Research On Single Perforation Production Prediction Model Of Horizontal Well With Gas And Water Production Based On DT

In the development of oil and gas wells,horizontal wells are gradually replacing vertical wells as the main development method due to their own advantages.In order to facilitate oil and gas field management and improve recovery rates,it is particularly important to make effective predictions of the individual shot hole reserves of horizontal wells.A lot of research has been carried out in reservoir analysis technology both at home and abroad.Distinguishing from traditional reservoir analysis methods,this thesis adopts the research idea of numerical simulation to build a single injection hole production estimation model for reservoir analysis technology research,which provides a new idea for domestic reservoir analysis technology.The thesis broadens the testing of oil and gas wells’ use of distributed fiber optic temperature sensing technologies.The distributed fiber optic temperature measuring system(DTS)is the foundation for the study,which measures the temperature of horizontal well sections used in gas-water coproduction.On the theoretical foundation of the law of conservation of energy and the law of conservation of mass,a single injection hole production prediction model for gas-water coproducing horizontal wells was built.The prediction results were then presented in the form of a visualization window,with the main research conclusions listed below.(1)The wavelet thresholding algorithm is selected to perform noise reduction on the temperature data measured by DTS.The noise reduction of the recorded borehole temperature data is suited for the new threshold function due to its greater signal-to-noise ratio and reduced mean square error.The production estimation model uses a small number of test parameters to estimate and validate the production of a single shot hole in a horizontal well,using temperature data from the horizontal section measured by the DTS and the wellbore pressure data calculated from the pressure drop model to estimate the production of a single shot hole in a horizontal section(2)After constructing a fluid mixing model for the gas-water co-production horizontal well section,a single-hole production estimation model was developed by combining the law of conservation of mass,the law of conservation of energy and the temperature variation due to the Joule-Thomson effect.The error of the calculation results is within 5%,which proves that the capacity estimation model has certain practical application value and provides a basis for better formulation of the mining plan.(3)In order to achieve the integrity of the single shot hole capacity estimation system,the paper combines LabVIEW software to program the capacity estimation model visualization window.The single shot hole capacity estimation formulae for horizontal wells are visualized and the software interface is designed using LabVIEW,with all the involved formulae written into the back panel and the front panel presenting the inputs and outputs,providing a convenient way to calculate the single shot hole capacity estimation.