Why Higher Oil Prices Don’t Guarantee More Permian Production – Part 2 of 2
By Patrick Patton, VP of Products, B3 Insight
In Part 1 of this series, we examined how rising oil prices no longer guarantee production growth in the Permian Basin. As produced water volumes increase and disposal pore space tightens, the basin’s ability to manage water is becoming a central factor in determining how much oil can be produced.
Read Part 1 here.
In Part 2, we examine a second dynamic shaping the basin’s future. As operators move beyond the Permian’s most productive rock, wells are generating higher volumes of water relative to oil. That shift is beginning to change development economics and raise the cost of managing produced water across the basin.
The Tier 1 Era That Fueled Permian Growth
Much of the early horizontal drilling in the Permian targeted what operators refer to as Tier 1 rock—the most productive portions of the reservoir where oil output is highest relative to water production. These areas generated strong well economics and helped drive the basin’s extraordinary growth over the past decade.
As those areas become increasingly developed, operators gradually move down the geologic quality curve. Lower-tier reservoirs in the Permian are still productive by global standards, but they tend to produce higher volumes of water relative to hydrocarbons. This shift has important economic implications because water costs scale differently than oil production.
When Water Volumes Rise Faster Than Oil Production
Consider a simplified example:
A strong Tier 1 well might produce 1,000 barrels of oil per day with a water-to-oil ratio of roughly 3:1.
That well generates approximately 3,000 barrels of produced water each day that must be transported and injected.
Transportation and disposal costs average around $1 per barrel.
Water management operating cost are roughly $3 per barrel of oil produced.
Now consider a well drilled into slightly lower-tier rock producing 750 barrels of oil per day with a water-to-oil ratio of 6:1.
That well generates approximately 4,500 barrels of water per day.
At the same disposal cost of $1 per barrel, water management operating costs increase to $6 per barrel of oil produced.
Oil production declines by 25 percent, while water handling costs increase by 100 percent.
The economic impact is not linear. As water-to-oil ratios increase, operating costs can rise quickly while hydrocarbon output declines, compressing margins and changing the economics of development.
The Rising Cost of Managing Produced Water
At the same time, the cost of water management itself is rising. Disposal wells increasingly operate under higher pressures as injection formations gradually fill. Pipelines must transport water longer distances to reach regions with available disposal capacity.
Permitting processes have become more complex as regulators respond to seismic concerns and groundwater protection issues. These pressures push water disposal costs higher. What was $1 per barrel can quickly become $1.50 per barrel, adding cost and complexity to the system.
Water Follows a Different Cost Curve
In many oilfields around the world, operational efficiency improves as development progresses. Drilling and completion costs typically decline as operators refine techniques and scale operations. Water, however, follows a different trajectory.
In the Permian Basin, pore space has become a valuable commodity. As disposal formations gradually fill and reservoir pressures increase, the cost of managing produced water trends upward rather than downward. The basin is discovering that underground storage capacity for water is just as critical to development as the hydrocarbons themselves.
Economic Pressure Drives Innovation
Eventually the economics may reach a point where alternative approaches become more attractive. Engineers rarely adopt new technologies simply because they are novel. They adopt them when economic pressure forces innovation.
The Permian Basin still contains enormous hydrocarbon resources. Geology is not the limiting factor. What increasingly governs the basin’s future is the ability to manage the water that accompanies those hydrocarbons to the surface.
Global oil markets will continue to react to geopolitics, wars, and supply disruptions. Prices will rise and fall accordingly. But in the Permian Basin, the engine of American oil production, the true governor on growth may be water, and water may ultimately determine how much oil the basin can produce.
Data Source: B3 Insight basin-wide water, injection, and subsurface pressure datasets.