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公开(公告)号：US20220221607A1
公开(公告)日：2022-07-14
申请号：US17148611
申请日：2021-01-14
发明人： Taher M. Sodagar , Amin Z. Alali
摘要： A method of obtaining a relative amplitude preserved seismic volume acquired in a time-domain for a subterranean region of interest and transforming it into a low-frequency monospectral amplitude volume. The method further determines a seismic attenuation volume from the relative amplitude preserved seismic volume acquired in the time-domain. Furthermore, the method generates a low-frequency monospectral amplitude map for a surface of interest by averaging the low-frequency monospectral amplitude volume over a depth-window around the surface of interest, and generates a seismic attenuation map for a surface of interest by averaging the seismic attenuation volume over a depth-window around the surface of interest. The method further determines an attribute map based on the seismic attenuation map and the low-frequency monospectral amplitude map for the surface of interest, and determines a presence of gas in the subterranean region of interest based on the attribute map.
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公开(公告)号：US11977198B2
公开(公告)日：2024-05-07
申请号：US17064025
申请日：2020-10-06
IPC分类号： G01V1/30
CPC分类号： G01V1/307 , G01V1/302 , G01V2210/22 , G01V2210/63
摘要： A method that includes transforming a relative amplitude preserved 3D seismic volume acquired in the time-domain into a plurality of isofrequency volumes, extracting from the plurality of isofrequency volumes a first isofrequency spectral amplitude volume and a second isofrequency spectral amplitude volume. The method further includes determining an attribute volume from the two isofrequency spectral amplitude volumes, and determining a presence of gas in a subterranean region of interest based on the attribute volume.
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公开(公告)号：US20230324576A1
公开(公告)日：2023-10-12
申请号：US17655925
申请日：2022-03-22
发明人： Taher M. Sodagar , Amin Z. Alali
IPC分类号： G01V1/50
CPC分类号： G01V1/50 , G01V2210/1295 , G01V2210/142 , G01V2210/65
摘要： Disclosed are methods, systems, and computer-readable medium to perform operations including: spectrally decomposing seismic data associated with a target subsurface area into a plurality of iso-frequency volumes; selecting a low-frequency volume and a high-frequency volume from the plurality of iso-frequency volumes; dividing the low-frequency volume by the high-frequency volume to generate a frequency ratio volume for the target subsurface area; establishing a time-depth relationship in the target subsurface area; extracting, based on the time-depth relationship and the frequency ratio volume, an iso-frequency ratio log in the target subsurface area; and using the iso-frequency ratio log to identify a subsurface gas reservoir in the target subsurface area.
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公开(公告)号：US20240309744A1
公开(公告)日：2024-09-19
申请号：US18182958
申请日：2023-03-13
发明人： Taher M. Sodagar , Amin Z. Alali , Ahmed M. Otaibi
CPC分类号： E21B44/00 , G01V1/282 , G01V1/302 , G01V1/345 , E21B2200/20 , G01V2210/512
摘要： Examples of methods and systems are disclosed. The methods include, obtaining a seismic dataset regarding a subsurface region of interest, wherein the seismic dataset comprises a plurality of time-domain seismic traces. The methods also include determining a plurality of single-frequency volumes from the plurality of time-domain seismic traces. The methods further include determining a frequency ratio volume based, at least in part, on the plurality of single-frequency volumes. The methods still further include extracting a three-dimensional (3D) geological body based, at least in part, on the frequency ratio volume. The methods further include determining a drilling target in the subsurface region based on the 3D geological body.
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公开(公告)号：US11592589B2
公开(公告)日：2023-02-28
申请号：US17148611
申请日：2021-01-14
发明人： Taher M. Sodagar , Amin Z. Alali
摘要： A method of obtaining a relative amplitude preserved seismic volume acquired in a time-domain for a subterranean region of interest and transforming it into a low-frequency monospectral amplitude volume. The method further determines a seismic attenuation volume from the relative amplitude preserved seismic volume acquired in the time-domain. Furthermore, the method generates a low-frequency monospectral amplitude map for a surface of interest by averaging the low-frequency monospectral amplitude volume over a depth-window around the surface of interest, and generates a seismic attenuation map for a surface of interest by averaging the seismic attenuation volume over a depth-window around the surface of interest. The method further determines an attribute map based on the seismic attenuation map and the low-frequency monospectral amplitude map for the surface of interest, and determines a presence of gas in the subterranean region of interest based on the attribute map.
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公开(公告)号：US20220113439A1
公开(公告)日：2022-04-14
申请号：US17066890
申请日：2020-10-09
发明人： Taher M. Sodagar , Ahmed M. Alhamad
摘要： A method of processing a three-dimensional (3D) seismic dataset includes: producing a relative amplitude preserved (RAP) processed seismic volume that includes a reservoir from the 3D seismic dataset; decomposing the RAP processed seismic volume into a first iso-frequency volume; generating a first overburden sediment interval map and a first reservoir interval zone map for the first iso-frequency volume; generating and outputting a first ratio map for the first iso-frequency volume by dividing the first overburden sediment interval map by the first reservoir interval zone map; and characterizing a fluid content of the reservoir based on the first ratio map.
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7.发明授权公开(公告)号：US11821307B2
公开(公告)日：2023-11-21
申请号：US17495459
申请日：2021-10-06
发明人： Amin Z. Alali , Taher M. Sodagar
CPC分类号： E21B49/00 , G01V1/307 , G01V1/345 , E21B2200/20
摘要： Methods and systems for determining a spectral ratio log using a time domain seismic image and a seismic velocity model are disclosed. The method includes determining a first mono-spectral seismic image and a second mono-spectral seismic image from the time domain seismic image. The method further includes determining a time domain spectral ratio image from the first mono-spectral seismic image and the second mono-spectral seismic image and transforming the time domain spectral ratio image into a depth domain spectral ratio image using the seismic velocity model. The method still further includes defining a wellbore path through the depth domain spectral ratio image and determining a spectral ratio log along the wellbore path from the depth domain spectral ratio.
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公开(公告)号：US11333780B2
公开(公告)日：2022-05-17
申请号：US17066890
申请日：2020-10-09
发明人： Taher M. Sodagar , Ahmed M. Alhamad
摘要： A method of processing a three-dimensional (3D) seismic dataset includes: producing a relative amplitude preserved (RAP) processed seismic volume that includes a reservoir from the 3D seismic dataset; decomposing the RAP processed seismic volume into a first iso-frequency volume; generating a first overburden sediment interval map and a first reservoir interval zone map for the first iso-frequency volume; generating and outputting a first ratio map for the first iso-frequency volume by dividing the first overburden sediment interval map by the first reservoir interval zone map; and characterizing a fluid content of the reservoir based on the first ratio map.
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公开(公告)号：US20220107435A1
公开(公告)日：2022-04-07
申请号：US17064025
申请日：2020-10-06
IPC分类号： G01V1/30
摘要： A method that includes transforming a relative amplitude preserved 3D seismic volume acquired in the time-domain into a plurality of isofrequency volumes, extracting from the plurality of isofrequency volumes a first isofrequency spectral amplitude volume and a second isofrequency spectral amplitude volume. The method further includes determining an attribute volume from the two isofrequency spectral amplitude volumes, and determining a presence of gas in a subterranean region of interest based on the attribute volume.
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