US 12,287,449 B2
Three-dimensional imaging method and system for surface comprehensive geophysical prospecting
Shucai Li, Jinan (CN); Yiguo Xue, Jinan (CN); Maoxin Su, Jinan (CN); Chunjin Lin, Jinan (CN); Li Guan, Jinan (CN); Daohong Qiu, Jinan (CN); Zhiqiang Li, Jinan (CN); Yimin Liu, Jinan (CN); Peng Wang, Jinan (CN); and Huimin Gong, Jinan (CN)
Assigned to SHANDONG UNIVERSITY, Jinan (CN)
Appl. No. 17/779,816
Filed by SHANDONG UNIVERSITY, Shandong (CN)
PCT Filed Jun. 16, 2021, PCT No. PCT/CN2021/100370
§ 371(c)(1), (2) Date May 25, 2022,
PCT Pub. No. WO2021/254394, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 202010557781.X (CN), filed on Jun. 18, 2020.
Prior Publication US 2023/0003917 A1, Jan. 5, 2023
Int. Cl. G01V 3/20 (2006.01); G01V 8/02 (2006.01)
CPC G01V 8/02 (2013.01) 7 Claims
OG exemplary drawing
 
1. A three-dimensional imaging method for surface comprehensive geophysical prospecting, comprising:
acquiring detection data of a plurality of two-dimensional profiles of a surface detection site;
forming two-dimensional profile resistivity data by geophysical inversion of the detection data;
performing three-dimensional coordinate conversion on the two-dimensional profile resistivity data to obtain resistivity data of a three-dimensional coordinate system; and
converting the resistivity data of the three-dimensional coordinate system into a three-dimensional model by using a Kriging interpolation method;
wherein, a process of converting the resistivity data of the three-dimensional coordinate system into the three-dimensional model, comprises:
determining an origin and establishing a three-dimensional coordinate axis;
obtaining position coordinates of a measuring line and a position of a two-dimensional profile resistivity data point on a measuring line plane; and
obtaining three-dimensional coordinates of the two-dimensional profile resistivity data point by a three-dimensional coordinate conversion formula; wherein, the three-dimensional coordinate conversion formula is:

OG Complex Work Unit Math
wherein X, Y and Z are final three-dimensional coordinates with O as an origin, X1 is a horizontal distance from a starting point of the measuring line to the origin of coordinates, Y1 is a longitudinal buried depth from the starting point of the measuring line to the origin of coordinates, Z1 is a vertical height from the starting point of the measuring line to the origin of coordinates, X′ is a horizontal length of an original data point, Y′ is a detection depth of the original data point, Z′ has an initial value of 0, R1 is a position matrix, and R2 is a data point matrix.