CN105649593B - A kind of method of multiple crack fracturing sealing flow conductivity in holding net horizontal section - Google Patents
A kind of method of multiple crack fracturing sealing flow conductivity in holding net horizontal section Download PDFInfo
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- CN105649593B CN105649593B CN201511015216.6A CN201511015216A CN105649593B CN 105649593 B CN105649593 B CN 105649593B CN 201511015216 A CN201511015216 A CN 201511015216A CN 105649593 B CN105649593 B CN 105649593B
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000007789 sealing Methods 0.000 title claims abstract description 29
- 239000002981 blocking agent Substances 0.000 claims abstract description 86
- 239000012224 working solution Substances 0.000 claims abstract description 42
- 239000012530 fluid Substances 0.000 claims abstract description 39
- 239000000835 fiber Substances 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 41
- 239000002245 particle Substances 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 239000000654 additive Substances 0.000 claims description 21
- 230000000996 additive effect Effects 0.000 claims description 21
- 239000004927 clay Substances 0.000 claims description 21
- 239000002562 thickening agent Substances 0.000 claims description 21
- 244000007835 Cyamopsis tetragonoloba Species 0.000 claims description 20
- -1 hydroxypropyl Chemical group 0.000 claims description 20
- 239000003381 stabilizer Substances 0.000 claims description 20
- 230000000855 fungicidal effect Effects 0.000 claims description 19
- 239000000417 fungicide Substances 0.000 claims description 19
- 239000004088 foaming agent Substances 0.000 claims description 18
- 101000766118 Haloarcula sp. (strain arg-2 / Andes heights) Cruxrhodopsin-2 Proteins 0.000 claims description 9
- IMBXRZKCLVBLBH-OGYJWPHRSA-N cvp protocol Chemical compound ClCCN(CCCl)P1(=O)NCCCO1.O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1.C([C@H](C[C@]1(C(=O)OC)C=2C(=C3C([C@]45[C@H]([C@@]([C@H](OC(C)=O)[C@]6(CC)C=CCN([C@H]56)CC4)(O)C(=O)OC)N3C=O)=CC=2)OC)C[C@@](C2)(O)CC)N2CCC2=C1NC1=CC=CC=C21 IMBXRZKCLVBLBH-OGYJWPHRSA-N 0.000 claims description 9
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 claims description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000003431 cross linking reagent Substances 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 5
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 claims description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 4
- 238000013019 agitation Methods 0.000 claims description 4
- 239000011324 bead Substances 0.000 claims description 4
- 229910052593 corundum Inorganic materials 0.000 claims description 4
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- 239000003094 microcapsule Substances 0.000 claims description 4
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 4
- 238000001802 infusion Methods 0.000 claims 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims 1
- 239000002068 microbial inoculum Substances 0.000 claims 1
- 230000001954 sterilising effect Effects 0.000 claims 1
- 238000004659 sterilization and disinfection Methods 0.000 claims 1
- 230000009466 transformation Effects 0.000 abstract description 14
- 230000009471 action Effects 0.000 abstract description 4
- 230000011218 segmentation Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 9
- 230000015556 catabolic process Effects 0.000 description 6
- 238000006731 degradation reaction Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000009096 changqing Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 3
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 3
- 235000011130 ammonium sulphate Nutrition 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- GFGSNLFVFHECJD-UHFFFAOYSA-N 1-hydroxy-1-propylguanidine Chemical compound CCCN(O)C(N)=N GFGSNLFVFHECJD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000002569 neuron Anatomy 0.000 description 1
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- 238000011105 stabilization Methods 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Sealing Material Composition (AREA)
Abstract
The present invention relates to a kind of methods for keeping multiple crack fracturing sealing flow conductivity in net horizontal section, prepare temporary stall first to working solution, temporary stall includes Degradable temporary blocking agent, biodegradable fiber, isodensity proppant and low viscous carrying liquid to working solution；Carry out staged fracturing, pump note order is the stall of prepad fluid → load fluid → temporarily to working solution；After the completion of whole pressure breaks, treat that temporary stall is degraded to working solution, drain, proppant stays in crack mouthful and forms seepage channel.This method improves closure efficiency, the wastage for reducing liquid between seam by using multiple dimensioned Degradable temporary blocking agent, after construction, temporary Degradable temporary blocking agent and biodegradable fiber of the stall into working solution is degradable under the action of bottom hole temperature (BHT), proppant then remains the flow conductivity of nearly pit shaft, available for conventional hydraulic pressure break segmentation transformation and the transformation of unconventional staged fracturing, the refracturing for not pressing off the transformation of perforation cluster and old well suitable for new well is transformed, suitable for the various techniques of horizontal well in segments transformation.
