SYSTEMS AND METHODS FOR MEASURING WATER PROPERTIES IN ELECTROMAGNETIC MARINE SURVEYS
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United States of America Patent
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Issued Date -
Sep 18, 2014
app pub date -
Mar 12, 2013
filing date -
Mar 12, 2013
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Abstract
Systems and methods for measuring water properties during a marine survey are disclosed. While electromagnetic-field (“EM-field”) receivers located along streamers towed by a survey vessel measure surrounding EM fields, horizontal conductivity profiles of a body of water located above a subterranean formation are also measured. By inputting a substantially continuous, conductivity profile of the body of water along with EM-field data into an EM inversion process, estimates of the subterranean formation properties, such as resistivities, can be generated with a higher degree of confidence than estimates of properties based on a speculated or sparse conductivities of the body of water.
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