CN101885961A - Water plugging profile control agent - Google Patents
Water plugging profile control agent Download PDFInfo
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- CN101885961A CN101885961A CN 201010213636 CN201010213636A CN101885961A CN 101885961 A CN101885961 A CN 101885961A CN 201010213636 CN201010213636 CN 201010213636 CN 201010213636 A CN201010213636 A CN 201010213636A CN 101885961 A CN101885961 A CN 101885961A
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- profile control
- control agent
- rubber grain
- water plugging
- rubber particles
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Abstract
The invention relates to the field of profile control construction in an oil field extraction process, in particular to a water plugging profile control agent which comprises rubber particles and carrier fluid, wherein the rubber particles have the particle size of 0.02-0.08 mm and the concentration of 50-500mg/l. In the invention, because the deformation and the obdurability of the rubber particles ensure that the water plugging profile control agent is easier to enter a stratum, the plugging strength is higher, the rubber particles can be formed by physically crushing rubber plates or waste tires and the manufacture cost is relatively low. Meanwhile, the viscous-elastic behaviour of the rubber particles under high temperature can play a role of displacing oil while plugging a large pore path. Moreover, the rubber particles have the property without being influenced by mineralization and the heat stability without being influenced by salt content, can resist the high temperature of 120 DEG C, and can adapt to different mineralizations of oil deposit profile control requirements.
Description
Technical field
The present invention relates to the profile control construction field in the oil production technology of oil field, be specifically related to a kind of water plugging profile control agent.
Background technology
In the oil recovery field, the particle profile control technique is that amendment is pumped in stratum macropore or the crack, utilize " skeleton " effect in its physics ponding and the transport fluid system, reduce the rate of permeation of middle and high pervious course, improve the water-retaining capacity of low permeability pay, reach the purpose of adjusting intake profile, alleviating interlayer contradiction, thereby improve block dispensing effect, improve two, three class oil reservoir development degrees.
Because the particular surroundings on stratum, need amendment have high temperature resistant, salt tolerant, strong to ground adaptability, stop up characteristics such as macropore is effective, the profile control validity period is long, and its manufacturing cost is cheaper.
Summary of the invention
The present invention is in order to address the above problem, and a kind of with low cost, water plugging profile control agent that profile control effect is good is provided.
The present invention solves the technical scheme that its technical problem takes: a kind of water plugging profile control agent, comprise rubber grain and transport fluid, and the particle diameter of described rubber grain is 0.02-0.08mm, concentration is 50～500mg/l.
The particle diameter of described rubber grain can be 1/3～1/9 of throat radius.
Described concentration can be 100～300mg/l.
Described transport fluid can adopt the transport fluid that includes natural high moleculer eompound.
Described rubber grain can be to be processed through physical pulverization by rubber plate or junked tire.
Among the present invention, because deformability, the obdurability of rubber grain itself makes its easier stratum that enters, plugging strength is also higher, and rubber grain can utilize rubber plate or junked tire to form through physical pulverization, and manufacturing cost is also cheap relatively.Simultaneously, the viscous-elastic behaviour of rubber grain under hot conditions can play displacement of reservoir oil effect in macropore plugging.And the performance of rubber grain is not subjected to the influence of salinity, can resist 120 ℃ of high temperature, and thermostability is not subjected to the influence of saltiness, is fit to different salinity oil reservoir profile controls and transfer drive needs.Water plugging profile control agent of the present invention is to utilize transport fluid to carry rubber grain to enter the stratum, and constantly to the earth formation deep migration, utilizes the mechanical ponding of rubber grain itself in the migration process, the shutoff hole; Owing to the viscous-elastic behaviour of rubber grain under hot conditions, can be stranded in the stratum of different depths simultaneously, thereby realize the high strength shutoff.By injecting the rubber grain of various dose, can reach the purpose of deep and superficial part profile control.That water plugging profile control agent of the present invention has is high temperature resistant, salt tolerant, strong to ground adaptability, stop up advantages such as macropore is effective, the profile control validity period is long.
