Numerical simulation of multi-stage fracturing and optimization of perforation in a horizontal well
Aiming at analyzing the issues of non-uniform growths of multiple hydraulic fractures caused by stress shadowing, a numerical model considering elasto-hydrodynamic, stress interference and flow distribution into different fractures was presented. Based on the model, the effects of perforation fricti...
Ausführliche Beschreibung
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| Autor*in: |
ZHAO, Jinzhou [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2017transfer abstract |
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| Schlagwörter: |
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| Umfang: |
8 |
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| Übergeordnetes Werk: |
Enthalten in: 178 Final office evaluation findings in E-SISTER participants at one center: A glimpse into the long-term results of stress incontinence surgery - 2012, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:44 ; year:2017 ; number:1 ; pages:119-126 ; extent:8 |
| Links: |
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| DOI / URN: |
10.1016/S1876-3804(17)30015-0 |
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ELV030461553 |
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| 245 | 1 | 0 | |a Numerical simulation of multi-stage fracturing and optimization of perforation in a horizontal well |
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| 520 | |a Aiming at analyzing the issues of non-uniform growths of multiple hydraulic fractures caused by stress shadowing, a numerical model considering elasto-hydrodynamic, stress interference and flow distribution into different fractures was presented. Based on the model, the effects of perforation friction, perforation cluster spacing, Young modulus of rock and fracturing fluid viscosity on the growth of multiple fractures were investigated. The simulation results show that the growths of hydraulic fractures are relatively uniform with adequate perforation friction; the reduction of perforation cluster spacing, increase of Young modulus or fluid viscosity will cause the reduction of some fracture width and uneven flow distribution into these fractures, thus aggravating non-uniform growth of multiple fractures. Since appropriate perforation friction is conducive to the uniform growth of fractures, a convenient quantitative optimization method to calculate the needed perforation friction for uniform growth was proposed. By estimating inter-fracture induced stress during fracturing, the perforation friction coefficient needed to maintain uniform growth of fractures inside a stage is calculated, and reasonable engineering parameters of perforation can be selected based on this. The perforation parameters of a horizontal well were calculated with the proposed method, the simulation results and actual fracturing performance show that the optimized perforation parameters can effectively keep uniform growth of fractures. | ||
| 520 | |a Aiming at analyzing the issues of non-uniform growths of multiple hydraulic fractures caused by stress shadowing, a numerical model considering elasto-hydrodynamic, stress interference and flow distribution into different fractures was presented. Based on the model, the effects of perforation friction, perforation cluster spacing, Young modulus of rock and fracturing fluid viscosity on the growth of multiple fractures were investigated. The simulation results show that the growths of hydraulic fractures are relatively uniform with adequate perforation friction; the reduction of perforation cluster spacing, increase of Young modulus or fluid viscosity will cause the reduction of some fracture width and uneven flow distribution into these fractures, thus aggravating non-uniform growth of multiple fractures. Since appropriate perforation friction is conducive to the uniform growth of fractures, a convenient quantitative optimization method to calculate the needed perforation friction for uniform growth was proposed. By estimating inter-fracture induced stress during fracturing, the perforation friction coefficient needed to maintain uniform growth of fractures inside a stage is calculated, and reasonable engineering parameters of perforation can be selected based on this. The perforation parameters of a horizontal well were calculated with the proposed method, the simulation results and actual fracturing performance show that the optimized perforation parameters can effectively keep uniform growth of fractures. | ||
| 650 | 7 | |a horizontal well |2 Elsevier | |
| 650 | 7 | |a multi-stage fracturing |2 Elsevier | |
| 650 | 7 | |a perforation optimization |2 Elsevier | |
| 650 | 7 | |a fracture growth |2 Elsevier | |
| 650 | 7 | |a perforation friction |2 Elsevier | |
| 650 | 7 | |a numerical simulation |2 Elsevier | |
| 700 | 1 | |a CHEN, Xiyu |4 oth | |
| 700 | 1 | |a LI, Yongming |4 oth | |
| 700 | 1 | |a FU, Bin |4 oth | |
| 700 | 1 | |a XU, Wenjun |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier |t 178 Final office evaluation findings in E-SISTER participants at one center: A glimpse into the long-term results of stress incontinence surgery |d 2012 |g Amsterdam [u.a.] |w (DE-627)ELV016100263 |
