基于双处理器架构的地层压力测控系统设计.pdf

2014年第33卷第7期
传感器与微系统( Transducer and Microsystem Technologies
基于双处理器架构的地层压力测控系统设计
赖欣,胡泽',汪春浦2
(1.西南石油大学电气信息学院,四川成都610500;
2.川庆地质勘探开发研究院,四川成都610051)
摘要:针对地层压力随针测測量困难、耗时等问题,以及工具下入困难、工具遇卡等潜在风险,提出了一种
基于双处理器的随钻地层压力测量控制系统。在随钻过程中通过压力传感器测量井下压カ,由主处理器
12对地层压力值进行采集与处理;从处理器 ATTMIEGA8对电磁阀进行智能控制,实现分流器
换向器与执行机构的协调配合,从而获得实时地层压力数据。实验结果表明:该系统实现了在井下高温
高压和强干扰的恶劣环境下对压力信号进行采集、分析、传输和存储,系统设计合理并具有较好的抗干扰
性与实用性。
关键词:地层压力;随钻测量;传感器;测控系统
中图分类号:TP216
文献标识码:A
文章编号:1000-9787(2014)07-0067-03
Design of formation pressure measurement and control
system based on dual-processor architecture
LAI Xin', HU Ze", WANG Chun-pu
1. School of Electrical Information, Southwest Petroleum University, Chengdu 610500, China;
2. Chuanqing Geological Exploration & Development Research Institute, Chengdu 610051, China
Abstract: Aiming at problems that formation pressure measurement while drilling is difficult and time
consuming, meanwhile, the descending and sticking of downhole tool are potential risks, in allusion to problem
above, the formation pressure measurement and control system is proposed based on dual-processor. By pressure
transducer, down well pressure can be measured in the process of measurement while driling(MWD), and the
formation pressure value is collected and processed by the master processor TMS320F2812, the electromagnetic
valve is intelligently controlled by the slave processor, and the shunt, commutator and the actuator are coordinated
well, so that the real-time formation pressure data is obtained. The experimental result shows that the system can
collect, analyze, transmit and store pressure signal in severe well environment of high temperature, high pressure
and strong interference, and the system is designed reasonably and has adyantages of strong anti-interference
capability and applicability
Key words: formation pressure; measurement while drilling; sensor; measurement and control systen
的数据可以优化泥浆密度和当量循环密度,防止井涌、井
地层压力是油藏描述的一个重要参数,多年来人们
喷、地层损害或地层压裂以及循环漏失。随钻地层压力数
直寻求在钻井过程中测量地层压力。20世纪50年代钻杆据还可以帮助校正预测性孔隙压力算法。随钻地层压力测
测试(DSr)和电缆测试技术相继出现,钻杆测试和电缆测试系统能在钴进过程中实时快速的提供地层压力数据,使
试都需要长时间停钻才能进行测量,无法实现随钻测量。钻井过程得到优化、提高了钴进效率和避免了一些潜在的
而且在大斜度或者水平井中使用传统的钻杆传输电缆测井危險。近几年,国外公司分别开发了自己的随钴地层
工具进行地层压力测试极其耗时,存在工具下入困难等潜压力测试工具,可提供实时地层压力数据,且能满足各种地
在风险,现代随钻测井工具正在取代传统的电缆测井工具。层的需要。国内这方面的研究还处于探素阶段,尚无自主
为了提高井场作业的安全性,利用随钻压力测试工具提供研发的成熟产品“。本文在结合国内对地层压力测试系
收稿日期:2013-12-01
基金项目:国家重大专项资助项目(20087X05026-001-09);四川省教育厅资助项目(142Z80052)