Digital Energy Journal- Spectraseis launches borehole tool

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Spectraseis launches borehole tool

Monday, June 21, 2010

Spectraseis has launched a new borehole receiver array for low frequency and microseismic measurements.

The new 4.4” OD (outside diameter) tool, which features six levels of high-sensitivity active receivers, has been designed for multiple downhole applications, including LF seismic surveys and microseismic monitoring projects.

It is designed to be safely deployed and recovered on a tubing string in casing as small as 5.5” OD and in wells with temperatures of up to 160 degrees Fahrenheit (70 degrees Celsius).

Scheduled for delivery in October 2010, the tool has been developed by Spectraseis through the integration of a group of scientists and specialist engineering firms. The first deployment is planned shortly afterwards

The instrument includes the following features:

- Broadband recording. The tool acquires three-component broadband measurements from 0.1 to 1000 Hz, allowing for both low frequency and microseismic applications.

- High-sensitivity receivers. Active geophones capable of recording wavefields to -190 dB are used in a multi-component configuration to fully sample weak, ambient or induced seismic activity.

- Multi-level array. The receiver array has six independent levels to facilitate source localization and directional analysis with adjustable vertical configurations.

- Deployable in deviated wells. A specially-designed gimbaling mechanism allows for accurate measurements in boreholes which are deviated up to 24 degrees.

- Safe deployment. A high degree of deployment confidence is a key design feature. The tool is fully self-contained and operates autonomously, with no cables running to the surface. All data is recorded and digitized downhole, using onboard power sufficient for up to eight days of deployment.

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