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10.1016/S1876-3804(17)30015-0 doi GBVA2017010000017.pica (DE-627)ELV030461553 (ELSEVIER)S1876-3804(17)30015-0 DE-627 ger DE-627 rakwb eng 620 660 620 DE-600 660 DE-600 610 VZ 670 VZ 35.80 bkl ZHAO, Jinzhou verfasserin aut Numerical simulation of multi-stage fracturing and optimization of perforation in a horizontal well 2017transfer abstract 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Aiming at analyzing the issues of non-uniform growths of multiple hydraulic fractures caused by stress shadowing, a numerical model considering elasto-hydrodynamic, stress interference and flow distribution into different fractures was presented. Based on the model, the effects of perforation friction, perforation cluster spacing, Young modulus of rock and fracturing fluid viscosity on the growth of multiple fractures were investigated. The simulation results show that the growths of hydraulic fractures are relatively uniform with adequate perforation friction; the reduction of perforation cluster spacing, increase of Young modulus or fluid viscosity will cause the reduction of some fracture width and uneven flow distribution into these fractures, thus aggravating non-uniform growth of multiple fractures. Since appropriate perforation friction is conducive to the uniform growth of fractures, a convenient quantitative optimization method to calculate the needed perforation friction for uniform growth was proposed. By estimating inter-fracture induced stress during fracturing, the perforation friction coefficient needed to maintain uniform growth of fractures inside a stage is calculated, and reasonable engineering parameters of perforation can be selected based on this. The perforation parameters of a horizontal well were calculated with the proposed method, the simulation results and actual fracturing performance show that the optimized perforation parameters can effectively keep uniform growth of fractures. Aiming at analyzing the issues of non-uniform growths of multiple hydraulic fractures caused by stress shadowing, a numerical model considering elasto-hydrodynamic, stress interference and flow distribution into different fractures was presented. Based on the model, the effects of perforation friction, perforation cluster spacing, Young modulus of rock and fracturing fluid viscosity on the growth of multiple fractures were investigated. The simulation results show that the growths of hydraulic fractures are relatively uniform with adequate perforation friction; the reduction of perforation cluster spacing, increase of Young modulus or fluid viscosity will cause the reduction of some fracture width and uneven flow distribution into these fractures, thus aggravating non-uniform growth of multiple fractures. Since appropriate perforation friction is conducive to the uniform growth of fractures, a convenient quantitative optimization method to calculate the needed perforation friction for uniform growth was proposed. By estimating inter-fracture induced stress during fracturing, the perforation friction coefficient needed to maintain uniform growth of fractures inside a stage is calculated, and reasonable engineering parameters of perforation can be selected based on this. The perforation parameters of a horizontal well were calculated with the proposed method, the simulation results and actual fracturing performance show that the optimized perforation parameters can effectively keep uniform growth of fractures. horizontal well Elsevier multi-stage fracturing Elsevier perforation optimization Elsevier fracture growth Elsevier perforation friction Elsevier numerical simulation Elsevier CHEN, Xiyu oth LI, Yongming oth FU, Bin oth XU, Wenjun oth Enthalten in Elsevier 178 Final office evaluation findings in E-SISTER participants at one center: A glimpse into the long-term results of stress incontinence surgery 2012 Amsterdam [u.a.] (DE-627)ELV016100263 volume:44 year:2017 number:1 pages:119-126 extent:8 https://doi.org/10.1016/S1876-3804(17)30015-0 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 35.80 Makromolekulare Chemie VZ AR 44 2017 1 119-126 8 045F 620 |
| spelling |
10.1016/S1876-3804(17)30015-0 doi GBVA2017010000017.pica (DE-627)ELV030461553 (ELSEVIER)S1876-3804(17)30015-0 DE-627 ger DE-627 rakwb eng 620 660 620 DE-600 660 DE-600 610 VZ 670 VZ 35.80 bkl ZHAO, Jinzhou verfasserin aut Numerical simulation of multi-stage fracturing and optimization of perforation in a horizontal well 2017transfer abstract 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Aiming at analyzing the issues of non-uniform growths of multiple hydraulic fractures caused by stress shadowing, a numerical model considering elasto-hydrodynamic, stress interference and flow distribution into different fractures was presented. Based on the model, the effects of perforation friction, perforation cluster spacing, Young modulus of rock and fracturing fluid viscosity on the growth of multiple fractures were investigated. The simulation results show that the growths of hydraulic fractures are relatively uniform with adequate perforation friction; the reduction of perforation cluster spacing, increase of Young modulus or fluid viscosity will