Acoustic logging orientation receiving method and device based on phase control arc array

Abstract

The invention provides an acoustic logging orientation receiving method and device based on a phase control arc array. The method includes that each receiving transducer in the phase control arc array receives an acoustic signal; output waveform signals of receiving sub arrays are sequentially calculated according to the clockwise direction or the anticlockwise direction, wherein the output waveform signals of the receiving sub arrays are obtained by conducting phase control overlapping processing on the acoustic signals received by the receiving transducers in the receiving sub arrays; the amplitude of the output waveform signals of the receiving sub arrays is subjected to statistics to determine the entering orientation of the acoustic signals. The incident orientation of the acoustic signals is determined by using the output waveform signals of the receiving sub arrays. Due to the fact that acoustic beam main lobe angle width of the output waveform signals of the receiving sub arrays is smaller than that of the acoustic signals received by a traditional single-pole sub transducer or any single receiving transducer in the arc array, the method and device can improve underground acoustic measurement orientation resolution and signal to noise ratio fundamentally and can determine the incident orientation of acoustic wave.

Description

technical field [0001] The invention relates to the field of petroleum geophysical exploration, in particular to a method and device for receiving azimuths of acoustic logging based on a phased arc array. Background technique [0002] With the increasing difficulty of oil exploration and production, the research on the distribution of oil and gas reservoirs and the distribution of remaining oil in complex formations such as low porosity, low permeability, and heterogeneity has become a subject of continuous attention. New exploration methods and The demand for exploration technology is increasingly urgent. Acoustic logging instruments widely used in the petroleum industry play an important role in formation evaluation, and it is not difficult to see from the development of acoustic logging technology that the development of transducer technology is closely related to the progress of acoustic logging instruments. Transducer is one of the core components of logging tools, and...

AI Technical Summary

Problems solved by technology

From the perspective of receiving transducers, for example, Schlumberger's Sonic Scanner instrument uses 8 receiving transducers distributed at equal intervals along a circle, and its working method is that the 8 receiving transducers receive acoustic signals independently. Although the instrument has a certain circumferential resolution capability, its shortcoming is that it does not perform calculations on the signals received by each receiving transducer on the same circumference to improve the azimuth resolution and signal-to-noise ratio. fully exploit the potential of

Images