摘要
为了从地面控制随钻地层压力测量系统,研制了一套基于钻井液脉冲的下传指令接收装置。该装置通过测量管柱压力和钻铤转速,采用互相关算法提取压力脉冲信号的上升沿和下降沿位置,实现了对钻井液脉冲的指令接收和解码。数值试验表明,互相关算法是提取钻井液脉冲压力信号上升沿和下降沿的有效算法,通过将钻铤零转速作为接收下传指令的前置条件,软件自动调用解码算法,降低了误码风险。室内试验和现场试验结果表明,所研制的装置解码算法简单实用,具有高可靠性、低误码率的特点,能够满足随钻地层压力测量系统的实际需求。
In order to control the FPWD （Formation Pressure While Drilling） system from the surface, a downlink instruction receiver is developed based on the pressure pulse signal of drilling fluid. By measuring the pressure in the drill string and the RPM of drill string, the receiver decodes the downlink instructions with the cross-correlation algorithm which extracts the locations of rising and falling edges from pressure pulse signals. The numerical experiments verify that the cross-correlation algorithm is efficient in process-ing the pressure pulse signals of drilling fluid and risk in the decoding error is low, which sets the rotation speed of the drill string to zero as the precondition and automatically invokes the decoding program. The data from both lab and field tests have verified that the receiver could satisfy the FPWD system with simple design, high-reliability and low error rate.
出处
《中国海上油气》
CAS
CSCD
北大核心
2016年第6期88-94,共7页
China Offshore Oil and Gas
基金
中国石油化工集团公司科技部项目"地层压力随钻测量系统研制与应用(编号:P14116)"部分研究成果
关键词
随钻地层压力测量
指令下传
解码接收
互相关算法
formation pressure while drilling
downlink instruction
decoder and receiver
cross-correlation algorithm
作者简介
第一作者简介：宗艳波,男,高级工程师,2009年毕业于天津大学电气与自动化工程学院,获博士学位,主要从事随钻测量及井下仪器研发工作.地址：北京市朝阳区北辰东路8号北辰时代大厦701室（邮编：100101）.E-mail：zongyb.sripe@sinopec.com.