Description
Technical field
The present invention relates to low permeability gas reservoir horizontal well in segments to transform field, and in particular to more seams in a kind of holding net horizontal section
The method of pressure break sealing flow conductivity.
Background technology
Sulige gas field of reviving is typical DAMAGE OF TIGHT SAND GAS RESERVOIRS, and reservoir Lateral heterogeneity is strong, and longitudinal direction more phases are stacked, water
Horizontal well well track penetrates multiple sand bodies.Temporarily stifled multiple crack fracturing technique is a kind of technology for realizing the transformation of horizontal well multistage, is overcome
The anisotropism of reservoir improves seam item number to greatest extent.Temporarily stifled multiple crack fracturing technology be in the construction process, in time to
Suitable diverting agent is added in stratum, it then follows the principle flowed to resistance minimum direction, diverting agent are split with fracturing fluid into original
Seam or high permeability zone, assemble under differential pressure action and generate the filter cake bridge blinding of high intensity, prevent follow-up fracturing fluid from being split into this
Seam and high permeability zone, meanwhile, in certain level two under the conditions of stress difference, make pressure break generate new crack along with forefathers
Work crack different orientation crack initiation and extension, so as to establish new oil and gas flow passage and change oil-gas Layer fluid neuron network displacement rule
Rule, to improve the correctional effect of low permeability reservoir.
Crack is temporarily blocked up multiple crack fracturing technique and the shortcoming of diverting agent and is mainly had at present：
1st, the diverting agent of existing temporarily stifled turnaround fracture is added inside prepad fluid, and being that the remote well end of closure is cracky changes
It makes.
2nd, uniform particle sizes' plugging effect of existing diverting agent is bad.
3rd, existing diverting agent is directly added inside fracturing fluid, easily scattered by oil pipe into stratum transmission process, closure
Effect is bad.
4th, existing multistage fracturing technology is usually present some well sections and cannot effectively transform.
The content of the invention
The purpose of the present invention is overcoming problems of the prior art, multiple crack fracturing in a kind of holding net horizontal section is provided
The method of sealing flow conductivity, comprises the following steps：
1）Temporary stall is determined first to working solution, and temporary stall includes to working solution：It is degradable by volume percentage, 8.5%
Diverting agent, 8.5% proppant, 8.5%-17% biodegradable fibers and the low viscous carrying liquid of 66%-74.5%, according to different gas field reservoirs
Young's modulus determines the mechanical fraction of Degradable temporary blocking agent, when Young's modulus is when less than 25000MPa, all with big grain size
Degradable temporary blocking agent, when Young's modulus is in 25000-30000MPa, small particle Degradable temporary blocking agent accounts for 70%, and big grain size can drop
Solution diverting agent accounts for 30%, and when Young's modulus is more than 30000MPa, small particle Degradable temporary blocking agent accounts for 30%, big grain size Degradable temporary
Blocking agent accounts for 70%；
2）Carry out staged fracturing, pump note order is the stall of prepad fluid → load fluid → temporarily to working solution, prepad fluid, load fluid
Ratio be 1：1, temporary stall is 30-40 side/section to working solution, and big grain size Degradable temporary blocking agent, which is cut, gets lodged in crack port, small
Grain size Degradable temporary blocking agent is filled between big grain size Degradable temporary blocking agent；
3）After the completion of whole pressure breaks, treat that temporary stall is degraded to working solution, drain, proppant stays in crack mouthful formation seepage flow and leads to
Road.
Above-mentioned Degradable temporary blocking agent particle size range is 0.1-10mm, and small particle Degradable temporary blocking agent particle size range is 0.1-1
Mm, big grain size Degradable temporary blocking agent particle size range are 1-10 mm.
