# US 2024/0201405 A1 · Seismic inversion downscaling and extrapolation for generation of seismic images > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0201405 A1 - Document ID: US20240201405A1 - Status: Published application - Kind: A1 - Application number: 18/084,148 - Filed: 2022-12-19 - Published: 2024-06-20 - Earliest claimed: 2022-12-19 - Assignees: Saudi Arabian Oil Company - Applicants: Saudi Arabian Oil Company - Inventors: Sherif Khattab; Muhammad Ashraf - Web page: https://patentgrep.com/patent/US20240201405A1 ## CPC - G01V 1/282: {Application of seismic models, synthetic seismograms} - G01V 1/306: {for determining physical properties of the subsurface, e.g. impedance, porosity or attenuation profiles} - G01V 1/345: {Visualisation of seismic data or attributes, e.g. in 3D cubes} - G06T 17/05: Geographic models - G01V 2210/61: Analysis by combining or comparing a seismic data set with other data - G01V 2210/6226: Impedance - G01V 2210/64: Geostructures, e.g. in 3D data cubes - G01V 2210/665: using geostatistical modeling - G06T 2200/24: involving graphical user interfaces [GUIs] - G01V: GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS (means for indicating the location of accidentally buried, e.g. snow-buried, persons A63B29/02) - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL ## Abstract Methods for seismic imaging of a subterranean geological formation include receiving first acoustic impedance data, having a first resolution, associated with wells in a subsurface region. A system receives seismic data including second acoustic impedance data having a second resolution. The system performs a quality control process configured to identify a mismatch between the first acoustic impedance data and the second acoustic impedance data. The system resamples the second acoustic impedance data into a three-dimensional (3D) grid model. The system scales up the first acoustic impedance data into the 3D grid model. The system downscales the second acoustic impedance data controlled by the first acoustic impedance data in the 3D grid model. The system generates third acoustic impedance data representing fine-scale impedance data. The system extrapolates the fine-scale impedance into areas or regions having no seismic data coverage or poor seismic data coverage. ## Claims ### Claim 1 A method for seismic imaging of a subterranean geological formation, the method comprising: receiving well logs including first acoustic impedance data associated with one or more wells in a subsurface region including the subterranean geological formation, the first acoustic impedance data having a first resolution; receiving seismic data, the seismic data including second acoustic impedance data having a second resolution that is different than the first resolution; performing a quality control process configured to identify a mismatch between the first acoustic impedance data and the second acoustic impedance data when the mismatch is present; resampling the second acoustic impedance data into a three-dimensional (3D) grid model that includes the subsurface region; scaling up the first acoustic impedance data into the 3D grid model; downscaling the second acoustic impedance data controlled by the first acoustic impedance data in the 3D grid model; generating, based on the first acoustic impedance data and the second acoustic impedance data in the 3D grid model, third acoustic impedance data representing fine-scale impedance data for one or more areas in the subsurface; and extrapolating the fine-scale impedance into areas or regions having no seismic data coverage or poor seismic data coverage. ### Claim 2 (depends on 1) The method of claim 1, further comprising drilling a well based on the third acoustic impedance data. ### Claim 3 (depends on 1) The method of claim 1, wherein downscaling the second acoustic impedance data guided and controlled by the first acoustic impedance data in the 3D grid model comprises applying a sequential Gaussian simulation and a co-located simulation with optimal seismic scale impedance to the first acoustic impedance data and the second acoustic impedance data. ### Claim 4 (depends on 1) The method of claim 1, further comprising performing a trend quality control process on the second acoustic impedance data by performing operations comprising: extracting syncretic logs at a well level for a reservoir interval; comparing, over the reservoir interval, data of the syncretic logs at the well level to the first acoustic impedance data; and determining that a first one-dimensional (1D) trend of the data of the syncretic logs of the second acoustic impedance comports with a second 1D trend of the first acoustic impedance data. ### Claim 5 (depends on 1) The method of claim 1, wherein resampling comprises transforming values from the second acoustic impedance data on a nearest node basis into the 3D grid model. ### Claim 6 (depends on 1) The method of claim 1, wherein the first resolution is 0.5 feet to 1 foot corresponding to a log data resolution, and wherein the second resolution is 25-30 feet, corresponding to a seismic data resolution. ### Claim 7 (depends on 1) The method of claim 1, further comprising rendering, based on the third acoustic impedance data, a seismic image for presentation on a user interface. ### Claim 8 (depends on 1) The method of claim 1, wherein scaling up the first acoustic impedance data into the 3D grid model comprises a cell-based averaging of the first acoustic impedance data. ### Claim 9 A system for seismic imaging of a subterranean geological formation, the system comprising: at least one processor; and a memory storing instructions that, when executed by the at least one processor, cause the at least one processor to perform operations comprising: receiving well logs including first