CN109899044A - A kind of method that transfer drive washes alternately injection raising oil recovery factor - Google Patents
A kind of method that transfer drive washes alternately injection raising oil recovery factor Download PDFInfo
- Publication number
- CN109899044A CN109899044A CN201910233483.2A CN201910233483A CN109899044A CN 109899044 A CN109899044 A CN 109899044A CN 201910233483 A CN201910233483 A CN 201910233483A CN 109899044 A CN109899044 A CN 109899044A
- Authority
- CN
- China
- Prior art keywords
- micella
- permeability
- lotion
- slug
- injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
A kind of method that transfer drive washes alternately injection raising oil recovery factor, oilfield injection water and permeability adjustment material are mixed, permeability regulator is made into after mixing；The permeability regulator is injected into target reservoir, first order sub-percolation rate is formed and adjusts slug A1；Oilfield injection water and micella drive are washed material to mix, micella is made into after mixing and drives lotion；The micella is driven into lotion and injects the target reservoir, the micella for forming the first level drives lotion slug B1；It repeats i times, forms the permeability adjustment slug A of the target reservoir i-stage timeiLotion slug B is driven with micellai.Solve in the Chemical Flooding Fluids containing polymer potential harm is generated to the low permeability zone rich in remaining oil because of polymer so as to cause improve recovery ratio is high, long-term injection lead to problems such as note adopt difficult, the construction time is long, Produced Liquid processing difficulty is big, is difficult to use in the oil reservoir of high temperature and high salt or high viscosity viscous crude, oil recovery factor is greatly improved.
Description
Technical field
The present embodiments relate to technical field of petroleum extraction, and in particular to a kind of transfer drive washes alternately injection and improves crude oil
The method of recovery ratio.
Background technique
Crude oil occupies very important status in development of world economy, and total demand is in growing trend, and whole world discovery
New crude oil reserve progress is slower, and the final crude oil of general oil reservoir is averaged recovery percent of reserves lower than 50%, on this basis, if often
The oil recovery factor for improving 1% is equivalent to discovery one hundred million tonne oil field, therefore how to increase substantially oil recovery factor
Technical meaning is great.The reservoir characteristics of China's most oilfields are poor, and oil saturation is lower, and production decline is fast, and part oil field
Enter tertiary phase, investment Risks are high, and note adopts low efficiency, and Produced Liquid processing is difficult, and production cost per tone oil is unprecedented soaring etc.
Problems long-term existence.National crude oil year import volume passes through short, adaptable and fast, high efficiency, low cost reinforcing more than 60%
Oil recovery technique is applied to reduction China's crude oil dependence on foreign countries and improves oilfield economic benefit with realistic meaning.
At this stage, influence improve oil recovery factor key factor be displacement fluid expand swept volume degree and
The height of displacement efficiency.In secondary phase of oil production, because long-term injecting water leads to particularly thorny in interlevel layer, Chang Fasheng reservoir water flooding,
Water ratio in oil well rises quickly, and water-injection efficiency reduces, and generallys use the method for chemical profile control transfer drive to solve the problems, such as this.Pass through
Profile control system performance is adjusted, in the reservoir condition of 130 DEG C of salinity 25000mg/L of temperature, current the relevant technologies success rate
Height, the construction time is changeable, generally differs at one month to six months, construction is simple, can rapid expansion water drive involve body
Product generally improves oil recovery factor within 2% in validity period after construction, is a kind of effect in terms of expanding swept volume
The technology that fruit is good, validity period is long, risk is low and more economical after measure.But the technology only goes out from limited expansion swept volume
It is very limited to improve recovery ratio amplitude for hair, and effect is obviously deteriorated after multi-round profilecontrol transfer drive, main reason is that it plays expansion
The function and effect of big swept volume are single, and long-term, high-dose injection be easy to cause injection difficult, such as 108661612 A needle of CN
To the multiple round profile control for reinjecting low salinity water is injected after expandable hollow particles to high mine degree oil reservoir, to realize in high mineralization
Expansion can be played to reach preferable with expandable hollow particles, polymer microballoon and shake gels particle under the conditions of degree
Profile control effect, technical spirit only expand swept volume by way of profile control during still belonging to secondary oil recovery, specially as this
Even if benefit description when injecting nearly 0.2PV using a variety of partial size expandable hollow particles at concentrations up to 0.4%~0.8% are accumulative most
Height improves recovery ratio 7.2%.