Description of drawings
Fig. 1 is a different concns water plugging profile control agent profile control effect evaluation experimental pressure gradient correlation curve;
Fig. 2 is a rubber grain deposition rate change curve in time;
Fig. 3 is the variation of injection pressure with the injection pore volume multiple;
Fig. 4 be in the model 1 water ratio with the variation of injection pore volume multiple;
Fig. 5 be in the model 2 water ratio with the variation of injection pore volume multiple;
Fig. 6 be in the model 3 water ratio with the variation of injection pore volume multiple.
Embodiment
Embodiment one: a kind of water plugging profile control agent, comprise transport fluid and rubber grain, and the particle diameter of described rubber grain is 0.08mm, concentration is 500mg/l.
Embodiment two: a kind of water plugging profile control agent, comprise transport fluid and rubber grain, and the particle diameter of described rubber grain is 0.02mm, concentration is 50mg/l.
Embodiment three: a kind of water plugging profile control agent, comprise transport fluid and rubber grain, and the particle diameter of described rubber grain is 0.04mm, concentration is 300mg/l.
Embodiment four: a kind of water plugging profile control agent, comprise transport fluid and rubber grain, and the particle diameter of described rubber grain is 0.06mm, concentration is 100mg/l.
Embodiment five: a kind of water plugging profile control agent, comprise transport fluid and rubber grain, and the particle diameter of described rubber grain is 0.05mm, concentration is 200mg/l.
Because the deformability of rubber grain own, obdurability make its easier stratum that enters, plugging strength is also higher, and rubber grain can utilize rubber plate or junked tire to form through physical pulverization, and manufacturing cost is also cheap relatively.Simultaneously, the viscous-elastic behaviour of rubber grain under hot conditions can play displacement of reservoir oil effect in macropore plugging.And the performance of rubber grain is not subjected to the influence of salinity, can resist 120 ℃ of high temperature, and thermostability is not subjected to the influence of saltiness, is fit to different salinity oil reservoir profile controls and transfer drive needs.Adopt the profile control process of water plugging profile control agent of the present invention, utilize transport fluid to carry rubber grain and enter the stratum, and, utilize the mechanical ponding of rubber grain itself in the migration process, the shutoff hole constantly to the earth formation deep migration; Owing to the viscous-elastic behaviour of rubber grain under hot conditions, can be stranded in the stratum of different depths simultaneously, thereby realize the high strength shutoff.
Wherein, the transport fluid that is adopted is the transport fluid that includes natural high moleculer eompound, because described natural high moleculer eompound has high tackifying ability, described rubber grain and transport fluid can supplement and complement each other, rubber grain can fully be suspended, in the stratum, can play the effect of " support " delivery rubber grain, the water plugging and profile controlling interaction energy of rubber grain is given full play to.
The particle diameter of described rubber grain is wanted evenly, geological condition in conjunction with the reality of the oil reservoir that will carry out deep profile controlling, determine the use particle diameter of rubber grain, be rubber grain particle diameter also will with the throat radius compatibility on stratum, when the particle diameter of rubber grain also satisfy simultaneously for throat radius 1/3～1/9 the time, it is best to stop up effect.Wherein, described throat radius is what record in geological exploration.
Below, estimate water plugging profile control agent water plugging and profile controlling effect of the present invention by a series of simulated experiments:
One, shutoff experiment
Employed rubber grain particle diameter is 0.08mm in this experiment, and adopt 500mg/l respectively, 300mg/l, 100mg/l, four kinds of concentration of 50mg/l detect pressure change in the whole injection process, as shown in fig. 1, be different concns water plugging profile control agent profile control effect evaluation experimental pressure gradient correlation curve, distinguish with multi-form lines among the figure, as can be seen from the figure, when amendment concentration is 500mg/l, injection pressure rises very fast, concentration 300mg/l, 100mg/l, during 50mg/l, its property annotated is all better, pressure rises mild, the breakthrough pressure gradient is about 0.2MPa/cm, follow-up water drive 0.5PV pressure promptly stable (PV is meant that the volume that injects subterranean amendment takes up an area of the multiple of total porosity down) calculates sealing ratiod all more than 90%, and sealing characteristics is higher, profile control effect is (calculation formula that sealing ratiod adopts those of ordinary skills to use always calculates, and repeats no more here) better.