Above-mentioned a diameter of 10 μm, length 5-10mm of biodegradable fiber, molecular weight are 50,000-250 ten thousand, and the proppant is
The haydite of 20/40 mesh, 40/70 mesh or 70/140 mesh, the density of proppant are identical with Degradable temporary blocking agent.
The preparation method of above-mentioned Degradable temporary blocking agent is：At ambient temperature, by guanidine glue, alundum (Al2O3), magnesia, mistake
Ammonium sulfate microcapsule degelling agent, Sodium Polyacrylate bead, sodium acid carbonate are according to 48：107：193：11~42：24：1.26 quality
Ratio is uniformly mixed, and is then slowly added to mixture in water under agitation, the mass ratio of mixture and water for 26~
28：72~74, stirring can obtain the Degradable temporary blocking agent after five minutes.
Above-mentioned low viscous carrying liquid includes：By mass percentage, 0.30% hydroxypropyl guar thickening agent, 0.5% cleanup additive,
0.12% fungicide, 0.5% foaming agent, 0.5% clay stabilizer and 98.08% water.
Above-mentioned prepad fluid includes：By mass percentage, 0.30% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12%
Fungicide, 0.5% foaming agent, 0.5% clay stabilizer, 0.10% temperature stability agent and 97.98% water.
Above-mentioned load fluid includes：By mass percentage, 0.40% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12%
Fungicide, 0.5% foaming agent, 0.5% clay stabilizer, 0.10% temperature stability agent, 0.5% crosslinking agent and 97.38% water.
Above-mentioned hydroxypropyl guar thickening agent model CJ2-6, cleanup additive model TGF-1, fungicide model CJSJ-3,
Foaming agent model YFP-2, clay stabilizer model COP-2, and can be bought in Changqing oilfields Chemical Group Co., Ltd.
Above-mentioned hydroxypropyl guar thickening agent model CJ2-6, cleanup additive model TGF-1, fungicide model CJSJ-3,
Foaming agent model YFP-2, clay stabilizer model COP-2, temperature stability agent model TA-1, and can be in Changqing oilfields
Chemical Group Co., Ltd buys.
Above-mentioned hydroxypropyl guar thickening agent model CJ2-6, cleanup additive model TGF-1, fungicide model CJSJ-3,
Foaming agent model YFP-2, clay stabilizer model COP-2, temperature stability agent model TA-1, crosslinking agent model JL-
1, and can be bought in Changqing oilfields Chemical Group Co., Ltd.
The technical scheme is that a kind of method for keeping multiple crack fracturing sealing flow conductivity in net horizontal section is provided,
Beneficial effects of the present invention：
（1）The method of multiple crack fracturing sealing flow conductivity is according to Gruesbeck in this holding net horizontal section of the present invention
Crane span structure criterion, the volume fraction of Degradable temporary blocking agent and proppant helps quickly to be formed near wellbore zone temporarily not less than 17%
It is stifled.
（2）It is degradable used by the method for multiple crack fracturing sealing flow conductivity in this holding net horizontal section of the present invention
Diverting agent is by multiple dimensioned（Grain size 0.1-10mm）Temporarily stifled particle mixes according to a certain percentage, and 1-10 mm are big, and grain size is degradable
Diverting agent, which is cut, gets lodged in crack port, and 0.1-1 mm small particles are filled between big grain size Degradable temporary blocking agent, effectively quickly carry
High plugging effect, mixed proportion optimizes according to different gas field reservoir characteristics to be determined.
（3）The method of multiple crack fracturing sealing flow conductivity is degradable by adding in this holding net horizontal section of the present invention
Fiber plays the role of Degradable temporary blocking agent of the temporary stall into working solution and proppant auxiliary migration, improves temporary stall
To stability of the working solution from ground to shaft bottom, while the laying effect of proppant is also improved, further improve and temporarily block up successfully
Rate.
（4）Waterpower after the method pressure break of multiple crack fracturing sealing flow conductivity in this holding net horizontal section of the present invention
Crack sealing has Degradable temporary blocking agent, biodegradable fiber and proppant, and proppant remains the flow conductivity of nearly pit shaft, reduces
The risk of near wellbore zone obstruction remains the seepage channel of gas reservoir and pit shaft.Degradable temporary blocking agent and biodegradable fiber are in shaft bottom
Degradable under the action of temperature, no residue does not generate pollution to stratum.Degradation mechanism is body solution, the reaction of non-surface, during degradation
Between it is unrelated with particle size.
