A Multi-Factor Joint Identification Method for Drilling Rig Noise Suppression
A noise suppression and multi-factor technology, which is applied in the field of multi-factor joint identification of drilling rig noise suppression, can solve the problems of low processing efficiency and destruction of noise-free seismic channel data, and achieve high-efficiency acquisition, increase production efficiency, and save production costs. Effect
Active Publication Date: 2018-06-05
CHINA PETROLEUM & CHEM CORP +1
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[0003] The purpose of this invention is to solve the problem that the noise in the oil production area seriously affects the quality of seismic data. The conventional drilling rig suppression method requires manual interactive denoising processing, which not only has low processing efficiency, but also may destroy the noise-free seismic trace data. Drilling rig noise suppression method based on multi-factor joint identification and suppression of drilling rig noise
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[0029] The present invention will be further described below in combination with the accompanying drawings and specific embodiments.
[0030] combined with figure 1 , taking the model data as an example, the implementation method is as follows:
[0031] Step 1: Input the original single-shot seismic data in segy format, which has not undergone preprocessing such as spherical diffusion compensation and energy compensation.
[0032] The second step: use the multi-factor joint identification method to identify the noise of the drilling rig. The multi-factor joint identification method includes: the time axis direction energy ratio method, the offset direction energy ratio method, the amplitude spectrum fitting comparison method and the correlation method ratio.
[0033] (1) The energy ratio method in the time axis direction: According to the characteristic that the noise energy of the drilling rig is basically consistent from shallow to deep, the energy of effective information ...
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The invention discloses a drilling rig noise suppression method for multi-factor joint identification. According to the characteristics of the wave field and propagation rules of the drilling rig noise, the multi-factor joint identification method is used to automatically identify noisy seismic trace data. The multi-factor joint identification method Including the energy ratio method in the time axis direction, the energy ratio method in the offset direction, the amplitude spectrum fitting comparison method and the correlation method ratio method. Seismic data are divided into noisy seismic trace data and noise-free seismic trace data by multi-factor joint identification method, and noise-containing seismic trace data are denoised. The noise-containing seismic trace data after noise suppression is merged with the noise-free seismic trace data, and the noise-free seismic trace data are not destroyed while the drilling rig noise is suppressed. The invention can effectively suppress the noise of the drilling machine in the seismic data, greatly improve the signal-to-noise ratio of the seismic data, and contribute to improving the quality of the seismic data collected in the field and improving the technical level of seismic exploration in old oil areas.
Description
technical field [0001] The invention relates to the technical field of noise reduction processing of seismic data in oil and gas geophysical exploration, in particular to a drilling rig noise suppression method for multi-factor joint identification. Background technique [0002] With the economic development and the demand of the oil market, secondary high-precision exploration and deep seismic exploration in old oil areas have become the focus of oil and gas exploration. Years of oilfield development have increased the difficulty of seismic exploration in old oil areas. During the exploration process, the noise of the drilling rig appears continuously. The noise of the drilling rig in the field single-shot record is very serious, which seriously affects the signal-to-noise ratio of the seismic data. In order to improve the quality of seismic data, it is necessary to stop production of drilling rigs, which will cause great economic losses. At present, there are many researc...
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IPC IPC(8): G01V1/36
Inventor 刁瑞单联瑜尚新民李继光陈新荣赵翠霞王延光王兴谋王蓬
Owner CHINA PETROLEUM & CHEM CORP