CN104481479B - Polymer flooding correspondence oil well oil reservoir deep prevents the poly- method altered and inorganic agent used - Google Patents
Polymer flooding correspondence oil well oil reservoir deep prevents the poly- method altered and inorganic agent used Download PDFInfo
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- CN104481479B CN104481479B CN201410680437.4A CN201410680437A CN104481479B CN 104481479 B CN104481479 B CN 104481479B CN 201410680437 A CN201410680437 A CN 201410680437A CN 104481479 B CN104481479 B CN 104481479B
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- oil
- poly
- treatment liquid
- flocculation treatment
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/502—Oil-based compositions
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/138—Plastering the borehole wall; Injecting into the formation
Abstract
The present invention provides a kind of polymer flooding correspondence oil well oil reservoir deep and prevents the poly- method altered and inorganic agent used, and wherein methods described comprises the following steps：By the agent of coagulation flocculation treatment according to 5~25m of every rice bran oil layer3Consumption squeeze into stratum from oil reservoir annular space, wherein squeeze into speed it is fast after first slow by the way of, speed control is in 5~20m3/ hour；Wherein, the raw material composition of the coagulation flocculation treatment liquid includes：Diesel oil 10~20%；Neopelex 0.5~1.5%；Zinc chloride 10~30%；The hydrochloric acid of 8~15% concentration, surplus；Coagulation flocculation treatment liquid is headed into earth formation deep with displacement fluid, displacement fluid injection rate is controlled in 8 20m3/ hour；Closing well 8 16 hours, opening well and making production.Method of the present invention is with strong points, and success rate is high, and active ingredient can be brought into earth formation deep, increases displacement of reservoir oil swept volume, improves recovery ratio, saves production fluid processing cost.
Description
Technical field
The poly- method altered and inorganic agent used are prevented the present invention relates to a kind of, more particularly to a kind of polymer flooding pair
Answer oil well oil reservoir deep to prevent the poly- method altered and inorganic agent used, belong to oil field development and improve recovery efficiency technique field.
Background technology
Chinese overwhelming majority oil field is all developed using early flooding, and current each main force oil field has successively contained into height
Water phase, moisture content rises rapidly, and moisture content is high, in the urgent need to developing new oil development technology, improves the recovery ratio of old filed.
The technique of polymer flooding of wherein chemical method is one of technology that China carries out widest tertiary oil recovery at present, via guiding
The large scale application stage is stepped into experiment.Current grand celebration, huge port, Henan, triumph, Liaohe Oil Field have carried out polymer flooding ore deposit
Field application, achieves preferable oil increasing effect.But due to long-term waterflooding extraction, cause oil reservoir and physical properties of fluids to occur very
Big change, although the water plugging and profile controlling Jing Guo early stage, but oil displacement process medium to high permeable band causes advancing by leaps and bounds for polymer, causes to gather
Serious channelling occurs for compound, makes the reduction of polymer flooding efficiency, is seen poly- too early by effect well or producing well, aqueous to rise fast, extraction
Liquid polymer concentration is high, and displacement of reservoir oil swept volume is small, and recovery ratio increase rate is small, adds the intractability of production fluid.
To prevent polymer channelling, related personnel has been carried out numerous studies work.Current research is concentrated mainly on polymerization
The channelling rule of thing, scene influence are altered in terms of poly- geology and technological factor, the sensibility analysis for altering poly- influence factor, alter poly- well
Improvement be also concentrated mainly in injection well, be to pay close attention to injection technology and envelope alters the research of agent mostly.Related technology can be found in text
Offer " polymer flooding alters poly- mechanism and anti-channeling technical research " (Cui Jie, China University Of Petroleum Beijing's Master's thesis, in October, 2006), " gather
Compound drives and alters poly- mechanism and anti-channeling technical research " (Wang Shijun, China University Of Petroleum Beijing's Master's thesis, in November, 2007) etc..