（5）The method of multiple crack fracturing sealing flow conductivity can be used for conventional hydraulic in this holding net horizontal section of the present invention
Pressure break segmentation transformation and the transformation of unconventional staged fracturing, the refracturing for not pressing off the transformation of perforation cluster and old well suitable for new well change
It makes, suitable for the various techniques of horizontal well in segments transformation.
The present invention is described in further details below with reference to attached drawing.
Specific embodiment
The present invention is described in further detail With reference to embodiment：
Embodiment 1：
In order to overcome problems of the prior art, the present embodiment provides multiple crack fracturing seams in a kind of holding net horizontal section
The method of mouth flow conductivity, comprises the following steps：
1）Temporary stall is determined first to working solution, and temporary stall includes to working solution：It is degradable by volume percentage, 8.5%
Diverting agent, 8.5% proppant, 8.5%-17% biodegradable fibers and the low viscous carrying liquid of 66%-74.5%, according to different gas field reservoirs
Young's modulus determines the mechanical fraction of Degradable temporary blocking agent, when Young's modulus is when less than 25000MPa, all with big grain size
Degradable temporary blocking agent, when Young's modulus is in 25000-30000MPa, small particle Degradable temporary blocking agent accounts for 70%, and big grain size can drop
Solution diverting agent accounts for 30%, and when Young's modulus is more than 30000MPa, small particle Degradable temporary blocking agent accounts for 30%, big grain size Degradable temporary
Blocking agent accounts for 70%；
2）Carry out staged fracturing, pump note order is the stall of prepad fluid → load fluid → temporarily to working solution, prepad fluid, load fluid
Ratio be 1：1, temporary stall is 30-40 side/section to working solution, and big grain size Degradable temporary blocking agent, which is cut, gets lodged in crack port, small
Grain size Degradable temporary blocking agent is filled between big grain size Degradable temporary blocking agent；
3）After the completion of whole pressure breaks, treat that temporary stall is degraded to working solution, drain, proppant stays in crack mouthful formation seepage flow and leads to
Road.
The method of multiple crack fracturing sealing flow conductivity in this holding net horizontal section of the present invention, using Multiscale combination
Degradable temporary blocking agent mixes according to a certain percentage, and big grain size Degradable temporary blocking agent, which is cut, gets lodged in crack port, smaller grain
Footpath is filled between big grain size Degradable temporary blocking agent, and effectively quick to improve plugging effect, mixed proportion is according to different gas field reservoirs
Characteristic optimization determines；According to the crane span structure criterion of Gruesbeck, the volume fraction of Degradable temporary blocking agent and proppant is not less than 17%,
Help quickly to be formed near wellbore zone temporarily stifled.
The addition of biodegradable fiber of the present invention plays Degradable temporary blocking agent of the temporary stall into working solution and proppant auxiliary
The effect of migration is helped, stability of the temporary stall to working solution from ground to shaft bottom is improved, while also improves the paving of proppant
Effect is put, further improves temporarily stifled success rate.After pressure break hydraulic fracture sealing have Degradable temporary blocking agent, biodegradable fiber and
Proppant, proppant remain the flow conductivity of nearly pit shaft, reduce the risk of near wellbore zone obstruction, remain gas reservoir and pit shaft
Seepage channel.Degradable temporary blocking agent and biodegradable fiber are degradable under the action of bottom hole temperature (BHT), no residue, not to stratum
Generate pollution.Degradation mechanism is body solution, non-surface reaction, and degradation time is unrelated with particle size.The present invention can be used for conventional water
It forces and splits segmentation transformation and the transformation of unconventional staged fracturing, do not press off the refracturing of the transformation of perforation cluster and old well suitable for new well
Transformation, suitable for the various techniques of horizontal well in segments transformation.
