Phil’s Quarterly Update  
Q3 2009 | Volume 1, Issue 3

In This Issue
Phil’s Quarterly Update

WEM + Reservoir Simulator = Good Shale Gas History Match

Attendees Report Big Value from Training Courses

Contact Us
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Optimizing Performance is published quarterly for customers of P.E. Moseley & Associates and registered users of its software.


     
 
Two-Day WEM Training Class
Sept. 8 & 9, 2009

Where: Moseley Offices
Cost: $1,000 per person

Questions or to sign up, call or email: sales@pmoseley.com

New WEM Tip on eSupport Site: How to Add More Sensitivity Values to a Single WEM Plot
Registered WEM users: click here to login to the eSupport site and download this procedure.

 
 
 

Partnering with our Clients
Since the company began nearly 30 years ago, we've always looked at our clients as our partners. While we accept and respond to direct requests for new functionality in our software products, many ideas for new functionality arise from the work we do together with our clients—consulting and training.

In consulting projects, we typically collaborate with our clients around particularly complex problems with solutions focused on using Moseley technology. In some cases, the solutions involve us helping our clients to better understand and apply the advanced features of our products. Other cases require that we add new functionality, for example, a recent project we've been working on to model steam assisted gravity drainage (SAGD) in WEM.

Still other solutions arise from innovatively linking Moseley technology to other products, such as a shale gas study we recently completed by tying WEM to a reservoir simulator. You can read more about this in the story below.

Training classes also provide an excellent opportunity for us to collaborate and learn from our clients. The custom, in-house courses sponsored by individual companies provide the best opportunity for collaboration. Because all course attendees are from the same company, there are typically no confidentiality concerns, so the entire class can usually work openly on actual project problems.


In public classes, students can raise general issues in class about specific challenges that they face or talk with instructors offline. Hearing about these challenges directly from our users provides us with very specific input and ideas on how to continue improving our products and services.

Training courses also provide our clients the chance to better know our company and instructors, which has lead to mentoring and consulting and the extraordinary insight those opportunities bring. To hear more about what our training attendees have to say about our courses, see the story below.

Our next public WEM training course is coming up in September at our training center in Houston. Maybe we’ll see you there. For more information, email sales@pmoseley.com.




Phillip Moseley, PhD, founder and president of P.E. Moseley & Associates, Inc.

 WEM + Reservoir Simulator = Good Shale Gas History Match

We've just completed a history match study on a shale gas reservoir. As you can see from the graph in Figure 1 below, the results are quite good.













Figure 1. Results from a shale gas history match using WEM tied to a reservoir simulator.

















Figure 2. Simulation data set for shale gas study.

 

The black line shows actual pressure readings from production data and the red line our history match to the production rate. The study was done using WEM tied to a reservoir simulator using the Langmuir Correlation. For key study data, see Figure 2.

Shale gas reservoirs are complicated to model and match because they have dual porosity and permeability—from natural and hydraulic fractures and the rock matrix—as well as absorption of gas into the shale itself. In this study, we were able to model all three factors (deriving the sorption curve from Langmuir’s Correlation).

In Figure 1, which is flowing bottom hole pressure (FBHP) vs. time, the first 15 days show gas flowing from the natural fractures. Then in the late time (after 15 days) the slope begins to decline, indicating the flow is coming from the shale matrix. The spike in the graph is a build up from a shut in. When the well is opened up again, the slope is remarkably similar to the initial production slope, again indicating flow from the fractures followed by flow from the matrix.

These good results are attributed in part to the combination of the fracture modeling capabilities in WEM and the detailed, fine gridding around the well’s horizontal fractures provided by the reservoir simulator used.

So far, shale gas is proving to be a tricky play. But the ability to accurately model the reservoir will help operators develop more reliable strategies for optimizing production performance, which will help make these plays more profitable.


 
   

 

 

 Attendees Report Big Value from Training Courses

Despite the economic downturn, demand for Moseley training courses remains strong. Both verbally in closing comments and on written course evaluations, attendees report that they learn a good deal that will directly and immediately help them in their jobs.

Some specific feedback includes: "Extremely improved my knowledge," “Examples were very good," "Very well put together course," and "We need to give this to my entire team."

 
In private in-house courses, students have been pleased when they can work on actual projects while in class, and it also provides added benefits.

First, the vested interest in the problem helps students learn better. And second, they gain real, practical business value by having their classmates and the instructor helping them develop solutions.

We always invite companies to send us data sets before in-house classes, but we can also work
 
them "on the fly". Or, students are welcome to bring problem sets to class to discuss with the instructor privately on breaks.

Specific course content can also be easily adapted (even on the fly) to better suit particular student needs. For example, in a recent class a student who uses WEM primarily for perforation design requested some additional instruction on that, which we were able to deliver.

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