Reservoir evaluation apparatus and method
First Claim
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1. A seismic data acquisition apparatus for sensing acoustic energy in a formation, comprising:
- a) a plurality of sensors disposed in a well borehole drilled in the formation for detecting the acoustic energy, each sensor including at least one forced balanced feedback controlled accelerometer for providing a sensor output indicative of the acoustic energy at the sensor location.
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Abstract
The present invention provides a vertical seismic imaging apparatus and method for evaluation a reservoir. The invention includes a plurality of sensors disposed in a well borehole either permanently cemented in place or retrievably disposed using a series of clamps to attach the sensors to the borehole wall. Each sensor uses one or more forced balanced controlled accelerometers to detect acoustic energy in the formation.
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Citations
56 Claims
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1. A seismic data acquisition apparatus for sensing acoustic energy in a formation, comprising:
a) a plurality of sensors disposed in a well borehole drilled in the formation for detecting the acoustic energy, each sensor including at least one forced balanced feedback controlled accelerometer for providing a sensor output indicative of the acoustic energy at the sensor location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A formation vertical seismic profiling system, comprising:
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a) a plurality of sensors disposed in a well borehole drilled in the formation for detecting acoustic energy, each sensor including at least one forced balanced feedback controlled accelerometer for providing a sensor output indicative of the acoustic energy at the sensor location; and
b) a first controller coupled to the plurality of sensors for determining the parameter of interest using the sensor output of one or more of the plurality of sensors. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A method of sensing acoustic energy in a formation, comprising:
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a) disposing a plurality of sensors in a well borehole drilled into the formation each sensor including at least one force balanced feedback controlled accelerometer; and
b) sensing the acoustic energy within the formation using the plurality of sensors.; and
d) determining a parameter of interest using a controller coupled to the plurality of sensors, the parameter of interest being determined at least in part on the sensed acoustic energy. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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Specification