CN105505372A - Sand prevention and water reduction proppant particles and preparing method thereof - Google Patents
Sand prevention and water reduction proppant particles and preparing method thereof Download PDFInfo
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- CN105505372A CN105505372A CN201510998233.XA CN201510998233A CN105505372A CN 105505372 A CN105505372 A CN 105505372A CN 201510998233 A CN201510998233 A CN 201510998233A CN 105505372 A CN105505372 A CN 105505372A
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- proppant particles
- resin
- sand
- sand control
- precipitation
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/80—Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open
- C09K8/805—Coated proppants
Abstract
The invention provides sand prevention and water reduction proppant particles and a preparing method thereof. The sand prevention and water reduction proppant particles comprise quartz sand core particles and resin coating films which cover the surfaces of the quartz sand core particles and are rich in portland cement clinker. The resin coating films rich in portland cement clinker are formed by mixing a mixture A with a resin solution. The mixture A contains portland cement clinker, and the mass ratio of quartz sand core particles to portland cement clinker to resin is (18-22) : (9-11) : (2-4). The sand prevention and water reduction proppant particles are a particle composite material which has high hydrophilia and can be consolidated, oil-water flow selective permeation is high, a water flow preferential migration passage is blocked by sand prevention and water reduction proppant particles in a proper particle size according to the size of a duct and the water outlet condition of an oil and gas well, water direction is changed, and then the water content of the oil and gas well is reduced.
Description
Technical field
The invention belongs to oil recovery technique field, especially relate to a kind of sand control precipitation proppant particles and preparation method thereof.
Background technology
Coastal oil field major part block belongs to loose sand oil accumulation, and bury shallow, shale index is high, loose cementation, poor diagenetic grade, shakes out serious, greatly have impact on the normal development and production in oil field.Especially oil-field development is to middle and later periods moisture rising, the oil reservoir cementing matter based on clay, and water-swellable fluffs loose, and consolidation strength reduces, and then particle displacement occurs, and greatly aggravates formation sand production degree.The mode of production of large pump extract or excessive working system, causes too high drawdown pressure also can cause aggravation of shaking out simultaneously.And shake out in a large number along with producing oil reservoir, there is formation collapse and form macropore, cause High water cut even water logging further.What this result was brought to development is vicious cycle, and water outlet and the aggravation of too high drawdown pressure are shaked out, and shakes out in a large number and aggravate High water cut.
Loose sand oil accumulation enters into ultra-high water-containing production phase, proposes new requirement to anti-sand process technology.Current formation depletion is serious, and oil reservoir forms macropore, and reservoir temperature generally reduces, and causes the solution-type such as resin solution, sand stabilization agent sand-preventing process inapplicable; The artificial borehole wall class sand-preventing process such as the pre-burnt-in sand of plastics, have certain precipitation effect, have easy construction simultaneously, pit shaft does not stay the feature of operating tool string, but comparatively mechanical sand control is low due to its consolidation strength, is not suitable for large pressure reduction extract and produces, make it apply and be restricted.
Therefore study and a kind ofly there is very strong wetting ability and self the granule type precipitation sand control matrix material of consolidation can seem particularly important for the tail period of loose sand oil accumulation.Only develop suitable sand control product and Technology of forming a complete and comprehensive system for collecting real estate fees, current high water-cut stage Oil/gas Well sand control requirements of one's work could be met.
Summary of the invention
In view of this, the present invention is intended to propose a kind of sand control precipitation proppant particles and preparation method thereof, to solve the sand control problem of mid-late oilfield development High water cut sand output well.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of sand control precipitation proppant particles, comprise quartz sand slug particle and be coated on the resin-coated film being rich in Portland clinker on quartz sand slug particle surface, the described resin-coated film being rich in Portland clinker is mixed to form by mixture A and resin solution, described mixture A includes Portland clinker, and the ratio of quality and the number of copies of described quartz sand slug particle, Portland clinker, resin is (18-22): (9-11): (2-4).
Further, described resin is unsaturated polyester resin.
Further, the thickness of described resin-coated film is 0.1-0.2mm.
Further, also include precipitation agent in described mixture A, the ratio of quality and the number of copies of described precipitation agent and Portland clinker is (1-3): 10.
Preferably, the ratio of quality and the number of copies of described precipitation agent and Portland clinker is 1:5.
