CN103484095B - Fracturing inclusion self-dissolving diversion agent and preparation method thereof - Google Patents
Fracturing inclusion self-dissolving diversion agent and preparation method thereof Download PDFInfo
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- CN103484095B CN103484095B CN201310472841.8A CN201310472841A CN103484095B CN 103484095 B CN103484095 B CN 103484095B CN 201310472841 A CN201310472841 A CN 201310472841A CN 103484095 B CN103484095 B CN 103484095B
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- diversion agent
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- inclusion
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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
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/70—Compositions for forming crevices or fractures characterised by their form or by the form of their components, e.g. foams
- C09K8/706—Encapsulated breakers
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/26—Gel breakers other than bacteria or enzymes
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- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The invention relates to a fracturing inclusion self-dissolving diversion agent and a preparation method thereof. The diversion agent is prepared by using 10-15 parts of guanidine collagen powder, 30-40 parts of ferric trichloride, 30-40 parts of alumina, 1-2 parts of sodium bicarbonate, 8-10 parts of ammonium persulfate, 1-2 parts of potassium ferricyanide and 1 part of gamma-aminopropyltriethoxysilane, has an inclusion form and is spherically granular in shape. The preparation method of the diversion agent comprises the following steps: sequentially dissolving the guanidine collagen powder, the ferric trichloride, the alumina, the sodium bicarbonate, the ammonium persulfate and the potassium ferricyanide in water according to above formula proportions at room temperature, stirring for 5min, carrying out drying caking of the above obtained solution, crushing, milling, spraying the surface of ammonium persulfate with the gamma-aminopropyltriethoxysilane coupling agent, wrapping the external layer of ammonium persulfate crystals by the above prepared powder to form spherical particles, and drying the particles to prepare the diversion agent. The diversion agent has a gel breaker inclusion form, has a self-dissolving capability, and does not need a gel breaking degradation agent in the construction.
Description
Technical field
The present invention relates to a kind of inclusion of wellfracturing from dissolving diversion agent and preparation method thereof.
Background technology
Conventional fracturing fracture generally extends along orientation of principal stress, and affect by injection-production pattern, fracture penetration can not excessively increase, therefore conventional fracturing reform reservoir volume is limited.In order to increase oil well drainage area, adopting turnaround fracture technology, crack can be pressed off when injection-production pattern is constant along other direction, thus improve oil well output.And the enforcement turnaround fracture of the quality of diversion agent performance to success has conclusive effect.
Diversion agent conventional at present has: suspension diversion agent, and its shortcoming is that shutoff efficiency is low, can not form filter cake because action of turbulent flow and borehole distortion are difficult to be formed very large pressure drag; Underground crosslinked type diversion agent, its shortcoming is that low dose does not reach required pressure, heavy dose of then can form new injury, although can form filter cake underground reaction instability not reach desirable strength; The particle diverting agent that ground is once cross-linked, its feature is that self-strength is large, but shutoff efficiency is low, and fracturing fluid leak amount is large; Shutoff bead diversion agent, its feature is that intensity is large, and be out of shape little, but it easily comes off, shutoff efficiency is low, cannot from degraded.
Summary of the invention
The object of this invention is to provide a kind of high strength, shutoff efficiency is high, have and certainly dissolve diversion agent and preparation method thereof from the pressure break inclusion of degradation capability.
Technical scheme of the present invention is: a kind of pressure break inclusion is from dissolving diversion agent, it is characterized in that: it is formulated by the γ-aminopropyl triethoxysilane of the guanidine collagen powder of 10-15 parts, the iron trichloride of 30-40 parts, 30-40 parts of aluminium sesquioxides, 1-2 parts of sodium bicarbonates, 8-10 parts of ammonium persulphates, 1-2 parts of Tripotassium iron hexacyanides and 1 part, diversion agent is interior parcel form, particulate state spherical in shape.
Described guanidine collagen powder is molecular weight is that the white of 20 ~ 300,000 is to light tan free flowing powder.
Described ammonium persulphate is white tasteless crystal grain form, and particle diameter is 40 ~ 60 orders.
Described pressure break inclusion from dissolve the preparation of diversion agent be at ambient temperature according to formula rate by guanidine collagen powder, iron trichloride, aluminium sesquioxide, sodium bicarbonate, the water-soluble stirring of the Tripotassium iron hexacyanide 5 minutes, afterwards caking is dried to solution, and smashed abrasive dust, afterwards by ammonium persulphate surface spray γ-aminopropyl triethoxysilane, the powder produced is deposited with and is wrapped in ammonium persulphate crystal skin formation spherical particle.
What the granulating of described diversion agent particle adopted is convective boiling granulation technique.
The particle diameter of described diversion agent particle is 20 orders.
Described diversion agent is direct by adding sand car mixed water injection in applying at the scene, without the need to gel breaker and other extra supplementary additive.
All there is sale in above-mentioned chemical reagent market.
Advantage of the present invention:
1. this diversion agent from dissolving, all can be discharged by the row's of returning technique after dissolving.
2. this diversion agent is from interior by outer dissolving, and can not result in blockage because extra-granular is instant effect premature failure, and shutoff efficiency is high.