Embodiment 2：
On the basis of embodiment 1, multiple crack fracturing sealing water conservancy diversion energy in a kind of holding net horizontal section is present embodiments provided
The method of power, the Degradable temporary blocking agent particle size range are 0.1-10mm, and small particle Degradable temporary blocking agent particle size range is 0.1-1
Mm, big grain size Degradable temporary blocking agent particle size range are 1-10 mm.Degradable temporary blocking agent is by multiple dimensioned（Grain size 0.1-10mm）It is temporarily stifled
Particle mixes according to a certain percentage, and the big grain size Degradable temporary blocking agents of 1-10 mm, which are cut, gets lodged in crack port, and 0.1-1 mm are small
Grain size is filled between big grain size Degradable temporary blocking agent, and effectively quick to improve plugging effect, mixed proportion is stored up according to different gas fields
Layer characteristic optimization determines.
Further, a diameter of 10 μm of the biodegradable fiber, length 5-10mm, molecular weight is 50,000-250 ten thousand, described
Proppant is the haydite of 20/40 mesh, 40/70 mesh or 70/140 mesh, and the density of proppant is identical with Degradable temporary blocking agent.
Biodegradable fiber is added in, biodegradable fiber, which is distributed to carry in liquid, forms net structure, improves Degradable temporary and blocks up
Agent, from well head into the stability before stratum, improves closure success rate in liquid is carried；Proppant is Buddha's warrior attendant new material
The low-density ceramsite of limited company's production, the main haydite for selecting 20/40 mesh, 40/70 mesh or 70/140 mesh, realizes pressure break
After hydraulic fracture sealing have Degradable temporary blocking agent and a proppant, after the degradation of Degradable temporary blocking agent, proppant remains nearly well
The flow conductivity of cylinder reduces the risk of near wellbore zone obstruction, remains the seepage channel of gas reservoir and pit shaft.
Embodiment 3：
A kind of method for keeping multiple crack fracturing sealing flow conductivity in net horizontal section is present embodiments provided, including following step
Suddenly：
1）Temporary stall is determined first to working solution, and temporary stall includes to working solution：It is degradable by volume percentage, 8.5%
Diverting agent, 8.5% proppant, 8.5%-17% biodegradable fibers and the low viscous carrying liquid of 66%-74.5%, according to different gas field reservoirs
Young's modulus determines the mechanical fraction of Degradable temporary blocking agent, when Young's modulus is when less than 25000MPa, all with big grain size
Degradable temporary blocking agent, when Young's modulus is in 25000-30000MPa, small particle Degradable temporary blocking agent accounts for 70%, and big grain size can drop
Solution diverting agent accounts for 30%, and when Young's modulus is more than 30000MPa, small particle Degradable temporary blocking agent accounts for 30%, big grain size Degradable temporary
Blocking agent accounts for 70%；
2）Carry out staged fracturing, pump note order is the stall of prepad fluid → load fluid → temporarily to working solution, prepad fluid, load fluid
Ratio be 1：1, temporary stall is 30-40 side/section to working solution, and big grain size Degradable temporary blocking agent, which is cut, gets lodged in crack port, small
Grain size Degradable temporary blocking agent is filled between big grain size Degradable temporary blocking agent；
3）After the completion of whole pressure breaks, treat that temporary stall is degraded to working solution, drain, proppant stays in crack mouthful formation seepage flow and leads to
Road.
The preparation method of the Degradable temporary blocking agent is：At ambient temperature, by guanidine glue, alundum (Al2O3), magnesia, mistake
Ammonium sulfate microcapsule degelling agent, Sodium Polyacrylate bead, sodium acid carbonate are according to 48：107：193：11~42：24：1.26 quality
Ratio is uniformly mixed, and is then slowly added to mixture in water under agitation, the mass ratio of mixture and water for 26~
28：72~74, stirring can obtain the Degradable temporary blocking agent after five minutes.
The low viscous carrying liquid includes：By mass percentage, 0.30% hydroxypropyl guar thickening agent, 0.5% cleanup additive,
0.12% fungicide, 0.5% foaming agent, 0.5% clay stabilizer and 98.08% water.
The prepad fluid includes：By mass percentage, 0.30% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12%
Fungicide, 0.5% foaming agent, 0.5% clay stabilizer, 0.10% temperature stability agent and 97.98% water.
