SWD Proximity Search: Cutting Saltwater Disposal Costs

April 15, 2026 · BasinBaron

If you're producing oil or gas in Oklahoma, you're also producing water. In the Anadarko Basin, mature wells commonly make five to ten barrels of saltwater for every barrel of oil. Newer horizontal completions in the SCOOP and STACK can be even more water-intensive in the first year. That produced water has to go somewhere, and in Oklahoma, it almost always goes into a saltwater disposal (SWD) well.

The cost of getting rid of that water is one of the largest variable operating expenses for an independent producer. And the single biggest driver of disposal cost isn't the per-barrel disposal fee — it's the distance between your wellhead and the nearest active SWD facility.

The math: why distance is the variable that matters

Produced-water economics in Oklahoma break down into three components:

• Disposal fee: the price the SWD operator charges to take your water. In western Oklahoma, this ranges from $0.25 to $0.75 per barrel depending on the facility, volume commitments, and how badly the SWD operator needs throughput.
• Trucking cost: the cost of a saltwater hauler to move the water from your tank battery to the SWD. Trucking runs $1.50 to $4.00 per barrel depending on distance, road conditions, wait time at the SWD, and whether you have a dedicated contract or spot-haul.
• Pipeline cost: if you're connected to a saltwater pipeline (often called a produced-water gathering line), the per-barrel rate replaces trucking entirely. Rates vary, but $0.50 to $1.50 per barrel is typical for a pipeline connection in the Anadarko.

Look at those numbers. The disposal fee is relatively stable. But the trucking cost — which is the reality for most small operators — varies by a factor of 2.5x depending on how far the truck has to drive. A five-mile haul versus a fifteen-mile haul, repeated 300 days a year at 50 barrels a day, is the difference between $82,000 and $220,000 annually in disposal cost. On a lease that makes 20 barrels of oil per day at $70/bbl, that spread is the difference between a profitable well and a well you're thinking about plugging.

How SWD wells work in Oklahoma

A saltwater disposal well is a well permitted specifically to inject produced water into a subsurface formation. In Oklahoma, most SWD wells inject into the Arbuckle Group, a deep carbonate formation that sits below the productive oil and gas zones. The OCC regulates SWD wells under UIC (Underground Injection Control) Class II permits, and the OCC's data includes each SWD well's location, permitted injection zone, status, and operator.

Not every SWD well on the map is an option for your water. Some important filters:

• Active status. Many SWD wells in the OCC data are plugged, temporarily abandoned, or shut in. You need active disposal wells only.
• Capacity. Permitted injection volumes are public, but actual available capacity depends on how much throughput the well is already handling. Call the operator.
• Water quality requirements. Some SWD operators restrict what they'll take — high-sulfide water, water with too much oil carryover, or water that's been treated with certain chemicals may be rejected. This is negotiated between you and the SWD operator.
• Access. Road quality, lease access restrictions, and seasonal mud can make a geographically close SWD practically unreachable in spring. County roads in Caddo and Blaine Counties are notorious for this.

The manual search: how most independents find SWDs today

Ask any small Oklahoma operator how they found their SWD, and the answer is usually one of three things: "my pumper knew a guy," "I drove around and saw the sign," or "I called everyone in the phone book." This works when you've been in the same area for twenty years. It doesn't work when you're evaluating a new lease in a county you haven't operated in before.

The more systematic DIY approach is to pull the OCC's well data, filter for well type = SWD and status = active, geocode the locations, and plot them on a map relative to your lease. If you're comfortable with QGIS or Google Earth, this takes a few hours the first time. Start with the fundamentals: here's where to find free Oklahoma well data and what each source actually covers. The problem is that SWD well status changes — wells shut in, new wells come online, operators change — and your static map is stale the moment you export it.

You also need distance, not just dots on a map. Knowing that there are SWD wells "nearby" is less useful than knowing the three closest active SWDs are 4.2 miles, 7.1 miles, and 11.8 miles from your tank battery by road. The economics change at each of those distances, and you want to compare options before committing to a hauling contract.

What a proximity search tool actually does

A proper SWD proximity search takes your location (either a lat/long, a section/township/range, or a point on a map), buffers it by a radius you choose, and returns every active SWD well within that radius, sorted by distance. The better versions give you straight-line distance and show the SWD operator name so you can call them directly.

On BasinBaron, this is a core map feature. You click on your well or drop a pin on your lease, set a radius (default five miles, adjustable), and the map highlights every active SWD within range. Each SWD shows operator, API number, injection zone, status, and distance from your point. No QGIS, no shapefile download, no manual geocoding. The data refreshes from OCC filings, so newly permitted SWD wells appear as soon as they're in the public record.

Using SWD proximity to evaluate a lease before you buy

This is where the search becomes a deal tool, not just an operational tool. When you're evaluating a lease or a mineral acquisition, water disposal cost is a line item in your economic model — or it should be. The difference between "$1.50/bbl all-in disposal" and "$3.50/bbl all-in disposal" changes your breakeven oil price by several dollars per barrel.

Before you make an offer on a lease in an area you don't know, check the SWD proximity. If the nearest active disposal well is fifteen miles away over dirt roads, factor that into your offer price. If there are three active SWDs within five miles, your disposal costs are defensible and you can bid more aggressively. This is a five-minute check that can save you a five-figure mistake.

The same logic applies to drilling permit applications. When you file a Form 1000 with the OCC, you should already know where your water is going. Some operators figure this out after they spud, which means they've committed the capital before they've locked in the operating cost. Checking SWD proximity before you permit is the cheapest due diligence in the business.

The seismicity factor

Any discussion of SWD wells in Oklahoma has to acknowledge induced seismicity. The OCC has implemented volume restrictions, traffic light protocols, and area-of-interest directives that limit injection volumes in certain parts of the state. Some SWD wells that were active five years ago have been curtailed or shut in. This means the SWD landscape is dynamic — a map from 2022 doesn't reflect the current reality.

For operators, this creates both risk and opportunity. The risk: your preferred SWD could be curtailed, forcing you to truck farther. The opportunity: new SWD wells are being permitted in areas with lower seismicity risk, and some of these are closer to your acreage than the legacy facilities that got curtailed. Keeping a current map is not optional.

What to do right now

If you're producing in Oklahoma and you haven't mapped the SWD wells around your acreage recently, do it. If you're evaluating a lease, check SWD proximity before you make your offer. If you're permitting a new well, know where your water is going before you file the Form 1000.

You can do this manually with OCC data and QGIS, or you can open BasinBaron and do it in thirty seconds. Either way, the information is free and public. Not using it is the expensive choice.