CN104745163B - A kind of inorganic gel foam system and preparation method and application - Google Patents
A kind of inorganic gel foam system and preparation method and application Download PDFInfo
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- CN104745163B CN104745163B CN201510131275.3A CN201510131275A CN104745163B CN 104745163 B CN104745163 B CN 104745163B CN 201510131275 A CN201510131275 A CN 201510131275A CN 104745163 B CN104745163 B CN 104745163B
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- foam system
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- 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
- C09K8/516—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls characterised by their form or by the form of their components, e.g. encapsulated material
- C09K8/518—Foams
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- 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
Abstract
The invention discloses a kind of inorganic gel foam system, comprising host, initiator, auxiliary agent and foaming agent, the host, initiator, the mass fraction of auxiliary agent and foaming agent are respectively 8%~12%, 2.11%~2.35%, 0.4%~0.5% and 0.3%~0.5%.The preparation method of inorganic gel foam system provided by the invention is：Host is added to the water dissolving in proportion, initiator, auxiliary agent and foaming agent is sequentially added, stirs, obtained inorganic gel foam system can be used in high temperature and high salt oil deposit transfer drive.Inorganic gel foam system provided by the invention is preferable to the plugging effect of different permeability rock cores and has preferable abrasion resistance.In addition, the system preferentially entered in the case where injecting pressure larger duct, to high permeability formation produce selective shut-off ability it is stronger.The system has the characteristic that water blockoff does not block up oil, preferable to the selectivity of oil, water.
Description
Technical field
The invention belongs to field of oilfield chemistry, and in particular to a kind of inorganic gel foam system and preparation method thereof and in height
Application in warm high salinity reservoir transfer drive.
Background technology
With the progress of China's oil field development, conventional oil reservoir residue available resources have become fewer and fewer, in order to seek
Seek alternative resource, oilfielders' nontraditional reservoir by target diversion.Many high temperature in the oil fields such as triumph, Central Plains,
High salinity reservoirs, form a large amount of high permeable strips after long-period water drive, and injection water is advanced by leaps and bounds at a high speed along high permeable strip, made
It is difficult to start into middle low permeability pay, final sweep efficiency is relatively low.Water plugging and profiling technology be in oilfield development process one it is important
Technology.On the one hand it can improve water injection profile, so as to improve the sweep efficiency of injection water；On the other hand it can have
Effect closure high permeability zone, the development degree of oil reservoir is improved, is finally reached the purpose for improving recovery ratio.Conventional blocking agent is used for
During high temperature and high salt oil deposit, the shortcomings that weaker intensity and less stable be present, it is difficult to meet the needs of normal transfer drive；In addition often
The problem of when rule blocking agent is used for LOW PERMEABILITY RESERVOIR there is also being difficult to inject stratum.Therefore, exploitation is readily injected into stratum and temperature-resistant anti-salt
Preferable transfer drive system is effective basis for carrying out profile control and water plugging, the displacement of reservoir oil and thermal recovery envelope and the technological measure such as altering, for improving this
Class oil deposil erude petroleum recovery ratio is significant.The present invention has high temperature and high salinity, Ca for the oil reservoir in many oil fields in China2+、Mg2 +The features such as infiltration high and low Deng bivalent cation content, work out and a kind of new be suitable for high temperature and high salt oil deposit, be easy to inject
Inorganic gel foam system.
The content of the invention
In order to solve the shortcomings that existing when conventional water shutoff agent is used for high temperature and high salt oil deposit transfer drive, an object of the present invention exists
In providing a kind of inorganic gel foam system and preparation method thereof, the inorganic gel foam system is adjusted available for high temperature and high salt oil deposit
Cut open water blockoff.
Inorganic gel foam system provided by the present invention, comprising host, initiator, auxiliary agent and foaming agent, the host,
The mass fraction of initiator, auxiliary agent and foaming agent is respectively 8%~12%, 2.11%~2.35%, 0.4%~0.5% and
0.3%~0.5%.
