摘要：Accurate monitoring of hydraulic fracturing fracture morphology is of great significance to the follow-up exploration and development work. Electromagnetic monitoring of fractures can effectively identify the effective propped volume (EPV) of fracturing fractures, making up for the disadvantages of other monitoring methods. This letter introduces a modeling method and a physical model based on very-low-frequency (VLF) electromagnetic scattering theory for monitoring the development of asymmetric fracturing fractures. The 3-D finite-element method (FEM) of equivalent fracturing fracture on transition boundary condition (TBC) surface is used to realize the fast forward modeling of 3-D space receiving response in large formations. A sector-shaped receiver is designed and the relationship between electromagnetic receiving signals and orientation parameters of asymmetric fracturing fractures, such as direction of fracture development and tilt angle, is discussed. By analyzing 3-D signals obtained from the rotating receiver sector, the spatial state of multiple asymmetric fracturing fractures can be determined. The problem of how to identify the 3-D direction of crack growth with electromagnetic monitoring method is solved, which provides a theoretical reference for the development and inversion of detection instruments.

关键字：Hydraulic systems; Monitoring; Electromagnetics; Surface cracks; Electromagnetic scattering; Surface impedance; Boundary conditions; electromagnetic modeling; finite-element analysis; geophysical measurement techniques; numerical simulation; oil drilling; well logging

ISSN号：1545-598X

卷、期、页：卷: 18期: 2页: 246-250

发表日期：2021-02-01

影响因子：3.833000

期刊分区（SCI为中科院分区）：二区

收录情况：SCIE（科学引文索引网络版）,地学领域高质量科技期刊分级目录（国外T1）,EI（工程索引）

发表期刊名称：IEEE Geoscience and Remote Sensing Letters

通讯作者：李洋,翟颖,史文哲,咸沂轩

第一作者：刘得军

论文类型：期刊论文

论文概要：李洋,刘得军,翟颖,史文哲,咸沂轩，3-D FEM Azimuth Forward Modeling of Hydraulic Fractures Based on Electromagnetic Theory，IEEE Geoscience and Remote Sensing Letters，2021，卷: 18期: 2页: 246-250

论文题目：3-D FEM Azimuth Forward Modeling of Hydraulic Fractures Based on Electromagnetic Theory