岩土力学2018，Vol.39Issue(1)：385-392,8.DOI:10.16285/j.rsm.2016.0038
页岩岩屑高精度波速测量的仪器与方法
Instruments and methods with high-precision for wave velocity measurement on shale debris
摘要
Abstract
Hydraulic fracturing is the key technology for shale gas development.Brittleness is one of the most important parameters to evaluate the fracability of shales.One of the most commonly used methods in laboratory is the measurement of wave velocity of pillar core to obtain Young's modulus and Poisson's ratio,so as to evaluate the rock brittleness coefficient.However,it is difficult to obtain regular shale core samples.Therefore,in this study,we develop a new device and a novel method with high precision to measure the velocity of shale debris based on pulse echo.Major factors that influence the measurement precision of shale debris wave velocity are analyzed.This study also proposes a new pin-type high frequency sound wave probe and a digital signal processing data analysis method.The measurement precision is improved by increasing sampling frequency and signal-to-noise ratio as well as using the autocorrelation method and pulse echo method.The comparison between results from regular core and debris confirms the reliability of the proposed procedure.关键词
压裂改造/页岩岩屑/波速/脆性Key words
fracturing/shale debris/wave velocity/brittleness分类
建筑与水利引用本文复制引用
索彧,葛洪魁,王小琼,孟范宝,刘峻嵘..页岩岩屑高精度波速测量的仪器与方法[J].岩土力学,2018,39(1):385-392,8.基金项目
国家自然科学基金(No.41304141) （No.41304141）
中国石油科技创新基金研究项目(No.2013D-5006-0213) （No.2013D-5006-0213）
中国石油大学(北京)科研启动基金(No.YJRC-2013-18)联合资助.This work was supported by the National Natural Science Foundation of China (41304141),the Joint Funds of the National Natural Science Foundation of China (2013D-5006-0213)and the Scientific Research Foundation for the Introduced Talent of China University of Petroleum (Beijing) (YJRC-2013-18). （北京）
