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Ecrin v4.12 - Doc v4.12.02 - © KAPPA 1988-2009
Diamant Guided Session #1
•
DmtGS01 - 3/18
B01.3 • Wavelet filtering
Permanent gauge data can contain pressure, temperature and rate history over large
production time periods; accidental or planned shut-ins become ‘free’ transient tests that may
be analyzed in Saphir. Whereas combined pressures and rates allow for advanced production
analysis in Topaze. The problem is that with current downhole and surface acquisition the
amount of raw data is vast. Simple filtering will exclude significant changes in the signature of
the data while using all data will saturate the CPU and the memory of any application. Diamant
smart wavelet filtration can reduce the data volume by several orders of magnitude without
missing significant events such as choke (rate) changes and shut-ins.
B01.4 • Versatile data management
Even the most rigorous engineer ends up fighting with directories and obscure file names.
Diamant mirrors the loaded production data structure on the engineer screen in a clear and
interactive data browser (see Figure B01.2).
A Diamant document represents a Field with its associated data, files, and analyses. Wells can
be gathered in groups. At the Field level, technical objects such as a 2D Map, PVT, or Kr
models can be created. Production of individual wells, groups of wells, or the entire field can be
readily plotted or viewed as tables (see Diamant Display section below). For nodes that
correspond to files created by other program (typically 'Associated files'), a double click
launches the corresponding application and opens the file.
The tree structure opposite shows a typical data hierarchy as
seen within Diamant. Nodes in the tree can be viewed in 4
different display modes when applicable:
View List
View Information
View Plot
View Tables
The
List mode
is for nodes such as associated files folders;
plots etc, and provides a view of their contents.
The
Info mode
typically gives a summary of the properties
for the various elements or nodes.
The
Plot mode
, relevant for rate data or any other data
loaded for a particular well, displays a plot with that data
alone if the active node is single value or multiple plots if the
active node contains more than one value.
The plot is the basis for editing, the partial reload option and
this mode is also used to view associated picture files.
Finally, in
Table mode
, the actual data or production values
are displayed in tabular form. The display time step can be
customized.
Fig B01.2 • Data browser