Abstract
With the prosperous development of electronic science and technology, electrical logging technology has been widely used in the process of oil exploitation. Seismoelectric logging is one of the many electrical logging methods, which has some unique advantages compared with other logging methods. At present, there are a lot of theoretical research on the seismoelectric logging at home and abroad, but due to some engineering problems has not been solved, practical instrument is not yet come into being. The acquisition of seismoelectric signal is one of the most difficult problems in the practical application. In this paper, a set of seismoelectric signal acquisition system based on SPI bus is designed to solve this problem. Experiment show that the system basically meets the demand of signal acquisition in seismoelectric logging
Highlights
There are many kinds of oil logging methods, such as electric logging, acoustic logging, radioactive logging and so on[1]
Seismoelectric logging is a kind of electrical logging, which based on the coupling mechanism of mechanical energy and electromagnetic energy, can directly detect the properties of formation, such as permeability, conductivity, porosity, and concentration of well liquid ion, with high resolution and excellent probing ability[2]
The reason is that there are still some key technical difficulties unsolved in engineering application, one of the major difficulties is the acquisition of underground seismoelectric signals
Summary
There are many kinds of oil logging methods, such as electric logging, acoustic logging, radioactive logging and so on[1]. All kinds of logging methods can directly or indirectly reflect the characteristics of some aspects of the underground rock stratum, but it is necessary to use a variety of logging methods in order to fully evaluate the underground rock stratum. Seismoelectric logging is a kind of electrical logging, which based on the coupling mechanism of mechanical energy and electromagnetic energy, can directly detect the properties of formation, such as permeability, conductivity, porosity, and concentration of well liquid ion, with high resolution and excellent probing ability[2]. The research on seismoelectric logging has been started since the 90s of last century, but logging instrument based on this method is still not available. The reason is that there are still some key technical difficulties unsolved in engineering application, one of the major difficulties is the acquisition of underground seismoelectric signals. In the process of seismoelectric logging, the logging system needs to coordinate the acquisition process of many measuring points underground.At the same time, a large number of data produced by each measurement point needs to be transmitted to the host computer in real time, which is the biggest difficulty for seismoelectric signal acquisition
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