Differential Pressure Flow Measurement Based On Stratified Injection Wells Testing Theory And Experimental Research

Most of our oil field geological structure is inhomogeneous multilayer sandstonestructure, Secondary recovery methods mainly take the Water flooding, In order to improvethe efficiency of oil extraction, Not only need to grasp the different geological structure of thereservoir, but also control every reservoir permeability、porosity、reservoir pressure、waterabsorption and other parameters.While layered testing technology has important significanceto ensure the reasonable water injection, timely grasp the dynamics of formation fluidpermeability.Water injection is important parameter that characterization the oil well dynamic changecharacteristics and evaluation reservoir production. In this paper, we study the column-coneflowmeter is improved from the traditional V cone flowmeter. Not only achieve the aim ofmobile measuring various reservoir water quantity, But also avoid the straight pipe is too shortto affect the measuring accuracy for instrument.This paper studies the methods and content: Based on working principle of differentialpressure flowmeter, Combined with column-cone flowmeter work environment、uniquestructure、variation of near the flow field take pressure way and other factors comprehensiveconsideration. For compressible and incompressible fluid flow deduced respectively thesuitable formula of column-Cone flowmeter; According to pipe viscous losses and flowcoefficient of pipeline to speculate suitable size range of cone throttling. And according to thelaw of energy conservation and fluid continuity equation to set up eight groups simulationcomparative experiments. Using the methods that combinate theoretical analysis andsimulation results. To further optimize the throttling element size range. Within this rangemanufacture three physical model of throttle body. Follow the column-cone flowmeter in thetest tube sections selection principle. Based on the principles and methods of hierarchical testto structures reasonable test bench. And physical model of throttle body solid conduct fluidtest. Through the analysis of test results to verify the correctness of the mathematical formuladerivation. Compared with the simulation experiments at the same time. Receive the influencerules of the measurement result when a throttle body parameters changes. Finally select theappropriate sensor for column-cone flow tester. According to the hierarchical test workflow.To designed respectively process flow diagram of down-hole testing device measure module、data processing module flow chart and communication module flow chart.