A method for determining a pressure gradient in a pipeline conveying a multiphase mixture of, at least, oil and water. The method includes obtaining flow data from the pipeline conveying the multiphase mixture and obtaining a set of operation parameters related to a flow of the multiphase mixture in the pipeline. The method further includes determining, with a first artificial intelligence model and a second artificial intelligence model, a first and second predicted pressure gradient of the multiphase mixture in the pipeline, respectively, based on the flow data. The method further includes forming an aggregate pressure gradient from the first predicted pressure gradient and the second predicted pressure gradient and adjusting, with a pipeline controller, the set of operation parameters based on, at least, the aggregate pressure gradient.

System and methods for analyzing a multiphase production fluid, calculating production fluid phase flow rates, and calculating an oil/gas and oil/gas/water volume fractions of the multiphase production fluid, are provided. Contemplated systems and method may utilize fluidic piping, a production fluid supply valve, a fluidic separation chamber, an inert gas exhaust valve, a separation chamber pressure sensor, a fluidic separation detector, and a fluidic supply and analysis unit.

System and methods for analyzing a multiphase production fluid, calculating production fluid phase flow rates, and calculating an oil/gas and oil/gas/water volume fractions of the multiphase production fluid, are provided. Contemplated systems and method may utilize fluidic piping, a production fluid supply valve, a fluidic separation chamber, an inert gas exhaust valve, a separation chamber pressure sensor, a fluidic separation detector, and a fluidic supply and analysis unit.

A gas processing and transport system comprising a natural gas pipeline (1), a plurality of gas conditioning stations (4) connected to the natural gas pipeline between an upstream main natural gas supply and a downstream consumer end, the gas processing stations including carbon dioxide producers and carbon dioxide consumers, the carbon dioxide producers including natural gas consumers, at least one control system (10), and at least one sensor connected to the control system. At least one of the gas processing stations producing carbon dioxide is configured to inject produced CO.sub.2 into the natural gas pipeline, and at least the gas processing station(s) consuming natural gas comprise(s) a gas separating membrane (5) configured for separating at least CO.sub.2 from CH.sub.4.

A gas processing and transport system comprising a natural gas pipeline (1), a plurality of gas conditioning stations (4) connected to the natural gas pipeline between an upstream main natural gas supply and a downstream consumer end, the gas processing stations including carbon dioxide producers and carbon dioxide consumers, the carbon dioxide producers including natural gas consumers, at least one control system (10), and at least one sensor connected to the control system. At least one of the gas processing stations producing carbon dioxide is configured to inject produced CO.sub.2 into the natural gas pipeline, and at least the gas processing station(s) consuming natural gas comprise(s) a gas separating membrane (5) configured for separating at least CO.sub.2 from CH.sub.4.