CN1804662A - Field test method for selection of seismic exploration trace-to-trace distance and maximum shot-to-geophone distance - Google Patents
Field test method for selection of seismic exploration trace-to-trace distance and maximum shot-to-geophone distance Download PDFInfo
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- CN1804662A CN1804662A CN 200610042045 CN200610042045A CN1804662A CN 1804662 A CN1804662 A CN 1804662A CN 200610042045 CN200610042045 CN 200610042045 CN 200610042045 A CN200610042045 A CN 200610042045A CN 1804662 A CN1804662 A CN 1804662A
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- track pitch
- test method
- maximum offset
- field test
- seismic prospecting
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Abstract
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 delta x, 2 delta x and n delta x as channel distance; 7) Comparative analyzing the new generated channel integer to ascertain the channel distance and the max offset traces.
Description
One, technical field:
The present invention relates to a kind of method of seismic prospecting oil, particularly a kind of seismic prospecting track pitch, maximum offset are selected the field test method.
Two, background technology:
At present, in the seismic prospecting process in oil field, track pitch and maximum offset are two very important parameters, and Theoretical Calculation is depended in their selection, and its precision all depends on the reliability of what and data of data collection, in exploration newly developed area or data clear area, the hands-on approach that existing demonstration method is unactual proves, and is therefore, more difficult to the selection of track pitch and maximum offset, risk is bigger, and its drawback is conspicuous.
Three, summary of the invention:
Purpose of the present invention is exactly the above-mentioned defective that exists at prior art, and the seismic prospecting track pitch, the maximum offset that provide a kind of selection that solves track pitch and maximum offset to depend on this defective of Theoretical Calculation are selected the field test method.
Its technical scheme is: mainly may further comprise the steps:
(1) carry out setting-out by equidistant (XR) in the open air, be referred to as to call acceptance point, the setting-out total length should be greater than this darkest zone of interest buried depth in district;
(2) at an end of Loft Line, between two acceptance points, carry out the setting-out of shot point by equidistant (Δ x), XR is the integral multiple of Δ x;
(3) wave detector is set on acceptance point, on shot point, arranges man-made explosion;
(4) use digital seismograph to carry out the artificial excitation, receive the seismic data typing storage medium that is produced;
(5) indoor the geological data of typing storage medium, become a road collection by the geophone offset series arrangement;
(6) press Δ x, 2 Δ x, 3 Δ x ..., n Δ x is that track pitch is taken out and generated a series of new road collection;
(7) the newly-generated road collection of comparative analysis is determined track pitch and maximum offset.Can also be as follows in the adding step:
(8) at the other end of Loft Line, carry out the setting-out of shot point by Δ x between two acceptance points, same XR is the integral multiple of Δ x; Repeat described step (3)-(7) described content, can obtain the track pitch and the maximum offset of opposite excitation direction.
Adopt GPS when carrying out setting-out by equidistant (XR) in the open air.
The setting-out total length should be greater than 2-3 times of this darkest zone of interest buried depth in district.
Shot point is positioned at the two ends of acceptance point, and acceptance point is shot point 5-10 times apart from Δ x apart from XR.
The geological data that is received generates a road collection by the geophone offset size order.
The integral multiple (1-10 doubly) of pressing Δ x generates a series of new road collection, is referred to as to call new single shot record.
Utilize the continuity of reflection line-ups and amplitude, phase place, frequecy characteristic comparative analysis to determine track pitch.
According to the reflection interval of subsurface reflective boundary, comparative analysis single shot record, definite maximum offset.
The invention has the beneficial effects as follows: simple, the selection that solves track pitch and maximum offset depends on this defective of Theoretical Calculation; In the seismic prospecting newly developed area or the clear area implement seismic prospecting, can shorten construction period, improve exploration efficiency, obtain bigger economic benefit; To the evaluation work in early stage of exploration investment, has crucial meaning simultaneously.
Four, description of drawings:
Accompanying drawing 1 is the process flow diagram of test method of the present invention;
The synoptic diagram of field acquisition of the present invention during accompanying drawing 2.
Five, embodiment:
In conjunction with the accompanying drawings 1 and 2, the invention will be further described:
Its technical scheme may further comprise the steps:
(1) carries out setting-out with GPS by equidistant (XR) in the open air, be referred to as to call acceptance point.The setting-out total length should be greater than 2-3 times of this darkest zone of interest buried depth in district;
(2) at an end of Loft Line, between two acceptance points, carry out the setting-out of shot point by equidistant (Δ x), XR is the integral multiple (general 5-10 doubly) of Δ x;
(3) embedding wave detector on acceptance point.On shot point, if use explosive, then should keep its excitation well depth as man-made explosion, excite dose in full accord; If use vibroseis as man-made explosion, it is in full accord then should to remain on each shot point institute's operation parameter;
(4) use digital seismograph to carry out the artificial excitation, receive the seismic data typing tape that is produced;
(5) indoor the geological data of typing tape is utilized seismic data processing software, be arranged in a road collection by the ascending or descending order of geophone offset;
(6) press Δ x, 2 Δ x, 3 Δ x ..., n Δ x is that track pitch is taken out and generated a series of new single shot records;
(7) according to the sampling law, press the continuity of reflection line-ups and amplitude, phase place, frequecy characteristic, the newly-generated single shot record of comparative analysis repeatedly, track pitch is determined in last requirement according to geological tasks;
(8) according to the reflection interval of subsurface reflective boundary, the comparative analysis single shot record is determined maximum offset;
(9) at the other end of Loft Line, carry out the setting-out of shot point by Δ x between two acceptance points, same XR is the integral multiple of Δ x; Repeat the described content in above-mentioned (3)-(8), can obtain the track pitch and the maximum offset of opposite excitation direction.