In tertiary phase, the country uses polymer flooding, has alkali ternary composite driving and alkali-free binary combination flooding, main
It is used for a kind of high-quality oil reservoir, technical application to be mature.Foreign countries also once carried out small range field test, were mainly used for technology storage
It is standby.Wherein technique of polymer flooding is to inject highly viscous polymer solution for a long time to oil reservoir, by adjusting water-oil mobility ratio and benefit
The reinforcing displacement of reservoir oil carried out with the viscoplasticity of polymer solution, has also seen better effects, and the general recovery ratio amplitude that improves is 5%
~10%.Alkali ternary composite driving and alkali-free binary combination flooding technology are that addition can be played clearly on the basis of polymer flooding
The surfactant of removing oil film is washed, it is general to inject 5-10, to improve displacement efficiency while expanding swept volume,
It improves recovery ratio amplitude generally 8%~15%, which is generally used for temperature lower than 70 DEG C, and salinity is less than
50000mg/L, permeability are greater than the high-quality oil reservoir of 100mD, and temperature and salinity are higher, chemical agent cost used and
Technical risk is also higher.It has the disadvantage that 1. raising recovery ratio limited extent: first, polymer molecule is with larger
Waterpower radius of gyration, combination flooding fluid preferentially enter predominant pathway, pass through the absorption accumulation of polymer and viscoplasticity and surface
The emulsion formed after active agent molecule and crude oil effect has played the high permeability zones of low oil-containing certain plugging action, but
The macromolecular of polymer also polluted the hypotonic area for connecting the high oil-containing of these predominant pathways and capillary channel simultaneously, have super
The surfactant small molecule of low interfacial tension is again difficult to enter these hypotonic regions by natural separation effect, has and changes hair
The surfactant of tubule wetability, emulsification washing oil function and stretching oil droplet is mainly in the Thief zone region that displacing fluid feeds through to
It plays a role, and these high permeability zones are after long-term displacement, remaining crude oil tends to seldom and substantially residual oil state, therefore
The displacement efficiency of surfactant is not high.Secondly, enter with displacing fluid oil deposit deep part, polymer and surfactant due to
The suction-operated on stratum has been substantially reduced in the concentration of oil deposit deep part, and polymer is by stratum shear action, heat and biology
Its molecular weight has become very little after degradation, and the very low displacing fluid of viscoplasticity plays the predominant pathway of oil deposit deep part micro-
It sees and adjusts envelope effect very limited, therefore even if long time high concentration is continuously injected into its effect for expanding swept volume still
It is so limited.2. easily leading to, injection is difficult, Produced Liquid processing is difficult: due to polymer flooding and the chemical flooding containing polymer is through long-term
Be continuously injected into, infuse poly- pipeline corrosion fouling and form poly- dirty gel layer, injection pipeline undergauge is serious, and cleaning is difficult.Injection well is close
Because Polymer adsorption is accumulated, gelinite aggregation of the oil-containing containing dirt causes injection difficult, non-pressure break or oxidation de-plugging cannot in well area
It solves, and the problems such as short there are de-plugging validity period, easy safety accident out.It is chronically at injection high pressure injection state, easily note is caused to adopt
Imbalance, the serious and aqueous height in the corresponding benefited well liquid amount decline of the middle and later periods of chemical flooding, Produced Liquid is high containing polymer concentration,
And polymer molecular weight be degraded to it is tens of thousands of to hundreds of thousands, the polymer of these molecular weight be also easy to produce when by underground oil pump compared with
Stable emulsion causes treatment time of water length costly, and solution difficulty is big, and especially ternary composite driving is due to strong basicity
In the presence of water process is more difficult and production end corrosion and scaling is serious.At sea oil field also therefore has limited pushing away for such technology
Wide application.3. being not suitable for high temperature, with high salt, high viscosity oil and ultralow permeable reservoir: polymer flooding and containing poly- combination flooding to oil reservoir
Condition requires harsh.Since the temperature-resistant anti-salt of polymer is limited in scope, limited in high temperature and high salt oil deposit application, foreign countries have greatly
The report of the mining site failure of 90~120 DEG C of oil reservoirs of well spacing.Even if being greater than 3000mPa.s low temperature low mineralization to viscosity of crude
It oil reservoir polymer flooding and is also difficult to play containing poly- combination flooding technical advantage.Since polymer molecular size is much larger than hydrone
Size, it is even more helpless to all difficult oil reservoir of extra-low permeability water filling.
A kind of oil reservoir that country's onshore oil field can carry out chemical flooding at present also arrives the exploitation later period substantially, and two three classes oil reservoirs are such as
Fruit carries out chemical flooding, and there is also technical difficulty and economic risk.Offshore oilfield especially Bohai Bay Oil is for these reasons not yet
Continue to expand.In conclusion needing a kind of technical solution of new raising oil recovery factor.
Summary of the invention
For this purpose, the embodiment of the present invention provides a kind of method that transfer drive washes alternately injection raising oil recovery factor, solve secondary
Profile control raising recovery ratio amplitude is small when oil recovery, and the deficiency of technology is driven in tertiary oil recovery containing polymer chemistry, if polymer is to rich in surplus
The low permeability zone of excess oil generates potential harm, and so as to cause raising recovery ratio, not high, long-term injection causes note to adopt difficulty, apply
Long between working hour, Produced Liquid processing difficulty is big, is difficult to use in the problems such as high temperature and high salt or high viscosity heavy oil oil reservoir.
