%0 Conference Paper %1 li_etal:2006 %A Li, X. Y. %A Chen, S. %A Sun, X. %A Pei, J. %A Dai, H. %B 68th EAGE Conference and Exhibition %C Vienna, Austria %D 2006 %K geophysics seismics %P A005+ %T Multicomponent PP and PS seismic response from volcanic gas reservoirs %U http://www.earthdoc.org/detail.php?pubid=225 %X Here we present an example of using PP and PS converted-waves for characterizing volcanic gas reservoirs in Daqing Oilfield in Northeast China. The volcanic targets are buried at depth raging from 2800m to 3600m, which often give rise to incoherent P-wave response. To overcome this problem, a multicomponent seismic experiment was set up to evaluate the converted-waves recorded by digital MEMS (micro-electro-mechanical system) sensors. The experiment includes six 2D lines, passing through ten boreholes drilled for the volcanic reservoirs. Several multicomponent VSPs have also been acquired for correlation purposes. Analysis the P- and S-waves from the target formation at the ten borehole locations reveals very consistent P- and S-wave amplitude anomalies. From the gas producing wells, the P-wave reflection is consistently weak and scattered, whilst the PS-wave reflection are consistently strong and continuous. In contrast from the non-producing wells, both PP- and PS-waves show continuous and strong reflections. The gas reservoirs can then be delineated from joint PP- and PS-amplitude analysis and the results agree with the drilling results in the study area. This provides conclusive evidence demonstrating the benefit of multicomponent seismic data from digital MEMS sensors.

@inproceedings{li_etal:2006, abstract = {Here we present an example of using PP and PS converted-waves for characterizing volcanic gas reservoirs in Daqing Oilfield in Northeast China. The volcanic targets are buried at depth raging from 2800m to 3600m, which often give rise to incoherent P-wave response. To overcome this problem, a multicomponent seismic experiment was set up to evaluate the converted-waves recorded by digital MEMS (micro-electro-mechanical system) sensors. The experiment includes six 2D lines, passing through ten boreholes drilled for the volcanic reservoirs. Several multicomponent VSPs have also been acquired for correlation purposes. Analysis the P- and S-waves from the target formation at the ten borehole locations reveals very consistent P- and S-wave amplitude anomalies. From the gas producing wells, the P-wave reflection is consistently weak and scattered, whilst the PS-wave reflection are consistently strong and continuous. In contrast from the non-producing wells, both PP- and PS-waves show continuous and strong reflections. The gas reservoirs can then be delineated from joint PP- and PS-amplitude analysis and the results agree with the drilling results in the study area. This provides conclusive evidence demonstrating the benefit of multicomponent seismic data from digital MEMS sensors.}, added-at = {2012-09-01T13:08:21.000+0200}, address = {Vienna, Austria}, author = {Li, X. Y. and Chen, S. and Sun, X. and Pei, J. and Dai, H.}, biburl = {https://www.bibsonomy.org/bibtex/2e08fa8a03226c5397e0b63abae38d220/nilsma}, booktitle = {68th EAGE Conference and Exhibition}, interhash = {0af584ac407dd95f8c4eef3ea880ed18}, intrahash = {e08fa8a03226c5397e0b63abae38d220}, keywords = {geophysics seismics}, month = jun, organization = {European Association of Geoscientists and Engineers}, pages = {A005+}, timestamp = {2021-02-09T13:27:42.000+0100}, title = {Multicomponent PP and PS seismic response from volcanic gas reservoirs}, url = {http://www.earthdoc.org/detail.php?pubid=225}, year = 2006 }