RU95107649A - METHOD FOR FORMING SEISMIC DATA USING SEISMIC VIBRATOR (OPTIONS) - Google Patents
METHOD FOR FORMING SEISMIC DATA USING SEISMIC VIBRATOR (OPTIONS)Info
- Publication number
- RU95107649A RU95107649A RU95107649/25A RU95107649A RU95107649A RU 95107649 A RU95107649 A RU 95107649A RU 95107649/25 A RU95107649/25 A RU 95107649/25A RU 95107649 A RU95107649 A RU 95107649A RU 95107649 A RU95107649 A RU 95107649A
- Authority
- RU
- Russia
- Prior art keywords
- scan
- sequence
- cascaded
- sweep
- segments
- Prior art date
Links
- 230000002596 correlated Effects 0.000 claims 5
- 230000015572 biosynthetic process Effects 0.000 claims 2
Claims (12)
(а) формируют первую последовательность каскадированных разверток, состоящую из N количества сегментов развертки, соединенных концами, где N равно или больше 2, причем N сегменты развертки являются, по существу, идентичными, за исключением, что начальные фазовые углы N сегментов развертки поступательно вращаются на постоянное приращение фазы примерно на 36o/N;
(в) формируют вторую последовательность каскадированных разверток, состоящую из ( i ) N количества последовательных сегментов, соединенных концами, причем N - последовательные сегменты развертки соответствуют первой последовательности каскадированных разверток, и (ii) дополнительного сегмента развертки, соединенного с N последовательными сегментами развертки;
(с) применяют одну из упомянутых последовательностей каскадированных разверток для последовательности развертки вибратора для привода сейсмического вибратора, таким образом формируют сейсмический сигнал, который распространяется в землю;
(d) записывают некоррелированные сейсмические данные, полученные в результате отражения сейсмического сигнала от подземных геологических формаций;
(е) применяют другую из упомянутых последовательностей каскадированных разверток в качестве опорной последовательности корреляции; и
(f) коррелируют сейсмические данные с использованием упомянутой опорной последовательности корреляции, причем дополнительный сегмент развертки во второй последовательности каскадированной развертки расположен и фазирован таким образом, чтобы, по существу, подавлять гармонические помехи во время корреляции сейсмических данных.1. The method of generating seismic data using a seismic vibrator, characterized in that:
(a) form a first cascaded scan sequence consisting of N number of scan segments connected by ends, where N is equal to or greater than 2, wherein N scan segments are substantially identical, except that the initial phase angles of N scan segments are progressively rotated by a constant phase increment of about 36 o / N;
(c) form a second sequence of cascaded sweeps, consisting of (i) N number of consecutive segments connected by ends, N - consecutive sweep segments correspond to the first sequence of cascaded sweeps, and (ii) an additional sweep segment connected to N consecutive sweep segments;
(c) apply one of the cascaded sweep sequences to the vibrator sweep sequence to drive the seismic vibrator, thereby generating a seismic signal that propagates into the ground;
(d) record uncorrelated seismic data obtained as a result of reflection of the seismic signal from underground geological formations;
(e) apply another of the cascaded sweep sequences as a reference correlation sequence; and
(f) seismic data is correlated using said correlation reference sequence, wherein an additional sweep segment in the second cascaded sweep is positioned and phased so as to substantially suppress harmonic interference during seismic data correlation.