Separately there are some experimental studies that profile adjustment and oil displacement is carried out in the polymer that postpolymer flood is remained using stratum.Related
Technology can be found in document " postpolymer flood cationic polymer profile adjustment and oil displacement experimental study ", and (clothing is gorgeous quiet, and China University Of Petroleum Beijing is large
Scholar's paper, in April, 2004), the paper mainly polymerize according to formation after polymer flooding anisotropism is serious, underground residual is a large amount of
The characteristics of thing, it have developed anions and canons flocculent deposit profile control agent；It is to increase flocculent deposit to the blocking intensity on stratum, have developed
Anions and canons+flyash profile control agent；In addition, utilization rate, profile control intensity and radius of profile control to increase profile control agent, have developed into
The frozen glue using dispersion in water solution type polyacrylamide as host that glue time length is different, gelling strength is big, this new profile control
Agent is added after flyash, and high-permeability reservoir can be blocked, when being not added with flyash, can the stratum of centering hyposmosis sealed
Stifled, i.e., the frozen glue can meet profile control, the water blockoff of the oil-water well of postpolymer flood different heterogeneity degree.Pertinent literature also has " poly-
Thermo-chemical precipitation profile control improves recovery efficiency technique research after compound drives " (model is gloomy, Hou Jiruili is preferably strong etc., oil-gas geology and harvesting
Rate, 2005,2：66-68) etc..
Above-mentioned prior art literature is handled in the injection well of polymer flooding, be unable to do without the side such as profile adjustment and oil displacement
Formula.
In addition, there is some researchs to relate to processing method of polymer produced liquid etc..As CN101250393A is disclosed
A kind of inorganic agent containing polymer produced liquid, wherein using ferrous sulfate or potassium permanganate for thinner, ferric trichloride to add
Plus agent, acetic acid or citric acid handle the Produced Liquid containing polymer for the aqueous solution of stabilizer, it was demonstrated that with viscosity reducing effect.
Although above DESCRIPTION OF THE PRIOR ART improvement polymer alters the necessity and difficulty of poly- (poly- to alter), all do not carry
Altered for carrying out selectivity envelope (by effect well or producing well) on polymer flooding correspondence oil well, prevent polymer from entering correspondence oil too early
The method of well.
The content of the invention
It is a primary object of the present invention to develop a kind of oil reservoir deep that is used for prevent polymer displacement of reservoir oil correspondence oil well from gathering what is altered
Method, to improve the efficiency of polymer flooding.
It is a kind of for the poly- place altered of polymer flooding correspondence oil well oil reservoir deep prevention another object of the present invention is to provide
Manage agent.
On the one hand, the present invention provides a kind of polymer flooding correspondence oil well oil reservoir deep and prevents the poly- method altered, this method bag
Include step：
(1) by coagulation flocculation treatment liquid according to 5~25m of every rice bran oil layer3Consumption squeeze into stratum from oil reservoir annular space, wherein squeeze
Enter speed by the way of fast after elder generation is slow, speed control is in 5~20m3/ hour；
Wherein, the raw material composition of the coagulation flocculation treatment liquid includes：Diesel oil 10~20%；Neopelex
0.5~1.5%；Zinc chloride 10~30%；The hydrochloric acid of 8~15% concentration, surplus；
(2) the coagulation flocculation treatment liquid of step (1) is headed into earth formation deep with displacement fluid, the control of displacement fluid injection rate exists
8-20m3/ hour；
(3) closing well 8-16 hours, opening well and making production.
The polymer flooding correspondence oil well oil reservoir deep of the present invention prevents the poly- method altered, the coagulation flocculation treatment liquid used
For water-in-oil emulsion, it can effectively prevent the particle near wellbore zone and formation fluid from carrying out coagulation reaction, this contains
The acidic emulsion of zinc chloride, slow demulsification discharges zinc cation in earth formation deep, runs into polymer, can catch polymer
Collection, gradually flocculates into bulky grain, is blocked in formation pore throat, prevents it from output, reaches and prevent producing well from producing poly- purpose, and
It can turn to follow-up liquid stream, play more preferable displacement of reservoir oil effect, increase swept volume, improve recovery ratio.
" deep " of the present invention refers to deep profile controlling, can be distinguished near wellbore zone, and treatment radius is more than 10 meters
Or treating capacity can be defined as deep more than 1000 sides, this case mainly uses water-in-oil type coagulation flocculation treatment liquid, makes to have
Imitate chemical composition and be demulsified after away near wellbore zone and discharged.By the purpose for slowly reaching processing oil reservoir deep.
" polymer flooding " of the present invention, is directed to squeeze into polymer solution in oil reservoir to improve the hand of production efficiency
Section, including but not limited to neat polymer oil extraction methods, the binary complex oil displacing mode containing polymer displacement of reservoir oil mode, such as polymerize
The thing displacement of reservoir oil and surfactant composite oil-displacing system, ternary composite oil-displacing mode, such as polymer displacement of reservoir oil, surfactant and alkali
Composite oil-displacing system.
