Advantages of Shear Wave Seismic in Morrow Sandstone Detection
The Upper Morrow sandstones in the western Anadarko Basin have been prolific oil producers for more than five decades. Detection of Morrow sandstones is a major problem in the exploration of new fields and the characterization of existing fields because they are often very thin and laterally discont...
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Wiley
2011-01-01
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| Series: | International Journal of Geophysics |
| Online Access: | http://dx.doi.org/10.1155/2011/958483 |
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| author | Paritosh Singh Thomas Davis |
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| author_sort | Paritosh Singh |
| collection | DOAJ |
| description | The Upper Morrow sandstones in the western Anadarko Basin have been prolific oil producers for more than five decades. Detection of Morrow sandstones is a major problem in the exploration of new fields and the characterization of existing fields because they are often very thin and laterally discontinuous. Until recently compressional wave data have been the primary resource for mapping the lateral extent of Morrow sandstones. The success with compressional wave datasets is limited because the acoustic impedance contrast between the reservoir sandstones and the encasing shales is small. Here, we have performed full waveform modeling study to understand the Morrow sandstone signatures on compressional wave (P-wave), converted-wave (PS-wave) and pure shear wave (S-wave) gathers. The contrast in rigidity between the Morrow sandstone and surrounding shale causes a strong seismic expression on the S-wave data. Morrow sandstone shows a distinct high amplitude event in pure S-wave modeled gathers as compared to the weaker P- and PS-wave events. Modeling also helps in understanding the adverse effect of interbed multiples (due to shallow high velocity anhydrite layers) and side lobe interference effects at the Morrow level. Modeling tied with the field data demonstrates that S-waves are more robust than P-waves in detecting the Morrow sandstone reservoirs. |
| format | Article |
| id | doaj-art-7e025e3a041f42aaafe60c5d7d3d8c8e |
| institution | Kabale University |
| issn | 1687-885X 1687-8868 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
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| series | International Journal of Geophysics |
| spelling | doaj-art-7e025e3a041f42aaafe60c5d7d3d8c8e2025-02-03T05:48:11ZengWileyInternational Journal of Geophysics1687-885X1687-88682011-01-01201110.1155/2011/958483958483Advantages of Shear Wave Seismic in Morrow Sandstone DetectionParitosh Singh0Thomas Davis1Colorado School of Mines, Golden, CO 80401-1843, USAColorado School of Mines, Golden, CO 80401-1843, USAThe Upper Morrow sandstones in the western Anadarko Basin have been prolific oil producers for more than five decades. Detection of Morrow sandstones is a major problem in the exploration of new fields and the characterization of existing fields because they are often very thin and laterally discontinuous. Until recently compressional wave data have been the primary resource for mapping the lateral extent of Morrow sandstones. The success with compressional wave datasets is limited because the acoustic impedance contrast between the reservoir sandstones and the encasing shales is small. Here, we have performed full waveform modeling study to understand the Morrow sandstone signatures on compressional wave (P-wave), converted-wave (PS-wave) and pure shear wave (S-wave) gathers. The contrast in rigidity between the Morrow sandstone and surrounding shale causes a strong seismic expression on the S-wave data. Morrow sandstone shows a distinct high amplitude event in pure S-wave modeled gathers as compared to the weaker P- and PS-wave events. Modeling also helps in understanding the adverse effect of interbed multiples (due to shallow high velocity anhydrite layers) and side lobe interference effects at the Morrow level. Modeling tied with the field data demonstrates that S-waves are more robust than P-waves in detecting the Morrow sandstone reservoirs.http://dx.doi.org/10.1155/2011/958483 |
| spellingShingle | Paritosh Singh Thomas Davis Advantages of Shear Wave Seismic in Morrow Sandstone Detection International Journal of Geophysics |
| title | Advantages of Shear Wave Seismic in Morrow Sandstone Detection |
| title_full | Advantages of Shear Wave Seismic in Morrow Sandstone Detection |
| title_fullStr | Advantages of Shear Wave Seismic in Morrow Sandstone Detection |
| title_full_unstemmed | Advantages of Shear Wave Seismic in Morrow Sandstone Detection |
| title_short | Advantages of Shear Wave Seismic in Morrow Sandstone Detection |
| title_sort | advantages of shear wave seismic in morrow sandstone detection |
| url | http://dx.doi.org/10.1155/2011/958483 |
| work_keys_str_mv | AT paritoshsingh advantagesofshearwaveseismicinmorrowsandstonedetection AT thomasdavis advantagesofshearwaveseismicinmorrowsandstonedetection |