(а) формируют первую группу последовательностей, имеющую:
(i) первую последовательность каскадированной развертки, состоящую из N сегментов развертки, соединенных концами, где N равно или больше 2, причем N сегменты развертки являются, по существу, идентичными, за исключением, что начальные фазовые углы N сегментов развертки поступательно вращаются на постоянное фазовое приращение примерно 36o/N, и
(ii) вторую последовательность каскадированной развертки, состоящую из:
(А) N последовательных сегментов развертки, соединенных концами, причем N последовательные сегменты развертки соответствуют первой последовательности каскадированной развертки,
(В) дополнительного сегмента развертки, соединенного с N последовательными сегментами развертки;
(b) формируют вторую группу последовательностей, имеющую:
(i) третью последовательность каскадированной развертки, по существу, идентичную с первой последовательностью каскадированной развертки, за исключением, что начальные фазовые углы третьей последовательности каскадированной развертки вращают в противоположном направлении от начальных фазовых углов первой последовательности каскадированной развертки, и
(ii) четвертую последовательность каскадированной развертки, по существу, идентичной с второй последовательностью каскадированной развертки, за исключением, что начальные фазовые углы четвертой последовательности каскадированной развертки вращают в противоположном направлении от начальных фазовых углов второй последовательности каскадированной развертки;
(с) применяют одну из первой и второй последовательностей каскадированной развертки в качестве последовательности развертки вибратора для привода сейсмического вибратора, посредством чего формируют сейсмический сигнал в предварительно выбранном месте источника;
(d) записывают некоррелированные сейсмические данные, полученные в результате отражения сейсмического сигнала от подземных геологических формаций;
(е) применяют другую из первой и второй последовательностей каскадированной развертки в качестве опорной последовательности корреляции для корреляции сейсмических данных, таким образом формируют первую группу коррелированных сейсмических данных для упомянутой предварительно выбранной точки источника, причем дополнительный сегмент развертки во второй последовательности каскадированной развертки располагают и фазируют так, чтобы, по существу, подавлять гармонические помехи во время корреляции;
(f) применяют третью и четвертую последовательности каскадированной развертки таким же образом соответственно, как первую и вторую последовательности каскадированной развертки для формирования второй группы коррелированных сейсмических данных для предварительно выбранной точки источника; и
(g) добавляют первую группу коррелированных данных к второй группе коррелированных данных.12. A method of generating seismic data using a seismic vibrator, characterized in that:
(a) form the first group of sequences having:
(i) a first cascaded scan sequence consisting of N scan segments connected by ends, where N is equal to or greater than 2, wherein N scan segments are substantially identical, except that the initial phase angles of N scan segments are progressively rotated to a constant phase an increment of about 36 o / N, and
(ii) a second cascaded sweep sequence consisting of:
(A) N consecutive sweep segments connected by ends, wherein N consecutive sweep segments correspond to a first cascaded sweep sequence,
(B) an additional sweep segment connected to N consecutive sweep segments;
(b) form a second group of sequences having:
(i) a third cascaded scan sequence substantially identical to the first cascaded scan sequence, except that the initial phase angles of the third cascaded scan sequence are rotated in the opposite direction from the initial phase angles of the first cascaded scan sequence, and
(ii) a fourth cascaded scan sequence substantially identical to the second cascaded scan sequence, except that the initial phase angles of the fourth cascaded scan sequence are rotated in the opposite direction from the initial phase angles of the second cascaded scan sequence;
(c) using one of the first and second cascaded scan sequences as a vibrator scan sequence for driving a seismic vibrator, whereby a seismic signal is generated at a preselected source location;
(d) record uncorrelated seismic data obtained as a result of reflection of the seismic signal from underground geological formations;
(e) use the other of the first and second cascaded scan sequences as a correlation reference sequence for correlating seismic data, thereby forming a first group of correlated seismic data for said preselected source point, wherein an additional scan segment in the second cascaded scan sequence is positioned and phased so so as to substantially suppress harmonic interference during correlation;
(f) apply the third and fourth cascaded scan sequences in the same manner, respectively, as the first and second cascaded scan sequences to generate a second group of correlated seismic data for a preselected source point; and
(g) add a first group of correlated data to a second group of correlated data.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/242,751 | 1994-05-13 | ||
US08/242,751 US5410517A (en) | 1994-05-13 | 1994-05-13 | Method for cascading sweeps for a seismic vibrator |
Publications (2)
Publication Number | Publication Date |
---|---|
RU95107649A true RU95107649A (en) | 1997-12-27 |
RU2126983C1 RU2126983C1 (en) | 1999-02-27 |
Family
ID=22916039
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RU95107649A RU2126983C1 (en) | 1994-05-13 | 1995-05-12 | Process forming seismic data with use of seismic vibrator (versions) |
Country Status (8)
Country | Link |
---|---|
US (1) | US5410517A (en) |
CN (1) | CN1065630C (en) |
AU (1) | AU684149B2 (en) |
CA (1) | CA2146181C (en) |
FR (1) | FR2719908B1 (en) |
GB (1) | GB2289336B (en) |
OA (1) | OA09974A (en) |
RU (1) | RU2126983C1 (en) |
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1994
- 1994-05-13 US US08/242,751 patent/US5410517A/en not_active Expired - Lifetime
-
1995
- 1995-04-03 CA CA002146181A patent/CA2146181C/en not_active Expired - Lifetime
- 1995-05-10 GB GB9509418A patent/GB2289336B/en not_active Expired - Lifetime
- 1995-05-11 AU AU17995/95A patent/AU684149B2/en not_active Expired
- 1995-05-12 RU RU95107649A patent/RU2126983C1/en active
- 1995-05-12 CN CN95106062A patent/CN1065630C/en not_active Expired - Lifetime
- 1995-05-12 FR FR9505639A patent/FR2719908B1/en not_active Expired - Lifetime
- 1995-05-12 OA OA60659A patent/OA09974A/en unknown
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