In above-mentioned inorganic gel foam system, the host is commercially available aluminium polychloride, in light yellow powder.
In above-mentioned inorganic gel foam system, the initiator is phosphoamide.
In above-mentioned inorganic gel foam system, the auxiliary agent is sodium sulphate.
In above-mentioned inorganic gel foam system, the foaming agent is a kind of anion-nonionic surfactant, 90 DEG C~
150 DEG C, formation water salinity be 100000mg/L within the conditions of there is preferable frothing capacity.
The invention provides the preparation method of above-mentioned inorganic gel foam system, comprise the following steps：According to the above ratio will
Host aluminium polychloride is added to the water dissolving, sequentially adds initiator, auxiliary agent and foaming agent according still further to aforementioned proportion, stirring is equal
It is even, inorganic gel foam system is obtained, the initiator phosphoamide in the system decomposes under oil reservoir hot conditions produces ammonia and two
Two kinds of gases of carbonoxide, wherein carbon dioxide form foam in the presence of high temperature foaming.And ammonia is dissolved in water can make system
PH becomes larger, and host aluminium polychloride hydrolyzes generation inorganic gel, the formation of foam and the generation of gel in the basic conditions
Carry out simultaneously, and generation gel foam is wrapped in by gel after formation of foam so that foam interface film strength increases.
Inorganic gel foam system provided by the invention, it is 90 DEG C~150 DEG C to adapt to reservoir temperature, and pH is more than or equal to 3.75
Situation.
Compared with existing inorganic gel foam system, the beneficial effects of the present invention are：It is provided by the invention inorganic solidifying
Glue foam system, with the rise of reaction temperature, its gelling time is gradually shortened and amplitude of variation is larger, the intensity after system gelling
Have increased slightly.With the increase of formation water salinity, system gelling time slightly shortens, and intensity and heat endurance after being gelled
It is almost unchanged.With pH increase, system gelling time constantly shortens, be gelled after intensity gradually increase, heat endurance is without too
Big change.The system is preferable to the plugging effect of different permeability rock cores and has preferable abrasion resistance.In addition, the system exists
Injection pressure under preferentially enter larger duct, to high permeability formation produce selective shut-off ability it is stronger.The system has water blockoff not
The characteristic of oil is blocked up, it is preferable to the selectivity of oil, water.
Brief description of the drawings
Fig. 1 show single tube sandpack column flow chart of the present invention.
In figure：1- constant-flux pumps, 2- six-way valves, 3- intermediate receptacles, 5- pharmacy jars, 6- precision pressure gauges, 11- fill out sand tube, 9-
Graduated cylinder.
Fig. 2 show the relation that inventive gel foam system gelling rear-guard replaces pressure difference to change with injection pore volume multiple
Curve map.
Fig. 3 show the two-tube sandpack column flow chart of the present invention.
In figure：1- constant-flux pumps, 2- six-way valves, 4- water pots, 12- oil tanks, 5- pharmacy jars, 6- precision pressure gauges, 7- is hypotonic fills out
The hypertonic fill out sand tube of sandpipe, 8-, 9- graduated cylinders, 10- valves.
The high and low pipe streaming rate that oozes becomes with injection pore volume multiple after Fig. 4 show the gelling of inventive gel foam system
Change graph of relation.
Embodiment
Inorganic gel foam system provided by the invention, comprising host, initiator, auxiliary agent and foaming agent, the host, draw
The mass fraction for sending out agent, auxiliary agent and foaming agent is respectively 8%~12%, 2.11%~2.35%, 0.4%~0.5% and 0.3%
~0.5%.
The host is commercially available aluminium polychloride, in light yellow powder.
The initiator is phosphoamide.
The auxiliary agent is sodium sulphate.