To achieve the goals above, the embodiment of the present invention provides the following technical solutions: a kind of transfer drive is washed alternately injection and is improved
The method of oil recovery factor, comprising the following steps:
S1) oilfield injection water and permeability adjustment material are mixed, permeability regulator is made into after mixing；
S2 the permeability regulator) is injected into target reservoir, first order sub-percolation rate is formed and adjusts slug A1；
S3 oilfield injection water and micella drive) are washed material to mix, micella is made into after mixing and drives lotion；
S4 the micella) is driven into lotion and injects the target reservoir, the micella for forming the first level drives lotion slug B1；
S5 step S1) is repeated) and step S4) i times, form the permeability adjustment slug A of the target reservoir i-stage timei
Lotion slug B is driven with micellai。
The preferred embodiment that alternately injection improves the method for oil recovery factor is washed as transfer drive, improves the side of oil recovery factor
Method the following steps are included:
T1 oilfield injection water and micella drive) are washed material to mix, micella is made into after mixing and drives lotion；
T2 the micella) is driven into lotion and injects the target reservoir, the micella for forming the first level drives lotion slug B1；
T3) oilfield injection water and permeability adjustment material are mixed, permeability regulator is made into after mixing；
T4 the permeability regulator) is injected into target reservoir, first order sub-percolation rate is formed and adjusts slug A1；
T5 step T1) is repeated) and step T4) i times, the micella for forming the target reservoir i-stage time drives lotion slug Bi
Slug A is adjusted with permeabilityi。
The preferred embodiment that alternately injection improves the method for oil recovery factor is washed as transfer drive, the permeability adjusts slug
Permeability adjustment material use polyacrylamide polymer and metal ion or nonmetallic ion organic Delay Action Crosslinker
It is formed by polymer gel system, nanometer or micron pre-crosslinking swell particle, inorganic nano or micron solid formation SiO2, oil
One of well cement and bentonite are a variety of, and the mass percent concentration of permeability adjustment material is 0.05%~
5%.Permeability adjust material selection need to according to conditions such as the temperature of specific oil reservoir, salinity and permeability and completion modes,
Polymer gel system, nanometer or the micron of the preferably organic delayed cross-linking of nonmetallic ion are pre-payed when 30~130 DEG C of temperature
Join volume expansion grain, nanometer polymer microballoon, inorganic nano or micron solid formation such as SiO2, oil-well cement and bentonite etc., or
The composition of above-mentioned material；Also the polymer gel system of metal ion delayed cross-linking can be selected when temperature is 30~70 DEG C, receive
Rice or micron order expended microsphere, inorganic nano or micron solid formation such as SiO2, oil-well cement and bentonite etc. or above-mentioned
The composition of material is 0.05%~5% using mass percent concentration.The polyacrylamide polymer is following
Polymerizable monomer composition: acrylamide, acrylic acid, 2- acrylamide-2-methyl propane sulfonic, N-Methyl pyrrolidone, N- hydroxyl
Methacrylamide, N- hydroxyethyl acrylamide, CH2=C (CnH2n+1)-COO-(CmH2m+1), styrene, CH2=CH-
(CkH2k)-N-(CH3)3, CH2=CH- (CkH2k)-N-(CH2)p-CH3Wherein n=1~10, m=1~10, k=0~4, p=0
~15, acrylamide monomer mass percent therein is 30%~95%, and other polymerized monomers account for 0~50%.
Wash the preferred embodiment that alternately injection improves the method for oil recovery factor as transfer drive, micella drive wash material and
Grease forms 10-2~10-5MN/m ultralow interfacial tension is simultaneously and crude oil forms emulsion, changes simultaneously the profit of the target reservoir
It is moist.
The preferred embodiment that alternately injection improves the method for oil recovery factor is washed as transfer drive, material packet is washed in the micella drive
Surfactant and auxiliary agent are included, the surfactant uses C10-C26Petroleum sulfonate, C14-C28Heavy alkylbenzene sulfonate,
C12-C22Aliphatic alcohol sulfate and fatty alkanol amide, C8-C22Carboxybetaine and hydroxyl sulfo betaine, the C of tertiary amine10-C22
Hydroxypropyl sulfobetaine, C12-C20Aliphatic ester, C8-C20Alkyl glycosides and its derivative, C8-C18Alkyl front three
Ammonium chloride, C10-C20What one or more of alkaline waste liquor of alkyl dimethyl amine oxide and commercial paper was formed
Composition, the mass percent concentration of the surfactant are 0.05%~5%, preferably 0.1~2%；
The auxiliary agent uses C2~C10Fatty alcohol, ethers R1-O-R2, inorganic base Na2CO3With NaOH, monomethyl amine, diformazan
Base amine and isopropanolamine is one such or the composition of a variety of formation, wherein R1For C2~C15Alkyl, R2For C1~C6's
Alkyl, the mass percent concentration of the auxiliary agent are 0%~10%, preferably 0.5%~1%.
The preferred embodiment that alternately injection improves the method for oil recovery factor is washed as transfer drive, the target reservoir is oil reservoir
Temperature be 30~130 DEG C, preferably 40 DEG C~120 DEG C, salinity≤280000mg/L, 80% or more block comprehensive water cut, target
Oil reservoir long-term injecting water has formed predominant pathway, and target reservoir permeability is greater than 10mD or there are the permeabilities in crack to be lower than
10mD, oil viscosity are less than 60000mPa.s.
The preferred embodiment that alternately injection improves the method for oil recovery factor is washed as transfer drive, by the permeability regulator
Lotion is driven with micella, the mixing material injection target reservoir is made into using oilfield injection water, when the permeability regulator is
When water-insoluble particle type materials, the mode of permeability regulator and micella drive lotion injection target reservoir includes online injection,
Permeability regulator and micella are driven into lotion during the online injection and are directly injected into waterflood-transmission line.To simplify construction process
Permeability regulator and micella can also be driven to lotion and be made into mixing material injection target reservoir with oilfield injection water, especially when
Form of construction work can be changed to online injection when being water-insoluble particle type materials by permeability regulator, i.e., adjust permeability
Agent and micella drive lotion and are directly injected into waterflood-transmission line, and construction site and large-scale injection equipment investment is greatly saved.
The preferred embodiment that alternately injection improves the method for oil recovery factor is washed as transfer drive, repeats step S1) and step
S4) i times, or repeat step T1) and step T4) i times the micella for forming the target reservoir i-stage time drives lotion slug BiWith
Permeability adjusts slug AiIn the process, permeability adjustment material or micella drive wash material be respectively adopted it is identical or different
Component.It is preferred that first order sub-percolation rate adjusts slug A1It is middle to use gel rubber system, it is used in second level sub-percolation rate adjustment slug
Such as inflatable type granular materials of particle type materials, the particle size of particle type materials is according to oil reservoir actual conditions and completion mode
Depending on.
