Method and installation for monitoring microseismic events
OwnerRobert Hughes Jones, Ian S. Brown +1inventors
InventorsRobert Hughes Jones, Ian S. Brown, Andrew John Jupe
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Abstract
A method of monitoring microseismic events in a hydrocarbon production reservoir provided with a well comprising inner production tubing and an outer casing. The method includes providing one or more microseismic sensors in contact with the outer casing of the well, and taking steps to enhance the ability of the microseismic sensors to detect microseismic signals over the background noise generated by fluid flow inside the inner production tubing is enhanced. An installation suitable for carrying out such a method is also disclosed.
Claims10
A method of monitoring microseismic events in a hydrocarbon production reservoir provided with a well comprising inner production tubing and an outer casing, said method comprising the steps of:
- a) providing two or more microseismic sensors adjacent the outer casing;
- and
- b) processing an output of the microseismic sensors in order to provide the microseismic sensors with a directional response comprising a reduced sensitivity to noise coming from a direction of the inner production tubing, such that an ability of the microseismic sensors to detect microseismic signals over a background noise generated by fluid flow inside the inner production tubing is enhanced.
A method of monitoring microseismic events in a hydrocarbon production reservoir provided with a well comprising an inner production tubing and an outer casing, the method comprising the steps of:
- a) providing one or more first microseismic sensors adjacent the outer casing of the well;
- b) providing one or more second microseismic sensors between the inner production tubing and the first microseismic sensors located adjacent the outer casing;
- and
- c) processing output of the second microseismic sensors nearer the inner production tubing in conjunction with output of the first microseismic sensors adjacent the outer casing such that the ability of the first microseismic sensors to detect microseismic signals over a background noise generated by fluid flow inside the inner production tubing is enhanced.
A method of monitoring microseismic events in a hydrocarbon production reservoir provided with a well comprising an inner production tubing and an outer casing, said method comprising:
- a) providing one or more microseismic sensors adjacent the outer casing;
- and
- b) providing increased sound insulation between the microseismic sensors and the inner production tubing such that an ability of the microseismic sensors to detect microseismic signals over a background noise generated by fluid flow inside the inner production tubing is enhanced.
An installation for monitoring microseismic events in a hydrocarbon production reservoir provided with a well comprising an inner production tubing and an outer casing, the installation comprising one or more first microseismic sensors adjacent the outer casing and means for processing an output of the first microseismic sensors in order to provide the first microseismic sensors with a directional response comprising a reduced sensitivity to noise coming from a direction of the inner production tubing, such that an ability of the first microseismic sensors to detect microseismic signals over a background noise generated by fluid flow inside the inner production tubing is enhanced.
Dependencies are inferred from the claim text.