The Research And Engineering Application Of Foxboro’s Net Oil Metering Skid System

The basic target oi the oil-well-metering is to get the production of oil wells accurately and analyze its production condition according to the fluctuation of wells’ output. It is significant to enhancement of well management. Currently, the oil well production mechanism is "single well-metering station-joint station" which has3levels of distribution for more than40years. In this mechanism, all single wells’ production is got by indirect calculation. Moreover, the accuracy of water ration is very low thanks to the manual measurement. To get the wells’ condition in time and offer accurate basic data for oil exploitation, it is essential to get full knowledge about every well’s production. The single-well metering without separation is the most difficult and complex in crude oil metering. As the medium from oil wells are3-phases of oil, water and gas. The conventional volume flow meter cannot meet the requirement in field as the net oil is full of bubble and water.For the application for oil well measurement, Foxboro supplied a total solution of Net oil and Gas Skid. The skid is composed of Hardware and Software. The hardware is on the base of Coriolis How meter and the whole skid consists of serials of smart meters. The skid can be installed on the wellhead for metering without3-phases separation and man-made analysis procedures. The skid contains flow meter, water-cut meter, Temperature Sensor, Multivariable Transmitter and the Net Oil Computer as well as the pipelines. The software is integrated into G306A from Red Lion Company. The communication between G306A and instruments is Modbus-RS485. The skid reports data to the management thru fieldbus type which contributes greatly to the automation for Oil fields. The paper locus on the analysis and research of skid and introduces the installation and application of all instruments contained. The skid has passed the test in the field and the test data meet the requirements of oil metering. The skid has been put into industrial application and shows its reliability.