NEW in 5.41

In consolidations, there is a new option from the calculate menu called "Outcome distributions". For each outcome in a consolidation the chance of that outcome, and the P90, P50, P10 and mean volumes are written to a csv file which can be readily loaded up in a spreadsheet (and directly from the program). You can only run this calculation when all the consolidation inputs are prospects.

There is a new resource play module, released as beta in 5.41. We'd be grateful for any and all feedback.

The beta distribution now has an extra parameter λ (lambda). This controls the sharpness of the distribution. To change λ, click the "Style button next to the shape entry on the input variable dialog, or the "More.." button in the PDF calculator dialogs. Increasing λ will sharpen up the distribution, decreasing it will make it ever more stodgy. See beta distribution.

The file database admin tool (Main window, "File | File database admin") now allows you to identify likely duplicates, by showing them in green in the list. It will also identify files that cannot be read, and show them in red.

In prospect models, the model chance can now itself be a probability distribution. See Prospect models

Plotting the actual data points used in a prospect calculation has been revised, and now incorporates the results as well as the input variables. See Data points. You can also write all the iteration data (input and results) to a csv file, and mess about with it in a spreadsheet.

Fluid correlations and unit conversions have been moved to a new menu item called "Tools" on main REP window. Two new facilities are available here

Calculator is a tool where you enter your own probability distributions and equations, and make a MC calculation. You can duplicate many of the standard REP calculations, though of course you do not have access to the fancy stuff like area-depth and Sw-height.

PDF fit fits normal, lognormal and beta distributions to data. These data can be anything, and are loaded most conveniently from the clipboard, though you can also read them direct from an XL spreadsheet or csv file.


When you are linked to a database, the key entries in prospect identification (e.g. basin and play) are optionally drop-down (ico-hotdrop) lists where the lists are constructed from the database. It is not necessary to choose an item from the list, but can make it easier when you come to submit your prospect to the database.


In production profiles, a limiting decline rate has been added to the hyperbolic decline function. This is useful for shale gas and other tight reservoir forecasts.


In fluid correlations you can know calculate total sorbed gas content from a Langmuir isotherm.



CO2 sequestration estimates can now be made.

You can now keep sets of prospects and consolidations in projects.

In Setup - user options you can choose always to load the last file or last project when you start the program.


In Prospects:

You can plot input variable distributions for multiple prospects, models and layers. See Input data plots.

You can "freeze" an existing evaluation, and start a new one from the same data. This enables you to see how it evolves with time, and you can plot pre- vs. post drill (or any other combination of evaluations) for one or more prospects. See Prospect evolution.

In gas condensate reservoirs, you can now calculate condensate recovery using a distribution for initial condensate yield and a liquids recovery factor. This is an alternative to using field average condensate yield with a single value for initial condensate yield. See Gas Condensate Reservoirs.

The model entry dialog is revised, and comes with a decision tree. Note, in particular, that you can make a model hierarchy.

There is a new risk table, so that you can summarise and edit the risking for multiple prospects.

There is a new template builder for single line prospect export to XL (for prospect inventories).

Net pay thickness maps can now be digitised and used for GRV calculations.

You can make a consolidation of the current loaded prospects.


In Consolidations:

The consolidation input screen is redesigned.

You can show a consolidation as a decision tree. If the prospects being consolidated have production forecasts, you can use the decision tree to show consolidated forecasts for individual outcomes.

On the File | Recent files menu of the main window there is an option Recent file list. This produces a list of all the most recently used files sorted by type (prospect, consolidation etc.). Double click a file name to load it.

There is a new (and dangerous) option to calculate a consolidation setting all underlying prospect risks to 100%. Make sure your CV is up to date before doing so.



Saturation-height functions can now be applied by layer; previously you could only define one function for all layers. The entry dialog has also been slightly modified, so that the table and plot always reflects the current function.

Also in Sw-height, there is a new equation: Sw = a + b.log(h) + c.log(h)^2 + d.log(h)^3} / phi^e


You can now make realizations (scenarios) of the P90, P50, P10 and mean reserve cases.

An new type of dependency ("relational") is introduced.

You can choose not to display recoverable volumes on the printed output.


Date: 20/03/2015