The short answer: saltwater disposal monitoring means watching three things on your produced water system between pumper visits: how full the water tanks are, how much water is flowing to disposal, and what pressure the injection line is running at. When any of them moves the wrong way, someone gets a text before the tank runs over or the oil side gets shut in. TinyPumper watches all three on a conventional site with a radar tank sensor, a turbine meter reader and a pressure sensor, self-installed in 8 minutes, with one flat monthly rate per site.
It’s 2 a.m. and a water tank at the far end of the route is filling faster than the hauler planned. Nobody is there. By the time the pumper pulls up at 7, the tank is at the top, the oil wells feeding that battery have to come down, and the day starts with a cleanup instead of a route.
That is the problem saltwater disposal monitoring is for.
What is saltwater disposal monitoring?
Saltwater disposal (SWD) monitoring is the remote watching of the produced water side of an oil and gas operation. Produced water, also called salt water or brine, comes up with the oil. It goes into water tanks at the battery, then either gets hauled off by truck or piped to a disposal well, where it is pumped back underground.
Monitoring that system means three readings:
- Tank level. How full each produced water tank is, and how fast it is filling.
- Flow. How much water is moving through the line to disposal, read from a turbine meter.
- Injection pressure. What pressure the line or the disposal well is running at.
It is not the same as running a commercial disposal facility from a control room. It is the producer’s view of their own water, the part of monitoring your wells between visits that most people forget until a tank runs over.
What is a saltwater disposal well?
A saltwater disposal well is a well drilled to put produced water back underground, into a formation that can take it. In the United States, these are Class II injection wells under the federal Underground Injection Control program. Each one runs under a permit from the EPA or the state agency that oversees injection in that state.
The permit sets the rules for that well. That usually includes limits on injection pressure and records of volumes. The details differ by state and by permit, so the permit itself is the place to check, not a blog post.
What matters for monitoring: if your operation sends water to a disposal well, someone has to know the tanks are not running over, the water is actually moving, and the pressure looks normal.
Why does produced water monitoring matter to a producer?
Water is the part of the operation that never takes a day off. Oil wells can sit. Water keeps coming as long as the wells run.
Four things go wrong when nobody is watching it:
- Overflows. A water tank that fills overnight becomes a spill, a cleanup, and a report.
- Shut-ins. When the water has nowhere to go, the oil wells feeding that battery come down. You lose barrels to a water problem.
- Hauling surprises. Without levels, trucks get called too late (full tank) or too early (half a load you paid full price to haul).
- Dead disposal pumps. A transfer or injection pump that quits looks fine from the road. Flow and pressure readings show it within the hour.
How do you monitor saltwater tank levels remotely?
A sensor sits on top of each produced water tank and measures the level. The reading goes to a gateway on site, and the gateway sends it to the cloud. You see it on a phone or a dashboard and get an alert when a tank crosses a level you set.
TinyPumper uses a radar sensor that mounts on top of the tank. It never touches the fluid, so salt water has nothing to corrode, foul or freeze. The sensor reads every hour and also wakes every 5 minutes to check your alarm levels, so a fast-filling tank triggers an alert right away instead of waiting for the next hourly report.
For oil tanks on the same battery, it is the same sensor and the same app. Oilfield tank monitoring covers the oil side in more detail.
How do you measure produced water flow to disposal?
With a turbine meter in the water line. The meter counts the volume moving through it. A reader on the meter sends that count to the gateway, so you see flow and total volume without anyone walking out to read a dial.
TinyPumper reads Turbines Inc meters. The reader is a TinyPumper device at $349 per meter, the same one-time price as any other TinyPumper device. If you need a meter, we size it from your line size, pressure range and expected flow rate, and pass the meter through at cost. If your line already has a Turbines Inc meter, the reader goes on that.
Flow is the reading that tells you whether water is actually leaving. A tank level that holds steady while the wells are running means the water is going somewhere. Flow that drops to zero while the tanks climb means it is not.
How do you monitor injection pressure?
A pressure sensor goes on the injection line or at the wellhead of the disposal well. It reports pressure on the same hourly schedule, with the same 5-minute alarm check as the tank sensors.
