The Application Research Of Bubbling Umbrellas In Lamadian Oil Deposit

Lamadian oil deposit locates in the northernmost of Daqing placanticiline,It is a gas cup pool of bedded sandstone brachyanticline,which is dominated by structure. The axis of its structure is at the gas cup, the maximal gas bearing area is 32.3km~2,the gas in place is 99.59×10~8m~3. With the constant deepening of oil field development, the degassing appearance of oil wells getsvery seriously because of the reservoir presure's decreasing. This appearance brings a considerable trouble to the dymanic monitoring of production. Oil ,water two-phase flow in many oil wells shrift to oil, water, gas three-phase flow. The two-phase flow testing instruments can not meet the demand of the dymanic monitoring in Lamadian oil deposit any more.In this paper, Based on large amounts of flow full differential pressure and water logging precision ring hollow relationship found,Gas is ever lamadian oilfield water logging precision ring hollow factors, In the differential pressure flow enough about 7MPa than absolute error of measured water appears to flow and rising, moisture measurement result completely empty have caused distortion, the test data in water ring lamadian oilfield efficiency is low.through the the application research of the bubbling umbrella of coaxial line phase method annular water detector in Lamadian oil deposit. Compared with normal bubbling unbrellas, With bubbling umbrellas for the different densities. Gas leakage through the gap directly into the umbrella outside. Since the oil has the relatively high viscosity, its leakage can be ignored, at the same time it prevent the loss of water. Since this, it excludes the impact of the measurement of gas production of oil wells, and improve the accuracy of dymanic test data of degassing oil wells. based on the knockout water cut test can decrease the impact of production gas to liquid flow towater cut test in procuction logging. It attained the requirements of practical application, and improve the accuracy of the test data effectively, and it makes a vital function to dymanic monitoring of oil wells in production.