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A Well Logging Method of an Ultrasonic Logging Tool System

A well logging tool and well logging technology, applied in the direction of borehole/well components, measurement, instruments, etc., can solve problems such as inability to accurately fit horizontal section curves at the same depth

Active Publication Date: 2016-08-24
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method for fitting horizontal section curves based on Bezier curves, which solves the problem that previous algorithms cannot accurately fit horizontal section curves at the same depth

Method used

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  • A Well Logging Method of an Ultrasonic Logging Tool System
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  • A Well Logging Method of an Ultrasonic Logging Tool System

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Embodiment Construction

[0061] According to attached Figures 1 to 12 , the specific embodiment of the present invention is described further:

[0062] An ultrasonic logging system, such as figure 1 , including a downhole instrument 1, a depth instrument 4, a logging drawworks 5, a cable 2 and an uphole workstation 6. The downhole tool 1 is cylindrical, and the bottom of the downhole tool 1 is evenly distributed with m ultrasonic transducers with an angle of θ. The downhole tool 1 is vertically suspended in the well through the cable 2, and the cable 2 passes through the depth gauge 4 and the logging drawworks. 5 phases are connected, and the well logging drawworks 5 is connected to the well work station 6, and the well work station 6 is connected to a printer 7. The downhole tool 1 is lowered vertically through the depth gauge 4, the borehole diameter data is measured by the downhole gauge 1, the length of the lowering cable 2 is measured by the depth gauge 4, the well depth data is obtained, and ...

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Abstract

The invention discloses a logging method of an ultrasonic logger system. An underground gauge of the ultrasonic logger system is of a cylinder shape, m ultrasonic transducers with included angles of theta are evenly distributed at the bottom of the underground gauge, the underground gauge is perpendicularly hung in a well by a cable, the cable is connected with a logging winch by a depth gauge, the logging winch is connected with a well workstation, and the well workstation is connected with a printer. The underground gauge is dropped perpendicularly by the depth gauge, the underground gauge measures the well diameter, the depth gauge measures the dropping length of the cable to obtain the well depth data, and the well diameter data and the well depth data are transmitted to the well workstation. The logging method includes that the well workstation processes the received well diameter data by means of quadratic Bezier curve, or rational quadratic Bezier curve fitting horizontal section algorithm to obtain a well diameter which can correctly reflect the actual shape of a horizontal section.

Description

technical field [0001] The invention relates to the field of well logging, in particular to a well logging method of an ultrasonic logging tool system. Background technique [0002] Drilling method During the drilling construction process, the actual wellbore horizontal section formed during the drilling process is different at different depths, and the wellbore is not an ideal cylindrical shape. In order to ensure the quality of the project, it is necessary to timely and accurately measure and analyze the cross-sectional shape of the wellbore at different depths, which is of great significance for preventing the deviation of the wellbore and ensuring the quality of the project. [0003] The downhole instrument is continuously measuring during the lowering process. When there are enough horizontal sections measured, an algorithm is used to connect the horizontal sections in the depth direction (longitudinal) to generate a three-dimensional figure of the wellbore. Therefore,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/00G06F19/00
Inventor 曹茂永王毅金剑
Owner SHANDONG UNIV OF SCI & TECH
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