Pressure tells you two things. A sudden drop usually means a pump quit or a line is leaking. A slow climb can mean the formation is taking water less easily, which is worth knowing long before it becomes a problem with the permit or the pump.
Your disposal permit sets the most pressure you may use at the surface. Put the high-pressure alarm below that number, with enough room to act, so you hear about a climb before it becomes a permit problem. A low-pressure alarm catches the other failure: a pump that quit while water keeps filling the tanks.
How do readings get off a remote disposal site?
Disposal wells and water stations often sit where nothing else does: no power line and no tower worth trusting. TinyPumper’s gateway runs on solar and uses satellite, which covers 100% of the continental US. Sensors talk to the gateway over Bluetooth, up to 8 per gateway. There is no radio tower to build, no trench to dig and no carrier bill of your own.
What does a TinyPumper water setup look like?
One gateway per site handles up to 8 sensors. A typical produced water setup at a battery might be:
- Radar sensors on each water tank.
- A reader on the turbine meter in the disposal line.
- A pressure sensor on the injection line.
The same gateway can carry the oil tank sensors and wellhead pressures at that site. It is all one site, so it is all one flat monthly rate, with unlimited sensors at that location.
The basics:
- Hardware: $349 a sensor, one time. Then one flat rate a month per site, unlimited sensors.
- Install: you self-install in 8 minutes. No electrician, no trenching.
- Coverage: 100% of the continental US, because we use satellite.
- Guarantees: 60-day money-back trial, and we pay the return shipping. Lifetime hardware replacement on every sensor.
Producers who watch their sites this way cut lease runs by 30 to 50% and catch failures days sooner. Water is a big part of that, because a full water tank is one of the most common reasons a pumper has to drive out at a bad hour.
Who is saltwater disposal monitoring not for?
If you run a commercial disposal facility that needs supervisory control, automatic shut-in logic or custody-transfer metering from a control room, this is not that. That job belongs to a full SCADA system and an integrator.
TinyPumper is for producers who want to know their water tanks, water flow and injection pressure between visits without starting a SCADA project. That covers most conventional batteries, from a handful of sites to thousands.
Saltwater disposal monitoring: common questions
What is saltwater disposal?
Saltwater disposal is how a producer gets rid of the water that comes up with oil and gas. The produced water goes into tanks at the battery, then gets hauled by truck or piped to a disposal well, where it is injected back underground into a formation that can take it. In the US those disposal wells are Class II injection wells, run under a permit.
What is a disposal well?
A disposal well is a well used to inject produced water back underground instead of producing from it. In the US it is a Class II well under the Underground Injection Control program, with a permit from the EPA or the state agency in charge of injection. The permit sets that well’s operating limits, so check the permit for specifics like pressure limits and volume records.
Can you monitor produced water tanks without SCADA?
Yes. A radar sensor on top of each water tank, a gateway on site and a phone app cover tank levels without a SCADA project. TinyPumper adds a reader for Turbines Inc meters to track flow and a pressure sensor for the injection line. You self-install it in 8 minutes, and you pay one flat monthly rate per site with unlimited sensors.
How often does a saltwater tank level sensor report?
A TinyPumper tank sensor reads every hour to save battery. Between those reads, it wakes every 5 minutes to check the alarm levels you set. If a tank crosses a line, the gateway sends the alert right away instead of waiting for the next hourly report, so a tank filling fast at 2 a.m. gets caught that night.
Does it work with the turbine meter I already have?
If the meter is a Turbines Inc meter, yes. The TinyPumper reader goes on it, at $349 per meter, the same as any other TinyPumper device. TinyPumper does not integrate other meter brands. If your line has a different meter, we can size and source a Turbines Inc replacement and pass the meter through at cost.
How deep are saltwater disposal wells?
It depends on the well. A disposal well is drilled to a formation that can take water safely, and that depth changes from field to field. The permit names the injection zone and the limits for that well. For monitoring, depth matters less than the surface numbers you can watch every day: tank levels, flow to the well, and injection pressure against your permit’s limit.
Watch your water before it watches you
Produced water is the one stream that never stops. If you want to know your water tanks, flow and injection pressure between visits, without a SCADA project, TinyPumper does it on one gateway per site.
See how TinyPumper monitors produced water.
For the rest of the site, start with the full guide to oil well monitoring systems.