Two, deposition rate experiment
In the deposition rate experiment, adopt the amendment of same particle diameter rubber grain preparation different concns, observe sedimentary starting time, Fig. 2 is a rubber grain deposition rate change curve in time, can find the change curve in time from deposition rate: starting time is roughly after 12 hours, and the high more easy more precipitation of concentration.
Three, the variation of injection pressure
High, medium and low rate of permeation rock core model has been adopted in the following table demonstration, and forward and backward water ratio of profile control and injection pressure change under same flow.
As can be seen from the above table, under same flow, injection pressure obviously improves, model 1,2, and in 3, injection pressure improves 3.69,6.14,27.50 times respectively.Fig. 3 is the variation of injection pressure with injection pore volume multiple (being the PV number), and injection pressure has had remarkable increase; After this shows that amendment injects rock core, shutoff crack and most permeable zone, the water drive resistance is increased; In addition, show that amendment adsorbs obstruction in rock core, diminish pore radius, permeability reduction.
Three, the variation of recovery ratio and water ratio
The following table demonstration has been adopted high, medium and low rate of permeation rock core model, the variation of recovery ratio and water ratio under the different amendment injection rates
Last table behind the profile control, in having employed, low permeability layer, makes the comprehensive recovery ratio of crude oil improve more than 5.25% than water drive as can be seen, improves 15.22% at most.From different rate of permeation baskets, the low permeability layer recovery ratio improves more than 3.91%, and permeability grade is big more, be that nonuniformity is strong more, low permeability layer recovery ratio increase rate is big more, and most permeable zone recovery ratio increase rate is more little, wherein, in No. 3 models of permeability grade maximum, the low permeability layer recovery ratio has improved 38.31%, and the most permeable zone recovery ratio only improves 4.80%.
Fig. 4～6 are respectively in the model 1,2,3 water ratio with the variation of injection pore volume multiple (being the PV number), and as can be known, the composite water cut behind the profile control reduces more than 3.83% before than profile control, can reduce 37.04%. at most in same Fig. 4～6.Change from each layer water ratio, the most permeable zone water ratio reduces significantly, and wherein No. 2 rock core model most permeable zone water ratio reductions are 82.38% to the maximum, and all the other 2 model water ratio reduce more than 11.92%; Middle pervious course water ratio increases in model 1 0.64%, and water ratio all reduces more than 2.38% in all the other 2 models; And low permeability layer is not because moisture or water ratio is lower before the profile control, and water ratio is in rising trend behind the profile control.
Five, the variation of relative injectivity
Relative injectivity one hurdle from last table, behind the profile control, in, the low permeability layer relative injectivity obviously rises, the low permeability layer relative injectivity improves more than 19.73% before than profile control, in the pervious course relative injectivity improve more than 5.63%, and the most permeable zone relative injectivity reduces more than 31.83% before than profile control.Permeability grade is big more, and the low permeability layer relative injectivity improves, the most permeable zone relative injectivity reduces that amplitude is big more, and this is tending towards evenly each layer relative injectivity, in having improved, the development degree of low permeability layer, has reached the purpose of profile control.
From top experiment, can reach a conclusion, because rubber grain itself has deformability, obdurability, high temperature resistant, anti-high salt, the profile control validity period is long, cost is low, just makes it all have unique distinction in many-side.For the bigger zigzag cracks that in the leak stopping process, runs into, stitch wide less zigzag cracks, pattern cracking, and the macropore that oozes of the height that in water plugging and profile controlling, runs into and hypotonic little duct, as long as the throat radius compatibility on particle grain size and stratum, be that grain diameter is 1/3 of throat radius～1/9 o'clock, can both reach and stop up effect preferably.In addition, water plugging profile control agent can make that each layer relative injectivity is tending towards evenly in the stratum, in having improved, the development degree of low permeability layer, has reached the purpose of profile control.Therefore water plugging profile control agent is a kind of being worth further to promote the water plugging profile control agent that cost performance is higher.
