公开(公告)号：US20190113642A1

公开(公告)日：2019-04-18

申请号：US16000471

申请日：2018-06-05

Applicant: SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Xiaofei CHEN ,  Zhentao YANG ,  Jiannan WANG

IPC: G01V1/30 ,  G01V1/28 ,  G01V1/24

CPC classification number: G01V1/306 ,  G01V1/247 ,  G01V1/282 ,  G01V1/284 ,  G01V1/307

Abstract: The technical solution of the present application is applicable to the technical field of geophysical exploration, and provides a surface wave prospecting method and an acquisition equipment. This method comprises: obtaining vibration data by a vibration collecting device; calculating a dispersion graph by applying a vector wavenumber transform method to the vibration data, extracting dispersion curves from the dispersion graph, wherein the dispersion curves include fundamental mode and higher modes of dispersion curves of surface wave; establishing an initial stratigraphic model according to the dispersion graph; and performing a dispersion curves inversion based on the initial stratigraphic model and an inversion algorithm. The present technical solution can extract dispersion information of higher modes of surface wave from vibration data for reducing the non-uniqueness of inversion; computation time of the inversion algorithm can be reduced by establishing the initial stratigraphic model, and the instability of the inversion algorithm can be reduced, too. In this way, vibration collecting devices can be arranged arbitrarily, the requirement for the site layout is reduced, and the adaptability of surface wave prospecting is improved.

公开(公告)号：US20220350046A1

公开(公告)日：2022-11-03

申请号：US17420928

申请日：2020-03-04

Applicant: SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Hengxin REN ,  Zhentao YANG ,  Xiaofei CHEN ,  Shichuan YUAN ,  Xuzhen ZHENG ,  Zhanxiang HE

IPC: G01V11/00 ,  G01V3/12 ,  G01V1/28

Abstract: A surface wave prospecting method for jointly extracting Rayleigh wave frequency dispersion characteristics in a seismoelectric field. A surface wave prospecting method includes following steps of: acquiring jointly acquired data, where the jointly acquired data includes seismic wave data and electric field data; carrying out jointly imaging processing on jointly acquired data to obtain a superposed frequency dispersion spectrum; carrying out extraction processing on superposed frequency dispersion spectrum to obtain a frequency dispersion curve, outperforming inversion processing on frequency dispersion curve to obtain a stratum structure profile. As seismic wave data and electric field data are adopted to carry out combined imaging processing to obtain superposed frequency dispersion spectrum, multi-mode frequency dispersion curve is extracted, multiplicity of solutions of inversion is greatly reduced during inversion, precision and stability of surface wave prospecting are greatly improved.

公开(公告)号：US20210141113A1

公开(公告)日：2021-05-13

申请号：US17051247

申请日：2018-08-06

Applicant: SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Zhentao YANG ,  Xiaofei CHEN ,  Jiannan WANG ,  Lei PAN

IPC: G01V1/34 ,  G01V1/30 ,  G01V1/28 ,  G01V1/32

Abstract: Active source surface wave prospecting method which is applicable to technical field of geological prospecting, comprising: collecting, by detector at preset station, surface wave data transmitted from seismic source; calculating to obtain dispersion energy graph on basis of vector wave-number transformational algorithm and according to surface wave data; extracting dispersion curve from dispersion energy graph, dispersion comprising base-order surface wave dispersion curve and high-order surface wave dispersion curve; establishing initial stratigraphic model according to base-order surface wave dispersion curve and high-order surface wave dispersion curve, performing, according to initial stratigraphic model, joint inversion on base-order surface wave dispersion curve and high-order surface wave dispersion curve to obtain inverting data of stratigraphic texture. Accuracy of surface wave prospecting result is effectively improved. Further provided are surface wave exploration device and terminal device.

公开(公告)号：US20190085684A1

公开(公告)日：2019-03-21

申请号：US15970490

申请日：2018-05-03

Applicant: SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Xinding FANG ,  Jianxia XU ,  Zhentao YANG

IPC: E21B47/09 ,  E21B47/08 ,  G01V1/52 ,  G06F17/18 ,  G06F17/11

Abstract: A method, device, terminal and computer readable storage medium for determining a cross-sectional shape of a borehole involves obtaining a plurality of logging data items as measured at a same depth of a well via a multi-arm caliper. The logging data items include pad coordinates which use a center of the multi-arm caliper as a reference point. Coordinates of a borehole center and a borehole radius at the depth of the well are obtained by using a least squares objective function with a constraint condition and according to the pad coordinates. The constraint condition is that a distance from a pad of a caliper tool to the borehole center is larger than or equal to the borehole radius. The pad positions are located outside a circle or on the circle obtained by fitting according to the least squares objective function, such that a real borehole cross-sectional shape is obtained. Measuring errors of well logging are reduced, and the reliability of the measurement of the borehole cross-sectional shape is improved.