数字信号处理器在随钻声波测井仪中的应用  

Application of Digital Signal Processor to Acoustic LWD Tool

作　　者：卢俊强[1,2] 鞠晓东 乔文孝[1,2] 肖红兵 王瑞甲[1,2] 吴文河 

机构地区：[1]中国石油大学油气资源与探测国家重点实验室,北京102249 [2]北京市地球探测与信息技术重点实验室,北京102249 [3]中国石化胜利油田钻井工艺研究院,山东东营257017

出　　处：《测井技术》2013年第5期527-530,共4页Well Logging Technology

基　　金：国家自然科学基金项目(61102102;11134011;11204380);国家科技重大专项(2011ZX05020-009);中国石油天然气集团公司项目(2008A-2702;2011A-3903);中国石油大学(北京)基本科研基金(KYJJ2012-05-07)资助

摘　　要：随钻声波测井仪器由于受到系统传输速率的限制,无法传输大批量的数据和控制命令,井下仪器基本无法由地面程序或者人工进行实时干预。介绍了以数字信号处理器(DSP)为核心的随钻声波测井仪器设计方法。它可以实现井下仪器的声波发射、接收通道控制、数据采集、存储等控制时序,并由DSP对采集到的多通道波形数据进行处理得到时差。采集到的大批量波形数据和实时处理结果由DSP存储到FLASH存储器中。初步测试结果表明,以DSP为核心的井下控制器能够较好地满足随钻声波测井仪器在控制和数据处理等方面的要求。Due to the limitations of the system transmission rate, acoustic Logging While Drilling （LWD） tool is unable to transmit large quantities of data and control commands, and the downhole tool can not be controlled by ground processes or artificial commands. Because of these limitations, the digital signal processor （DSP） is used as the core of the acoustic LWD logging tool, which realized acoustic transmitter, receiving channel control, data acquisition, storage, etc. Furthermore, multi-channel waveform data is processed by the DSP to acquire acoustic slowness. Waveform data and results of the real-time processing are stored in FLASH memory by the DSP. The preliminary test results show that the downhole controller in which DSP was used as the core processor can meet the requirements of control and data processing in acoustic LWD tool.

关 键 词：随钻声波测井仪 数字信号处理器 控制 数据存储 时差计算 

分 类 号：P631.84[天文地球—地质矿产勘探]