Detection method of vibroseis vibrator heavy hammer interference vibration and equipment thereof

Abstract

The invention provides a detection method of vibroseis vibrator heavy hammer interference vibration and equipment thereof, wherein the method and the equipment are applied in the seismic exploration technology field. The method comprises the following steps of collecting accelerated speeds of at least three summits along a vertical direction and two orthogonal directions in a horizontal plane on a top surface or a bottom surface of the vibrator heavy hammer during a vibroseis excitation signal process; for each summit, executing the following processes: carrying out vector synthesis on the accelerated speeds of the vertical direction and the two orthogonal directions in the horizontal plane so as to acquire an acceleration synthesis vector of the summit at each sampling time, wherein the accelerated speeds are collected at each sampling time; connecting the acceleration synthesis vectors of the summit at all the sampling time so as to acquire an acceleration change track of the summit; based on a three-dimensional Lissajous figure change rule, according to the acceleration change track of the summit, determining an interference vibration condition of the summit; according to the interference vibration conditions of the at least three summits, determining the interference vibration condition of the vibrator heavy hammer. By using the method and the equipment of the invention, whether the vibrator heavy hammer satisfies a balance demand of a center of gravity, a center of mass and a center can be effectively detected; a reliable basis is provided for processing and assembling of the vibrator heavy hammer. The method and the equipment are conducive to increasing a frequency bandwidth and excitation precision of the vibroseis excitation signal.

Description

technical field [0001] The invention relates to the technical field of seismic exploration, in particular to a method and equipment for detecting interference vibration of a vibrator vibrator. Background technique [0002] With the development of the national economy relying on environmental resources, oil and gas exploration and other environmental resource exploration activities are developing from conventional exploration to high-density and high-precision direction. Vibroseis is an important excitation link in seismic exploration. The existing seismic The quality of signal excitation can no longer meet the needs of high-precision seismic exploration. Therefore, researchers continue to explore various methods to improve the output performance of excitation signals. [0003] In the process of exploration and development of oil and gas resources, the frequency bandwidth of seismic signals excited by vibroseis often marks the theoretical resolution of the signal itself for u...

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Problems solved by technology

[0004] In the work of studying how to expand the frequency bandwidth of the vibrator excitation signal, it is found that ideally, when the vibrator excites the signal, the vibrator weight should only vibrate in the vertical direction, and there is no vibration in the horizontal plane; but due to It is difficult for the vibrator weight to meet the balance requirements of the center of gravity, center of mass, and center during the processing and assembly process. It is affected by the eccentric force during its movement and will generate disturbing vibrations in the horizontal plane. A bottleneck affecting the accuracy of signal excitation

Therefore, in the research and development of high-precision vibrator, reducing the interference vibration of vibrator vibrator weight has become one of the key factors to improve the excitation performance of vibrator. detection and analysis methods

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