More than water plugging profile control agent provided by the present invention is described in detail, used specific case herein principle of the present invention and embodiment set forth, the explanation of above embodiment just is used for help understanding method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (5)
1. water plugging profile control agent, it is characterized in that: comprise rubber grain and transport fluid, the particle diameter of described rubber grain is 0.02-0.08mm, and concentration is 50～500mg/l.
2. water plugging profile control agent according to claim 1 is characterized in that: the particle diameter of described rubber grain is 1/3～1/9 of a throat radius.
3. water plugging profile control agent according to claim 1 is characterized in that: described concentration is 100～300mg/l.
4. according to claim 1 or 2 or 3 described water plugging profile control agents, it is characterized in that: described transport fluid adopts the transport fluid that includes high molecular polymer.
5. according to claim 1 or 2 or 3 described water plugging profile control agents, it is characterized in that: described rubber grain is to be processed through physical pulverization by rubber plate or junked tire.
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| CN 201010213636 CN101885961A (en) | 2010-06-30 | 2010-06-30 | Water plugging profile control agent |
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| CN 201010213636 CN101885961A (en) | 2010-06-30 | 2010-06-30 | Water plugging profile control agent |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102191025A (en) * | 2011-04-11 | 2011-09-21 | 大庆石油管理局 | Broad-spectrum deformable while-drilling leak-proof sealing agent |
| CN106010490A (en) * | 2016-07-27 | 2016-10-12 | 大港油田集团有限责任公司 | Profile control agent for underground foamed rubber |
| CN106957642A (en) * | 2016-11-28 | 2017-07-18 | 青岛科技大学 | Polymer waste recycles technique in a kind of preparation from suspended prop |
| CN114045162A (en) * | 2021-11-29 | 2022-02-15 | 中国石油天然气股份有限公司 | Salt-tolerant flexible plugging-regulating polymer particle and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO1998053181A1 (en) * | 1997-05-23 | 1998-11-26 | Exxon Production Research Company | Oil recovery method using an emulsion |
| CN1760312A (en) * | 2005-10-10 | 2006-04-19 | 边素洁 | Water shut-off material of plant for oil field |
| CN101314711A (en) * | 2008-07-18 | 2008-12-03 | 中国石油大学(华东) | Elastic particle oil displacement profile control agent, displacement of reservoir oil system and displacement of reservoir oil method |
| CN101451061A (en) * | 2008-12-30 | 2009-06-10 | 山东大学 | Sand consolidation and water plugging profile control agent made by oil sand |
-
2010
- 2010-06-30 CN CN 201010213636 patent/CN101885961A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998053181A1 (en) * | 1997-05-23 | 1998-11-26 | Exxon Production Research Company | Oil recovery method using an emulsion |
| CN1760312A (en) * | 2005-10-10 | 2006-04-19 | 边素洁 | Water shut-off material of plant for oil field |
| CN101314711A (en) * | 2008-07-18 | 2008-12-03 | 中国石油大学(华东) | Elastic particle oil displacement profile control agent, displacement of reservoir oil system and displacement of reservoir oil method |
| CN101451061A (en) * | 2008-12-30 | 2009-06-10 | 山东大学 | Sand consolidation and water plugging profile control agent made by oil sand |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102191025A (en) * | 2011-04-11 | 2011-09-21 | 大庆石油管理局 | Broad-spectrum deformable while-drilling leak-proof sealing agent |
| CN106010490A (en) * | 2016-07-27 | 2016-10-12 | 大港油田集团有限责任公司 | Profile control agent for underground foamed rubber |
| CN106010490B (en) * | 2016-07-27 | 2019-07-12 | 大港油田集团有限责任公司 | A kind of underground blown rubber profile control agent |
| CN106957642A (en) * | 2016-11-28 | 2017-07-18 | 青岛科技大学 | Polymer waste recycles technique in a kind of preparation from suspended prop |
| CN114045162A (en) * | 2021-11-29 | 2022-02-15 | 中国石油天然气股份有限公司 | Salt-tolerant flexible plugging-regulating polymer particle and preparation method thereof |
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Application publication date: 20101117 |