The load fluid includes：By mass percentage, 0.40% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12%
Fungicide, 0.5% foaming agent, 0.5% clay stabilizer, 0.10% temperature stability agent, 0.5% crosslinking agent and 97.38% water.
Embodiment 4：
A kind of method for keeping multiple crack fracturing sealing flow conductivity in net horizontal section is present embodiments provided, including following step
Suddenly：
1）Temporary stall is determined first to working solution, and temporary stall includes to working solution：It is degradable by volume percentage, 8.5%
Diverting agent, 8.5% proppant, 8.5%-17% biodegradable fibers and the low viscous carrying liquid of 66%-74.5%, according to different gas field reservoirs
Young's modulus determines the mechanical fraction of Degradable temporary blocking agent, when Young's modulus is when less than 25000MPa, all with big grain size
Degradable temporary blocking agent, when Young's modulus is in 25000-30000MPa, small particle Degradable temporary blocking agent accounts for 70%, and big grain size can drop
Solution diverting agent accounts for 30%, and when Young's modulus is more than 30000MPa, small particle Degradable temporary blocking agent accounts for 30%, big grain size Degradable temporary
Blocking agent accounts for 70%；
2）Carry out staged fracturing, pump note order is the stall of prepad fluid → load fluid → temporarily to working solution, prepad fluid, load fluid
Ratio be 1：1, temporary stall is 30-40 side/section to working solution, and big grain size Degradable temporary blocking agent, which is cut, gets lodged in crack port, small
Grain size Degradable temporary blocking agent is filled between big grain size Degradable temporary blocking agent；
3）After the completion of whole pressure breaks, treat that temporary stall is degraded to working solution, drain, proppant stays in crack mouthful formation seepage flow and leads to
Road.
The preparation method of the Degradable temporary blocking agent is：At ambient temperature, by guanidine glue, alundum (Al2O3), magnesia, mistake
Ammonium sulfate microcapsule degelling agent, Sodium Polyacrylate bead, sodium acid carbonate are according to 48：107：193：11~42：24：1.26 ratio
It is uniformly mixed, is then slowly added to mixture in water under agitation, the mass ratio of mixture and water is 26~28：72
~74, stirring can obtain the Degradable temporary blocking agent after five minutes.
The low viscous carrying liquid includes：By mass percentage, 0.30% hydroxypropyl guar thickening agent, 0.5% cleanup additive,
0.12% fungicide, 0.5% foaming agent, 0.5% clay stabilizer and 98.08% water, the hydroxypropyl guar thickening agent model
CJ2-6, cleanup additive model TGF-1, fungicide model CJSJ-3, foaming agent model YFP-2, clay stabilizer model
COP-2, and can be bought in Changqing oilfields Chemical Group Co., Ltd.
The prepad fluid includes：By mass percentage, 0.30% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12%
Fungicide, 0.5% foaming agent, 0.5% clay stabilizer, 0.10% temperature stability agent and 97.98% water, the hydroxypropyl guar thickening
Agent model CJ2-6, cleanup additive model TGF-1, fungicide model CJSJ-3, foaming agent model YFP-2, clay stabilization
Agent model COP-2, temperature stability agent model TA-1, and can be bought in Changqing oilfields Chemical Group Co., Ltd.
The load fluid includes：By mass percentage, 0.40% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12%
Fungicide, 0.5% foaming agent, 0.5% clay stabilizer, 0.10% temperature stability agent, 0.5% crosslinking agent and 97.38% water, the hydroxyl
Propyl guanidine glue thickening agent model CJ2-6, cleanup additive model TGF-1, fungicide model CJSJ-3, foaming agent model
YFP-2, clay stabilizer model COP-2, temperature stability agent model TA-1, crosslinking agent model JL-1, and can be in length
Celebrate the purchase of oilfield chemical Group Co., Ltd.
