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Oil and gas well flow imaging measurement method

A technology of flow imaging and measurement method, which is applied in the directions of measurement, earthwork drilling and production, wellbore/well components, etc. It can solve the problems of not being able to provide accurate information on fluid distribution, and achieve the effects of convenient application, small flow disturbance and low cost

Inactive Publication Date: 2016-05-18
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

The existing flow profile logging technology belongs to linear measurement, which collects the overall results of the medium within the detection range, and cannot provide accurate information on fluid distribution. New measurement methods and technologies are urgently needed

Method used

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  • Oil and gas well flow imaging measurement method
  • Oil and gas well flow imaging measurement method
  • Oil and gas well flow imaging measurement method

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] The invention provides a flow imaging measurement method for oil and gas wells, such as figure 1 As shown, the method includes:

[0026] Step S101, arranging a plurality of measuring electrode rings and shielding electrode rings at an axial interval on the oil well wall of the fluid to be measured;

[0027] Step S102, sequentially selecting an electrode in each measuring electrode ring as an excitation electrode, exciting the excitation electrode and e...

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Abstract

The invention discloses a measuring method for flow imaging of an oil well. The measuring method includes axially arranging a plurality of measuring electrode retaining collars and shielding electrode retaining collars on an oil well wall of to-be-measured fluid; sequentially selecting one electrode in each measuring electrode retaining collar to serve as an exciting electrode, and exciting the exciting electrode and electrodes adjacent to the periphery of the exciting electrode to generate a fascicular electromagnetic field; sequentially selecting one electrode, two electrodes away from the exciting electrode, in each measuring electrode retaining collar to serve as a receiving electrode to receive response signals of fluid media; and processing the response signals received by each electrode of each measuring electrode retaining collar to generate flowing parameters and images of the cross section of the to-be-measured fluid. The measuring method is applicable to various situations of high and low water containing; scanning and measuring can be performed on the flowing cross section of multi-phase fluid repeatedly, so that soft field effects of common electric measurement can be overcome, the fluid media can be identified with high resolution, and interference on original flow of the multi-fluid fluid in the well is small; and the measuring method has the advantages of strong real-time performance, zero damage, low cost, simplicity in using and the like.

Description

technical field [0001] The patent of the invention belongs to the application of geophysical logging technology, and relates to an electromagnetic measurement method for dynamic monitoring of oil and gas well production and multiphase pipe flow imaging detection, specifically an imaging measurement method for oil and gas well flow. Background technique [0002] Oil and natural gas are stored in oil and gas layers thousands of meters deep underground, and are extracted through drilling. Oil and gas production well sections are generally provided with round steel casings or screens, and the angle is vertical, inclined or horizontal to the ground plane. Due to formation water or water injection development, the wellbore is often two-phase or three-phase flow of oil, gas and water. By using logging instruments to monitor the multiphase flow profile of the production well section, we can understand the production status of oil and gas layers, and take scientific and reasonable t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/002E21B47/10
Inventor 吴锡令
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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