Westerngeco L.l.p.

Westerngeco Seismic Holdings Limited

Daniel H Golparian

Kambiz Iranpour

Simon Barakat

Truls Arnegaard

Brian Lee Virgin

Ove Brynestad

Systems and methods for asynchronously acquiring seismic data are described, one system comprising one or more seismic sources, a plurality of sensor modules each comprising a seismic sensor, an A/D converter for generating digitized seismic data, a digital signal processor (DSP), and a sensor module clock; a seismic data recording station; and a seismic data transmission sub-system comprising a high precision clock, the sub-system allowing transmission of at least some of the digitized seismic data to the recording station, wherein each sensor module is configured to periodically receive from the sub-system an amount of the drift of its clock relative to the high precision clock. This abstract is provided to comply with rules requiring an abstract to ascertain the subject matter of the disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

Systems and methods for seismic data acquisition employing asynchronous, decoupled data sampling and transmission

A survey system for acquiring survey data representative of a subterranean structure includes a plurality of sensor modules. Each of at least some of the plurality of sensor modules includes a wireless transceiver to communicate wireless signals with another component in the survey system, and a plurality of parts. A first of the plurality of parts is detachably attached to a second of the plurality of parts, with the first part including a sensor, and the second part including a power source and a non-volatile storage.

Sensor module having multiple parts for use in a wireless survey data acquisition system

To test at least one unit of a subterranean survey system, the unit detects presence of wireless signaling of a mobile device. After the detecting, a wireless connection is established between the unit and the mobile device. A test at the unit is performed in response to a test command from the mobile device.

Wirelessly activating a unit of a subterranean survey system for testing

To control activation of one or more communication units in a survey system that performs surveying of a subterranean structure, optical activity on at least one optical link connected to at least one communication unit that is part of a survey system is detected. In response to determining that the optical activity has a characteristic that satisfies a predetermined criterion, the at least one communication unit is awakened.

Optical activation of one or more communication units in a survey system

A method and apparatus implementing a network infrastructure in a seismic acquisition system are disclosed. The apparatus is a seismic acquisition system, comprising a plurality of seismic data sources () capable of generating data; at least one data collection system () utilizing an open network protocol; and at least one line network () connecting the data sources to the data collection system and utilizing an open network protocol. The line network () includes a plurality of data source nodes () at which a portion of the plurality of seismic data sources are respectively attached to the line network; and a router () for routing data generated by the seismic data sources () to the data collection system () through the data source nodes () in accordance with the open network protocol. The method comprises assigning at least two respective network addresses to each one of a plurality of seismic data sources, a plurality of data source nodes, a plurality of routers, and a data collection system; routing data generated by the data sources through the data source nodes and the routers to the data collection system; correlating the network addresses of the seismic data sources to the physical location of the respective seismic data sources; and correlating the physical locations of the respective seismic data sources to the data generated by the respective seismic data sources.

Implementing a network infrastructure in a seismic acquisition system

A method and apparatus for synchronizing a real time clock of a slave computer with a real time clock of a master computer. The method includes the steps of: calculating a first time drift value between the real time clock of the slave computer and the real time clock of the master computer, calculating a second time drift value between the real time clock of the slave computer and the real time clock of the master computer, calculating an average time drift value between the real time clock of the slave computer and the real time clock of the master computer using the first time drift value and the second time drift value, and adjusting the real time clock of the slave computer using the average time drift value.

Hardware-based network packet timestamps: improved network clock synchronization

Systems and methods for asynchronously acquiring seismic data are described, one system comprising one or more seismic sources, a plurality of sensor modules each comprising a seismic sensor, an A/D converter for generating digitized seismic data, a digital signal processor (DSP), and a sensor module clock; a seismic data recording station; and a seismic data transmission sub-system comprising a high precision clock, the sub-system allowing transmission of at least some of the digitized seismic data to the recording station, wherein each sensor module is configured to periodically receive from the sub-system an amount of the drift of its clock relative to the high precision clock.

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Oslo, Norway

Daniel H Golparian