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.
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