A Laboratory Study of the Hydraulic Fracturing by Fracture Mechanics

• Main Authors: Cheng-Yi Lin, 林政億
• Other Authors: Chein-Lee Wang
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/74994602495551940690

碩士 === 國立成功大學 === 資源工程學系碩博士班 === 94 === Hydraulic fracturing is one of the popular methods for measuring in-situ stresses. Based on the relationship between fracturing pressures and in-situ stresses, hydraulic fracturing has proved to be an effective method to measure in-situ stresses. This study attempts to set up a laboratory experiment of hydraulic fracturing based on the theory proposed by Rummel (1987). A numerical package, ANSYS, was also used and the parametric study was carried out in this study. The results of the experiment show that the average values of fracture toughness are greater than those from three point bending test. This find that increase of fracture length tends to lower the fracturing pressure. The numerical analysis reveals the re-fracturing pressure are not effected by the fracture length when the fracture length is greater than the radius of borehole.