Oil well logging signal acquisition system Commentary
micro-resistivity scanning imaging technology originated in foreign countries, the world is a more advanced measurement technology, which break past the traditional measurement can only get circumferential borehole information and Inoue of this weakness , using an imaging technique using an array logging downhole sensor measurement or scanning of a large number of measured rotation information of the well formation, and analyzed to understand subtle changes in reservoir properties of the formation after the formation wall to obtain the information.
As oil exploration out of modern times, a lot of oil is mined, proven oil resources in order to become more and more difficult, the information to be collected is also growing, formation FMI logging technology in oil exploration and exploitation set to play a big role in the development of this technology has set great significance for oil exploration.
Collection electrical signal
Among the electric system through the deduction system is the technical implementation of the phase-sensitive bolt waves. In the measurement of the current art, if the extraction of the components administered within a certain period of the measurement signal in a normal state, and low noise signal is generally larger.
For our traditional methods, mostly for the use of the wave of exchange and give the corresponding compression for bandwidth, signal to noise ratio give a good improvement. Department wave having a normal state in terms of detection accuracy close correlation bandwidth if the bandwidth of the narrower detection capability stronger, whereas if the bandwidth is wider detection capability weaker. In terms of quality of signal extraction, usually extremely difficult.
Traditional wave phase sensitive detector circuit is more complicated, larger power consumption if the low pass filter integration time is relatively limited, and noise is extremely cumbersome state. If you want to reach a high quality signal extraction is usually extremely difficult.
The latest development of the phase-sensitive detection techniques, can solve all the problems of the conventional phase sensitive detection technique the complete separation of the useful signal may be unnecessary signal effective use of the reservoir and reservoir gas signal, having a high performance, high precision and excellent linearity characteristics. Further work on the detection of the digital phase detector Fan, mostly in the DSP's layer, does not need to pass through the reference signal generating circuit and low power consumption, it can be cost-effectively.
