing fluid, fracturing liquid or mix and be re-dubbed acidizing fluid with bionic acid, compress at normal temperatures in oil well or the well, solution progressively infiltrates the stratum, drive a well after 1 hour, pore throat is infiltrated in waterproof injury agent, utilizes it to play the oil and water well pollution that factors such as separating the injury that dewaters causes fast and effectively, improves oil reservoir, improve rate of permeation, reach the effect that increases the oil production capacity or recover injection rate.
Use waterproof injury treatment agent to carry out steady sand yield-increasing technique, need to collect fully oil well geology, the production means as far as possible, thereby propose more targetedly, the solution of science.
The range of application of waterproof injury agent:
1, the application in oil well completion and operation process
When some low aqueous low pressure oil well well-completion practices, in water, add waterproof injury treatment agent, can prevent that sealing enters the injury that produces behind the oil reservoir, prevent the decline of oil well operation stopping production amount.Particularly some paraffin-troubled wells all dare not adopt the hot water well-flushing at present, wash back output and descend or well is washed extremely because cause easily; If in hot water, add waterproof injury agent, just can avoid the generation of above problem.
2, the application in the oil and water well acidifying
In the oil and water well acidization, in acid solution, add waterproof injury treatment agent, can quicken the reservoir damage that the row of returning of acid solution after the acidifying prevents that acid solution and crude oil generation milk sap, acid sludge etc. from causing effectively.After adding waterproof injury treatment agent, need not add chemical additives such as cleanup additive, mutual solvent, non-emulsifier again, so both reduced the acid solution cost, improved the acidifying quality again.
3, the application in fracture in oil and water wells
In the fracture in oil and water wells process, after the interpolation waterproof injures agent in fracturing liquid, because this agent can reduce the well that the water blocking damage factor exists significantly; The well of low-permeability oil deposit or the injury of high infiltration oil reservoir water.After so-called water lock is meant the wetting oil reservoir of outside fluid invasion water, can pushes original oil phase substance to the reservoir deep, and form a recessed water/oily contact surface, thereby produce capillary resistance to oil phase at water-oil interface.When if producing energy is not enough to overcome this addedresistance and flowage friction resistance, just the infringement of water lock is caused on the stratum.In fact, the formation pore venturi is distributed in the bigger scope, and for aperture road reservoir, capillary resistance is bigger, and water lock degree is serious.
Claims (2)
1, a kind of waterproof injury agent, it is characterized in that the mass percent prescription is: non-ion fluorin surfactant+cleanup additive+ethylene glycol monobutyl ether+expansion-resisting agent+frostproofer=5-30%+0-20%+20-60%+0-20%+0-20%, being mixed at normal temperatures according to the above ratio stirs, waterproof injury agent.
2, a kind of processing method of utilizing waterproof injury agent to eliminate oil layer pollution is: it is characterized in that a, its mass percent prescription is when solving the oil-reservoir water lock: water injury agent: water=100%: 1 is with mixing and stirring, at the uniform velocity clamp-on oil reservoir at normal temperatures, clamp-on radius 5-15 rice, drove a well not discharge opeing in 1-2 hour; B, when avoiding sand control to cause oil reservoir damaged, its mass percent prescription is water injury agent: water=10-50%: 1 is mixed with the sand control spearhead with its mixing and stirring, before squeezing sand control agent, at the uniform velocity clamp-on oil reservoir at normal temperatures, clamp-on radius 3-5 rice, clamp-on sand control agent again, drive a well after 6-12 hour; C, when carrying out formation fracturing with fracturing sand, its mass percent prescription is: water injury agent: water=5-30%: 1, with its mixing and stirring, clamp-on oil reservoir with 10-15Mpa at normal temperatures, clamp-on radius 8-15 rice, clamp-on fracturing sand again, drove a well in 4-6 hour; D, as acidizing fluid when carrying out oil well acidation, its mass percent prescription is: waterproof injury agent: water: bionic acid=30-65%: 1: 5-10% at the uniform velocity clamp-ons oil reservoir at normal temperatures with its mixing and stirring, clamp-ons radius 3-6 rice, drove a well not discharge opeing in 12-48 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610043484 CN1844297A (en) | 2006-04-05 | 2006-04-05 | Waterproof injurant and method for eliminating oil layer pollution using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610043484 CN1844297A (en) | 2006-04-05 | 2006-04-05 | Waterproof injurant and method for eliminating oil layer pollution using same |
