Oilfield Data Analysis
Most assets have in place information systems that collect and store large amounts
of oilfield operating data relating to production from individual wells such
as hydrocarbon and water flow rates, measurements from plant instrumentation
and well test results. In brownfields the data typically stretches back over
many years of operation and represents a huge repository of asset operating
experience but it many sites it is a relatively under utilised resource.
KPS can help you unlock the value in this data with the Oilfield
Data Analyser and its unique Event Associations technology. Our product rapidly analyses
historic reservoir production and measurement data and automatically derives
well to well interaction patterns such as the level of injector support for
producer wells identifying for example those injectors not contributing towards
production or production wells cycling injected water.
Event Association Technology
Event Associations provide a way of systematically analysing many thousands
of records of data and automatically discovering patterns and relationships
between variables. The first step in applying the technology is to define events
of interest in the production data, such as sustained changes in production
rate from a well or a sustained increase or reduction in water injection.
Event Associations then quantifies the amount of time that one event occurs
in relation to another. For example we may identify that 80% of the time that
the water injection rate into an injector well is decreasing then the production
rate from a neighbouring well is also decreasing. Furthermore we can also identify
the time delay between the two events occurring, so in the previous example
it maybe that the decrease in production rate occurs on average 8 weeks after
the decrease in water injection rate.
Advantages
Some type of analysis of production data may already be carried out manually
by an asset engineer but typically on an ad hoc basis. Event Associations provides
a rapid and cost effective approach to analysing all available data that may
stretch over many years to identify potential interactions between wells.
Results
The results are independent of any simulation model of the reservoir and through
further understanding of interactions between wells can help you increase production
and reduce injection costs through more effective water injection and maintenance
of existing wells. The approach is of benefit to fields where the impact of
water injection is not well understood or there are issues with the existing
reservoir model. We have achieved successful results applying the technology
to both daily production data for wells with gas lift and wells with more extensive
downhole instrumentation and ESP pumps.
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