an apparatus is utilized for obtaining flow measurements from an individual oil and gas well . the apparatus utilizes pipe segments rather than vessels to separate the fluid components into a gas phase , a water phase , and an oil phase . separation of the flow stream into the different phases allows the measurement of a particular phase . because the oil stream may continue to contain a small amount of water , a water cut meter may be employed to determine the water content in the oil stream . the apparatus may be configured as a skid package to facilitate transportation and installation of the unit .