According to specific embodiments of the present invention, coagulation flocculation treatment liquid of the invention is to prepare to obtain in accordance with the following methods
's：Neopelex is added in diesel oil, is sufficiently stirred for, and the hydrochloric acid for being dissolved with zinc chloride is added under stirring
Solution, stirring produces coagulation flocculation treatment liquid to water-in-oil emulsion is formed.
According to specific embodiments of the present invention, polymer flooding correspondence oil well oil reservoir deep of the invention prevents the poly- side altered
In method, it is fast after first slow during injection coagulation flocculation treatment liquid wherein in step (1) by the way of, place can be made initial stage slowly by squeezing into speed
Reason liquid preferably enter it is poly- alters passage, the injection later stage can accelerate speed, now due to coagulation flocculation treatment liquid leading edge because from
Farther out, the increase of radius, frontal movement speed reduction will not enter non-purpose passage to pit shaft.Preferably, polymerization of the invention
Thing drives correspondence oil well oil reservoir deep and prevented in the poly- method altered, during injection coagulation flocculation treatment liquid, and initial injection rate control exists
5-10m3Gradually accelerate after/hour, 10%~50% (percentage by volume of coagulation flocculation treatment liquid total amount, same as below) of injection
Injection rate, 10-20m is reached to last 30%~10%3/ hour.The general root of consumption of the coagulation flocculation treatment liquid of the present invention
According to oil well production thickness degree, permeability and go out depending on liquid intensity, the general layer 5-25 side per rice bran oil, usual consumption is 100~500
Site operation requirement can be met.
According to specific embodiments of the present invention, polymer flooding correspondence oil well oil reservoir deep of the invention prevents the poly- side altered
In method, the displacement fluid of injection can be also alternative in clear water and/or sewage, displacement fluid to include clay stabilization in step (2)
Additive agent (clay stabilizer such as 1~2%).Depending on the injection rate of displacement fluid can be according to on-site actual situations, mainly
It is that, by coagulation flocculation treatment liquid push-in oil reservoir deep, general 1000~3000 side can meet application claims.The injection of displacement fluid
By the way of speed is also fast after first slow, when injecting displacement fluid in the present invention, preferably initial injection rate control is in 8-12m3/ small
When, gradually accelerate injection rate after 10%~30% (percentage by volume of displacement fluid total amount, same as below) of injection, to last
30%~10% reaches 15~20m3/ hour.
According to specific embodiments of the present invention, polymer flooding correspondence oil well oil reservoir deep of the invention prevents the poly- side altered
Method also includes：Before injection coagulation flocculation treatment liquid, injected into stratum diesel oil or dilute crude oil (below viscosity 100mPa.s) with
Isolate formation fluid.The diesel oil or the specific consumption of dilute crude oil that this stage injects isolate the effect of formation fluid to realize,
15~30 sides are generally in the present invention.These diesel oil or dilute crude oil are avoided that follow-up coagulation flocculation treatment liquid at the shallow place of oil well i.e.
Generation coagulation is reacted, also, the diesel oil or dilute crude oil squeezed into are gradually thinning with the intensification of oil well, and coagulation flocculation treatment liquid is reached
Coagulation reaction is carried out with the particle in formation fluid at oil reservoir deep, enabling the method for the present invention prevents oil reservoir deep is poly- from altering.
On the other hand, prevent to gather what is altered for polymer flooding correspondence oil well oil reservoir deep present invention also offers a kind of
The agent composition of method, the agent composition includes coagulation flocculation treatment liquid, the raw material of the coagulation flocculation treatment liquid
Composition includes：Diesel oil 10-20%；Neopelex 0.5-1.5%；Zinc chloride 10-30%；The salt of 8-15% concentration
Acid, surplus.In the preferred embodiment of the present invention, the raw material composition of the coagulation flocculation treatment liquid is：Diesel oil
15%；Neopelex 1%；Zinc chloride 20%；The hydrochloric acid of 8-15% concentration, surplus.
Each component raw material used is commercially available in the coagulation flocculation treatment liquid of the present invention and supplement process agent, uses
Technical grade reagent.
The method of the present invention is particularly suitable for daily output liquid 40m3Below, aqueous 90%~95% sees poly- producing well, energy
Obtain more preferable application effect.
In summary, the poly- method altered of prevention on polymer displacement of reservoir oil correspondence oil well of the present invention, with following skill
Art effect：
(1), carry out gathering in advance from polymer flooding correspondence oil well and alter improvement, with strong points, success rate is high.
(2), the slow coagulation flocculation treatment liquid of water-in-oil type can bring flocculation active ingredient into earth formation deep, can prevent wadding
Solidifying active ingredient is consumed too early on nearly band stratum.