Main process is as follows: with GPS at seismic prospecting construct regional all acceptance points of pointwise setting-out and shot point; Drilling well on shot point keeps the well depth unanimity of each mouthful, the dose unanimity, and explosive is down to the same degree of depth; Utilize the digital seismograph point-by-point excitation then, the signal record that the wave detector that is embedded on the acceptance point is received is on tape; Processing is reset and taken out to the utilization earthquake data processing system to gathering the seismic trace that obtains, and generates a series of new road collection records; Comparative analysis by to the continuity of new road collection reflection line-ups and amplitude, frequency, phase characteristic obtains track pitch and maximum offset.
Claims (9)
1, a kind of seismic prospecting track pitch, maximum offset are selected the field test method, it is characterized in that mainly may further comprise the steps:
(1) carry out setting-out by equidistant (XR) in the open air, be referred to as to call acceptance point, the setting-out total length should be greater than this darkest zone of interest buried depth in district;
(2) at an end of Loft Line, between two acceptance points, carry out the setting-out of shot point by equidistant (Δ x), XR is the integral multiple of Δ x;
(3) wave detector is set on acceptance point, on shot point, arranges man-made explosion;
(4) use digital seismograph to carry out the artificial excitation, receive the seismic data typing storage medium that is produced;
(5) indoor the geological data of typing storage medium, become a road collection by the geophone offset series arrangement;
(6) press Δ x, 2 Δ x, 3 Δ x ..., n Δ x is that track pitch is taken out and generated a series of new road collection;
(7) the newly-generated road collection of comparative analysis is determined track pitch and maximum offset.
2, seismic prospecting track pitch according to claim 1, maximum offset are selected the field test method, it is characterized in that: can also be as follows in the adding step:
(8) at the other end of Loft Line, carry out the setting-out of shot point by Δ x between two acceptance points, same XR is the integral multiple of Δ x; Repeat described step (3)-(7) described content, can obtain the track pitch and the maximum offset of opposite excitation direction.
3, seismic prospecting track pitch according to claim 1, maximum offset are selected the field test method, it is characterized in that: adopt GPS when carrying out setting-out by equidistant (XR) in the open air.
4, the field test method of seismic prospecting track pitch according to claim 1, maximum offset selection is characterized in that the setting-out total length should be greater than 2-3 times of this darkest zone of interest buried depth in district.
5, the field test method of seismic prospecting track pitch according to claim 1, maximum offset selection is characterized in that shot point is positioned at the two ends of acceptance point, and acceptance point is shot point 5-10 times apart from Δ x apart from XR.
6, the field test method of seismic prospecting track pitch according to claim 1, maximum offset selection is characterized in that the geological data that is received generates a road collection by the geophone offset size order.
7, the field test method of seismic prospecting track pitch according to claim 1, maximum offset selection is characterized in that the integral multiple (1-10 doubly) by Δ x generates a series of new road collection, is referred to as to call new single shot record.
8, the field test method selected of seismic prospecting track pitch according to claim 1, maximum offset is characterized in that utilizing the continuity of reflection line-ups and amplitude, phase place, frequecy characteristic comparative analysis to determine track pitch.
9, the field test method of seismic prospecting track pitch according to claim 1, maximum offset selection is characterized in that the reflection interval according to subsurface reflective boundary, comparative analysis single shot record, definite maximum offset.
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| CNB2006100420450A CN100489559C (en) | 2006-01-18 | 2006-01-18 | Field test method for selection of seismic exploration trace-to-trace distance and maximum shot-to-geophone distance |
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| CNB2006100420450A CN100489559C (en) | 2006-01-18 | 2006-01-18 | Field test method for selection of seismic exploration trace-to-trace distance and maximum shot-to-geophone distance |
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| CN1804662A true CN1804662A (en) | 2006-07-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107085236A (en) * | 2017-03-23 | 2017-08-22 | 中国石油天然气集团公司 | The determination method and apparatus of maximum offset |
| CN111308551A (en) * | 2020-03-12 | 2020-06-19 | 王美琪 | Distance radius inner shot number mean value standard evaluation method |
| CN112394388A (en) * | 2019-08-12 | 2021-02-23 | 中国石油天然气集团有限公司 | Method and device for determining distance separation sliding scanning distance parameter of controllable seismic source |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1257412C (en) * | 2003-10-31 | 2006-05-24 | 中国石油化工股份有限公司 | Method for determining underground speed structure for oil exploration |
| CN1310040C (en) * | 2004-06-25 | 2007-04-11 | 中国石油化工股份有限公司 | Correcting method and system for gun point or demodulator probe in earthquake prospection |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107085236A (en) * | 2017-03-23 | 2017-08-22 | 中国石油天然气集团公司 | The determination method and apparatus of maximum offset |
| CN112394388A (en) * | 2019-08-12 | 2021-02-23 | 中国石油天然气集团有限公司 | Method and device for determining distance separation sliding scanning distance parameter of controllable seismic source |
| CN111308551A (en) * | 2020-03-12 | 2020-06-19 | 王美琪 | Distance radius inner shot number mean value standard evaluation method |
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| CN100489559C (en) | 2009-05-20 |
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