cause the reduction of some fracture width and uneven flow distribution into these fractures, thus aggravating non-uniform growth of multiple fractures. Since appropriate perforation friction is conducive to the uniform growth of fractures, a convenient quantitative optimization method to calculate the needed perforation friction for uniform growth was proposed. By estimating inter-fracture induced stress during fracturing, the perforation friction coefficient needed to maintain uniform growth of fractures inside a stage is calculated, and reasonable engineering parameters of perforation can be selected based on this. The perforation parameters of a horizontal well were calculated with the proposed method, the simulation results and actual fracturing performance show that the optimized perforation parameters can effectively keep uniform growth of fractures. Aiming at analyzing the issues of non-uniform growths of multiple hydraulic fractures caused by stress shadowing, a numerical model considering elasto-hydrodynamic, stress interference and flow distribution into different fractures was presented. Based on the model, the effects of perforation friction, perforation cluster spacing, Young modulus of rock and fracturing fluid viscosity on the growth of multiple fractures were investigated. The simulation results show that the growths of hydraulic fractures are relatively uniform with adequate perforation friction; the reduction of perforation cluster spacing, increase of Young modulus or fluid viscosity will cause the reduction of some fracture width and uneven flow distribution into these fractures, thus aggravating non-uniform growth of multiple fractures. Since appropriate perforation friction is conducive to the uniform growth of fractures, a convenient quantitative optimization method to calculate the needed perforation friction for uniform growth was proposed. By estimating inter-fracture induced stress during fracturing, the perforation friction coefficient needed to maintain uniform growth of fractures inside a stage is calculated, and reasonable engineering parameters of perforation can be selected based on this. The perforation parameters of a horizontal well were calculated with the proposed method, the simulation results and actual fracturing performance show that the optimized perforation parameters can effectively keep uniform growth of fractures. horizontal well Elsevier multi-stage fracturing Elsevier perforation optimization Elsevier fracture growth Elsevier perforation friction Elsevier numerical simulation Elsevier CHEN, Xiyu oth LI, Yongming oth FU, Bin oth XU, Wenjun oth Enthalten in Elsevier 178 Final office evaluation findings in E-SISTER participants at one center: A glimpse into the long-term results of stress incontinence surgery 2012 Amsterdam [u.a.] (DE-627)ELV016100263 volume:44 year:2017 number:1 pages:119-126 extent:8 https://doi.org/10.1016/S1876-3804(17)30015-0 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 35.80 Makromolekulare Chemie VZ AR 44 2017 1 119-126 8 045F 620 |
| allfields_unstemmed |
10.1016/S1876-3804(17)30015-0 doi GBVA2017010000017.pica (DE-627)ELV030461553 (ELSEVIER)S1876-3804(17)30015-0 DE-627 ger DE-627 rakwb eng 620 660 620 DE-600 660 DE-600 610 VZ 670 VZ 35.80 bkl ZHAO, Jinzhou verfasserin aut Numerical simulation of multi-stage fracturing and optimization of perforation in a horizontal well 2017transfer abstract 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Aiming at analyzing the issues of non-uniform growths of multiple hydraulic fractures caused by stress shadowing, a numerical model considering elasto-hydrodynamic, stress interference and flow distribution into different fractures was presented. Based on the model, the effects of perforation friction, perforation cluster spacing, Young modulus of rock and fracturing fluid viscosity on the growth of multiple fractures were investigated. The simulation results show that the growths of hydraulic fractures are relatively uniform with adequate perforation friction; the reduction of perforation cluster spacing, increase of Young modulus or fluid viscosity will cause the reduction of some fracture width and uneven flow distribution into these fractures, thus aggravating non-uniform growth of multiple fractures. Since appropriate perforation friction is conducive to the uniform growth of fractures, a convenient quantitative optimization method to calculate the needed perforation friction for uniform growth was proposed. By estimating inter-fracture induced stress during fracturing, the perforation friction coefficient needed to maintain uniform growth of fractures inside a stage is calculated, and reasonable engineering parameters of perforation can be selected based on this. The perforation parameters of a horizontal well were calculated with the proposed method, the simulation results and actual fracturing performance show that the optimized perforation parameters can effectively keep uniform growth of fractures. Aiming at analyzing the issues of non-uniform growths of multiple hydraulic fractures caused by stress shadowing, a numerical model considering elasto-hydrodynamic, stress interference and flow distribution into different fractures was presented. Based