Dynamic measurement error compensation method for measuring oil holdup by split-flow method

A technology of dynamic measurement and compensation method, which can be used in measurement, earthwork drilling, special data processing applications, etc., and can solve problems such as inaccurate oil holdup measurement.

Active Publication Date: 2020-12-18
东营点阵信息科技有限公司
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  • Application Information

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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

Method used

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  • Dynamic measurement error compensation method for measuring oil holdup by split-flow method
  • Dynamic measurement error compensation method for measuring oil holdup by split-flow method
  • Dynamic measurement error compensation method for measuring oil holdup by split-flow method

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Embodiment 1

[0065] A dynamic measurement error compensation method for measuring oil holdup by a shunt method, the compensation method comprising the following steps:

[0066] Step 1: Carry out the oil-water measurement experiment of the split flow method, and set the theoretical oil holdup rate V of the t-th experiment t , the measured actual oil holdup Vf t , calculate the oil holdup dynamic measurement error ΔV t , t=1, 2, 3, ..., n, n is the total number of experiments carried out;

[0067] Oil holdup dynamic measurement error ΔV i The calculation method is:

[0068] ΔV t =V t -Vf t

[0069] Step 2: Dynamic measurement error ΔV for oil holdup t Using the gray system theory to identify and correct outliers, the corrected oil holdup dynamic measurement error is ΔVm t ;

[0070] Dynamic measurement error ΔV for oil holdup t The gray system theory is used to identify and correct outliers as follows:

[0071] Oil holdup dynamic measurement error ΔV t Satisfy Then ΔV t is a ...

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Abstract

The invention belongs to the technical field of petroleum engineering and well logging, and particularly relates to a dynamic measurement error compensation method for measuring oil holdup by a split-flow method. The method comprises the following steps: 1, carrying out a split-flow method oil-water measurement experiment, setting the theoretical oil holdup of the t experiment as Vt, settingthe measured actual oil holdup as Vft, and calculating the oil holdup dynamic measurement error delta Vt; 2, identifying and correcting the abnormal value of the oil holdup dynamic measurement error delta Vt by adopting a grey system theory; 3, performing digital addition and anti-pleat preprocessing operation on the corrected oil holdup dynamic measurement error delta, wherein the processed oil holdup dynamic measurement error is delta; 4, establishing an oil holdup dynamic measurement error prediction model according to the digital addition and anti-pleat preprocessed oil holdup dynamic measurement error delta; and 5, compensating the oil holdup dynamic measurement error caused by split flow by utilizing the oil holdup dynamic measurement error prediction model. According to the method,the dynamic measurement error of the oil holdup measured by the split-flow method is compensated, the precision of the oil holdup measured by the split-flow method is improved, and reliable oil holdupdata are provided for oilfield metering.

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...

Claims

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Application Information

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IPC IPC(8): E21B49/00E21B47/00G06F30/20G06F17/10
CPCE21B47/00E21B49/00G06F17/10G06F30/20
Inventor 韩连福付长凤黄赛鹏马舜祺刘超姜继玉
Owner 东营点阵信息科技有限公司
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