As transfer drive wash alternately injection improve oil recovery factor method preferred embodiment, the permeability regulator or
Micella drives lotion and is injected according to the data qualification of the target reservoir.What data qualification provided in an embodiment of the present invention referred to
It is to be judged with target reservoir geologic data and dynamic creation data, it has been necessary to take between water injection profile or oil reservoir or oil reservoir
Interior permeability regulating measures expand swept volume, while because of remaining oil enrichment, only can not significantly provide original with water drive
Oil recovery needs to wash material using the drive of ultralow oil water interfacial tension to improve displacement efficiency.Material is adjusted using permeability
Particular technique index request and implementing process parameter, come ensure expand swept volume it is effective, according to specific micella drive wash material
Technical requirement and implementing process parameter to ensure to drive wash that effect is effective, successive apply of two kinds of materials substantially increases
Expand the reliability of swept volume and displacement efficiency.
The embodiment of the present invention has the advantages that by adjusting slug A with permeabilityiSlug B is washed with micella drivei, i=1,
2,3 ..., the chemical displacement of reservoir oil mode of cycle alternation injection is formed as i >=2, can well solve existing secondary oil recovery and three
Deficiency existing for secondary oil recovery technique is solved containing polymer during polymer chemistry drive to hyposmosis oil-containing hollow billet in oil reservoir
Pollution caused by improve recovery ratio effect poor, eliminate and need the measure cost of frequent de-plugging because note adopts difficulty；It can
It better assures that injected medicament can be realized to stream to the greatest extent, improves the utilization rate of chemical material, preferably in fact
Existing cost efficiency because the chemical material output time dilation of injection, accumulation output concentration are lower, and then solves Produced Liquid processing
The problem of or alleviate the intractable difficulty of water；The technical solution of the embodiment of the present invention has most of oil reservoirs preferable general
Adaptive can bring huge economic benefit, especially have realistic meaning in terms of promoting energy-saving and emission-reduction, drop to take synergy.
Detailed description of the invention
It, below will be to implementation in order to illustrate more clearly of embodiments of the present invention or technical solution in the prior art
Mode or attached drawing needed to be used in the description of the prior art are briefly described.It should be evident that the accompanying drawings in the following description
It is only exemplary, it for those of ordinary skill in the art, without creative efforts, can be with
It is extended according to the attached drawing of offer and obtains other implementation attached drawings.
Fig. 1 is the method raising crude oil that the transfer drive provided in the embodiment of the present invention washes that alternately injection improves oil recovery factor
Recovery ratio schematic diagram；
Fig. 2 is the method and process process that the transfer drive provided in the embodiment of the present invention washes that alternately injection improves oil recovery factor
Figure.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this theory
Content disclosed by bright book is understood other advantages and efficacy of the present invention easily, it is clear that described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
The embodiment of the present invention based on microscopic techniques principle it is as follows: 1. adjust Reservoir Permeability, expand swept volume: is logical
It crosses permeability regulator and permeability adjustment is carried out to oil reservoir destination layer position, block predominant pathway, lance in interlevel layer is mitigated or eliminated
Shield injects micella drive later and washes slug, start the oil-containing region of low-permeability, effectively expansion swept volume；2. water in relieving layer
It floods region: being acted on by the solubilized grease of micellar solution and wetting adjustment oil reservoir is to neutral wetting state, it is same convenient for expanding grease
Area is flowed, the hydrosphere oil being locally present in oil reservoir is become into moveable oil；The effect of washing is driven 3. playing: in the ultralow grease of micellar solution
Interfacial tension effect under, softening oil-water interfaces, make oil droplet stretcher strain remove crude oil, while have replacement provided cecum or
Crude oil in recess, in addition solubilising and emulsification, which are finally realized preferably to drive, washes effect.4. lotion, which strengthens permeability, adjusts work
With: the oil droplet after emulsification blocks short stay at suitable pore throat in flow process, has further functioned as Micro dynamic
Permeability adjustment effect.5. micellar solution improves capillary number and reduces hollow billet resistance, the seepage flow of injection profile is improved
Ability, injection test enter more easily.6. permeability regulator and micellar flooding agent adsorbance in oil reservoir are bigger than polymer, due to wave
And the expansion of volume, the area in the channel flowed through increase in geometry grade, the Retention of medicament significantly improves, therefore medicament produces
Out relatively late and output concentration is lower；Again since permeability regulator is all insoluble third phase composition of grease, be difficult to
The interface that soluble small molecular polymer enters oil hydrosol like that thickens toughening interfacial film, to alleviate on the whole
The emulsification risk and processing difficulty of Produced Liquid.7. existing permeability regulator and micellar technology are adapted to salinity
250000mg/L, the reservoir condition within 130 DEG C of temperature, therefore the application range of chemical flooding technology has been widened significantly.
The embodiment of the present invention based on macroscopical principle be with " improve recovery ratio=widened swept volume × displacement efficiency "
Foundation proposes a kind of method for solving the problems, such as lot of challenges existing for existing chemical flooding technology: by with (permeability adjusts
Slug AiSlug B is washed in the drive of+micellai) be the invention technology implementation unit, i=1,2,3 ..., form cycle alternation as i >=2
The chemical displacement of reservoir oil mode of injection.
