Title:
METHOD AND APPARATUS FOR EXTRACTING DOWNGOING WAVELET AND ATTENUATION PARAMETERS BY USING VERTICAL SEISMIC DATA
Document Type and Number:
WIPO Patent Application WO/2021/147841
Kind Code:
A1
Abstract:
A method for extracting a downgoing wavelet and attenuation parameters by using vertical seismic data, comprising: performing upgoing and downgoing wave separation processing on vertical seismic wave field data to obtain downgoing longitudinal wave data; performing a Fourier transform on seismic trace data having a first arrival time window length being a set value in the downgoing longitudinal wave data, and obtaining downgoing longitudinal wave data having experienced the Fourier transform and a multi-trace downgoing longitudinal wave logarithmic spectrum; removing a downgoing wavelet logarithmic spectrum from the multi-trace downgoing longitudinal wave logarithmic spectrum, to obtain a downgoing longitudinal wave logarithmic spectrum having experienced multi-trace wavelet correction; performing, according to parameter data of the downgoing longitudinal wave logarithmic spectrum having experienced multi-trace wavelet correction, correction and an inverse Fourier transform on the downgoing longitudinal wave data having experienced the Fourier transform to obtain a downgoing wavelet; and obtaining attenuation parameters according to a longitudinal wave first arrival time and the parameter data of the downgoing longitudinal wave logarithmic spectrum having experienced multi-trace wavelet correction. The method has high accuracy in extracting a downgoing wavelet and attenuation parameters. Also provided are an apparatus for extracting a downgoing wavelet and attenuation parameters by using vertical seismic data, a computer device, and a computer readable storage medium.
Inventors:
LI YANPENG (CN)
WANG JING (CN)
WANG JING (CN)
Application Number:
PCT/CN2021/072636
Publication Date:
July 29, 2021
Filing Date:
January 19, 2021
Export Citation:
Assignee:
CHINA NAT PETROLEUM CORP (CN)
BGP INC CHINA NAT PET CORP (CN)
BGP INC CHINA NAT PET CORP (CN)
International Classes:
G01V1/40; G01V1/48
Domestic Patent References:
| WO2016039928A1 | 2016-03-17 | |||
| WO2014191427A2 | 2014-12-04 |
Foreign References:
| CN103376464A | 2013-10-30 | |||
| CN109669212A | 2019-04-23 | |||
| CN104375188A | 2015-02-25 | |||
| CN104502965A | 2015-04-08 | |||
| CN104570108A | 2015-04-29 | |||
| US20060265132A1 | 2006-11-23 |
Other References:
LI YANG-PENG （, YI WEIQI, ZENG ZHONG, CHEN YUANZHONG, CAI ZHIDONG: "New Processing Approaches of VSP Data", SHIYOU DILI WULI KANTAN / OIL GEOPHYSICAL PROSPECTING, NENGYUAN BU, DILI WULI KANTAN JU, CN, vol. 53, no. S2, 30 December 2018 (2018-12-30), CN, pages 42 - 9, XP055832521, ISSN: 1000-7210
See also references of EP 4095566A4
See also references of EP 4095566A4
Attorney, Agent or Firm:
BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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