Preferably, described precipitation agent is preferably polyacrylamide.
Further, be added with machine silane coupling agent in described resin solution, the ratio of quality and the number of copies of described organo-silicon coupling agent and resin is (1-3): 100.
Preferably, the ratio of quality and the number of copies of described organo-silicon coupling agent and resin is 1:50.
Preferably, described organo silane coupling agent is silane coupling agent KH560, silane coupling agent DL602 or silane coupling agent KH792.
Further, be also added with thinner in described resin solution, the ratio of quality and the number of copies of described thinner and resin is (1-3): 10.
Preferably, the ratio of quality and the number of copies of described thinner and resin is 1:5.
Preferably, described thinner is methyl alcohol.
Further, described resin is unsaturated polyester resin.
Further, the particle diameter of described quartz sand slug particle is 0.4-0.6mm or 0.6-1.2mm.Wherein said particle diameter is that the quartz sand slug particle correspondence of 0.4-0.6mm obtains the sand control precipitation proppant particles that particle diameter is 0.5-0.8mm, and particle diameter is that 0.6-1.2mm quartz sand slug particle correspondence obtains the sand control precipitation proppant particles that particle diameter is 0.7-1.4mm.
Further, the circularity of described sand control precipitation proppant particles and sphericity are all more than 0.7.
The present invention also provides a kind of preparation method of above-mentioned sand control precipitation proppant particles, it is characterized in that: comprise the steps:
Step one: Portland clinker is put into agitator and stirs, adds polyacrylamide afterwards and continues to stir, obtained mixture A after stirring;
Step 2: unsaturated polyester resin is added in agitator and stirs, then add organo silane coupling agent and thinner, it is stand-by to stir into uniform resin solution;
Step 3: quartz sand slug particle is put into sand mill and stirs, after stirring, the resin solution that step 2 is obtained is added in sand mill and continue to stir, make resin solution fully be coated on the surface of quartz sand slug particle, then add the obtained mixture A of step one and continue to stir, the quartz sand slug particle surface making it evenly be wrapped in coated with resins solution, then naturally dry, fragmentation, sieves, and obtains sand control precipitation proppant particles product.
Relative to prior art, a kind of sand control precipitation proppant particles of the present invention has following advantage:
(1) sand control precipitation proppant particles of the present invention is have very strong wetting ability and self can the granule type matrix material of consolidation, there is good profit flowing permselective property, aqueous condition is gone out for the size in duct and Oil/gas Well, select to adapt the sand control precipitation proppant particles shutoff current predominant pathway of particle diameter, change the direction of a stream of water, thus reduce Oil/gas Well water ratio;
(2) when applying sand control precipitation proppant particles of the present invention construction, adopt and first clamp-on appropriate sand control precipitation proppant particles product, then gravel filling sand prevention construction is carried out, after construction, sand control precipitation proppant particles self consolidation when not polluted reservoir forms plugged zone, the current advantage duct that shutoff is formed because of injection water or edge-bottom water, pack gravel and screen casing form the sand block band of high water conservancy diversion, playing can effectively sand control again can the double effects of effective precipitation, realize sand control, the dual function of precipitation, meet the Production requirement of high water-cut stage,
(2) sand control precipitation proppant particles of the present invention effectively can reduce understressed sand oil field high water-cut stage Oil/gas Well water ratio, and technique is simple, is easy to grasp, safe and reliable, satisfactory for result.
Embodiment
Unless otherwise indicated, term used herein all has the implication that those skilled in the art's routine is understood, and for the ease of understanding the present invention, terms more used herein has been carried out following definitions.
All Digital IDs, such as pH, temperature, time, concentration, comprise scope, is all approximation.Understand, although not always clear and definite describe all Digital IDs before all add term " about ".Also will understand, describe although always not clear and definite, reagent described herein is only example, and its Equivalent is known in the art simultaneously.
The present invention is described in detail below in conjunction with specific embodiment.
Embodiment 1
Prepare the method that particle diameter is the sand control precipitation proppant particles of 0.5-0.8mm, comprise the steps:
Step one: 200g Portland clinker is put into agitator and stirs, adds 40g polyacrylamide afterwards and continues to stir, stand-by after stirring.