It is that technical solution of the embodiment of the present invention improves oil recovery factor schematic diagram referring to Fig. 1, Fig. 1.It passes through as can be seen from Figure
Multiple injection units preferably expand swept volume after alternately injecting, micella drive washes slug and plays good washing oil effect,
The crude oil emulsion of wash-off slowly forms oily band, oily wall is formed after enrichment, so as to increase substantially oil recovery factor.Ginseng
See Fig. 2, it can be seen that the slug design flexibility of the embodiment of the present invention.
Specifically, experimental material used in the embodiment of the present invention is as follows: experimental water: target reservoir injects water.
Partially hydrolyzed polyacrylamide (PHPA), molecular weight 300~40,000,000, degree of hydrolysis 0~25%, the perfectly sound biology in Zhangjiakou have
Limit company provides；
Nanometer, micron and millimeter Weak gel particle, bibliography (Guo Yan etc., the synthesis and property of Pre-Cross Linked Grain Profile Control agent
Can evaluate, Speciality Petrochemicals progress 2007.10.002) self-control.
Acetic acid chromium cross linker, (Jin Lili etc., the synthesis evaluation of acetic acid chromium cross linker and its gelling mechanism are ground bibliography
Study carefully, fine chemistry industry in March, 2014, the 2nd phase of volume 31) self-control.
Phenolic aldehyde urea formaldehyde, bibliography (Sun Limei etc., the synthesis of water soluble phenol resin and hydration characteristics, applied chemistry
In August, 2008, the 8th phase of volume 25) self-control.
Nano-meter SiO_22, bentonite, chemical reagent.
Micella drives lotion, is made by oneself according to each target reservoir condition.
Embodiment 1
Target reservoir one: QHD32-6 50~18000mD of Reservoir Permeability, 65 DEG C of reservoir temperature or so, salinity
10000mg/L or so, 90% or more block comprehensive water cut, crude oil recovery percent of reserves about 18%, there are predominant pathway, water drives for water drive
Low efficiency.
Water drive saturated oils rock core prepares the hydrolysis of 0.2% molecular weight 17,000,000 of mass percent to aqueous 98%, by injection water
0.3% phenolic resin crosslinking agent of mass percent, permeability tune after mixing is added in the poly- propionyl amine aqueous solution of degree 25%
Whole timber material t1, injection simulation Reservoir Permeability rock core 0.05PV, Hou Ning 48h completion permeability adjustment slug A1；Injection water is matched
Material s is washed in the micella drive of mass percent 0.3% processed1Continue injection 0.1PV completion micella drive and washes slug B1, complete an injection
Unit continuously repeats 2 injection units.For last water drive to aqueous 98%, improving recovery ratio the results are shown in Table 1.
Embodiment 2
According to the method for embodiment 1, except that by permeability regulator t1Middle addition mass percent 0.1%
Nano-meter SiO_22, the result is shown in tables 1.
Embodiment 3
According to the method for embodiment 1, except that by permeability regulator t1It is average to change mass percent 0.2% into
The pre-crosslinking swell particle that 15 μm of partial size, improving recovery ratio the results are shown in Table 1.
Embodiment 4
According to the method for embodiment 1, injection water is prepared mass percent to aqueous 98% by water drive saturated oils rock core
0.05% acetic acid chromium cross linker of mass percent is added in the poly- propionyl amine aqueous solution of 0.2% molecular weight, 17,000,000 degree of hydrolysis 25%,
Permeability after mixing adjusts material t1, injection simulation Reservoir Permeability rock core 0.05PV, Hou Ning 48h completion permeability
Adjust slug A1；Material s is washed into the micella drive for injecting water preparation mass percent 0.2%1Continue to inject 0.1PV completion micella drive
Wash slug B1, an injection unit is completed, 2 injection units are continuously repeated.Last water drive improves harvesting to aqueous 98%
Rate the results are shown in Table 1.
Comparative example 1
According to the method for embodiment 1, except that permeability is adjusted slug A1And A2Injection rate is 0.3PV, will
A2Material s is washed in micella drive1Change injection water into, improving recovery ratio the results are shown in Table 1.
Comparative example 2
Water drive saturated oils rock core prepares the hydrolysis of 0.2% molecular weight 17,000,000 of mass percent to aqueous 98%, by injection water
Material is washed in the micella drive that mass percent 0.4% is added after the poly- propionyl amine aqueous solution of degree 25%, and it is molten that binary combination flooding is obtained after mixing
Liquid, for water drive to aqueous 98%, improving recovery ratio the results are shown in Table 1 after injecting rock core 0.3PV.
Embodiment 5
Target reservoir two: Zhongyuan Oil Field, 0.1~100mD of Reservoir Permeability, 113 DEG C of reservoir temperature, salinity
225039mg/L, block comprehensive water cut 96%, crude oil recovery percent of reserves about 23%, for water drive there are predominant pathway, oil reservoir is lipophilic
By force, waterflood efficiency is low.
Water drive saturated oils rock core prepares the hydrolysis of 0.4% molecular weight 5,000,000 of mass percent to aqueous 98%, by injection water
The poly- propionyl amine aqueous solution of degree 0.5% is added 0.5% phenolic resin crosslinking agent of mass percent, 0.1% nanometer of precrosslink is added
Volume expansion grain, permeability after mixing adjust material t2, it is complete that Reservoir Permeability rock core 0.05PV, Hou Ning 48h are simulated in injection
Slug A is adjusted at permeability1；Material s is washed into the micella drive for injecting water preparation 0.2%2Continue injection 0.1PV completion micella drive to wash
Slug B1, an injection unit is completed, 3 injection units are continuously repeated.Last water drive improves recovery ratio to aqueous 98%
It the results are shown in Table 1.
