Optimizing Well Spacing

By Kash Kashikar, VP Completions Evaluation
MicroSeismic, Inc.

I recently attended the Eagle Ford Well Spacing and Completions Optimization conference.  The meeting was well attended with most of the presentations given by operators.  It is refreshing to see the operators sharing their experience and knowledge to a wider audience.  While the conference was focused exclusively on the Eagle Ford – the overall learnings are transferable to other basins.

There were some common themes and learnings that I took away from the 2 day congress. While a large number of wells have been drilled in the Eagle Ford, it will take another 70,000 wells to fully develop the Eagle Ford.  From all the experience the industry has, it is clear that there are several factors that are consistent across the region. For example – longer laterals generally result in increased production and higher quantity of proppant per foot results in higher EUR.  However, it was acknowledged that there are large variations across the region in rock properties, production and even between wells on the same pad.  This makes it very challenging to estimate the size and shape of the Stimulated Rock Volume (SRV), and further estimating the portion of the SRV that is contributing to production.  This topic was widely discussed – with equally varied approaches presented by different operators.

At MicroSeismic we have taken a unique deterministic approach to estimating the SRV which captures the spatial variation of the fracture density as well as the relative impact on the resulting porosity and permeability in the stimulated region.  This is further refined by computing a sub-set of the SRV volume, which represents the proppant filled fractures.  We call this Productive-SRVTM.  The SRV and Productive-SRV provide an accurate description of the stimulated rock volume and helps define the size and shape of the drainage volume that will contribute to the initial as well as the long term production.  The SRV and P-SRV volumes can be used for production forecasting and history matching and provides an invaluable tool for determining the well spacing and completion optimization.

MicroSeismic’s focus is to help customers lower F&D costs and increase production through optimized stimulation treatment, improved understanding of the reservoir, and optimized field wide development.  To learn more about these methods and how to optimize your treatment design join us for our free webcast on Tuesday July 22. To register, click here.

Kash