高温高压声场测试平台设计
发布时间：2018-08-03 21:05
【摘要】：高温高压三维物理模拟装置用于油藏地层条件下复杂驱动体系的渗流规律和宏观波及机理等试验研究。在驱替试验过程中实时监测岩芯内部各相流体的动态分布情况是试验的关键内容之一。本文旨在设计开发一套用于三维胶结物理模拟装置的声场测试平台,利用超声透射检测的方式来监测驱替试验过程中各相流体的动态分布。首先根据物理模型装置的工艺要求和测控需求,明确了声场测试平台的设计指标和主要功能,确定整体设计方案。然后采用美国国家仪器公司(National Instruments,NI)的虚拟仪器技术,选用PXI模块化硬件平台和Lab VIEW2012图形化软件开发平台实现系统的硬件和软件设计,实现整个试验过程和试验数据处理的自动化。声场测试平台的设计方案为采用一发一收方式(或一发多收方式)对岩芯进行超声波扫描,然后根据每个超声波接收探头检测到的超声波信号,计算超声波在物理模型中的传播速度以及衰减系数,最终反演成像得到物理模型内部的流体分布。设计方案中硬件设计主要包括超声发生单元、超声接收单元和中央控制单元的设计。软件设计采用模块化思想,分为初始化模块、参数设置模块、声场测试模块、历史数据查看模块等。通过硬件系统和软件系统的结合,实现了声场测试平台的多模块同步和高速数据采集、传输等功能。最后通过进行声场测试前期试验,确定声场测试平台装置的最佳激励信号的脉宽为换能器中心频率对应周期的1/2的方波脉冲信号,为后期的岩芯声场测试试验提供实验基础。
[Abstract]:The high temperature and high pressure 3D physical simulation device is used to study the percolation law and macroscopic sweep mechanism of complex driving system in reservoir formation. It is one of the key contents to monitor the dynamic distribution of fluid in core in real time during displacement test. The purpose of this paper is to design and develop a sound field test platform for 3D cementing physical simulation device, and to monitor the dynamic distribution of each phase fluid in displacement test by ultrasonic transmission detection. Firstly, according to the requirements of the physical model device, the design indexes and main functions of the acoustic field test platform are defined, and the overall design scheme is determined. Then, using the virtual instrument technology of National Instruments Corporation (National), the hardware and software design of the system is realized by using the PXI modular hardware platform and the Lab VIEW2012 graphical software development platform, which realizes the automation of the whole experiment process and the test data processing. The design scheme of the sound field test platform is to scan the core with ultrasonic wave in one send and one receiving mode (or more than one transmission), and then according to the ultrasonic signal detected by each ultrasonic receiving probe, The velocity and attenuation coefficient of ultrasonic wave propagation in the physical model are calculated, and the fluid distribution inside the physical model is obtained by inversion imaging. The hardware design includes ultrasonic generating unit, ultrasonic receiving unit and central control unit. The software design adopts the idea of modularization, which is divided into initialization module, parameter setting module, sound field testing module, historical data viewing module and so on. Through the combination of hardware system and software system, the multi-module synchronization and high-speed data acquisition and transmission functions of the acoustic field test platform are realized. Finally, through the pre-test of sound field test, it is determined that the pulse width of the optimum excitation signal of the acoustic field test platform is 1 / 2 square wave pulse signal of the corresponding period of the transducer central frequency, which provides the experimental basis for the later core sound field test.
【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】：2014
【分类号】：TE311;TB559
本文编号：2162992
[Abstract]:The high temperature and high pressure 3D physical simulation device is used to study the percolation law and macroscopic sweep mechanism of complex driving system in reservoir formation. It is one of the key contents to monitor the dynamic distribution of fluid in core in real time during displacement test. The purpose of this paper is to design and develop a sound field test platform for 3D cementing physical simulation device, and to monitor the dynamic distribution of each phase fluid in displacement test by ultrasonic transmission detection. Firstly, according to the requirements of the physical model device, the design indexes and main functions of the acoustic field test platform are defined, and the overall design scheme is determined. Then, using the virtual instrument technology of National Instruments Corporation (National), the hardware and software design of the system is realized by using the PXI modular hardware platform and the Lab VIEW2012 graphical software development platform, which realizes the automation of the whole experiment process and the test data processing. The design scheme of the sound field test platform is to scan the core with ultrasonic wave in one send and one receiving mode (or more than one transmission), and then according to the ultrasonic signal detected by each ultrasonic receiving probe, The velocity and attenuation coefficient of ultrasonic wave propagation in the physical model are calculated, and the fluid distribution inside the physical model is obtained by inversion imaging. The hardware design includes ultrasonic generating unit, ultrasonic receiving unit and central control unit. The software design adopts the idea of modularization, which is divided into initialization module, parameter setting module, sound field testing module, historical data viewing module and so on. Through the combination of hardware system and software system, the multi-module synchronization and high-speed data acquisition and transmission functions of the acoustic field test platform are realized. Finally, through the pre-test of sound field test, it is determined that the pulse width of the optimum excitation signal of the acoustic field test platform is 1 / 2 square wave pulse signal of the corresponding period of the transducer central frequency, which provides the experimental basis for the later core sound field test.
【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】：2014
【分类号】：TE311;TB559
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1 刘卓;高温高压声场测试平台设计[D];中国石油大学(华东);2014年
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