Embodiment 6
Injection water is prepared mass percent with embodiment 5, water drive saturated oils rock core to aqueous 98% by reservoir condition
Material s is washed in 0.2% micella drive2Injection 0.1PV completes micella drive and washes slug B1, injection water is prepared into mass percent 0.15%
Nanometer pre-crosslinking swell particle, permeability after mixing adjust material t3, rock core is reinjected to 0.05PV completion permeability
Adjust slug A1, an injection unit is completed, 3 injection units are continuously repeated.Last water drive to aqueous 98%, adopt by raising
Yield the results are shown in Table 1.
Comparative example 3
According to the method for embodiment 5, except that water drive saturated oils rock core prepares injection water to aqueous 98%
0.15% nanometer of pre-crosslinking swell particle, permeability after mixing adjust material t2, injection simulation Reservoir Permeability rock core
0.3PV, last water drive to aqueous 98%, the result is shown in tables 1.
Table 1 improves recovery ratio result
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.
Claims (9)
1. a kind of transfer drive washes the method that alternately injection improves oil recovery factor, which comprises the following steps:
S1) oilfield injection water and permeability adjustment material are mixed, permeability regulator is made into after mixing；
S2 the permeability regulator) is injected into target reservoir, first order sub-percolation rate is formed and adjusts slug A1；
S3 oilfield injection water and micella drive) are washed material to mix, micella is made into after mixing and drives lotion；
S4 the micella) is driven into lotion and injects the target reservoir, the micella for forming the first level drives lotion slug B1；
S5 step S1) is repeated) and step S4) i times, form the permeability adjustment slug A of the target reservoir i-stage timeiAnd micella
Drive lotion slug Bi。
2. a kind of transfer drive according to claim 1 washes the method that alternately injection improves oil recovery factor, which is characterized in that packet
Include following steps:
T1 oilfield injection water and micella drive) are washed material to mix, micella is made into after mixing and drives lotion；
T2 the micella) is driven into lotion and injects the target reservoir, the micella for forming the first level drives lotion slug B1；
T3) oilfield injection water and permeability adjustment material are mixed, permeability regulator is made into after mixing；
T4 the permeability regulator) is injected into target reservoir, first order sub-percolation rate is formed and adjusts slug A1；
T5 step T1) is repeated) and step T4) i times, the micella for forming the target reservoir i-stage time drives lotion slug BiAnd infiltration
Rate adjusts slug Ai。
3. a kind of transfer drive according to claim 1 or 2 washes the method that alternately injection improves oil recovery factor, feature exists
In the permeability adjustment material of the permeability adjustment slug uses polyacrylamide polymer and metal ion or nonmetallic
Organic Delay Action Crosslinker of ion is formed by polymer gel system, nanometer or micron pre-crosslinking swell particle, nanometer polymerization
Object microballoon, inorganic nano or micron solid formation SiO2, one of oil-well cement and bentonite or a variety of, the permeability adjustment
The mass percent concentration of material is 0.05%~5%；
The polyacrylamide polymer is following polymerizable monomer composition: acrylamide, acrylic acid, 2- acryloyl
Amine -2- methyl propane sulfonic acid, N-Methyl pyrrolidone, N hydroxymethyl acrylamide, N- hydroxyethyl acrylamide, CH2=C
(CnH2n+1)-COO-(CmH2m+1), styrene, CH2=CH- (CkH2k)-N-(CH3)3,CH2=CH- (CkH2k)-N-(CH2)p-CH3
Wherein n=1~10, m=1~10, k=0~4, p=0~15, acrylamide monomer mass percent therein be 30%~
95%, other polymerized monomers account for 0~50%.
4. a kind of transfer drive according to claim 1 or 2 washes the method that alternately injection improves oil recovery factor, feature exists
In material is washed in the micella drive and grease forms 10-2~10-5MN/m ultralow interfacial tension is simultaneously and crude oil forms emulsion, simultaneously
Change the wetability of the target reservoir.
5. a kind of transfer drive according to claim 4 washes the method that alternately injection improves oil recovery factor, which is characterized in that institute
Stating micella drive and washing material includes surfactant and auxiliary agent, and the surfactant uses C10-C26Petroleum sulfonate, C14-C28's
Heavy alkylbenzene sulfonate, C12-C22Aliphatic alcohol sulfate and fatty alkanol amide, C8-C22The carboxybetaine and hydroxyl sulphur of tertiary amine
Base glycine betaine, C10-C22Hydroxypropyl sulfobetaine, C12-C20Aliphatic ester, C8-C20Alkyl glycosides and its derivative,
C8-C18Alkyl trimethyl ammonium chloride, C10-C20One of alkaline waste liquor of alkyl dimethyl amine oxide and commercial paper or two
Kind composition formed above, the mass percent concentration of the surfactant are 0.05%~5%；
The auxiliary agent uses C2~C10Fatty alcohol, ethers R1-O-R2, inorganic base Na2CO3With NaOH, monomethyl amine, dimethyl amine and
Isopropanolamine is one such or the composition of a variety of formation, and the mass percent concentration of the auxiliary agent is 0%~10%, wherein
R1For C2~C15Alkyl, R2For C1~C6Alkyl.
6. a kind of transfer drive according to claim 1 or 2 washes the method that alternately injection improves oil recovery factor, feature exists
In, the target reservoir is that reservoir temperature is 30~130 DEG C, salinity≤280000mg/L, 80% or more block comprehensive water cut,
Target reservoir long-term injecting water has formed predominant pathway, and target reservoir permeability is greater than 10mD or there are the permeabilities in crack to be lower than
10mD, oil viscosity are less than 60000mPa.s.