on the model, the effects of perforation friction, perforation cluster spacing, Young modulus of rock and fracturing fluid viscosity on the growth of multiple fractures were investigated. The simulation results show that the growths of hydraulic fractures are relatively uniform with adequate perforation friction; the reduction of perforation cluster spacing, increase of Young modulus or fluid viscosity will cause the reduction of some fracture width and uneven flow distribution into these fractures, thus aggravating non-uniform growth of multiple fractures. Since appropriate perforation friction is conducive to the uniform growth of fractures, a convenient quantitative optimization method to calculate the needed perforation friction for uniform growth was proposed. By estimating inter-fracture induced stress during fracturing, the perforation friction coefficient needed to maintain uniform growth of fractures inside a stage is calculated, and reasonable engineering parameters of perforation can be selected based on this. The perforation parameters of a horizontal well were calculated with the proposed method, the simulation results and actual fracturing performance show that the optimized perforation parameters can effectively keep uniform growth of fractures. horizontal well Elsevier multi-stage fracturing Elsevier perforation optimization Elsevier fracture growth Elsevier perforation friction Elsevier numerical simulation Elsevier CHEN, Xiyu oth LI, Yongming oth FU, Bin oth XU, Wenjun oth Enthalten in Elsevier 178 Final office evaluation findings in E-SISTER participants at one center: A glimpse into the long-term results of stress incontinence surgery 2012 Amsterdam [u.a.] (DE-627)ELV016100263 volume:44 year:2017 number:1 pages:119-126 extent:8 https://doi.org/10.1016/S1876-3804(17)30015-0 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 35.80 Makromolekulare Chemie VZ AR 44 2017 1 119-126 8 045F 620 |
| allfieldsGer |
10.1016/S1876-3804(17)30015-0 doi GBVA2017010000017.pica (DE-627)ELV030461553 (ELSEVIER)S1876-3804(17)30015-0 DE-627 ger DE-627 rakwb eng 620 660 620 DE-600 660 DE-600 610 VZ 670 VZ 35.80 bkl ZHAO, Jinzhou verfasserin aut Numerical simulation of multi-stage fracturing and optimization of perforation in a horizontal well 2017transfer abstract 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Aiming at analyzing the issues of non-uniform growths of multiple hydraulic fractures caused by stress shadowing, a numerical model considering elasto-hydrodynamic, stress interference and flow distribution into different fractures was presented. Based on the model, the effects of perforation friction, perforation cluster spacing, Young modulus of rock and fracturing fluid viscosity on the growth of multiple fractures were investigated. The simulation results show that the growths of hydraulic fractures are relatively uniform with adequate perforation friction; the reduction of perforation cluster spacing, increase of Young modulus or fluid viscosity will cause the reduction of some fracture width and uneven flow distribution into these fractures, thus aggravating non-uniform growth of multiple fractures. Since appropriate perforation friction is conducive to the uniform growth of fractures, a convenient quantitative optimization method to calculate the needed perforation friction for uniform growth was proposed. By estimating inter-fracture induced stress during fracturing, the perforation friction coefficient needed to maintain uniform growth of fractures inside a stage is calculated, and reasonable engineering parameters of perforation can be selected based on this. The perforation parameters of a horizontal well were calculated with the proposed method, the simulation results and actual fracturing performance show that the optimized perforation parameters can effectively keep uniform growth of fractures. Aiming at analyzing the issues of non-uniform growths of multiple hydraulic fractures caused by stress shadowing, a numerical model considering elasto-hydrodynamic, stress interference and flow distribution into different fractures was presented. Based on the model, the effects of perforation friction, perforation cluster spacing, Young modulus of rock and fracturing fluid viscosity on the growth of multiple fractures were investigated. The simulation results show that the growths of hydraulic fractures are relatively uniform with adequate perforation friction; the reduction of perforation cluster spacing, increase of Young modulus or fluid viscosity will cause the reduction of some fracture width and uneven flow distribution into these fractures, thus aggravating non-uniform growth of multiple fractures. Since appropriate perforation friction is conducive to the uniform growth of fractures, a convenient quantitative optimization method to calculate the needed perforation friction for uniform growth was proposed. By estimating inter-fracture induced stress during fracturing, the perforation friction coefficient needed to maintain uniform growth of fractures inside a stage is calculated, and reasonable engineering parameters of perforation can be selected based on this. The perforation parameters of a horizontal well were calculated with the proposed method, the