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US 2019/0056523 A1Published application
Electro acoustic technology seismic detection system with down-hole source
AssigneeHalliburton Energy Services, Inc.
InventorsMikko Jaaskelainen, Brian V. Park, Norman R. Warpinski
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Abstract
A device is described for downhole seismic sensing utilizing electro acoustic technology in conjunction with moveable downhole seismic sources.
Claims28
A system for downhole seismic sensing comprising:
- a. multiple electro acoustic technology seismic sensors attached to the outside of downhole casings;
- b. one or more fiber optic sensing cables installed on the outside of the downhole casings and in close proximity with the multiple electro acoustic technology seismic sensors;
- c. one or more surface fiber optic interrogators to detect acoustic signals acting on the fiber optic sensing cables;
- d. a movable seismic source that to move down the interior of the downhole casings and to pull back while periodically emitting seismic source signals;
- and
- e. a source of electrical power to the multiple electro acoustic technology seismic sensors.
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A method for downhole seismic sensing comprising:
- a. providing multiple electro acoustic technology seismic sensors attached to the outside of one or more downhole casings;
- b. providing a source of electric power to the multiple electro acoustic technology seismic sensors;
- c. providing one or more fiber optic sensing cables installed on the outside of the one or more downhole casings and in close proximity with the multiple electro acoustic technology seismic sensors;
- d. providing a surface fiber optic interrogator for detecting acoustic signals acting on the fiber optic sensing cables;
- e. providing a movable seismic source that is to move down the interior of at least one of the downhole casings and to pull back while periodically emitting seismic source signals;
- and
- f. converting the detected acoustic signals to seismic signals.
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Dependencies are inferred from the claim text.