摘要：Radial drilling-fracturing, combining radial drilling with hydraulic fracturing, is an innovative approach to develop unconventional reservoirs. Understanding the fracturing mechanism is essential for the successful design and operation of this technique. In this study, we conduct a series of fracturing experiments to investigate its unique fracture initiation and propagation characteristics. The cube made with cement mortar is used as the test specimen, in which the main well with radial laterals is pre-fabricated. Then, fracturing experiment on the specimen is performed in the tri-axial hydraulic fracturing test system. Two crucial factors are considered, including lateral number and lateral length. We also make a comparison between radial drilling-fracturing and conventional perforation fracturing. The fracture initiation pressure is recorded and the finial fracture geometry is analyzed. Results show that the fracture initiation pressure of radial drilling-fracturing is much lower than that of perforation fracturing; and with the lateral number increasing, fracture initiation pressure decreases monotonously. In addition, the radial laterals drilled from the main wellbore can guide the propagation of multi fractures, forming planar fractures, and the fracture reorientation controlled by in-situ stress is reduced. Therefore, the radial laterals drilled from the main wellbore can guide the propagation of fractures, and enlarge stimulated reservoir volume.
Copyright 2018, Unconventional Resources Technology Conference (URTeC).

发表日期：2018-01-01

期刊分区（SCI为中科院分区）：无

收录情况：EI（工程索引）

发表期刊名称：SPE/AAPG/SEG Unconventional Resources Technology Conference 2018, URTC 2018

参与作者：于伟,范鑫,Sepehrnoori, Kamy,耿黎东

通讯作者：刘庆岭,张祯祥,郭肇权

第一作者：田守嶒,李根生,盛茂

论文类型：会议论文

论文概要：刘庆岭,田守嶒,李根生,于伟,盛茂,范鑫,张祯祥,Sepehrnoori, Kamy,郭肇权,耿黎东，Fracture initiation and propagation characteristics for radial drilling-fracturing: An experimental study，SPE/AAPG/SEG Unconventional Resources Technology Conference 2018, URTC 2018，2018，

论文题目：Fracture initiation and propagation characteristics for radial drilling-fracturing: An experimental study