simulation results and actual fracturing performance show that the optimized perforation parameters can effectively keep uniform growth of fractures. horizontal well Elsevier multi-stage fracturing Elsevier perforation optimization Elsevier fracture growth Elsevier perforation friction Elsevier numerical simulation Elsevier CHEN, Xiyu oth LI, Yongming oth FU, Bin oth XU, Wenjun oth Enthalten in Elsevier 178 Final office evaluation findings in E-SISTER participants at one center: A glimpse into the long-term results of stress incontinence surgery 2012 Amsterdam [u.a.] (DE-627)ELV016100263 volume:44 year:2017 number:1 pages:119-126 extent:8 https://doi.org/10.1016/S1876-3804(17)30015-0 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 35.80 Makromolekulare Chemie VZ AR 44 2017 1 119-126 8 045F 620 |
| allfieldsSound |
10.1016/S1876-3804(17)30015-0 doi GBVA2017010000017.pica (DE-627)ELV030461553 (ELSEVIER)S1876-3804(17)30015-0 DE-627 ger DE-627 rakwb eng 620 660 620 DE-600 660 DE-600 610 VZ 670 VZ 35.80 bkl ZHAO, Jinzhou verfasserin aut Numerical simulation of multi-stage fracturing and optimization of perforation in a horizontal well 2017transfer abstract 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Aiming at analyzing the issues of non-uniform growths of multiple hydraulic fractures caused by stress shadowing, a numerical model considering elasto-hydrodynamic, stress interference and flow distribution into different fractures was presented. Based on the model, the effects of perforation friction, perforation cluster spacing, Young modulus of rock and fracturing fluid viscosity on the growth of multiple fractures were investigated. The simulation results show that the growths of hydraulic fractures are relatively uniform with adequate perforation friction; the reduction of perforation cluster spacing, increase of Young modulus or fluid viscosity will cause the reduction of some fracture width and uneven flow distribution into these fractures, thus aggravating non-uniform growth of multiple fractures. Since appropriate perforation friction is conducive to the uniform growth of fractures, a convenient quantitative optimization method to calculate the needed perforation friction for uniform growth was proposed. By estimating inter-fracture induced stress during fracturing, the perforation friction coefficient needed to maintain uniform growth of fractures inside a stage is calculated, and reasonable engineering parameters of perforation can be selected based on this. The perforation parameters of a horizontal well were calculated with the proposed method, the simulation results and actual fracturing performance show that the optimized perforation parameters can effectively keep uniform growth of fractures. Aiming at analyzing the issues of non-uniform growths of multiple hydraulic fractures caused by stress shadowing, a numerical model considering elasto-hydrodynamic, stress interference and flow distribution into different fractures was presented. Based on the model, the effects of perforation friction, perforation cluster spacing, Young modulus of rock and fracturing fluid viscosity on the growth of multiple fractures were investigated. The simulation results show that the growths of hydraulic fractures are relatively uniform with adequate perforation friction; the reduction of perforation cluster spacing, increase of Young modulus or fluid viscosity will cause the reduction of some fracture width and uneven flow distribution into these fractures, thus aggravating non-uniform growth of multiple fractures. Since appropriate perforation friction is conducive to the uniform growth of fractures, a convenient quantitative optimization method to calculate the needed perforation friction for uniform growth was proposed. By estimating inter-fracture induced stress during fracturing, the perforation friction coefficient needed to maintain uniform growth of fractures inside a stage is calculated, and reasonable engineering parameters of perforation can be selected based on this. The perforation parameters of a horizontal well were calculated with the proposed method, the simulation results and actual fracturing performance show that the optimized perforation parameters can effectively keep uniform growth of fractures. horizontal well Elsevier multi-stage fracturing Elsevier perforation optimization Elsevier fracture growth Elsevier perforation friction Elsevier numerical simulation Elsevier CHEN, Xiyu oth LI, Yongming oth FU, Bin oth XU, Wenjun oth Enthalten in Elsevier 178 Final office evaluation findings in E-SISTER participants at one center: A glimpse into the long-term results of stress incontinence surgery 2012 Amsterdam [u.a.] (DE-627)ELV016100263 volume:44 year:2017 number:1 pages:119-126 extent:8 https://doi.org/10.1016/S1876-3804(17)30015-0 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 35.80 Makromolekulare Chemie VZ AR 44 2017 1 119-126 8 045F 620 |
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Enthalten in 178 Final office evaluation findings in E-SISTER participants at one center: A glimpse into the long-term results of stress incontinence surgery Amsterdam [u.a.] volume:44 year:2017 number:1 pages:119-126 extent:8 |
