Advanced 3D marine seismic data processing for spatial and dynamic resolution enhancement of the Sakhalin offshore data

UDK: 550.834.05
DOI: 10.24887/0028-2448-2021-3-40-44
Key words: 3D marine seismic survey, signal processing, de-ghosting, de-multiple, depth-velocity modelling, prestack depth migration (PSDM), shallow part anomalies
Authors: S.V. Gorbachev (RN-Shelf-Arctic LLC, RF, Moscow), A.Yu. Nikulnikov (RN-Shelf-Arctic LLC, RF, Moscow), A.S. Kornev (CGG Vostok LLC, RF, Moscow), T.V. Nurmukhamedov (RN-Shelf-Arctic LLC, RF, Moscow), D.N. Myasoedov (RN-Shelf-Arctic LLC, RF, Moscow), G.V. Ulyanov (RN-Shelf-Arctic LLC, RF, Moscow), М.А. Samarkin (Rosneft Oil Company, RF, Moscow)

In recent years, technologies of marine seismic data processing have made a huge leap due to rapid growth of computing power. Many algorithms for signal processing and depth imaging, which had no practical implementation before, now can be applied. Therefore, the question of their proper usage in the processing workflow and quality control of the results becomes as actual as never before. This paper shows an example of marine seismic data processing, acquired in different years offshore Sakhalin Island, which is characterized by complex geological conditions with the presence of near-surface gas in the upper layers of sedimentary rocks and variable acoustic characteristics of the water bottom. In the workflow various signal processing and imaging algorithms were used to improve the quality of data in order to increase the spatial and dynamic resolution for the prediction of reservoir characteristics. The ghost and multiple waves suppression, the results of the dynamic characteristics of different surveys matching are described in detail. Key results of velocity model building and prestack depth migration are also given. In conclusion, a comparison of the results of previous and new processing is given and allows to conclude that usage of modern technologies improved the dynamic characteristics and increased the resolution in the target intervals while preserving true signal characteristics. The processing approach implemented by Rosneft employees  made it possible to significantly detail the geological structure of prospective deposits and identify new local prospecting targets.

References

1. Val'kova E.V., Kornev A.S., Nagaev R.R. et al., Tekhnologiya podavleniya voln-sputnikov s ispol'zovaniem dannykh gidrofonov blizhney zony pri obrabotke morskikh seysmicheskikh dannykh (Satellite wave suppression technology using near-field hydrophone data in marine seismic data processing), Proceedings of 22th scientific and practical conference on geological exploration and development of oil and gas fields "Geomodel 2020", Gelendzhik, September 2020, https://www.elibrary.ru/item.asp?id=44427068

2. Kornev A.S., Savitskiy L.M., Kibal'chich V.Ya. et al., Features of processing seismic data on the shelf of the Barents Sea in conditions of a “hard” water bottom (In Russ.), Geofizika, 2019, no. 3, pp. 34–40.

3. Nikul'nikov A.Yu., Gorbachev S.V., Myasoedov D.N., Nurmukhamedov T.V., The application of quantitative quality control in the processing of seismic data (In Russ.), Geofizika, 2019, no. 1, pp. 55–64.

4. Filimonov A.V., Gorbachev S.V., Lantsev V.V. et al., Features of attenuation of secondary pulsations of the source during processing of marine seismic data of different years (In Russ.), Pribory i sistemy razvedochnoy geofiziki, 2018, no. 1–2, рр. 32–39.

5. Filimonov A.V., Myasoedov N.K., Gorbachev S.V., Broadband processing of 3D

seismic data on the example of the Black Sea shelf (In Russ.),  Nauchno-tekhnicheskiy vestnik   OAO “NK “Rosneft”, 2016, no. 4, pp. 36–39.

6. Popova A.B., Gorbachev S.V., Samarkin M.A., Kurin E.A., Features of 3D data processing in solving complex problems confined to the gas anomalies of Sakhalin Shelf (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2019, no. 4, pp. 28–32.