(3), the effect of the isolation formation fluid of prepad fluid (diesel oil or dilute crude oil) enables flocculation active ingredient further to arrive
Up to earth formation deep, flocculation active ingredient is further prevented to be consumed too early on nearly band stratum.
(4) coagulation flocculation treatment liquid trapping polymer formation flocculation sediment, blocks big pore throat or makes its undergauge, extend fluid
From distance of the well to producing well is squeezed into, increase displacement of reservoir oil swept volume, improve recovery ratio.
(5) the leading coagulation of polymer in production fluid, reduces production fluid intractability, saves production fluid processing cost.
Embodiment
Describe the beneficial effect of implementation and the generation of technical solution of the present invention in detail below by way of specific embodiment, it is intended to help
Help reader more fully understand the present invention essence and feature, not as to this case can practical range restriction.
Embodiment 1：
Certain poly- drive correspondence producing well, 1388.00-1402.60 meters of oil recovery well section, 23.7 meters of thickness/7 layers, mean permeability
735 millidarcies, shale content 5%, effecive porosity 26.10%.Produce the side of liquid 37 daily, day 2.9 tons of oil-producing, aqueous 92%, 2013
11 monthly tests of year go out production fluid 309.7ppm containing polymer, determine that implementation deep prevents from gathering and alter handling process.
The deep of the present embodiment prevents poly- processing construction procedure of altering from including：
1st, the preparation of coagulation flocculation treatment agent：Diesel oil 20wt%, neopelex 1wt%, zinc chloride 20wt%,
Remaining is hydrochloric acid (technical grade 10%) 59wt%.Neopelex is added in state is sufficiently stirred in diesel oil, will
The diesel oil that zinc chloride is dissolved in hydrochloric acid solution in backward stirring is slowly added to, until all addition forms water-in-oil emulsion,
Produce the coagulation flocculation treatment agent finished product of the present embodiment.
2nd, using the long piston pump of profile control, following construction processing liquid is divided into three sections and squeezed into order from oil reservoir annular space successively
Stratum：
First paragraph：Dilute side of crude oil (viscosity 26mPa.s) 15, isolates formation fluid；
Second segment：Slow coagulation flocculation treatment agent：280 sides, speed controlling in advance gradually adds after 5 sides/hour, 100 sides
Fast speed, last 70 side reaches 10 sides/hour；
3rd section：With the side of oil field recharged waste water 2000, speed controlling in advance is gradually accelerated after 10 sides/hour, 500 sides
Speed, last 400 side reaches 20 sides/hour；
3rd, closing well 8 hours, opening well and making production, is sampled once, comparative polymer output situation for seven days afterwards.
In the present embodiment, implement anti-poly- alter and produced 4 months after processing, take a sample to be detected within every 7 days, up to now
The well does not detect polymer, and daily output liquid drops to 28 sides from preceding 37 side that constructs, day oil-producing rise to 5.1 tons from 2.9 tons, it is aqueous
81.7% is dropped to from 92%.
Claims (10)
1. a kind of polymer flooding correspondence oil well oil reservoir deep prevents the poly- method altered, the method comprising the steps of：
(1) by coagulation flocculation treatment liquid according to 5~25m of every rice bran oil layer3Consumption squeeze into stratum from oil reservoir annular space, wherein squeezing into speed
Degree is by the way of fast after elder generation is slow, and speed control is in 5~20m3/ hour；
Wherein, the gross weight constituted using the raw material of the coagulation flocculation treatment liquid is counted as 100%, and it includes：Diesel oil 10~20%；
Neopelex 0.5~1.5%；Zinc chloride 10~30%；The hydrochloric acid of 8~15% concentration, surplus；
(2) the coagulation flocculation treatment liquid of step (1) is headed into earth formation deep with displacement fluid, displacement fluid injection rate is controlled in 8-
20m3/ hour；
(3) closing well 8-16 hours, opening well and making production；
The coagulation flocculation treatment liquid is prepared in accordance with the following methods to be obtained：
Neopelex is added in diesel oil, is sufficiently stirred for, and the salt for being dissolved with zinc chloride is added under stirring
Acid solution, stirring produces coagulation flocculation treatment liquid to water-in-oil emulsion is formed.
2. polymer flooding correspondence oil well oil reservoir deep according to claim 1 prevents the poly- method altered, wherein, inject coagulation
During flocculation treatment liquid, initial injection rate control is in 5-10m3/ hour, injection rate is gradually accelerated after injection 10%~50%,
10-20m is reached to last 30%~10%3/ hour.
