This post is also available in: Spanish
Capture valuable workflows
All of the Petrosys gridding, contouring and volumetrics functions are wrapped into an effective workflow manager. This tracks the steps you take in such a way that you can tailor your workflow, repeat it with alternate data, create a record of the process and turn a sophisticated sequence of routine computations into a reliable routine task. For instance, you might want to develop a workflow that requires a complex sequence of steps to produce a small number of outputs – perhaps just a top, base and thickness grid – from a number of inputs where one or more of the inputs is being edited externally. You can easily create a workflow task that helps you reapply a processing sequence to quickly see the net effect on the output as the input data is being changed in the external source.
Validate your results
Perhaps you’re starting with an interpreted time surface in SeisWorks and picked tops in OpenWorks. Your workflow might be the creation of top and base surfaces to the reservoir by gridding the time surface; depth converting to min/most-likely/max scenarios using three different velocity models; adjusting the six (top/base for min/likely/max) grids to the reservoir picks on the wells; truncating the three reservoir picks to an accepted basement depth model; computing the thickness grids; calculating the three volume estimates; and calculating a range of difference grids to illustrate the range of error in the scenarios relative to one another. This entire workflow might take only a minute to run, but you want to run it every 20 minutes as your SeisWorks interpretation changes. With Petrosys workflows, this is easy: just click ‘Rerun Workflow’ to run the whole sequence again, as many times as you like.
Workflow reporting, capture and auditing are critical to the effective management of the surface modeling and volume estimation process.
Test all geological possibilities
In EP, you need to consider geological scenarios by running modeling calculations with a range of values for one or more parameters. For example, you might be doing a depth map in which you want to assess the impact of different smoothing parameters and grid-cell sizes on the volume of a structure. The key is creating multiple scenarios, which can be interpreted using different parameters. After you’ve built your standard workflow, simply use a ‘Workflow Parameters’ option to identify those parameters you’d like to change and set them to be presented interactively when the workflow is run. You can add a workflow step that allows the user to enter remarks and capture metadata about the process interactively.
Create an auditable process
The grid header includes much of the metadata information needed to work out who, why, where, when and from what a grid was computed. Since all of the workflow logic, input sources and much of the output are recorded in XML files, it’s possible to use the workflow input and XML logging output to create an audit trail of your computations. In this way, the total control environment associated with the work can be recorded in an open format that ensures long-term accessibility. The XML output lends itself to further processing in company-specific knowledge management or other document automation systems. In addition, Petrosys provides workflow reports that output this information in easily readable HTML (web) formatted pages.
The ultimate proof of performance: legitimate, definitive volumes
A true mapping guru is a master of volumetrics, able to turn interpreted geological surfaces and reservoir characteristics into quantifiable estimates of potential petroleum reserves. Petrosys puts specialized resources at your service so you can calculate volumes in a variety of ways; for example, from a depth grid representing top structure, or from a pair of grids specifying the top and base of a reservoir, or from a net pay grid. In the critical review process, slice volume charting and in-depth reporting make it easier for management and geoscientists to apply their knowledge of reservoir geometries to better understand the predicted volumes, and to move forward with confidence.