摘要
随着石油钻井工程各项技术的飞速发展,MWD、LWD及旋转导向等系统井下测量数据越来越多。为了实现井下测量数据快速有效传输,需优化编码调制方式分析泥浆脉冲信号的解码效率和数据传输速率。通过对比几种常用的编解码方式,可以了解脉冲位置编解码方式的原理、框架结构和编译计算过程。针对此种编码方式,提出了脉冲数K和时间帧数M之间的组合码关系,映射了对应关系的数学模型;并利用数据分析了快型和慢型两种组合方式的差异性,推导了编码效率计算方法;进一步计算分析快型和慢型两种方式的传输速率的差别,最后,通过软件对解码方式进行了实现。
With the rapid development of oil drilling engineering technologies,the downhole measurement data of MWD,LWD,and rotary steering systems are increasing.In order to achieve a fast and effective transmission of downhole measurement data,it is necessary to optimize the encoding and modulation method to analyze the decoding efficiency and data transmission rate of mud pulse signals.This article compares several commonly used encoding and decoding methods,and focuses on introducing the principle,frame structure,and calculation process of the pulse position encoding method.A combination code relationship between pulse number K and time frame number M is proposed for this encoding method,and a mathematical model of the corresponding relationship is mapped.The differences between the combination methods of the fast and slow modes are analyzed using data,and the calculation method for encoding efficiency is derived.Further calculation and analysis are conducted on the difference in transmission rates between fast and slow modes.Finally,the decoding method is implemented through software.
作者
车卫勤
杜晶
郭子枫
赵小勇
傅余
李宝鹏
CHE Weiqin;DU Jing;GUO Zifeng;ZHAO Xiaoyong;FU Yu;LI Baopeng(Directional Well Technical Service Company of Bohai Drilling Engineering Co.,Ltd.,CNPC;No.4 Drilling Engineering Company of Bohai Drilling Engineering Co.,Ltd.,CNPC)
出处
《油气田地面工程》
2024年第2期78-84,共7页
Oil-Gas Field Surface Engineering
基金
渤海钻探工程有限公司科技项目“随钻数据高速传输系统研制”(2013ZD01K)
渤海钻探工程有限公司科技项目“基于调相方式的编解码方法研究”(2017Z30Y)联合资助。
关键词
脉冲信号
脉冲位置调制
组合码
映射模型
编码效率
pulse signal
pulse position modulation
combination code
mapping model
coding rate
