DOI: 10.1016/j.jcou.2018.06.012
Scopus记录号: 2-s2.0-85049077299
论文题名: Mechanism of supercritical carbon dioxide (SC-CO2) hydro-jet fracturing
作者: Cai C. ; Kang Y. ; Wang X. ; Hu Y. ; Chen H. ; Yuan X. ; Cai Y.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 26 起始页码: 575
结束页码: 587
语种: 英语
英文关键词: Fracture initiation
; Hydro-jet fracturing
; Perforation
; Supercritical carbon dioxide
Scopus关键词: Analysis of variance (ANOVA)
; Carbon dioxide
; Cracks
; Design of experiments
; Fracture
; Geological surveys
; Global warming
; Nozzle design
; Nozzles
; Petroleum prospecting
; Shale
; Supercritical fluid extraction
; Well perforation
; Carbon dioxide emissions
; Crack extension direction
; Experimental specimens
; Fracture initiation
; Hydrojets
; Ordos basin , China
; Orthogonal experimental design
; Supercritical carbon dioxides
; Fighter aircraft
英文摘要: Supercritical Carbon Dioxide (SC-CO2) hydro-jet fracturing can increase gas production and reduce carbon dioxide emission, and is considered as a promising alternative for shale gas exploration. SC-CO2 hydro-jet fracturing technology has resulted in multi-fracture network in the YanChang Well of Ordos Basin, China. However, the mechanism of SC-CO2 hydro-jet fracturing is still not clear. To address the problem, experiments and specimens were designed based on Orthogonal Experimental Design (OED) to investigate the influential factors, including jet pressure (Pin), jet distance (S), nozzle diameter (dn), perforation length (L) and perforation diameter (dperf). In addition, the evaluation indexes, ambient pressure and the fracture profile were deeply discussed. The investigation results indicated that crack initiation on the root of perforation was prevented by the higher SC-CO2 jet pressure. Particularly, when the nozzle diameter was more than the inlet diameter of casing (3mm), the crack number on perforation dropped sharply. When the optimal perforation length and perforation diameter were respectively 50mm and 6mm, the peak values of the crack number and distribution range were observed. The results of Analysis of Variance (ANOVA) demonstrated that jet pressure and perforation length were the main influential parameters. With the increase in ambient pressure, the threshold pressure of fracture initiation increased. Three patterns of crack extension directions were found in the experimental specimens: surface fracture, longitudinal fracture, and transverse fracture. © 2018 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111861
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, Wuhan University, Wuhan, 430072, China; Hubei Key Laboratory of Waterjet Theory and New Technology, Wuhan University, Wuhan, 430072, China; School of Power and Mechanical Engineering, Wuhan University, Wuhan, 430072, China; Mechanical and Electrical Engineering Department, Leshan Vocational and Technical College, LeShan, 614000, China
Recommended Citation:
Cai C.,Kang Y.,Wang X.,et al. Mechanism of supercritical carbon dioxide (SC-CO2) hydro-jet fracturing[J]. Journal of CO2 Utilization,2018-01-01,26