Uniquely determine fracture dimension and formation permeability from diagnostic fracture injection test
作者机构:Chongqing UniversityChina State Key Laboratory of Coal Mine Disaster Dynamics and ControlChina Petroleum and Geosystem Engineering DepartmentThe University of Texas at AustinUnited States
出 版 物:《Rock Mechanics Bulletin》 (岩石力学通报(英文))
年 卷 期:2023年第2卷第2期
页 面:53-62页
学科分类:08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程(可授工学、理学学位)]
主 题:DFIT Hydraulic fracture Permeability Fracture dimension Fracture closure Leak-off coefficient
摘 要:Estimating formation permeability is crucial for production estimation,hydraulic fracturing design optimization and rate transient *** experiments can be used to measure the permeability of rock samples,but the results may not be representative at a field scale because of reservoir heterogeneity and pre-existing natural fracture *** Fracture Injection Tests(DFIT)have now become standard practice to estimate formation pore pressure and formation ***,in low permeability reservoirs,after-closure radial flow is often absent,which can cast significant uncertainties in interpreting DFIT *** knowing the fracture dimension prior,open fracture stiffness/compliance can t be determined,which is required for formation permeability *** work has to assume a fracture radius or fracture height in order to estimate formation permeability,thus dent the confidence in the interpretation *** the study,we present a new approach to determine fracture dimension,leak-off coefficient and formation permeability uniquely based on material balance and basic fracture mechanics,using data from shut-in to after-closure linear *** examples are also presented to demonstrate the simplicity and effectiveness of this new approach.