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Method for increasing correlation quality of controlled seismic source single shot by utilizing record of detector near to seismic source

A geophone and seismic source technology, which is applied in the field of vibroseis seismic acquisition, can solve the problems such as the inability to guarantee the record of a single shot.

Active Publication Date: 2016-02-03
中石化石油工程地球物理有限公司胜利分公司
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Problems solved by technology

Therefore, using the force signal to correlate the parent records collected in the field, the "guarantee" of the obtained single-shot records is still not guaranteed

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  • Method for increasing correlation quality of controlled seismic source single shot by utilizing record of detector near to seismic source
  • Method for increasing correlation quality of controlled seismic source single shot by utilizing record of detector near to seismic source
  • Method for increasing correlation quality of controlled seismic source single shot by utilizing record of detector near to seismic source

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Embodiment Construction

[0024] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below and described in detail in conjunction with the accompanying drawings.

[0025] Such as figure 1 as shown, figure 1 It is a flow chart of the method for improving the correlation quality of a vibroseis single shot by utilizing near-seismic source geophones to record according to the present invention.

[0026] In step 101, a geophone is embedded near the vibrator to record vibration signals. The method for recording the vibration signal of the ground surface requires a good coupling effect between the geophone and the ground surface, so as to record the vibration signal truly to the greatest extent. In one embodiment, a geophone is buried at a distance of 10 meters from the vibroseis. The geophone should be well coupled with the ground surface, and should be inserted tightly and buried firmly. figure 2 It is a sch...

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Abstract

The present invention provides a method for increasing correlation quality of a controlled seismic source single shot by utilizing the record of a detector near to a seismic source. The method includes the steps as follows: S1, embedding the detector near to the controlled seismic source so as to record seismic signals; S2, processing the seismic signals recorded by the detector so as to acquire a first-motion wave; S3, performing convolution operation for the first-motion wave and reference signals so as to calculate out ground seismic signals; S4, performing correlation operation for the ground seismic signals and mother record so as to acquire the single shot record. According to the invention, the signal to noise ratio of the single shot is high, seismic event is more continuous, the first-motion information is more clear, the seismic reflection information is more clear, and the imaging quality of subsurface structure is greatly increased.

Description

technical field [0001] The invention relates to the seismic acquisition technology of a vibrator, in particular to a method for improving the correlation quality of a single shot of a vibrator by utilizing the recorded information of a geophone near the vibrator. Background technique [0002] At present, vibroseis seismic exploration and acquisition technology is the development trend of land seismic exploration and acquisition technology. Compared with explosive vibrator, vibroseis has many advantages such as controllable frequency and energy, safety and environmental protection, low cost, and high construction efficiency, so it is more and more popular in various fields. Sought after by big oil geophysical oil companies. The process of using a vibrator to acquire a single shot for seismic exploration mainly adopts two methods. The first and most mature and commonly used method is to use theoretical signals to correlate the parent records collected by a vibrator to obtain a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/32
Inventor 宋智强刘斌段卫星魏继东陈吴金付大志兰文新
Owner 中石化石油工程地球物理有限公司胜利分公司
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