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| CN1844297A true CN1844297A (en) | 2006-10-11 |
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| CN 200610043484 Pending CN1844297A (en) | 2006-04-05 | 2006-04-05 | Waterproof injurant and method for eliminating oil layer pollution using same |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899011A (en) * | 2012-11-16 | 2013-01-30 | 唐山冀油瑞丰化工有限公司 | Low-permeability reservoir water-lock releasing agent and preparation method thereof |
| CN102925127A (en) * | 2012-10-12 | 2013-02-13 | 中国石油化工股份有限公司 | Oil well acidifying pretreating agent |
| CN103923632A (en) * | 2014-01-28 | 2014-07-16 | 北京大德广源石油技术服务有限公司 | Desorbent and its evaluation method |
| CN105018060A (en) * | 2015-07-07 | 2015-11-04 | 西南石油大学 | Agent for preventing and eliminating condensate gas well water block and retrograde condensation, and preparation and application methods thereof |
| CN107459981A (en) * | 2017-03-22 | 2017-12-12 | 西南石油大学 | A kind of drying agent for reducing compact reservoir water-blocking effect |
| CN107892912A (en) * | 2017-11-02 | 2018-04-10 | 中国石油集团渤海钻探工程有限公司 | A kind of antiacid slag agent of acidifying suitable for a variety of acid fluid systems |
| CN107964397A (en) * | 2018-01-12 | 2018-04-27 | 中国海洋石油集团有限公司 | A kind of drilling fluid activity conditioning agent and preparation method thereof |
| CN108977185A (en) * | 2017-06-02 | 2018-12-11 | 中国石油天然气集团公司 | A kind of cleaning solution and its preparation method and application for bug dusting |
| CN109796952A (en) * | 2019-03-28 | 2019-05-24 | 曹高维 | A kind of compound anti-salt production method for salt de-plugging anti-in pit shaft |
| CN116200178A (en) * | 2023-01-17 | 2023-06-02 | 中国海洋石油集团有限公司 | Reservoir reconstruction liquid and preparation and application thereof |
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- 2006-04-05 CN CN 200610043484 patent/CN1844297A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925127B (en) * | 2012-10-12 | 2015-07-29 | 中国石油化工股份有限公司 | A kind of oil well acidation pretreating agent |
| CN102925127A (en) * | 2012-10-12 | 2013-02-13 | 中国石油化工股份有限公司 | Oil well acidifying pretreating agent |
| CN102899011A (en) * | 2012-11-16 | 2013-01-30 | 唐山冀油瑞丰化工有限公司 | Low-permeability reservoir water-lock releasing agent and preparation method thereof |
| CN102899011B (en) * | 2012-11-16 | 2014-10-29 | 唐山冀油瑞丰化工有限公司 | Low-permeability reservoir water-lock releasing agent and preparation method thereof |
| CN103923632B (en) * | 2014-01-28 | 2017-01-25 | 北京大德广源石油技术服务有限公司 | Desorbent and its evaluation method |
| CN103923632A (en) * | 2014-01-28 | 2014-07-16 | 北京大德广源石油技术服务有限公司 | Desorbent and its evaluation method |
| CN105018060A (en) * | 2015-07-07 | 2015-11-04 | 西南石油大学 | Agent for preventing and eliminating condensate gas well water block and retrograde condensation, and preparation and application methods thereof |
| CN107459981A (en) * | 2017-03-22 | 2017-12-12 | 西南石油大学 | A kind of drying agent for reducing compact reservoir water-blocking effect |
| CN107459981B (en) * | 2017-03-22 | 2019-10-01 | 西南石油大学 | A kind of drying agent reducing compact reservoir water-blocking effect |
| CN108977185A (en) * | 2017-06-02 | 2018-12-11 | 中国石油天然气集团公司 | A kind of cleaning solution and its preparation method and application for bug dusting |
| CN107892912A (en) * | 2017-11-02 | 2018-04-10 | 中国石油集团渤海钻探工程有限公司 | A kind of antiacid slag agent of acidifying suitable for a variety of acid fluid systems |
| CN107964397A (en) * | 2018-01-12 | 2018-04-27 | 中国海洋石油集团有限公司 | A kind of drilling fluid activity conditioning agent and preparation method thereof |
| CN107964397B (en) * | 2018-01-12 | 2021-03-12 | 中国海洋石油集团有限公司 | Drilling fluid activity regulator and preparation method thereof |
| CN109796952A (en) * | 2019-03-28 | 2019-05-24 | 曹高维 | A kind of compound anti-salt production method for salt de-plugging anti-in pit shaft |
| CN116200178A (en) * | 2023-01-17 | 2023-06-02 | 中国海洋石油集团有限公司 | Reservoir reconstruction liquid and preparation and application thereof |
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