气测录井定量脱气系统设计与开发

发布时间：2018-10-29 20:37

【摘要】：油气勘探过程中,气测录井技术是在钻井现场,对随钻井液所携带的地层烃类和非烃类气体含量进行及时、准确的在线检测分析,进而发现和评价油气层的关键技术。气测录井系统包括井场脱气、气路输送以及色谱分析三个主要部分。常规的气测录井技术由于受到钻井液温度和环境压强的限制,一般只能分离并传输烃类流体中的1 5C C组分,而最能反映储层性质、油层信息的重烃类组分6 8C C包括苯、甲苯等的含量,受工艺技术的限制无法进行在线分析,这对油气层的现场评价以及地层层位的判断产生较大影响。本文在对国内外气测录井脱气系统进行充分调研的基础上,结合录井现场的环境情况以及重烃类组分脱出、传输的必要条件,提出了一种新型随钻井液定量脱气系统设计方案。在钻井液引流、加热、搅拌的基础上,实现了分离室恒温恒压控制,提高了随钻井液的气体脱出比例和油气层解释评价效率。开发了基于C8051F121单片机的控制系统,实现了脱气系统相关参数的高精度采集以及对脱气电机、加热器的有效控制。基于MATLAB仿真研究了改进的PID控制器和常规PID控制器对系统控制效果的对比,在Keil C51开发环境下编写编译了传感器模拟量的采集程序和基于PID控制算法的比例调节阀控制程序。设计开发了基于VS2010的控制中心管理软件,通过串口与下位机进行通信,并通过TCP/IP与录井服务器进行网络通信,实现了对脱气器运行情况和模拟量参数的实时监控和有效管理。在完成硬件平台的搭建和软件的设计以及整体联合调试后,在钻井现场进行常规脱气器和定量脱气器的脱气效率对比实验,证实了设计的可行性,实现了对随钻井液的在线脱气,提高了脱气效率,达到了预期的设计目的。
[Abstract]:In the process of oil and gas exploration, gas logging technology is the key technology for the timely and accurate on-line detection and analysis of hydrocarbon and non-hydrocarbon gas content carried by drilling fluid on the drilling site, and then to find and evaluate oil and gas layers. Gas logging system includes three main parts: field degassing, gas path transportation and chromatographic analysis. Because of the limitation of drilling fluid temperature and environmental pressure, conventional gas logging technology can only separate and transfer 15C C component of hydrocarbon fluid, and it can best reflect reservoir property. Heavy hydrocarbon component 68C of reservoir information includes benzene. The content of toluene can not be analyzed on line due to the limitation of technology, which has a great influence on the field evaluation of oil and gas reservoir and the judgement of stratigraphic position. On the basis of full investigation of gas logging degassing system at home and abroad, a new design scheme of quantitative degassing system with drilling fluid is put forward in this paper, based on the environmental conditions of mud logging site and the necessary conditions for heavy hydrocarbon components to be removed and transmitted. On the basis of drainage, heating and stirring of drilling fluid, the constant temperature and pressure control of separation chamber is realized, and the ratio of gas removal with drilling fluid and the efficiency of interpretation and evaluation of oil and gas layer are improved. The control system based on C8051F121 single chip microcomputer is developed. The high precision collection of the relevant parameters of the degassing system and the effective control of the degassing motor and heater are realized. The control effect of the improved PID controller and the conventional PID controller is studied based on MATLAB simulation. The acquisition program of sensor analog quantity and the proportional control program based on PID control algorithm are compiled under the Keil C51 development environment. The control center management software based on VS2010 is designed and developed, which communicates with lower computer through serial port and network communication with mud logging server through TCP/IP. The real-time monitoring and effective management of the operation and analog parameters of the degassing device are realized. After completing the hardware platform and software design as well as the whole joint debugging, a comparative experiment of degassing efficiency between conventional degassing device and quantitative degassing device is carried out on the drilling site, which proves the feasibility of the design. The on-line degassing of drilling fluid is realized, the degassing efficiency is improved, and the expected design purpose is achieved.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE928

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