The foaming agent is a kind of anion-nonionic surfactant, is in 90 DEG C~150 DEG C, formation water salinity
There is preferable frothing capacity under the conditions of within 100000mg/L.
The preparation method of inorganic gel foam system provided by the invention, step are as follows：
Host is added to the water dissolving according to the above ratio, initiator, auxiliary agent is sequentially added according still further to the upper ratio and rises
Infusion, stir, obtain the inorganic gel foam system.
The inorganic gel foam system that the present invention is provided and prepared can be used in high temperature and high salt oil deposit transfer drive, inorganic gel bubble
Foam system is issued after rubber coagulates in oil reservoir hot conditions has higher intensity and preferable heat endurance, can selective shut-off height
Infiltration layer.The reservoir temperature being applicable is 90 DEG C~150 DEG C, and pH is more than or equal to 3.75 situation.
Present disclosure is described in detail below in conjunction with specific embodiment.It should be noted that retouched in following embodiments
The combination of the technical characteristic or technical characteristic stated is not construed as isolated, and they can be mutually combined so as to reach
Superior technique effect.
Fig. 1 show single tube sandpack column flow chart of the present invention；Fig. 2 show inventive gel foam system gelling rear-guard
The graph of relation changed for pressure difference with injection pore volume multiple；Fig. 3 show the two-tube sandpack column flow chart of the present invention；Figure
4 show inventive gel foam system gelling after the high and low pipe streaming rate that oozes with injection pore volume multiple variation relation curve
Figure.
Embodiment 1
Sodium sulphate is diluted to the metabisulfite solution that mass concentration is 4%, foaming agent (mass concentration 100%) is diluted
Into 4% solution.
10.167mL water is added first in beaker, 1.5g aluminium polychlorides is weighed and adds in beaker and stir, so
After weigh 0.333g phosphoamides add beaker in and stir, be added dropwise what 1.5g had diluted into beaker with rubber head dropper
4% metabisulfite solution simultaneously stirs, and the solution ＆ stir that 1.5g has diluted is added dropwise in most backward beaker and uniformly obtains nothing
Machine gel-foam system.
After tested, system gelling time under the conditions of 130 DEG C is 2.45h, and intensity after it is gelled is 0.024MPa, 15
Dehydration rate after it is 0%, has preferable heat endurance.
Embodiment 2
Influence of the temperature to inorganic gel foam system gelling time, intensity and heat endurance
As described in Example 1, host mass concentration is 10%, and initiator quality concentration is 2.22%, auxiliary agent mass concentration
For 0.4%, foaming agent mass concentration is 0.4%, change reaction temperature research temperature to system gelling time, be gelled after intensity
And the influence of the performance such as heat endurance.Experimental result is as shown in table 1.
Influence of the temperature of table 1 to inorganic gel foam system performance
Note 1：" --- " is represented in the case of not being gelled in table, dehydration rate after the intensity and 30d after not being gelled.
Test result indicates that：With the rise of reaction temperature, the gelling time of inventive gel foam system constantly shortens
And amplitude of variation is larger, the intensity after gelling has increased slightly, heat endurance is slightly deteriorated.
Embodiment 3
Influence of the formation water salinity to inorganic gel foam system gelling time, intensity and heat endurance
As described in Example 1, host mass concentration is 10%, and initiator quality concentration is 2.22%, host mass concentration
For 0.4%, foaming agent mass concentration is 0.4%, respectively with the stratum water preparation formula solution of different salinities, investigates stratum water
The ion of influence of the salinity to system gelling time, intensity and heat endurance, wherein stratum water forms：Na+, Ca2+With
Cl-, experimental temperature is 130 DEG C.Experimental result is as shown in table 2.
Influence of the formation water salinity of table 2 to inorganic gel foam system performance
Test result indicates that：The gelling time of inorganic gel foam system of the present invention with formation water salinity increase slightly
Reduce, this is primarily due to Ca2+Have the function that to promote solidifying, the electric double layer on compressible colloidal particle surface Deng inorganic ion, promote
Make its crosslinking or coagulation.And the intensity and heat endurance after system gelling are almost unchanged with the increase of formation water salinity.