Embodiment 5：
A kind of method for keeping multiple crack fracturing sealing flow conductivity in net horizontal section is present embodiments provided, with Su Lige gas
Exemplified by Soviet Union and Eastern Europe of area of Tiandong County * * H horizontal wells, 7 sections are divided, 1,3,6 section adds in Degradable temporary stall to working solution, specific implementation process
It is as follows：
（1）Temporary stall is configured first to working solution, is constructed according to the geologic characteristics of Soviet Union's Sulige gas field East and offset well
Parameter determines the mechanical fraction of this well Degradable temporary blocking agent as 0.1m, 0.5m, 3mm, 7mm, ratio 2：1.5：3：0.7.Support
The density of agent is identical with Degradable temporary blocking agent.Volume and temporary stall after Degradable temporary blocking agent and mixed with proppants is total to working solution
The ratio of volume is 17%.The dosage of biodegradable fiber is the 65% of the sum of Degradable temporary blocking agent and proppant.Degradable temporary blocking agent
Density with proppant be it is identical, the two temporary stall into working solution according to 1：1 ratio mixes.Degradable temporary blocking agent, branch
Support agent and biodegradable fiber are dispersed in temporary stall to working solution the inside.The wherein temporary stall of paragraph 1 is to the dosage of working solution
For 32m3, the 3rd section of dosage is 29m3, the 6th section of dosage is 25m3。
（2）Pressure break paragraph 1, pump note order are the stall of prepad fluid → load fluid → temporarily to working solution.
（3）Remaining each section of pressure break, wherein the 3rd, 6 section, pump note order is the stall of prepad fluid → load fluid → temporarily to work
Liquid.
（4）After the completion of 7 sections of whole pressure breaks, closing well 8 is treated temporarily to block up working solution degradation when small, and drain, proppant stays in crack
Mouth forms seepage channel.
The foregoing examples are only illustrative of the present invention, does not form the limitation to protection scope of the present invention, all
Be with the present invention it is the same or similar design all belong to the scope of protection of the present invention within.
Claims (10)
- A kind of 1. method for keeping multiple crack fracturing sealing flow conductivity in net horizontal section, it is characterised in that：Comprise the following steps：1）Temporary stall is determined first to working solution, and temporary stall includes to working solution：By volume percentage, 8.5% Degradable temporary is blocked up Agent, 8.5% proppant, 8.5%-17% biodegradable fibers and the low viscous carrying liquid of 66%-74.5%, according to the Young of different gas field reservoirs Modulus determines the mechanical fraction of Degradable temporary blocking agent, when Young's modulus is when less than 25000MPa, can all be dropped with big grain size Diverting agent is solved, when Young's modulus is in 25000-30000MPa, small particle Degradable temporary blocking agent accounts for 70%, big grain size Degradable temporary Blocking agent accounts for 30%, and when Young's modulus is more than 30000MPa, small particle Degradable temporary blocking agent accounts for 30%, big grain size Degradable temporary blocking agent Account for 70%；2）Carry out staged fracturing, pump note order is the stall of prepad fluid → load fluid → temporarily to working solution, prepad fluid, the ratio of load fluid Example is 1：1, temporary stall is 30-40 side/section to working solution, and big grain size Degradable temporary blocking agent, which is cut, gets lodged in crack port, small particle Degradable temporary blocking agent is filled between big grain size Degradable temporary blocking agent；3）After the completion of whole pressure breaks, treat that temporary stall is degraded to working solution, drain, proppant stays in crack mouthful and forms seepage channel.
- 2. a kind of method for keeping multiple crack fracturing sealing flow conductivity in net horizontal section according to claim 1, feature It is:The Degradable temporary blocking agent particle size range is 0.1-10mm, and small particle Degradable temporary blocking agent particle size range is 0.1-1 mm, Big grain size Degradable temporary blocking agent particle size range is 1-10 mm.
- 3. a kind of method for keeping multiple crack fracturing sealing flow conductivity in net horizontal section according to claim 1, feature It is:A diameter of 10 μm, length 5-10mm of the biodegradable fiber, molecular weight are 50,000-250 ten thousand, and the proppant is 20/ The haydite of 40 mesh, 40/70 mesh or 70/140 mesh, the density of proppant are identical with Degradable temporary blocking agent.