3. the plugging strength of this diversion agent is high, and show through Lab-evaluation test, this diversion agent blocks intensity under 50 DEG C of conditions can reach 35 ~ 60MPa.
4. this diversion agent uniform particle sizes and be round granular, is easy in construction to inject at the scene and easily filling is high oozes crack.
5. this diversion agent site operation is simple, without the need to optional equipment gel breaker.
6. gel breaker utilization ratio is high, can not formation damage.
Below in conjunction with embodiment, the present invention is described further, but not as the restriction to technical scheme of the present invention.
embodiment
Embodiment 1
Under room temperature 20 DEG C of conditions, by 15g guanidine collagen powder, 35g iron trichloride, 35g aluminium sesquioxide, 2g sodium bicarbonate and the 2g Tripotassium iron hexacyanide are placed in 200ml water and stir, Keep agitation mixed serum 5 minutes, dry 40 minutes under afterwards slurries being placed in stoving oven 100 DEG C of temperature condition, obtain caking materials, and adopt pulverizing mill to be broken into 40 ~ 50 μm of powder, with the form of spraying, 1g γ-aminopropyl triethoxysilane coupling agent is attached to 40 ~ 60 order 10g ammonium persulphate crystal grain surfaces at fluid bed granulator inlet end afterwards, then convection type is adopted fully to contact with powder the crystal grain being attached with coupling agent, make powder adherence on the surface of this crystal grain and form spherical particle, finally dry and obtain the diversion agent of interior parcel form, particle diameter is 20 orders.
Described guanidine collagen powder is molecular weight is that the white of 20 ~ 300,000 is to light tan free flowing powder, the melon glue of molecular weight is easily degraded after formation diversion agent, this guanidine collagen powder is purchased from Kunshan Beijing-Kunming oilfield chemistry Science and Technology Ltd., postcode: 215300, address: Kun Tai road, Jiangsu Province, China city of Kunshan.Described ammonium persulphate is the tasteless crystal grain form of 40-60 order white, and the ammonium persulphate of this particle diameter can make diversion agent reach 20 orders after attached to powder, and the diversion agent of this particle diameter is easy to enter crack.Described γ-aminopropyl triethoxysilane is a kind of silane coupling agent, mainly plays adhesive attraction.
Embodiment 2
Under room temperature 20 DEG C of conditions, by 15g guanidine collagen powder, 40g iron trichloride, 32g aluminium sesquioxide, 1g sodium bicarbonate and the 2g Tripotassium iron hexacyanide are placed in 200ml water and stir, Keep agitation mixed serum 5 minutes, dry 30 minutes under afterwards slurries being placed in stoving oven 100 DEG C of temperature condition, obtain caking materials, and adopt pulverizing mill to be broken into 40 ~ 50 μm of powder, with the form of spraying, 1g γ-aminopropyl triethoxysilane coupling agent is attached to 40 ~ 60 order 9g ammonium persulphate crystal grain surfaces at fluid bed granulator inlet end afterwards, then convection type is adopted fully to contact in particle and powder, make powder adherence at plane of crystal, finally dry and can prepare.
Embodiment 3
Under room temperature 20 DEG C of conditions, by 15g guanidine collagen powder, 32g iron trichloride, 40g aluminium sesquioxide, 2g sodium bicarbonate and the 1g Tripotassium iron hexacyanide are placed in 200ml water and stir, Keep agitation mixed serum 5 minutes, dry 40 minutes under afterwards slurries being placed in stoving oven 100 DEG C of temperature condition, obtain caking materials, and adopt pulverizing mill to be broken into 40 ~ 50 μm of powder, with the form of spraying, 1g γ-aminopropyl triethoxysilane coupling agent is attached to 40 ~ 60 order 9g ammonium persulphate crystal grain surfaces at fluid bed granulator inlet end afterwards, then convection type is adopted fully to contact with powder the crystal grain being attached with coupling agent, make powder adherence on the surface of this crystal grain and form spherical particle, finally dry and obtain the diversion agent of interior parcel form, particle diameter is 20 orders.
Described guanidine collagen powder to be molecular weight the be white of 20 ~ 300,000 is to light tan free flowing powder, and this guanidine collagen powder is purchased from Kunshan Beijing-Kunming oilfield chemistry Science and Technology Ltd., postcode: 215300, address: Kun Tai road, Jiangsu Province, China city of Kunshan.Described ammonium persulphate is white tasteless crystal grain form.Described γ-aminopropyl triethoxysilane is a kind of silane coupling agent, mainly plays adhesive attraction.
Embodiment 4
The diversion agent adopting embodiment 1 to make is at Yanchang Oilfield Zi Bei oil recovery factory ZBX-5 well long 6
1test in place has been carried out in layer position, and diversion agent is direct by adding sand car mixed water injection in applying at the scene, without the need to gel breaker and other extra supplementary additive.It is 29MPa that site operation result shows the broken pressure in this layer of position, boost after adding diversion agent for the first time 8MPa, illustrate that microfracture access opening feature is fairly obvious, boost after second time adds diversion agent 2MPa, illustrate that stratum major fracture far-end microfracture is opened, adopt this diversion agent can block high seepage channel significantly, open stratum microfracture, plugging effect is obvious, and this well production rate compares same layer position offset well volume increase 15.2%.