3. polymer flooding correspondence oil well oil reservoir deep according to claim 1 prevents the poly- method altered, wherein, it is described to replace
Liquid is clear water or sewage.
4. polymer flooding correspondence oil well oil reservoir deep according to claim 3 prevents the poly- method altered, wherein, in displacement fluid
Include 1-2% clay stabilizers.
5. the polymer flooding correspondence oil well oil reservoir deep according to claim 1 or 3 prevents the poly- method altered, wherein, injection
During displacement fluid, initial injection rate control is in 8-12m3/ hour, gradually accelerate injection rate after injection 10%~30%, to most
30%~10% reaches 15-20m afterwards3/ hour.
6. polymer flooding correspondence oil well oil reservoir deep according to claim 1 prevents the poly- method altered, this method also includes：
Before injection coagulation flocculation treatment liquid, diesel oil or dilute crude oil are injected into stratum to isolate formation fluid.
7. polymer flooding correspondence oil well oil reservoir deep according to claim 6 prevents the poly- method altered, wherein, dilute original
Oil is below viscosity 100mPa.s crude oil, and diesel oil or dilute crude oil injection rate are 15-30m3。
8. polymer flooding correspondence oil well oil reservoir deep according to claim 1 prevents the poly- method altered, this method is application
In daily output liquid 40m3Below, aqueous 90~95% see poly- producing well.
9. a kind of be used for the poly- method altered of polymer flooding correspondence oil well oil reservoir deep prevention described in claim 1~8 any one
Agent composition, the agent composition include coagulation flocculation treatment liquid, with the raw material group of the coagulation flocculation treatment liquid
Into gross weight for 100% meter, it includes：Diesel oil 10-20%；Neopelex 0.5-1.5%；Zinc chloride 10-
30%；The hydrochloric acid of 8-15% concentration, surplus.
10. agent composition according to claim 9, wherein, constituted with the raw material of the coagulation flocculation treatment liquid
Gross weight is 100% meter, and it is：Diesel oil 15%；Neopelex 1%；Zinc chloride 20%；The salt of 8-15% concentration
Acid, surplus.
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| GB2237309A (en) * | 1989-10-26 | 1991-05-01 | Mobil Oil Corp | Method for using foams to improve alkaline flooding oil recovery |
| US5358046A (en) * | 1993-01-07 | 1994-10-25 | Marathon Oil Company | Oil recovery process utilizing a supercritical carbon dioxide emulsion |
| CN101016452A (en) * | 2007-02-28 | 2007-08-15 | 中国石化股份胜利油田分公司孤岛采油厂 | Preparation of composite cation blocking agent and use method of blocking and polymerizing |
| CN101370902A (en) * | 2005-11-22 | 2009-02-18 | 哈利伯顿能源服务公司 | Methods of consolidating unconsolidated particulates in subterranean formations |
| CN103773343A (en) * | 2014-01-13 | 2014-05-07 | 盘锦万通科工贸有限公司 | Preparation method and application of gel profile control oil-displacing agent |
| CN103937475A (en) * | 2014-04-22 | 2014-07-23 | 大庆中油泰克石油技术服务有限公司 | Carbon dioxide acidification blocking remover and process of not reversely discharging raffinate after acidification |
-
2014
- 2014-11-24 CN CN201410680437.4A patent/CN104481479B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2237309A (en) * | 1989-10-26 | 1991-05-01 | Mobil Oil Corp | Method for using foams to improve alkaline flooding oil recovery |
| US5358046A (en) * | 1993-01-07 | 1994-10-25 | Marathon Oil Company | Oil recovery process utilizing a supercritical carbon dioxide emulsion |
| CN101370902A (en) * | 2005-11-22 | 2009-02-18 | 哈利伯顿能源服务公司 | Methods of consolidating unconsolidated particulates in subterranean formations |
| CN101016452A (en) * | 2007-02-28 | 2007-08-15 | 中国石化股份胜利油田分公司孤岛采油厂 | Preparation of composite cation blocking agent and use method of blocking and polymerizing |
| CN103773343A (en) * | 2014-01-13 | 2014-05-07 | 盘锦万通科工贸有限公司 | Preparation method and application of gel profile control oil-displacing agent |
| CN103937475A (en) * | 2014-04-22 | 2014-07-23 | 大庆中油泰克石油技术服务有限公司 | Carbon dioxide acidification blocking remover and process of not reversely discharging raffinate after acidification |
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