Embodiment 4
Influences of the pH to inorganic gel foam system gelling time, intensity and heat endurance
As described in Example 1, fixed host mass concentration is 10%, and initiator quality concentration is 2.22%, host quality
Concentration is 0.4%, and foaming agent mass concentration is 0.4%, is adjusted by the way that buffer solution (sodium carbonate or acetic acid) is added dropwise in formula solution
The influence of the pH of section system, research pH to intensity and heat endurance after the gelling time of the gel-foam system, gelling, wherein
It is 3.75 or so with the pH of system during distilled water preparation formula solution, detection formula solution is counted with Sartorius PB-10pH
PH, experimental temperature are 130 DEG C.Experimental result is as shown in table 3.
Influences of the table 3pH to inorganic gel foam system performance
Attached 2：" --- " expression does not have dehydration rate after intensity and 30d after gelling in table in the case of not being gelled.
Test result indicates that：With pH increase, the gelling time of inventive gel foam system constantly shortens that (this is main
Because with pH increase, system reaches the reason shortened the time of alkalescence condition needed for gelling reaction), it is strong after gelling
Gradually increase, heat endurance do not change much degree, wherein system is not gelled when pH is less than 3.75.
Embodiment 5
Inorganic gel foam system seal-off effect and flushing resistance
The seal-off effect and abrasion resistance of the system are determined using single tube sandpack column.In single tube sandpack column, constant-flux pump 1,
Six-way valve 2, intermediate receptacle 3, pharmacy jar 5, precision pressure gauge 6, the order of connection of fill out sand tube 11 and graduated cylinder 9 are as shown in Figure 1.Experiment
Process is：The quartz sand of filling appropriate particle size in 30cm fill out sand tube 11, with 1mL/min speed displacement, water surveys injection formula
Permeability K before solution0, 0.3PV gel-foam systems as described in Example 1 are injected by back-up sand with 1mL/min flow velocity
In pipe 11, treat that it is gelled by being put into after the good seal of fill out sand tube 11 in 130 DEG C of insulating boxs.Continue after system gelling with 1mL/
Min flow velocity displacement, make displacement pressure difference-injection pore volume multiple relation curve and observe displacement pressure difference with injection pore-body
The change of product multiple, permeability K after blocking up is calculated after displacement pressure is stable1And press formula：E=(K0-K1)/K0× 100% calculates
Sealing ratiod E.Sealing ratiod is recalculated when injecting 15PV and combines displacement pressure difference-injection pore volume multiple relation curve to examine
Examine the flushing resistance of gel-foam system.Experimental result is as shown in table 4.
The sand-filling tube model tables of data of table 4
Test result indicates that：The gel-foam system has preferable sealing characteristics in different permeability formations, especially
Suitable for the closure of middle low permeability formation.Fig. 2 is that system gelling rear-guard is bent for the relation that pressure difference changes with injection pore volume multiple
Line chart, figure intermediate cam shape curve is k=0.406D, square k=1.051D, round dot k=2.754D, rhombus k=
Curve map when 5.096D and fork-shaped are k=9.747D.It can be seen from Table 4 that continue water drive extremely after sealing ratiod is calculated
The sealing ratiod that 15PV is recalculated is more or less the same with the sealing ratiod being calculated for the first time, works as sequent water flooding as seen from Figure 2
After pressure stability continue water drive to pressure during 15PV with it is first steadily when pressure difference it is little, i.e., the gel-foam system tool
There is preferable flushing resistance.
