US 12,481,080 B2
Method for three-dimensional velocity geological modeling with structures and velocities randomly arranged
Peng Jiang, Jinan (CN); Yuxiao Ren, Jinan (CN); Qifeng Wang, Jinan (CN); Zhiwu Zuo, Jinan (CN); Xinji Xu, Jinan (CN); Kai Wang, Jinan (CN); Lei Chen, Jinan (CN); Chuanyi Ma, Jinan (CN); Shuai Cao, Jinan (CN); Senlin Yang, Jinan (CN); Qingyang Wang, Jinan (CN); and Xianglong Meng, Jinan (CN)
Assigned to SHANDONG UNIVERSITY, Jinan (CN); and SHANDONG HI-SPEED GROUP CO., LTD., Jinan (CN)
Appl. No. 18/031,693
Filed by SHANDONG UNIVERSITY, Shandong (CN); and SHANDONG HI-SPEED GROUP CO., LTD., Shandong (CN)
PCT Filed Oct. 15, 2021, PCT No. PCT/CN2021/124210
§ 371(c)(1), (2) Date Apr. 13, 2023,
PCT Pub. No. WO2022/078514, PCT Pub. Date Apr. 21, 2022.
Claims priority of application No. 202011105341.7 (CN), filed on Oct. 15, 2020.
Prior Publication US 2023/0384470 A1, Nov. 30, 2023
Int. Cl. G01V 1/28 (2006.01)
CPC G01V 1/282 (2013.01) [G01V 2210/6222 (2013.01); G01V 2210/642 (2013.01); G01V 2210/66 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for three-dimensional velocity geological modeling with structures and velocities randomly arranged, comprising:
determining a base point in a three-dimensional space, building an equation according to the base point to determine a planar layered model, and complicating a tilt layer of the planar layered model to build a fold layer model of a curved surface in the three-dimensional space;
building a three-dimensional fault folded model based on the three-dimensional surface fold layer model combined with a fault plane of a random reference point and displacement of each point in a global coordinate system;
building a velocity model containing salt body based on the three-dimensional fault folded model, and simulating salt body intrusion in a geological body of certain depth; and
performing a random velocity amplitude to realize three-dimensional velocity modeling according to the layered type which has been set and according to the set velocity range and the velocity difference range between each layer of geology;
the complicating a tilt layer of the planar layered model specifically comprising: the planar layered model is determined by building an equation according to the base points, and the different layer models are divided into different categories; a fluctuation function is built for each point based on the plane model; by adjusting a period and amplitude of a trigonometric function in the fluctuation function, a tilt term is built for the surface, the tilt layer is further complicated, and the fold layer model of the surface in the three-dimensional space is built.