7. a kind of transfer drive according to claim 1 or 2 washes the method that alternately injection improves oil recovery factor, feature exists
In, the permeability regulator and micella are driven into lotion, the mixing material injection target reservoir are made into using oilfield injection water,
When the permeability regulator is water-insoluble particle type materials, permeability regulator and micella drive lotion and inject target reservoir
Mode include online injection, permeability regulator and micella are driven into lotion during the online injection and are directly injected into water injection pipe
Line.
8. a kind of transfer drive according to claim 1 or 2 washes the method that alternately injection improves oil recovery factor, feature exists
In repetition step S1) and step S4) i times, or repeat step T1) and step T4) the i formation target reservoir i-stage time
Micella drives lotion slug BiSlug A is adjusted with permeabilityiIn the process, material difference is washed in the permeability adjustment material or micella drive
Using identical or different component.
9. a kind of transfer drive according to claim 1 or 2 washes the method that alternately injection improves oil recovery factor, feature exists
In the permeability regulator or micella drive lotion and injected according to the data qualification of the target reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910233483.2A CN109899044A (en) | 2019-03-26 | 2019-03-26 | A kind of method that transfer drive washes alternately injection raising oil recovery factor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910233483.2A CN109899044A (en) | 2019-03-26 | 2019-03-26 | A kind of method that transfer drive washes alternately injection raising oil recovery factor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109899044A true CN109899044A (en) | 2019-06-18 |
Family
ID=66953871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910233483.2A Pending CN109899044A (en) | 2019-03-26 | 2019-03-26 | A kind of method that transfer drive washes alternately injection raising oil recovery factor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109899044A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821486A (en) * | 2019-11-18 | 2020-02-21 | 西南石油大学 | Reservoir dominant channel physical property parameter calculation method |
| CN112081566A (en) * | 2020-09-30 | 2020-12-15 | 东北石油大学 | Online injection method and equipment for oilfield inorganic gel profile control and flooding agent |
| CN113637465A (en) * | 2021-08-16 | 2021-11-12 | 中海油田服务股份有限公司 | Oil displacement method and application thereof |
| CN113969761A (en) * | 2020-07-24 | 2022-01-25 | 中国石油化工股份有限公司 | Periodic profile control and flooding method for ultrahigh water-cut oil reservoir |
| CN114059978A (en) * | 2020-08-03 | 2022-02-18 | 中国石油化工股份有限公司 | Chemical cold-production method for strong water-sensitive heavy oil reservoir |
| CN114774097A (en) * | 2022-05-07 | 2022-07-22 | 陕西日新石油化工有限公司 | Injection increasing agent for water injection well of low-permeability oil reservoir and preparation method thereof |
| CN115142824A (en) * | 2021-03-31 | 2022-10-04 | 中国石油天然气股份有限公司 | Chemical flooding oil production method |
| CN115711110A (en) * | 2022-10-27 | 2023-02-24 | 新疆敦华绿碳技术股份有限公司 | CO increase in tight reservoirs 2 Miscible-phase flooding recovery method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562012A (en) * | 2010-12-27 | 2012-07-11 | 中国石油天然气股份有限公司 | Method for improving recovery ratio of normal heavy oil reservoirs in water-flooding development |
| CN103216211A (en) * | 2012-01-18 | 2013-07-24 | 中国石油天然气股份有限公司 | Method for carrying out profile control on fracture-type oil reservoir |
| CN104636536A (en) * | 2014-12-23 | 2015-05-20 | 东北石油大学 | Numerical simulation method for performing oil displacing after polymer flooding by alternatively injecting gel and chemical agent through CMG software |
| CA2967158A1 (en) * | 2014-11-18 | 2016-05-26 | Christian Bittner | Methods of mineral oil production using surfactants and producing said surfactants |
| US20170218257A1 (en) * | 2015-03-30 | 2017-08-03 | King Fahd University Of Petroleum And Minerals | Fluorosurfactant extraction process for carbonate reservoirs |
| CN109266322A (en) * | 2018-09-10 | 2019-01-25 | 四川大学 | A kind of polyacrylamide gel oil displacement agent and preparation method thereof with high tenacity |
-
2019
- 2019-03-26 CN CN201910233483.2A patent/CN109899044A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562012A (en) * | 2010-12-27 | 2012-07-11 | 中国石油天然气股份有限公司 | Method for improving recovery ratio of normal heavy oil reservoirs in water-flooding development |
| CN103216211A (en) * | 2012-01-18 | 2013-07-24 | 中国石油天然气股份有限公司 | Method for carrying out profile control on fracture-type oil reservoir |
| CA2967158A1 (en) * | 2014-11-18 | 2016-05-26 | Christian Bittner | Methods of mineral oil production using surfactants and producing said surfactants |
| CN104636536A (en) * | 2014-12-23 | 2015-05-20 | 东北石油大学 | Numerical simulation method for performing oil displacing after polymer flooding by alternatively injecting gel and chemical agent through CMG software |
| US20170218257A1 (en) * | 2015-03-30 | 2017-08-03 | King Fahd University Of Petroleum And Minerals | Fluorosurfactant extraction process for carbonate reservoirs |
