Optimizing sampling frequency of surface and downhole measurements for efficient stick-slip vibration detection

作     者：Saket Srivastava Aditya Sharma Catalin Teodoriu Saket Srivastava;Aditya Sharma;Catalin Teodoriu

作者机构：Mewbourne School of Petroleum and Geological EngineeringThe University of OklahomaNormanOK73019USA 

出 版 物：《Petroleum》 (油气（英文）)

年 卷 期：2024年第10卷第1期

页      面：30-38页

核心收录：

学科分类：0820[工学-石油与天然气工程] 082001[工学-油气井工程] 08[工学] 

基　　金：Helmerich and Payne Inc University of Oklahoma, OU 

主　　题：Drilling closer downhole 

摘      要：Drilling vibrations significantly impact drilling operations with high costs due to early downhole equipment failure and loss of productive ***-slip vibrations,a severe form of torsional vibrations,is known to be present up to 50%of total drilling time,making it a topic of immense concern and *** ongoing discussion in the industry is regarding the reliability of surface measurements for early detection of severe downhole bit ***,most surface measurements are sampled at lower frequency rates closer to 1 ***,the implementation of advanced data acquisition modules in downhole subs has greatly improved our understanding of drilling vibrations through high resolution data,sampled up to 10 ***,with a wide range of sampling frequency to choose from different available tools,a critical question remains *** is an optimal and adequate sampling frequency for early detection of downhole vibrations using both surface and downhole measurements?The paper addresses the question with a focus on stick-slip vibrations through an experimental *** slip tests are repeated for different sampling frequencies of surface and downhole measurements and the stick slip index for each case is *** stick-slip index varies for different sampling frequency even though the vibration tests remain completely *** was inferred that sampling frequency of measurements greatly impact the detection of downhole *** though stick-slip vibrations are characteristically low frequency vibrations(
2Hz),a minimum of 10Hz sampling frequency is recommended for detection of stick-slip ***,all characteristics of stick-slip vibrations including bit sticking,bit RPM peaks and negative bit RPMs are clearly observed at a minimum of 100Hz sampling rate.