- 4. a kind of method for keeping multiple crack fracturing sealing flow conductivity in net horizontal section according to claim 1, feature It is:The preparation method of the Degradable temporary blocking agent is：At ambient temperature, by guanidine glue, alundum (Al2O3), magnesia, over cure Sour ammonium microcapsule degelling agent, Sodium Polyacrylate bead, sodium acid carbonate are according to 48：107：193：11~42：24：1.26 mass ratio Example is uniformly mixed, and is then slowly added to mixture in water under agitation, and the mass ratio of mixture and water is 26~28： 72~74, stirring can obtain the Degradable temporary blocking agent after five minutes.
- 5. a kind of method for keeping multiple crack fracturing sealing flow conductivity in net horizontal section according to claim 1, feature It is:The low viscous carrying liquid includes：By mass percentage, 0.30% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12% Fungicide, 0.5% foaming agent, 0.5% clay stabilizer and 98.08% water.
- 6. a kind of method for keeping multiple crack fracturing sealing flow conductivity in net horizontal section according to claim 1, feature It is:The prepad fluid includes：By mass percentage, 0.30% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12% sterilization Agent, 0.5% foaming agent, 0.5% clay stabilizer, 0.10% temperature stability agent and 97.98% water.
- 7. a kind of method for keeping multiple crack fracturing sealing flow conductivity in net horizontal section according to claim 1, feature It is:The load fluid includes：By mass percentage, 0.40% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12% kill Microbial inoculum, 0.5% foaming agent, 0.5% clay stabilizer, 0.10% temperature stability agent, 0.5% crosslinking agent and 97.38% water.
- 8. a kind of method for keeping multiple crack fracturing sealing flow conductivity in net horizontal section according to claim 5, feature It is:The hydroxypropyl guar thickening agent model CJ2-6, cleanup additive model TGF-1, fungicide model CJSJ-3 rise Infusion model YFP-2, clay stabilizer model COP-2.
- 9. a kind of method for keeping multiple crack fracturing sealing flow conductivity in net horizontal section according to claim 6, feature It is:The hydroxypropyl guar thickening agent model CJ2-6, cleanup additive model TGF-1, fungicide model CJSJ-3 rise Infusion model YFP-2, clay stabilizer model COP-2, temperature stability agent model TA-1.
- 10. a kind of method for keeping multiple crack fracturing sealing flow conductivity in net horizontal section according to claim 7, feature It is:The hydroxypropyl guar thickening agent model CJ2-6, cleanup additive model TGF-1, fungicide model CJSJ-3 rise Infusion model YFP-2, clay stabilizer model COP-2, temperature stability agent model TA-1, crosslinking agent model JL-1.
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| CN106150429A (en) * | 2016-08-24 | 2016-11-23 | 江汉油田科瑞德石油工程技术（武汉）有限公司 | Shale gas is multistage splits pressure diverting agent, without bridging plug fracturing process and device |
| CN106526137A (en) * | 2016-11-17 | 2017-03-22 | 青岛科技大学 | Physical simulation experiment evaluation method for fracturing performance and flow conductivity of self-suspension propping agent |
| CN106917619B (en) * | 2017-03-21 | 2019-06-11 | 中国石油天然气股份有限公司 | The temporary stall of slit formation carbonate reservoir to fracture support integration remodeling method |
| CN107100607B (en) * | 2017-04-12 | 2018-08-17 | 大庆中联信实石油科技开发有限公司 | Temporary stall is to fracturing process |
| CN107558980B (en) * | 2017-07-18 | 2020-05-08 | 中国石油天然气股份有限公司 | Low-density temporary plugging crack length-extension-restraining fracturing method |
| CN109145497B (en) * | 2018-09-12 | 2019-05-14 | 中国石油大学(华东) | A kind of calculation method of hydraulic fracture near horizontal wellbore water blockoff plug agent amount |
| CN110259429A (en) * | 2019-06-06 | 2019-09-20 | 中国石油天然气股份有限公司 | A kind of temporary stifled volume acid fracturing method of multistage dynamic |
| CN112253073A (en) * | 2020-11-20 | 2021-01-22 | 重庆地质矿产研究院 | Stepped pulse circulation temporary plugging complex fracture network fracturing method for deep low-permeability reservoir |
| CN113684010B (en) * | 2021-08-31 | 2022-12-27 | 陕西延长石油（集团）有限责任公司 | Temporary fracture plugging diverter and application thereof in temporary plugging diverting sand fracturing process |
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