| CN109266322A (en) * | 2018-09-10 | 2019-01-25 | 四川大学 | A kind of polyacrylamide gel oil displacement agent and preparation method thereof with high tenacity |
Non-Patent Citations (7)
| Title |
|---|
| 张嫦 等: "《精细化工工艺原理与技术》", 31 October 2005, 四川科学技术出版社 * |
| 张继红 等: "聚合物驱后凝胶与表面活性剂交替注入驱油效果", 《大庆石油学院学报》 * |
| 方道斌 等: "《丙烯酰胺聚合物》", 31 March 2006, 化学工业出版社 * |
| 杨服民 等: "《华北油田采油工程技术》", 31 March 1998, 石油工业出版社 * |
| 王果庭 等: "《聚丙烯酰胺不分散低固相泥浆》", 30 April 1980, 地质出版社 * |
| 陈勇 等: "《油田应用化学》", 31 January 2017, 重庆大学出版社 * |
| 齐鹏: "海外河油田深部调驱技术研究与应用", 《中国优秀硕士学位论文全文数据库 工程科技 1辑》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821486A (en) * | 2019-11-18 | 2020-02-21 | 西南石油大学 | Reservoir dominant channel physical property parameter calculation method |
| CN110821486B (en) * | 2019-11-18 | 2022-04-01 | 西南石油大学 | Reservoir dominant channel physical property parameter calculation method |
| CN113969761A (en) * | 2020-07-24 | 2022-01-25 | 中国石油化工股份有限公司 | Periodic profile control and flooding method for ultrahigh water-cut oil reservoir |
| CN114059978A (en) * | 2020-08-03 | 2022-02-18 | 中国石油化工股份有限公司 | Chemical cold-production method for strong water-sensitive heavy oil reservoir |
| CN114059978B (en) * | 2020-08-03 | 2024-05-07 | 中国石油化工股份有限公司 | Chemical cold recovery method for strong water-sensitive heavy oil reservoir |
| CN112081566A (en) * | 2020-09-30 | 2020-12-15 | 东北石油大学 | Online injection method and equipment for oilfield inorganic gel profile control and flooding agent |
| CN112081566B (en) * | 2020-09-30 | 2023-08-22 | 东北石油大学 | On-line injection method and equipment for inorganic gel profile control agent in oil field |
| CN115142824A (en) * | 2021-03-31 | 2022-10-04 | 中国石油天然气股份有限公司 | Chemical flooding oil production method |
| CN115142824B (en) * | 2021-03-31 | 2024-03-26 | 中国石油天然气股份有限公司 | Chemical flooding oil extraction method |
| CN113637465A (en) * | 2021-08-16 | 2021-11-12 | 中海油田服务股份有限公司 | Oil displacement method and application thereof |
| CN114774097A (en) * | 2022-05-07 | 2022-07-22 | 陕西日新石油化工有限公司 | Injection increasing agent for water injection well of low-permeability oil reservoir and preparation method thereof |
| CN115711110A (en) * | 2022-10-27 | 2023-02-24 | 新疆敦华绿碳技术股份有限公司 | CO increase in tight reservoirs 2 Miscible-phase flooding recovery method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109899044A (en) | A kind of method that transfer drive washes alternately injection raising oil recovery factor | |
| Kang et al. | Advances in enhanced oil recovery technologies for low permeability reservoirs | |
| Ding et al. | A comparative study of the mechanism and performance of surfactant-and alkali-polymer flooding in heavy-oil recovery | |
| CA3130824C (en) | Permeability-enhancing flooding system for tight oil reservoirs, and preparation and use thereof | |
| CN108166960B (en) | Low-permeability oil reservoir step-by-step profile control and flooding process | |
| CN110317598B (en) | Enhancement of compact reservoir CO2Flooding effect aqueous solution and preparation method and application method thereof | |
| Pei et al. | Study of polymer-enhanced emulsion flooding to improve viscous oil recovery in waterflooded heavy oil reservoirs | |
| US4676316A (en) | Method and composition for oil recovery by gas flooding | |
| CN102295918B (en) | Natural carboxylate-polymer microballoon binary composite control system, and preparation and application thereof | |
| CN104213870A (en) | Exploitation method for artificial foam oil in water-driven heavy oil reservoir | |
| CN110905460B (en) | Viscosity-reducing foaming exploitation method for common heavy oil reservoir | |
| CN111636848B (en) | Method for improving oil reservoir recovery ratio after polymer flooding | |
| CN106246150A (en) | A kind of oil field compression fracture remodeling method | |
| CN104109518A (en) | Oil displacement composition used for low permeability oil reservoirs, and preparation method thereof | |
| CN110776899A (en) | High-temperature high-salinity oil reservoir in-situ emulsification and viscosification system and application thereof | |
| CN106188403A (en) | A kind of anti-CO of high temperature and high salt oil deposit2has channeling blocking agent and preparation method thereof | |
| CN111518239B (en) | Emulsion type fracturing fluid resistance reducing agent and preparation method thereof | |
| CN109915093A (en) | A kind of method that " stifled/tune/drive " integration improves oil recovery | |
| CN112694885B (en) | High-activity drag reducer, self-imbibition energy-increasing extraction type slickwater fracturing fluid system suitable for shale oil reservoir, and preparation method and application thereof | |
| CN101712865A (en) | Viscoelastic weak gel profile control agent | |
| WO2015074588A1 (en) | Zirconium dispersed-particle gel combination flooding system and preparation method thereof | |
| CN101975051A (en) | Chemical flooding alternate injection method | |
| CN114181688B (en) | Surfactant combined oil displacement system suitable for multi-section plug of low-permeability reservoir and preparation method | |
| CN105315982A (en) | System of three-phase enhanced foam oil displacement after two-component compound oil displacement | |
| CN101260293A (en) | Hollow micro-sphere regulating driving agent and using method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190618 |
|
| RJ01 | Rejection of invention patent application after publication |