Data indexes and enrichment
Depending on the context, some metadata is added to the normalized events, as shown below.
Time-based sources
If the data is received from a source that provides the original date of each measurement, such as time-based WITSML logs, OPC or WITS, the fields index_timestamp and adjusted_index_timestamp will be added to each event.
The field adjusted_index_timestamp should be used by default to plot data from those sources.
For time-based WITSML logs, the value index_type will be date time.
timestamp
is added by Live itself on every event, at the moment the event is received by Live.
liverig__index__timestamp
is the value for the index curve (indexCurve) when it’s a date time curve (when it’s a depth curve, the value is instead at liverig__index).
liverig__metadata->timestamp_adjustment
is not a timestamp, it’s a calculated adjustment which should be added to the source timestamp (liverig__index__timestamp) to correct for clock errors at the source.
liverig__metadata->capture_timestamp
is when the collector received the data from the source.
liverig__metadata->capture_start_timestamp
is when the collector requested the data from the source.
liverig__metadata->remoteTimestamp
is the clock in the collector when it sent the packet with the data to Live.
liverig__metadata->localTimestamp
is the clock in Live when it received the packet with the data from the collector.
Depth-based sources
If the data is received from depth-based sources, such as a depth-based WITSML log, then the fields depth_value, depth_uom (both relate to the normalized depth), index_uom, index_value, and index_mnemonic will be added to each event.
The field depth_value should be used by default to plot data from those sources.
In the WITSML case, the value of index_type will be either measured depth or vertical depth.
The unit of measurement used for the depth values can be configured on the Additional Features area, as the image below shows. This configuration affects the index_value, which is the value received from the data sources, and the depth_value, which is the value enriched by Intelie Live based on the Depth channel configuration.
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