Embodiment 6
Inorganic gel foam system is to the high and low selective shut-off ability for oozing stratum
The system is determined to the high and low selective shut-off performance for oozing stratum, two-tube sandpack column using two-tube sandpack column
In, constant-flux pump 1, six-way valve 2, water pot 4, oil tank 12, pharmacy jar 5, precision pressure gauge 6, hypotonic fill out sand tube 7, hypertonic fill out sand tube 8,
The annexation of graduated cylinder 9 and valve 10 is as shown in Figure 3.Experimentation is：2 are filled with the quartz sand of appropriate particle size simultaneously to ooze
The different fill out sand tube 11 of saturating rate is used as hypotonic fill out sand tube 7 and hypertonic fill out sand tube 8, with 1mL/min speed displacement, determines this two
The water of fill out sand tube 11 surveys permeability, and it is 5 or so to ensure their permeability grade；Hypotonic fill out sand tube 7 and hypertonic fill out sand tube 8 is in parallel
Carry out water drive and calculate respective streaming rate, untill the streaming rate of hypotonic fill out sand tube 7 and hypertonic fill out sand tube 8 is basicly stable；
0.3PV gel foam formula solutions are generally injected in hypotonic fill out sand tube 7 and the parallel connection of hypertonic fill out sand tube 8, are calculated in experimentation respective
Streaming rate；Treat that it is gelled by being put into after hypotonic fill out sand tube 7 and the good seal of hypertonic fill out sand tube 8 in 130 DEG C of insulating boxs, two pipes
Sequent water flooding in parallel simultaneously calculates respective streaming rate, untill the streaming rate of this two fill out sand tube 11 is basicly stable；Last root
According to experimental result make it is high by 8, low 7 ooze the streaming rate of pipe with injection pore volume multiple change curve, as shown in figure 4, water chestnut in figure
Shape is the hypertonic streaming rate of pipe 8, and triangle is the hypotonic streaming rate of pipe 7, and round dot is represented as pressure.Pressure is recorded in whole experiment process
Change.
As seen from Figure 4：Before gel-filled foam system, the streaming rate of hypertonic fill out sand tube 8 is 96.5% or so, low
The streaming rate for oozing fill out sand tube 7 is about 3.5%；Gel-foam system is injected after it is gelled, the streaming rate of hypertonic fill out sand tube 8
Decline final about 21%, it is finally 79% or so that the streaming rate of hypotonic fill out sand tube 7, which rises,.Show the system in the case where injecting pressure
Larger duct can be preferentially entered, selective shut-off effect is produced to high permeability formation.
Embodiment 7
Inorganic gel foam system is to aqueous and saturated core selective shut-off ability
Test and use single tube sandpack column, experiment flow is as shown in Figure 1.Experimentation is：With the quartz sand of same particle size
Two fill out sand tube 11 are filled simultaneously, with 1mL/min speed displacement, are determined this two water of fill out sand tube 11 and are surveyed permeability；Wherein one
Root fill out sand tube 11 injects 0.3PV gel foam solution；Water drive is to residual oil saturation after another saturation simulation oil of fill out sand tube 11
Spend and determine the permeability of aqueous phase now, be then also injected into 0.3PV gel-foam system, this two fill out sand tube 11 are sealed
After be put into 130 DEG C of insulating boxs and treat that it is gelled；Continue water drive after blocking agent gelling, determine aqueous and saturated core water respectively
Phase permeability simultaneously calculates the blocking agent and makes aqueous or saturated core permeability decrease degree.Experimental result is as shown in table 5.
The gel foam of table 5 is to aqueous and saturated core closure situation
It can be seen that by the experimental result in table 5：It can make under aqueous core permeability after injection gel-foam system gelling
Drop 93.20%, has preferable water blockoff ability；Make saturated core permeability decrease only 33.39%, it is poor to block up oily effect.
Although having been presented for some embodiments of the present invention herein, it will be appreciated by those of skill in the art that
Without departing from the spirit of the invention, the embodiments herein can be changed.Above-described embodiment be it is exemplary, no
Restriction that should be using the embodiments herein as interest field of the present invention.
