| At present,most of the major oil fields in China are in the middle and late stages of development,and the output of many previously high-yielding oil and gas layers continues to decline,and the water production rate continues to rise.Therefore,in the development of oil fields,the subdivision of thin oil and gas layers and It is becoming more and more important to find thin oil and gas layers missed by previous exploration.High-resolution acoustic slowness logging has a good effect on the detection of small layers,but high-resolution acoustic slowness logging tools are still in the development stage in China.In order to realize high-resolution acoustic travel time difference detection,high-resolution Experimental device for the slowness of sound waves.In order to achieve high resolution,it is necessary to reduce the spacing of the receiving probes,which need to transmit high-frequency acoustic signals.According to the basic characteristics of high-resolution acoustic slowness logging,it can be judged that the high-resolution acoustic slowness logging experiment system mainly includes:the excitation source that can excite the ultrasonic transducer,and the waveform data received by the receiving source.The acquisition system for collection,the main control system that receives and stores the data collected by the acquisition system,and the interface part that connects with the entire experimental system and communicates with the host computer.According to its characteristics,the excitation source that can excite the ultrasonic transducer and the interface circuit that connects with the whole experimental system and communicates with the host computer are developed in this paper.The hardware part is composed of STM32-based debugging interface circuit and FPGA-based excitation control circuit;the software part is composed of embedded software design and host computer interface design.The debugging interface circuit uses STM32 as the core processor to realize communication with the host computer and data transmission with the main control circuit;the excitation control circuit uses FPGA as the control chip to excite the ultrasonic transducer.Through the actual excitation experiment,the high-resolution acoustic wave slowness experiment system can realize the excitation of the ultrasonic transducer.The experimental system has high stability,which provides a strong guarantee for the subsequent development of high-resolution acoustic slowness logging tools. |
