A Dynamic Measurement Error Compensation Method for Measuring Oil Holdup by Shunt Flow Method

Abstract

The invention belongs to the technical field of petroleum engineering and well logging, and in particular relates to a dynamic measurement error compensation method for measuring oil holdup by the split flow method. 1. Carry out the oil-water measurement experiment by the split flow method, and assume that the theoretical oil holdup rate of the tth experiment is V t , the measured actual oil holdup Vf t , calculate the oil holdup dynamic measurement error ΔV t ;2. Dynamic measurement error ΔV for oil holdup t Use gray system theory to identify and correct outliers; 3. Dynamic measurement error ΔVm for corrected oil holdup t Carry out numerical addition and anti-folding preprocessing calculations, and the dynamic measurement error of oil holdup rate after processing is ΔVP t ; 4. According to the dynamic measurement error ΔVP of oil holdup after pretreatment of data addition and depletion t , establish the dynamic measurement error prediction model of oil holdup; 5. Use the dynamic measurement error prediction model of oil holdup to compensate the dynamic measurement error of oil holdup caused by diversion. The method compensates the dynamic measurement error of the oil holdup measured by the split flow method, improves the accuracy of the oil holdup measured by the split flow method, and provides reliable oil holdup data for oil field measurement.

Description

Technical field: [0001] The invention belongs to the technical field of petroleum engineering and well logging, and in particular relates to a dynamic measurement error compensation method for measuring oil holdup by a shunt method. Background technique: [0002] With the use of water flooding oil production technology and the extension of production time, most of my country's onshore oil fields have entered the middle and late stages of development, and the water holdup of the reservoirs is extremely high, some even reaching 95%, and 70% of the newly discovered reserves are high water cut reserves. In the field of oil field dynamic logging, monitor the oil holdup of each production layer and provide reservoir production information, which can optimize the reservoir engineering plan, evaluate the effects of fracturing, water plugging and other engineering operations; in the field of oil and gas gathering and transportation, the oil, gas and water production of oil wells are o...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of inaccurate measurement of oil holdup caused by part of the oil flowing away with water in the process of dynamic measurement of oil holdup by the existing shunt method, and to provide a dynamic measurement of oil holdup by shunt method Error Compensation Method

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