US 11,719,851 B2
Method and system for predicting formation top depths
Marei Saeed Al-Garni, Dhahran (SA); Mohammed Sabri Al Madani, Dhahran (SA); Maan Abdullah AlHawi, Ad Dammam (SA); Mohammed AlRashed, Al Khubar (SA); and Abdulrahman Albar, Al Khobar (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Sep. 2, 2020, as Appl. No. 17/10,325.
Prior Publication US 2022/0066064 A1, Mar. 3, 2022
Int. Cl. E21B 49/00 (2006.01); G01V 1/40 (2006.01); G01V 5/06 (2006.01); G01V 99/00 (2009.01); G06N 20/00 (2019.01); G06N 3/04 (2023.01); G01V 1/28 (2006.01)
CPC G01V 5/06 (2013.01) [E21B 49/00 (2013.01); G01V 1/28 (2013.01); G01V 1/40 (2013.01); G01V 99/005 (2013.01); G06N 3/04 (2013.01); E21B 2200/20 (2020.05); G01V 2210/6169 (2013.01); G01V 2210/66 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method, comprising:
obtaining, by a computer processor, seismic data regarding a geological region of interest;
obtaining, by the computer processor, well log data from a wellbore within the geological region of interest; and
determining, by the computer processor, a plurality of formation top depths for a plurality of formations using the seismic data, the well log data, a stratigraphic column, and a machine-learning model,
wherein the stratigraphic column describes an order of the plurality of formations within the geological region of interest, and
wherein the machine-learning model assigns one or more features among the seismic data and the well log data to a formation among the plurality of formations in the stratigraphic column to determine the plurality of formation top depths;
determining, by the computer processor, a thickness of a respective formation among the plurality of formations using consecutive formation top depths among the plurality of formation top depths; and
determining, by the computer processor, whether a respective formation top depth among the plurality of formation top depths is invalid due to the respective formation being eroded,
wherein the respective formation top is determined to be invalid in response to the thickness of the respective formation being less than a predetermined erosion threshold.