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Enthalten in 178 Final office evaluation findings in E-SISTER participants at one center: A glimpse into the long-term results of stress incontinence surgery Amsterdam [u.a.] volume:44 year:2017 number:1 pages:119-126 extent:8 |
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numerical simulation of multi-stage fracturing and optimization of perforation in a horizontal well |
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Numerical simulation of multi-stage fracturing and optimization of perforation in a horizontal well |
| abstract |
Aiming at analyzing the issues of non-uniform growths of multiple hydraulic fractures caused by stress shadowing, a numerical model considering elasto-hydrodynamic, stress interference and flow distribution into different fractures was presented. Based on the model, the effects of perforation friction, perforation cluster spacing, Young modulus of rock and fracturing fluid viscosity on the growth of multiple fractures were investigated. The simulation results show that the growths of hydraulic fractures are relatively uniform with adequate perforation friction; the reduction of perforation cluster spacing, increase of Young modulus or fluid viscosity will cause the reduction of some fracture width and uneven flow distribution into these fractures, thus aggravating non-uniform growth of multiple fractures. Since appropriate perforation friction is conducive to the uniform growth of fractures, a convenient quantitative optimization method to calculate the needed perforation friction for uniform growth was proposed. By estimating inter-fracture induced stress during fracturing, the perforation friction coefficient needed to maintain uniform growth of fractures inside a stage is calculated, and reasonable engineering parameters of perforation can be selected based on this. The perforation parameters of a horizontal well were calculated with the proposed method, the simulation results and actual fracturing performance show that the optimized perforation parameters can effectively keep uniform growth of fractures. |
| abstractGer |
Aiming at analyzing the issues of non-uniform growths of multiple hydraulic fractures caused by stress shadowing, a numerical model considering elasto-hydrodynamic, stress interference and flow distribution into different fractures was presented. Based on the model, the effects of perforation friction, perforation cluster spacing, Young modulus of rock and fracturing fluid viscosity on the growth of multiple fractures were investigated. The simulation results show that the growths of hydraulic fractures are relatively uniform with adequate perforation friction; the reduction of perforation cluster spacing, increase of Young modulus or fluid viscosity will cause the reduction of some fracture width and uneven flow distribution into these fractures, thus aggravating non-uniform growth of multiple fractures. Since appropriate perforation friction is conducive to the uniform growth of fractures, a convenient quantitative optimization method to calculate the needed perforation friction for uniform growth was proposed. By estimating inter-fracture induced stress during fracturing, the perforation friction coefficient needed to maintain uniform growth of fractures inside a stage is calculated, and reasonable engineering parameters of perforation can be selected based on this. The perforation parameters of a horizontal well were calculated with the proposed method, the simulation results and actual fracturing performance show that the optimized perforation parameters can effectively keep uniform growth of fractures. |
| abstract_unstemmed |
Aiming at analyzing the issues of non-uniform growths of multiple hydraulic fractures caused by stress shadowing, a numerical model considering elasto-hydrodynamic, stress interference and flow distribution into different fractures was presented. Based on the model, the effects of perforation friction, perforation cluster spacing, Young modulus of rock and fracturing fluid viscosity on the growth of multiple fractures were investigated. The simulation results show that the growths of hydraulic fractures are relatively uniform with adequate perforation friction; the reduction of perforation cluster spacing, increase of Young modulus or fluid viscosity will cause the reduction of some fracture width and uneven flow distribution into these fractures, thus aggravating non-uniform growth of multiple fractures. Since appropriate perforation friction is conducive to the uniform growth of fractures, a convenient quantitative optimization method to calculate the needed perforation friction for uniform growth was proposed. By estimating inter-fracture induced stress during fracturing, the perforation friction coefficient needed to maintain uniform growth of fractures inside a stage is calculated, and reasonable engineering parameters of perforation can be selected based on this. The perforation parameters of a horizontal well were calculated with the proposed method, the simulation results and actual fracturing performance show that the optimized perforation parameters can effectively keep uniform growth of fractures. |
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