Method for measuring water holding ratio of horizontal well by fusing total flow and conductivity probe array signal

A conductivity probe and probe array technology, applied in the field of multiphase flow detection, can solve problems such as limiting the accuracy of water holdup measurement in horizontal wells

Inactive Publication Date: 2016-03-16
BEIHANG UNIV
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Problems solved by technology

Since the main component of information fusion is the on-off information of the probe array in the

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  • Method for measuring water holding ratio of horizontal well by fusing total flow and conductivity probe array signal
  • Method for measuring water holding ratio of horizontal well by fusing total flow and conductivity probe array signal
  • Method for measuring water holding ratio of horizontal well by fusing total flow and conductivity probe array signal

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Embodiment Construction

[0053] The method proposed in this example is verified in a horizontal simulation well with an inner diameter of 125mm in the well logging test center of Daqing Petroleum Testing Service Branch. The length of the horizontal simulation well is 12m. The oil used in the experiment is diesel oil with a density of 0.825g / cm 3 , viscosity 3×10 -3 Pa·s, surface tension 28.62×10 -3 N / m. The experimental water is tap water with a density of 1g / cm 3 , the viscosity is 0.890×10 -3 Pa·s, the surface tension is 71.25×10 -3 N / m. The total flow rate of oil-water two-phase flow varies from 10 to 200m 3 / d, the range of moisture content is 0-100%. The logging tool is a shrinkable double-ring conductivity probe array logging tool, and the logging tool is located 12m away from the water inlet of the horizontal well.

[0054] In horizontal wells, the retractable double-ring conductivity probe array logging tool records the output of 24 conductivity probes through the conductivity measurem...

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Abstract

A method for measuring a water holding ratio of a horizontal well by fusing total flow and a conductivity probe array signal belongs to the technical field of multiphase flow detection. The method comprises: firstly, establishing a calculation relationship between an arc length of an oil phase sector of the horizontal well and the water holding ratio of the horizontal well; then acquiring the conductivity probe array signal, and obtaining a corresponding water holding ratio value as a reference value by using the arc length of the oil phase sector, which is recorded by a high speed camera; next, establishing a nonlinear support vector regression model from the total flow and the conductivity probe array signal to the reference value of the water holding ratio; and finally, performing high precise prediction on the water holding ratio of the horizontal well by using the established nonlinear support vector regression model. The experimental result shows that the method provided by present invention is feasible and effective; and not only is the method excellent in generalization, but also measurement precision of the water holding ratio can be greatly improved.

Description

【Technical field】 [0001] The invention belongs to the technical field of multiphase flow detection, especially for low-medium fluid production horizontal wells, and proposes a method of fusing total flow and conductance probe array signals and combining nonlinear support vector regression (Support vector regression, SVR) model to carry out horizontal well water holding method of rate measurement. 【Background technique】 [0002] Production logging refers to the geophysical logging performed during the production process of oil production wells, water injection wells, observation wells, etc. from commissioning to retirement, and can be divided into engineering technical logging, production layer evaluation logging and production dynamic logging. The main task of production dynamic logging is to dynamically monitor the flow profile of production wells, so as to understand the production status and fluid component content of the production layer, and provide a basis for oilfield...

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Application Information

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IPC IPC(8): G06F17/50E21B47/00
CPCE21B47/00G06F30/367
Inventor 徐立军张文曹章陈健军尹汭赵嘉宇
Owner BEIHANG UNIV
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