RE:RE:Keep the boards clean...Excerpt from the link that I posted in my previous post:
I
n the Eagle Ford shale, the breakdown in wells based on early production showed little difference between the tiers. Tier 1 wells had a slight edge in wells producing more than 1,500 BOE/D, but was also a bit higher in the percentage of wells at 500 BOE/D or less. In the Midland Basin, the pie chart for tier acreage showed tier 1 outperformed lower tiers at both the high and low end.
The differences at the high end were relatively small. In the lowest quartile, the percentage of tier 1 wells was significantly lower but 42% of the tier 1 wells were in the bottom quartile, pointing to another problem highlighted by the data—many shale wells are not that productive. In this story, production is based on a 180-day measure that is adjusted as if it were from a 10,000-ft lateral, unless otherwise noted.
The message in the study is that reservoir rock quality matters, but even in what passes for good quality shale rock, getting oil out depends on where the well was located and how it was drilled, fractured, and produced.
“Rock is important, but a good rock without a good design is of less use,” said Anshu Mittal, an associate vice president for Deloitte.