This study compares the performance of openhole-packer completion systems with that of cemented-liner completion systems in the northern Montney gas resource play. The authors’ data demonstrate that the benefits of openhole completions include an increase in initial production (30-day average) (IP30) rates, an increase in expected ultimate raw gas recovery per well, and a decrease in stimulation-period costs, all on an unadjusted basis. When adjusted for total proppant placed or total fluid pumped on average per completion, the relative benefit of openhole systems ranges from 6 to 31%, depending on the test metric selected.
Recovery optimization from the Montney presents a unique development challenge because of the play’s extensive thickness and corresponding multilayer extraction potential. In the Blair/Town Block study area, it has been observed that openhole completions consistently outperform cemented-liner completions when considering standard metrics of production and cost.
Completion-liner systems for horizontal wells are designed to isolate hydraulic-fracture treatments to minimize stimulation pumping interference between successive stages. At present, two basic liner designs enjoy widespread use:
1. Openhole multistage (OHMS) liners, wherein annular isolation is provided by external packers.
2. Cemented-liner perforate-and-plug (CLPP) systems, wherein cement provides mechanical isolation along the liner annulus. These two liner designs are discussed in further detail in the complete paper....
Use of Microseismic Monitoring To Compare Completion Designs
20 October 2016