7. Bai B., Chen C., Yang M., Wan P., Ghost effect analysis and bootstrap deghosting application on marine streamer data, Proceedings of 75th EAGE Conference 2013, https://www.earthdoc.org/content/papers/10.3997/2214-4609.20130491

8. Wang P., Zhuang D., Fu Z., Shen H. et al., Joint 3D source-side deghosting and designature for modern air-gun arrays, Proceedings of 77th EAGE Conference and Exhibition 2015, Jun 2015, Volume 2015, pp. 1–5, https://www.earthdoc.org/content/papers/10.3997/2214-4609.201413190

In recent years, technologies of marine seismic data processing have made a huge leap due to rapid growth of computing power. Many algorithms for signal processing and depth imaging, which had no practical implementation before, now can be applied. Therefore, the question of their proper usage in the processing workflow and quality control of the results becomes as actual as never before. This paper shows an example of marine seismic data processing, acquired in different years offshore Sakhalin Island, which is characterized by complex geological conditions with the presence of near-surface gas in the upper layers of sedimentary rocks and variable acoustic characteristics of the water bottom. In the workflow various signal processing and imaging algorithms were used to improve the quality of data in order to increase the spatial and dynamic resolution for the prediction of reservoir characteristics. The ghost and multiple waves suppression, the results of the dynamic characteristics of different surveys matching are described in detail. Key results of velocity model building and prestack depth migration are also given. In conclusion, a comparison of the results of previous and new processing is given and allows to conclude that usage of modern technologies improved the dynamic characteristics and increased the resolution in the target intervals while preserving true signal characteristics. The processing approach implemented by Rosneft employees  made it possible to significantly detail the geological structure of prospective deposits and identify new local prospecting targets.

References

1. Val'kova E.V., Kornev A.S., Nagaev R.R. et al., Tekhnologiya podavleniya voln-sputnikov s ispol'zovaniem dannykh gidrofonov blizhney zony pri obrabotke morskikh seysmicheskikh dannykh (Satellite wave suppression technology using near-field hydrophone data in marine seismic data processing), Proceedings of 22th scientific and practical conference on geological exploration and development of oil and gas fields "Geomodel 2020", Gelendzhik, September 2020, https://www.elibrary.ru/item.asp?id=44427068

2. Kornev A.S., Savitskiy L.M., Kibal'chich V.Ya. et al., Features of processing seismic data on the shelf of the Barents Sea in conditions of a “hard” water bottom (In Russ.), Geofizika, 2019, no. 3, pp. 34–40.

3. Nikul'nikov A.Yu., Gorbachev S.V., Myasoedov D.N., Nurmukhamedov T.V., The application of quantitative quality control in the processing of seismic data (In Russ.), Geofizika, 2019, no. 1, pp. 55–64.

4. Filimonov A.V., Gorbachev S.V., Lantsev V.V. et al., Features of attenuation of secondary pulsations of the source during processing of marine seismic data of different years (In Russ.), Pribory i sistemy razvedochnoy geofiziki, 2018, no. 1–2, рр. 32–39.

5. Filimonov A.V., Myasoedov N.K., Gorbachev S.V., Broadband processing of 3D

seismic data on the example of the Black Sea shelf (In Russ.),  Nauchno-tekhnicheskiy vestnik   OAO “NK “Rosneft”, 2016, no. 4, pp. 36–39.

6. Popova A.B., Gorbachev S.V., Samarkin M.A., Kurin E.A., Features of 3D data processing in solving complex problems confined to the gas anomalies of Sakhalin Shelf (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2019, no. 4, pp. 28–32.

7. Bai B., Chen C., Yang M., Wan P., Ghost effect analysis and bootstrap deghosting application on marine streamer data, Proceedings of 75th EAGE Conference 2013, https://www.earthdoc.org/content/papers/10.3997/2214-4609.20130491

8. Wang P., Zhuang D., Fu Z., Shen H. et al., Joint 3D source-side deghosting and designature for modern air-gun arrays, Proceedings of 77th EAGE Conference and Exhibition 2015, Jun 2015, Volume 2015, pp. 1–5, https://www.earthdoc.org/content/papers/10.3997/2214-4609.201413190


Attention!
To buy the complete text of article (a format - PDF) or to read the material which is in open access only the authorized visitors of the website can. .

Mobile applications

Read our magazine on mobile devices

Загрузить в Google play

Press Releases

11.10.2021
07.10.2021
29.09.2021
Конкурс на соискание молодежной премии имени академика И.М. Губкина