Research On A High Speed And Single Channel Oil-well Pressure Measurement System

Perforation and fracturing technology are the key steps in the oil exploitation. Theyhave an important impact on opening the formation of oil and gas, and improving theproductivity. In order to obtain the annulus pressure of the oil-well at the moment ofperforation and fracturing, the paper design a high speed and single channel oil-wellpressure measurement system using the programming and self-adaptive sampling strategies.The system is based on the theory of storage measurement.In order to obtain the real and effective pressure signal, we first put forward thetechnology requirements of the measurement system according to the feature of the signal.Briefly and clearly, we introduce how the designed circuit meets the technologyrequirements. And we simulate the measurement system to verify the rationality of thesoftware in the CPLD according to the sequential scheduling chart in the paper. Then onbasis of analyzing cushioning mechanism of materials, we research the modification ofsealing materials for improving energy absorption rate of materials, and we get someresults at last. Aiming at the abominable environment, we select suitable sealing material,and get better sealing results using layered phases and flexible transition of sealingtechnology . At last we analysis the dynamic characteristic of the pressure sensor and thedata obtained from the oil-well at Daqing oil field. It is useful in the study of perforationtechnology and points out the deficiencies of the measurement system.Furthermore, the paper puts forward the design method of the oil-well measurementsystem using a single DSP chip. The measurement system uses one highly- integrationDSP chip—TMS320F2808, which can improve the credibility and efficiency of thecircuitry and implement the function of the circuitry using the programming method. We can use it to prepare for upgrading the technology of the oil-well measurement system.