Embodiment 5
The diversion agent adopting embodiment 2 to make is at Yanchang Oilfield Ansai oil recovery factory ASX-1 well long 6
1test in place has been carried out in layer position, and diversion agent is direct by adding sand car mixed water injection in applying at the scene, without the need to gel breaker and other extra supplementary additive.Boost after the display of field experiment result adds this diversion agent 10MPa, and plugging effect is obvious, and this well production rate compares same layer position offset well volume increase 28.6%, and effect of increasing production is obvious.
Embodiment 6
The diversion agent adopting embodiment 3 to make is at Yanchang Oilfield Ansai oil recovery factory ASX-1 well long 6
1test in place has been carried out in layer position, and diversion agent is direct by adding sand car mixed water injection in applying at the scene, without the need to gel breaker and other extra supplementary additive.Boost after the display of field experiment result adds this diversion agent 10MPa, and plugging effect is obvious, and this well production rate compares same layer position offset well volume increase 26%, and effect of increasing production is obvious.
Diversion agent of the present invention is solid spherical particles shape, the packed placement of normal temperature lower seal.Be applicable to oil well turnaround fracture use.
Adopt convective boiling granulation technique to belong to known technology in embodiment, be not described in detail here.Involved reagent all can be buied from the market.
Diversion agent of the present invention is parcel form in gel breaker, self has from dissolving power, and add gel breaking agent without the need to extra in construction, on-site construction operations is simplified, and shut-off capacity is strong, utilization ratio is high; Simultaneously because shape is evenly convenient to well note.
Claims (5)
1. a pressure break inclusion is from dissolving diversion agent, it is characterized in that: it is formulated by the γ-aminopropyl triethoxysilane of the guanidine collagen powder of 10-15 parts, the iron trichloride of 30-40 parts, 30-40 parts of aluminium sesquioxides, 1-2 parts of sodium bicarbonates, 8-10 parts of ammonium persulphates, 1-2 parts of Tripotassium iron hexacyanides and 1 part, diversion agent is interior parcel form, particulate state spherical in shape; Described pressure break inclusion from dissolve the preparation of diversion agent be at ambient temperature according to formula rate by guanidine collagen powder, iron trichloride, aluminium sesquioxide, sodium bicarbonate, the water-soluble stirring of the Tripotassium iron hexacyanide 5 minutes, afterwards caking is dried to solution, and smashed abrasive dust, afterwards by ammonium persulphate surface spray γ-aminopropyl triethoxysilane, the powder produced is deposited with and is wrapped in ammonium persulphate crystal skin formation spherical particle; The particle diameter of described diversion agent particle is 20 orders.
2. a kind of pressure break inclusion according to claim 1 is from dissolving diversion agent, it is characterized in that: described guanidine collagen powder is molecular weight is that the white of 20 ~ 300,000 is to light tan free flowing powder.
3. a kind of pressure break inclusion according to claim 1 is from dissolving diversion agent, it is characterized in that: described ammonium persulphate is white tasteless crystal grain form, and particle diameter is 40 ~ 60 orders.
4. a kind of pressure break inclusion according to claim 1 is from dissolving diversion agent, it is characterized in that: what the granulating of described diversion agent particle adopted is convective boiling granulation technique.
5. a kind of pressure break inclusion according to claim 1 is from dissolving diversion agent, it is characterized in that: described diversion agent is direct by adding sand car mixed water injection in applying at the scene, without the need to gel breaker and other extra supplementary additive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310472841.8A CN103484095B (en) | 2013-10-11 | 2013-10-11 | Fracturing inclusion self-dissolving diversion agent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310472841.8A CN103484095B (en) | 2013-10-11 | 2013-10-11 | Fracturing inclusion self-dissolving diversion agent and preparation method thereof |
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| Publication Number | Publication Date |
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| CN103484095A CN103484095A (en) | 2014-01-01 |
| CN103484095B true CN103484095B (en) | 2015-07-22 |
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| CN201310472841.8A Expired - Fee Related CN103484095B (en) | 2013-10-11 | 2013-10-11 | Fracturing inclusion self-dissolving diversion agent and preparation method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104594869A (en) * | 2014-08-13 | 2015-05-06 | 中国石油天然气股份有限公司 | reservoir reconstruction method |
| CN105131917B (en) * | 2015-06-23 | 2018-02-06 | 中国石油集团渤海钻探工程有限公司 | A kind of degradable liquid plug |
| CN105672970B (en) * | 2015-12-31 | 2019-04-09 | 中国石油天然气股份有限公司 | Method for realizing temporary plugging, steering and multi-fracture fracturing in horizontal well section |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2433157C2 (en) * | 2005-01-21 | 2011-11-10 | Фэйрмаунт Минералз, Лтд. | Deflecting fluid |
| CN102093864B (en) * | 2010-12-21 | 2013-07-10 | 中国石油天然气股份有限公司 | Temporary plugging diverting agent for repeated fracturing of oil-water well and preparation method thereof |
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