Claims (3)
- A kind of 1. inorganic gel foam system, it is characterised in that comprising host, initiator, auxiliary agent and foaming agent, the host, The mass fraction of initiator, auxiliary agent and foaming agent is respectively 8%~12%, 2.11%~2.35%, 0.4%~0.5% and 0.3%~ 0.5%；The host is commercially available aluminium polychloride；The initiator is phosphoamide；The auxiliary agent is sodium sulphate；The foaming agent is a kind of anion-nonionic surfactant；The anion-nonionic surfactant is condition within 100000mg/L in 90 DEG C~150 DEG C, formation water salinity There is down preferable frothing capacity.
- 2. a kind of preparation method of the inorganic gel foam system as claimed in claim 1, it is characterised in that including such as Lower step：Host is added to the water dissolving in the ratio described in claim 1, according still further to the ratio described in claim 1 successively Initiator, auxiliary agent and foaming agent are added, stirs, obtains the inorganic gel foam system.
- 3. the application of inorganic gel foam system as claimed in claim 1, it is characterised in that：Available for high temperature and high salt oil deposit In transfer drive, the inorganic gel foam system is issued after rubber coagulates in oil reservoir hot conditions has higher intensity and preferably heat Stability, can selective shut-off high permeability formation.
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| CN107815301B (en) * | 2017-10-23 | 2020-07-17 | 中国石油大学(北京) | Micro-dispersed gel reinforced foam system and evaluation method |
| CN109356550A (en) * | 2018-12-24 | 2019-02-19 | 陕西明德石油科技有限公司 | Extra permeability oilfield selectivity frothy gel water plugging profile control agent |
| CN111980644B (en) * | 2019-05-23 | 2022-07-05 | 中国石油天然气股份有限公司 | Experimental system and method for evaluating air foam assisted steam flooding for heavy oil recovery |
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| CN103834376A (en) * | 2014-02-24 | 2014-06-04 | 中国石油大学(华东) | Self gas generation foam-gel profile control agent prepared from oilfield reinjection water as well as preparation method and application thereof |
| CN104152126A (en) * | 2014-07-24 | 2014-11-19 | 中国石油天然气股份有限公司 | Foam profile control system suitable for advanced profile control of oilfield and preparation method of foam profile control system |
| CN104178098A (en) * | 2014-08-01 | 2014-12-03 | 克拉玛依市正诚有限公司 | High-strength gel profile control and plugging agent as well as preparation method and application method thereof |
| CN104342095A (en) * | 2014-11-10 | 2015-02-11 | 中国石油大学(华东) | Expandable self-generated gas foam gel and preparation method and application thereof |
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- 2015-03-25 CN CN201510131275.3A patent/CN104745163B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834376A (en) * | 2014-02-24 | 2014-06-04 | 中国石油大学(华东) | Self gas generation foam-gel profile control agent prepared from oilfield reinjection water as well as preparation method and application thereof |
| CN104152126A (en) * | 2014-07-24 | 2014-11-19 | 中国石油天然气股份有限公司 | Foam profile control system suitable for advanced profile control of oilfield and preparation method of foam profile control system |
| CN104178098A (en) * | 2014-08-01 | 2014-12-03 | 克拉玛依市正诚有限公司 | High-strength gel profile control and plugging agent as well as preparation method and application method thereof |
| CN104342095A (en) * | 2014-11-10 | 2015-02-11 | 中国石油大学(华东) | Expandable self-generated gas foam gel and preparation method and application thereof |
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Application publication date: 20150701 Assignee: XINJIANG KELI NEW TECHNOLOGY DEVELOPMENT CO., LTD. Assignor: China Petroleum University (East China) Contract record no.: 2018370010034 Denomination of invention: Inorganic gel foam system and preparation method and application thereof Granted publication date: 20180202 License type: Common License Record date: 20181129 |
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