acoustic impedance data associated with one or more wells in a subsurface region including the subterranean geological formation, the first acoustic impedance data having a first resolution; receiving seismic data, the seismic data including second acoustic impedance data having a second resolution that is different than the first resolution; performing a quality control process configured to identify a mismatch between the first acoustic impedance data and the second acoustic impedance data when the mismatch is present; resampling the second acoustic impedance data into a three-dimensional (3D) grid model that includes the subsurface region; scaling up the first acoustic impedance data into the 3D grid model; downscaling the second acoustic impedance data controlled by the first acoustic impedance data in the 3D grid model; generating, based on the first acoustic impedance data and the second acoustic impedance data in the 3D grid model, third acoustic impedance data representing fine-scale impedance data for one or more areas in the subsurface; and extrapolating the fine-scale impedance into areas or regions having no seismic data coverage or poor seismic data coverage. ### Claim 10 (depends on 9) The system of claim 9, the operations further comprising drilling a well based on the third acoustic impedance data. ### Claim 11 (depends on 9) The system of claim 9, wherein downscaling the second acoustic impedance data guided and controlled by the first acoustic impedance data in the 3D grid model comprises applying a sequential Gaussian simulation and a co-located simulation with optimal seismic scale impedance to the first acoustic impedance data and the second acoustic impedance data. ### Claim 12 (depends on 9) The system of claim 9, the operations further comprising: performing a trend quality control process on the second acoustic impedance data by performing operations comprising: extracting syncretic logs at a well level for a reservoir interval; comparing, over the reservoir interval, data of the syncretic logs at the well level to the first acoustic impedance data; and determining that a first one-dimensional (1D) trend of the data of the syncretic logs of the second acoustic impedance comports with a second 1D trend of the first acoustic impedance data. ### Claim 13 (depends on 9) The system of claim 9, wherein resampling comprises transforming values from the second acoustic impedance data on a nearest node basis into the 3D grid model. ### Claim 14 (depends on 9) The system of claim 9, wherein the first resolution is 0.5 feet to 1 foot corresponding to a log data resolution, and wherein the second resolution is 25-30 feet, corresponding to a seismic data resolution. ### Claim 15 (depends on 9) The system of claim 9, the operations further comprising rendering, based on the third acoustic impedance data, a seismic image for presentation on a user interface. ### Claim 16 (depends on 9) The system of claim 9, wherein scaling up the first acoustic impedance data into the 3D grid model comprises a cell-based averaging of the first acoustic impedance data. ### Claim 17 One or more non-transitory computer-readable media storing instructions for seismic imaging of a subterranean geological formation, the instructions, when executed by at least one processor, cause the at least one processor to perform operations comprising: receiving well logs including first acoustic impedance data associated with one or more wells in a subsurface region including the subterranean geological formation, the first acoustic impedance data having a first resolution; receiving seismic data, the seismic data including second acoustic impedance data having a second resolution that is different than the first resolution; performing a quality control process configured to identify a mismatch between the first acoustic impedance data and the second acoustic impedance data when the mismatch is present; resampling the second acoustic impedance data into a three-dimensional (3D) grid model that includes the subsurface region; scaling up the first acoustic impedance data into the 3D grid model; downscaling the second acoustic impedance data controlled by the first acoustic impedance data in the 3D grid model; generating, based on the first acoustic impedance data and the second acoustic impedance data in the 3D grid model, third acoustic impedance data representing fine-scale impedance data for one or more areas in the subsurface; and extrapolating the fine-scale impedance into areas or regions having no seismic data coverage or poor seismic data coverage. ### Claim 18 (depends on 17) The one or more non-transitory computer-readable media of claim 17, further comprising drilling a well based on the third acoustic impedance data. ### Claim 19 (depends on 17) The one or more non-transitory computer-readable media of claim 17, wherein downscaling the second acoustic impedance data guided and controlled by the first acoustic impedance data in the 3D grid model comprises applying a sequential Gaussian simulation and a co-located simulation with optimal seismic scale impedance to the first acoustic impedance data and the second acoustic impedance data. ### Claim 20 (depends on 17) The one or more non-transitory computer-readable media of claim 17, the operations further comprising: performing a trend quality control process on the second acoustic impedance data by performing operations comprising: extracting syncretic logs at a well level for a reservoir interval; comparing, over the reservoir interval, data of the syncretic logs at the well level to the first acoustic impedance data; and determining that a first one-dimensional (1D) trend of the data of the syncretic logs of the second acoustic impedance comports with a second 1D trend of the first acoustic impedance data.