US 12,405,396 B2
Holographic inversion for hydrocarbon indicator
Lu Liu, Beijing (CN); Fuhao Qin, Dhahran (SA); Yi Luo, Dhahran (SA); and Yubing Li, Beijing (CN)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Appl. No. 18/001,196
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
PCT Filed Mar. 18, 2022, PCT No. PCT/CN2022/081657
§ 371(c)(1), (2) Date Dec. 8, 2022,
PCT Pub. No. WO2023/173399, PCT Pub. Date Sep. 21, 2023.
Prior Publication US 2024/0337767 A1, Oct. 10, 2024
Int. Cl. G01V 1/30 (2006.01)
CPC G01V 1/307 (2013.01) 17 Claims
OG exemplary drawing
 
1. A method of determining a presence of hydrocarbons, comprising:
obtaining a surface seismic dataset,
wherein the surface seismic dataset comprises a plurality of seismic gathers; for each member of the plurality of seismic gathers, using a computer processor:
determining a redatumed gather for a target horizon based, at least in part, on the seismic gather,
wherein each redatumed gather comprises a plurality of redatumed traces,
determining a time window of the redatumed gather around the target horizon, and determining a spectrum of a portion within the time window,
determining a hydrocarbon indicator based, at least in part, on an amplitude of a higher-frequency portion of the spectrum and an amplitude of a lower-frequency portion of the spectrum of the plurality of seismic gathers;
determining, using the computer processor, a geographic map of values of the hydrocarbon indicator from the plurality of seismic gathers;
determining, using the computer processor, a presence of hydrocarbons based, at least in part, on at least one anomalous value on the geographic map;
planning a wellbore trajectory based, at least in part, on the map of the hydrocarbon indicator; and
drilling the wellbore trajectory.