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Title: Method for enhancing low frequency output of impulsive type seismic energy sources and its application to a seismic energy source for use while drilling

A method for operating an impulsive type seismic energy source in a firing sequence having at least two actuations for each seismic impulse to be generated by the source. The actuations have a time delay between them related to a selected energy frequency peak of the source output. One example of the method is used for generating seismic signals in a wellbore and includes discharging electric current through a spark gap disposed in the wellbore in at least one firing sequence. The sequence includes at least two actuations of the spark gap separated by an amount of time selected to cause acoustic energy resulting from the actuations to have peak amplitude at a selected frequency.
Authors:
; ;
Publication Date:
OSTI Identifier:
1164673
Report Number(s):
8,902,712
12/337,406
DOE Contract Number:
FC26-04NT42242
Resource Type:
Patent
Resource Relation:
Patent File Date: 2008 Dec 17
Research Org:
Technology International, Inc., Kingwood, TX (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 15 GEOTHERMAL ENERGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS