A gathering system is the web of small-diameter, relatively low-pressure pipelines that collects raw oil, gas, and water from individual wells and well pads and moves it to a central point - a tank battery, gas processing plant, or trunk-line interconnect. It is the first link of midstream infrastructure between the wellhead and the wider transmission network.
Gathering System in one line: A gathering system is the network of small pipelines that collects production from individual wells and delivers it to central processing facilities or larger transmission pipelines.
Individual wells produce at modest, variable pressures and rates, and they are scattered across a lease or basin. A gathering system aggregates all of that flow so it can be measured, separated, treated, and compressed efficiently at central facilities rather than at every wellhead. Gas gathering lines carry raw wet gas from pads to a gas plant; oil gathering lines move crude from lease batteries to a central tank facility or LACT point; water gathering lines route produced water to disposal.
Because wells decline and pipeline pressure must be managed, gathering systems usually include field compression to boost low-pressure gas, plus separators, dehydration, and measurement at key nodes. The layout is often a radial or trunk-and-lateral pattern feeding one or more central delivery points.
Every well or pad entering a gathering system typically has a meter (orifice, turbine, ultrasonic, or Coriolis) so production can be allocated back to the correct lease and royalty owner. Pressure and flow are monitored throughout the system because a rising line pressure can back production off a well, while a sudden pressure drop can indicate a leak or line break.
Gathering systems are geographically spread and often unmanned, which makes them a classic SCADA application. RTUs and flow computers at wellheads, compressor stations, and delivery points report pressure, flow, temperature, and equipment status back to a central system. A cloud-native SCADA platform can poll those field devices over Modbus, DNP3, or MQTT to give operators a single live view of the whole gathering network, trend line pack, and alarm on abnormal pressure profiles that hint at a blockage or leak.
Gathering lines are smaller-diameter, lower-pressure pipelines that collect raw production near the field. Transmission lines are large, high-pressure trunk pipelines that carry treated product long distances between regions. Gathering feeds processing and treating; transmission moves the finished, pipeline-quality product to market.
As wells deplete, wellhead pressure falls and can drop below the pressure needed to push gas into the gathering line and onward to the plant. Field compressor stations boost that low-pressure gas so wells keep flowing and the system maintains throughput. Managing gathering-line pressure is central to keeping production online.
Field RTUs and flow computers at wellheads, meters, and compressor stations report pressure, flow, and status over protocols like Modbus, DNP3, or MQTT. A SCADA platform aggregates them into one live map of the network, so operators can trend line pressures, allocate production, and get alarmed on the pressure anomalies that indicate a leak, freeze-off, or blockage.
This page references the protocol specifications published by the organizations below. Editions, product capabilities, and documentation change over time - confirm current requirements and specifications directly with the source.
Last reviewed: July 27, 2026. Merobix is not affiliated with, endorsed by, or sponsored by these organizations; their names are used only to identify the standards and products discussed.
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