摘要：Geometric analysis of hydraulic fractures in unconventional shale oil reservoirs is essential for enhancing production efficiency. This paper proposes a new method for evaluating large-scale fractures using cross-borehole electromagnetic measurement technique based on numerical simulation. The three-dimensional finite element method (3D FEM) is used to establish a hydraulic fracture model of horizontal wells, and the accuracy and validity of algorithm are verified using a benchmark model. The relationships between the geometric parameters of fractures and the obtained measurement signals are investigated. To evaluate the effectiveness of our proposed method in complex underground conditions, a case study is conducted. Numerical results indicate that the coaxial component signal (xx,yy,zz) is effective in characterizing hydraulic fractures. The signals exhibit greater sensitivity to the T-R spacing, fracture conductivity, fracture half-length, and fracture number, compared to transmitter frequency and fracture aspect ratio. Furthermore, the opening angle of asymmetrical fractures should be wider than 120 degrees to ensure proper fracturing. In the segmented fracturing monitoring case study, positioning the transmitter source inside the fracturing borehole greatly aids in determining the orientation of fractures, while deploying it in the monitoring borehole conveniently improves the collection of response signals with a more prominent amplitude. This study demonstrates that the cross-borehole measurement method is an effective technique for monitoring hydraulic fracturing in open boreholes and offers promising applications.

关键字：Hydraulic fractures; Finite element; Cross-borehole measurement; Geometric parameters

ISSN号：1895-6572

卷、期、页：网络发表

影响因子：0.000000

期刊分区（SCI为中科院分区）：四区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：ACTA GEOPHYSICA

通讯作者：吴世伟,黄文慧,张城煌

第一作者：刘得军

论文类型：期刊论文

论文概要：吴世伟,刘得军,黄文慧,张城煌，Characterization of electrically conductive hydrofractures with cross-borehole electromagnetic measurement，ACTA GEOPHYSICA，，网络发表

论文题目：Characterization of electrically conductive hydrofractures with cross-borehole electromagnetic measurement