Step 2: added in agitator by 100g unsaturated polyester resin and stir, then the organo silane coupling agent and 20g methyl alcohol that add that 2g model is KH560, it is stand-by to stir into uniform resin solution.
Step 3: be that 0.4-0.6mm quartz sand slug particle is put into sand mill and stirred by 600g particle diameter, after stirring, the resin solution taking 110g step 2 obtained adds in sand mill, continue to stir, resin solution is made fully to apply the surface with quartz sand slug particle, then add the obtained Portland clinker containing polyacrylamide of 240g step one to continue to stir, it is made evenly to be wrapped in the quartz sand wicking surface of coated with resins solution, then naturally dry, broken, sieve, obtain the sand control precipitation proppant particles product that particle diameter is 0.5-0.8mm.The sand control precipitation proppant particles product circularity that aforesaid method obtains and sphericity are about 0.75.
Embodiment 2
Prepare the method that particle diameter is the sand control precipitation proppant particles of 0.7-1.4mm, comprise the steps:
Step one: 900g Portland clinker is put into agitator and stirs, adds 270g polyacrylamide afterwards and continues to stir, stand-by after stirring.
Step 2: preparation resin solution
Added in agitator by 300g unsaturated polyester resin and stir, then add the organo silane coupling agent and 90g thinner methyl alcohol that 9g model is DL602, it is stand-by to stir into even resin solution.
Step 3: be that 0.6-1.2mm quartz sand slug particle is put into sand mill and stirred by 1800g particle diameter, after stirring, take the obtained resin solution of 1170g step 2 and add continuation stirring in sand mill, resin solution is made fully to apply the surface with quartz sand slug particle, then add the obtained Portland clinker containing polyacrylamide of 390g step one to continue to stir, make it evenly be wrapped in be coated with the quartz sand slug particle surface of resin solution, then naturally dry, broken, sieve, obtaining particle diameter is 0.7-1.4mm sand control precipitation proppant particles product.The sand control precipitation proppant particles product circularity that aforesaid method obtains and sphericity are about 0.80.
By the sand control precipitation proppant particles product application obtained by embodiment 1 in the construction of Oil/gas Well sand control measure, by normal experiment and test in place, the precipitation sand-proof function of the present invention in sand control measure is described.1, conventionally test
(1) sand control precipitation proppant particles 27g is taken, add sand-carrying agent, sample is fully soaked, stir, load artificial rock core mould, after simulated formation temperature maintenance 72h, the artificial rock core made by taking-up, test its ultimate compression strength and liquid infiltration rate respectively with electronic tension tester and core flow test instrument, concrete testing data sees the following form:
The performance test results of the artificial rock core of table 1 containing sand control precipitation proppant particles of the present invention
| Sequence number | Ultimate compression strength MPa | Liquid infiltration rate μm 2 |
| 1 | 3.5 | 0.61 |
| 2 | 3.3 | 0.74 |
| 3 | 3.8 | 0.52 |
The artificial borehole wall that the sand control precipitation proppant particles that the visible aforesaid method of testing data on this in table obtains is formed in Oil/gas Well has certain intensity and rate of permeation, can play and prevent formation sand production, effectively reduces the effect of Oil/gas Well water ratio.
(2) sand control precipitation proppant particles 30g is taken, add sand-carrying agent, sample is fully soaked, stirs, load artificial rock core mould, simulated formation temperature maintenance 72h, take quartz sand slug particle 30g again, load artificial rock core mould, with kerosene, throughput ratio is carried out comparatively to two kinds of granuloplastic artificial rock cores respectively by clear water, thus judge the characteristic that its oil impregnate blocks water, concrete testing data sees the following form:
Table 2 quartz sand slug particle and sand control precipitation proppant particles oil impregnate block-water performance of the present invention contrast
This tests artificial borehole wall that sand control precipitation proppant particles that visible aforesaid method obtains formed in Oil/gas Well can play the effect that oil impregnate blocks water, thus realizes the precipitation sand controlling result of Oil/gas Well.
