Patent · US Active

Seismic measurements while drilling

US8947974B2 · kind B2 · utility

1Cited by

6References

20Claims

0Family size

Assignee

Baker Hughes Holdings LLC · US

Inventors

Radu Coman · Hannover, DE
Michael Neubert · Lakeville, US
Holger Mathiszik · Celle, DE
Michael Koppe · Erfurt, DE

Key dates

Filing date	Jun 15, 2010
Grant date	Feb 3, 2015
Priority date	—
Expiry date	Sep 13, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG01V1/42
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A downhole tool starts recording seismic energy. During the recording time, a surface seismic source is activated a specified number of times with a nominally defined separation between successive. The downhole sensor receives seismic waves resulting from the activation, but the time of the shooting sequence is not known downhole. The recorded data stream is processed and converted in real-time into seismic traces. A predefined number of traces are stacked and the quality of this sliding stack is used to detect time of the shooting sequence. The method could be used to detect one or several shooting sequences during a measurement window.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.