Field test method for selection of seismic exploration trace-to-trace distance and maximum shot-to-geophone distance
A seismic exploration and field test technology, applied in seismic signal processing and other directions, can solve problems such as high risk, difficulty in selecting track spacing and maximum offset, and achieve the effects of shortening construction period, increasing economic benefits, and improving exploration efficiency.
Inactive Publication Date: 2006-07-19
赵军国
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[0002] At present, in the seismic exploration process of oilfields, trace spacing and maximum offset are two very important parameters, and their selection depends on theoretical calculations, and their accuracy depends on the amount of data collected and the reliability of the data. For the exploration of new areas or data blank areas, the existing demonstration methods do not have practical methods to prove it. Therefore, the selection of trace spacing and maximum offset distance is more difficult and risky, and its disadvantages are obvious
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[0023] combined with figure 1 and 2 , the present invention is further described:
[0024] Its technical scheme includes the following steps:
[0025] (1) In the field, use GPS to stake out at equidistance (XR), which is called the receiving point. The total length of stakeout should be greater than 2-3 times the buried depth of the deepest target layer in the area;
[0026] (2) At one end of the stakeout line, between two receiving points, stake out the excitation point at an equidistance (Δx), where XR is an integral multiple of Δx (generally 5-10 times);
[0027] (3) Embedding a detector at the receiving point. At the excitation point, if explosives are used as the artificial seismic source, the depth of the excitation well should be kept, and the excitation charge should be exactly the same; if the vibroseis is used as the artificial seismic source, the parameters used at each excitation point should be kept exactly the same;
[0028] (4) Use the digital seismograph t...
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The invention relates to a field test method of seismic exploration spacing, max offset traces selection. It comprises the following steps: 1) arranging the receiving points by equal distance; 2) doing exciting points' set-work by equal distance on one end of the set-work line between the two receiving points; 3) arranging the demodulator on the receiving point and positioning the artificial earthquake origin on the exciting points; 4) using the digital vibration measurer to do artificial excites and receives the generated earthquake wave data and recording it in the storage medium; 5) arranging the indoor earthquake data by offset order; 6) generating a series of new channel integer by using ªñx, 2ªñx and nªñx as channel distance; 7) Comparative analyzing the new generated channel integer to ascertain the channel distance and the max offset traces.
Description
1. Technical field: [0001] The invention relates to a method for seismic exploration of petroleum, in particular to a field test method for selection of seismic exploration track spacing and maximum offset distance. 2. Background technology: [0002] At present, in the seismic exploration process of oilfields, trace spacing and maximum offset are two very important parameters, and their selection depends on theoretical calculations, and their accuracy depends on the amount of data collected and the reliability of the data. For the exploration of new areas or areas with blank data, the existing demonstration methods do not have practical methods to prove it. Therefore, the selection of trace spacing and maximum offset distance is more difficult and risky, and its disadvantages are obvious. 3. Contents of the invention: [0003] The object of the present invention is to address the above-mentioned defects in the prior art, and to provide a field test method for seismic surve...
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IPC IPC(8): G01V1/28
Inventor 赵军国王增明
Owner 赵军国