2, test in place
The sand control precipitation proppant particles product above-mentioned method obtained is that 10 Oil/gas Wells such as Chinese and Western 34-13-2, western 8-12-2 carry out the secondary test in place of 10 wells to Dagang Oilfield pound sign, continuously tested 180d, average individual well daily oil production increases 2.5t, average individual well water content is down to 72% by 92.4%, moisture reduction about 20%, concrete testing data sees the following form:
Table 3 sand control precipitation of the present invention proppant particles field test data
Testing data from above-mentioned: be applied in Oil/gas Well sand control measure by sand control precipitation proppant particles of the present invention, can play and prevent formation sand production, effectively reduces Oil/gas Well water ratio, has significant economic benefit.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a sand control precipitation proppant particles, it is characterized in that: this proppant particles comprises quartz sand slug particle and is coated on the resin-coated film being rich in Portland clinker on quartz sand slug particle surface, the described resin-coated film being rich in Portland clinker is mixed to form by mixture A and resin solution, described mixture A includes Portland clinker, and the ratio of quality and the number of copies of described quartz sand slug particle, Portland clinker, resin is (18-22): (9-11): (2-4).
2. sand control precipitation proppant particles according to claim 1, is characterized in that: the thickness of described resin-coated film is 0.1-0.2mm.
3. sand control precipitation proppant particles according to claim 1 and 2, is characterized in that: also include precipitation agent in described mixture A, the ratio of quality and the number of copies of described precipitation agent and Portland clinker is (1-3): 10; Preferably, the ratio of quality and the number of copies of described precipitation agent and Portland clinker is 1:5.
4. sand control precipitation proppant particles according to claim 1 and 2, is characterized in that: be added with machine silane coupling agent in described resin solution, and the ratio of quality and the number of copies of described organo-silicon coupling agent and resin is (1-3): 100; Preferably, the ratio of quality and the number of copies of described organo-silicon coupling agent and resin is 1:50.
5. the sand control precipitation proppant particles described in claim 1 or 2, is characterized in that: be also added with thinner in described resin solution, and preferably, described thinner is methyl alcohol; The ratio of quality and the number of copies of described thinner and resin is (1-3): 10; Preferably, the ratio of quality and the number of copies of described thinner and resin is 1:5.
6. sand control precipitation proppant particles according to claim 3, is characterized in that: described precipitation agent is polyacrylamide.
7. sand control precipitation proppant particles according to claim 1 and 2, is characterized in that: described resin is unsaturated polyester resin.
8. sand control precipitation proppant particles according to claim 1, is characterized in that: the particle diameter of described quartz sand slug particle is 0.4-0.6mm or 0.6-1.2mm.
9. sand control precipitation proppant particles according to claim 1, is characterized in that: the circularity of described sand control precipitation proppant particles and sphericity are all more than 0.7.
10. a preparation method for the sand control precipitation proppant particles in claim 1-9 described in arbitrary claim, is characterized in that: comprise the steps:
Step one: Portland clinker is put into agitator and stirs, adds polyacrylamide afterwards and continues to stir, obtained mixture A after stirring;
Step 2: unsaturated polyester resin is added in agitator and stirs, then add organo silane coupling agent and thinner, it is stand-by to stir into uniform resin solution;
Step 3: quartz sand slug particle is put into sand mill and stirs, after stirring, the resin solution that step 2 is obtained is added in sand mill and continue to stir, make resin solution fully be coated on the surface of quartz sand slug particle, then add the obtained mixture A of step one and continue to stir, the quartz sand slug particle surface making it evenly be wrapped in coated with resins solution, then naturally dry, fragmentation, sieves, and obtains sand control precipitation proppant particles product.
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| US20160304398A1 (en) * | 2013-12-04 | 2016-10-20 | Wellcem As | Sealant Material for Subterranean Wells |
| CN106047322A (en) * | 2016-06-03 | 2016-10-26 | 唐山市金沙工贸有限公司 | Locating high-strength blocking crack deflection fracturing resin coated sand and application process technology |
| CN109694703A (en) * | 2017-10-20 | 2019-04-30 | 中国石油天然气股份有限公司 | Oil gas water well sand control pack grain and preparation method thereof and use technique |
| CN110423603A (en) * | 2019-06-25 | 2019-11-08 | 中国石油大学(北京) | A kind of overlay film automatically cleaning proppant and its preparation method and application |
| CN112696178A (en) * | 2019-10-23 | 2021-04-23 | 中国石油天然气股份有限公司 | Sand prevention and precipitation method for high-water-content oil well |
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Application publication date: 20160420 |