Method for swell effect and mis-tie correction in high-resolution seismic data using multi-beam echo sounder data

Patent metadata

Field	Value
Publication number	US-9810801-B2
Application number	US-201514963929-A
Country	US
Kind code	B2
Filing date	Dec 9, 2015
Priority date	Apr 7, 2015
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

Provided is a method for swell effect and mis-tie correction in high-resolution marine seismic data using multi-beam echo sounder data, and more particularly, a method for swell effect and mis-tie correction in high-resolution marine seismic data using multi-beam echo sounder data capable of acquiring the high-resolution marine seismic data having the swell effect and the mis-tie effectively corrected by using the multi-beam echo sounder data including water depth data of a sea-bottom having high precision.

First claim

What is claimed is:

1. A method for correcting a swell effect and a mis-tie at the intersection point of marine seismic data using multi-beam echo sounder data measured by a multi-beam sounder, the method comprising:
receiving the multi-beam echo sounder data;
extracting water depth values corresponding to positions having latitude and longitude coordinate points same as shot points at the marine seismic data in the multi-beam echo sounder data;
correcting the swell effect and the mis-tie at the coordinate points of the marine seismic data by reflecting the water depth values; and
deriving the marine seismic data at which the swell effect and the mis-tie are corrected by performing the extracting and the correcting on all coordinate points at the marine seismic data.

2. The method of claim 1 , wherein the correcting the swell effect and the mis-tie comprises:
calculating a first sea-bottom two-way travel time to which the water depth value is reflected by converting the water depth value into a two-way travel time using a vertical sound velocity of a sea water measured upon acquiring the multi-beam echo sounder data;
extracting a second sea-bottom two-way travel time corresponding to a coordinate point in the marine seismic data; and
correcting the swell effect and the mis-tie at the coordinate point of the marine seismic data by comparing the first sea-bottom two-way travel time with the second sea-bottom two-way travel time.

3. The method of claim 2 , wherein the correcting the swell effect and the mis-tie at the coordinate point of the marine seismic data by comparing the first sea-bottom two-way travel time with the second sea-bottom two-way travel time comprises:
calculating a difference value between the first sea-bottom two-way travel time to which the water depth value is reflected and the second sea-bottom two-way travel time; and
correcting the swell effect and the mis-tie by applying the difference value to the entire two-way travel time at the coordinate point of the marine seismic data.

4. A non-transitory computer readable recording medium storing a program for implementing a method for correcting a swell effect and a mis-tie at the intersection point of marine seismic data using multi-beam echo sounder data measured by a multi-beam sounder, the method comprising:
receiving the multi-beam echo sounder data;
extracting water depth values corresponding to positions having latitude and longitude coordinate points same as shot points at the marine seismic data in the multi-beam echo sounder data:
correcting the swell effect and the mis-tie at the coordinate points of the marine seismic data by reflecting the water depth values; and
deriving the marine seismic data at which the swell effect and the mis-tie are corrected by performing the extracting and the correcting on all coordinate points at the marine seismic data.

5. The non-transitory computer readable recording medium of claim 4 , wherein the correcting the swell effect and the mis-tie comprises:
calculating a first sea-bottom two-way travel time to which the water depth value is reflected by converting the water depth value into a two-way travel time using a vertical sound velocity of a sea water measured upon acquiring the multi-beam echo sounder data;
extracting a second sea-bottom two-way travel time corresponding to a coordinate point in the marine seismic data; and
correcting the swell effect and the mis-tie at the coordinate point of the marine seismic data by comparing the first sea-bottom two-way travel time with the second sea-bottom two-way travel time.

6. The non-transitory computer readable recording medium of claim 5 , wherein the correcting the swell effect and the mis-tie at the coordinate point of the marine seismic data by comparing the first sea-bottom two-way travel time with the second sea-bottom two-way travel time comprises:
calculating a difference value between the first sea-bottom two-way travel time to which the water depth value is reflected and the second sea-bottom two-way travel time; and
correcting the swell effect and the mis-tie by applying the difference value to the entire two-way travel time at the coordinate point of the marine seismic data.

Assignees

• Korea Inst Geoscience & Mineral Resources

Inventors

• Kim Young-Jun
• Koo Nam Hyung
• Kim Won-Sik
• Chun Jong-Hwa

Classifications

• G01V1/28 Primary

  Processing seismic data, e.g. for interpretation or for event detection (G01V1/48 takes precedence) · CPC title

• G01V1/362 Primary

  Effecting static or dynamic corrections; Stacking · CPC title

• G01V1/3808

  Seismic data acquisition, e.g. survey design · CPC title

• G01V2210/532

  Dynamic changes in statics, e.g. sea waves or tidal influences · CPC title

• G01V1/301

  for determining seismic cross-sections or geostructures · CPC title