Method and device for determining well cementation quality and storage medium

A cementing and quality technology, applied in construction and other directions, can solve the problem of inability to obtain formation acoustic time difference information.

Active Publication Date: 2021-05-11
CHINA OILFIELD SERVICES
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  • Claims
  • Application Information

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Problems solved by technology

The short source distance measurement method is beneficial to measure the casing wave amplitude and attenuation, and evaluate the cement

Method used

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  • Method and device for determining well cementation quality and storage medium
  • Method and device for determining well cementation quality and storage medium
  • Method and device for determining well cementation quality and storage medium

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Embodiment Construction

[0049] Embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined arbitrarily with each other.

[0050] The steps shown in the flowcharts of the figures can be performed in a computer system, such as a set of computer-executable instructions. Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0051] In some technologies, cable array acoustic logging uses multiple transmitters and receivers for formation acoustic time difference measurement (sound velocity measurement), generally using long source distance measurement, usually the distance between the transmitter and the first receiver The spacing is about 8-12ft (243.84-365.76cm). The measureme...

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Abstract

The embodiment of the invention discloses a method and device for determining well cementation quality and a storage medium, and the method comprises the steps: carrying out the following operations on each depth measurement point: carrying out the preprocessing of through-casing long-spacing sound wave full-wave train logging data collected at the depth measurement point. The wave arrival time from the transmitter to each receiver at the depth measurement point is calculated by using the preprocessed through-casing long-spacing sound wave full-wave train logging data. The casing wave amplitude corresponding to each receiver at the depth measurement point is calculated according to the wave arrival time from the transmitter to each receiver. The casing wave amplitude corresponding to each receiver is corrected, and an array attenuation coefficient corresponding to the depth measurement point is calculated by using m corrected casing wave amplitudes. The well cementation quality is determined according to the array attenuation coefficients corresponding to all the depth measurement points. By means of the scheme, the well cementation quality can be determined by means of the collected through-casing long-spacing sound wave full-wave train logging data.

Description

technical field [0001] The embodiments of the present application relate to but are not limited to the field of well logging, and in particular relate to a method, device and storage medium for determining cementing quality. Background technique [0002] In well logging, the sonic method is mainly used to evaluate the cementing quality and interlayer cement sealing property. Acoustic cementing quality logging technology mainly includes acoustic amplitude, sectoral cement cement logging, ultrasonic imaging and curved Lamb wave ultrasonic imaging logging technology. Logging information such as acoustic impedance and bending Lamb wave attenuation rate are used to evaluate the cementing quality. In some technologies, wireline cementing quality instruments are measured with a short source distance. The most widely used sound amplitude (CBL / VDL) logging instrument uses a 3ft (91.44cm) source distance to measure the casing wave amplitude, and a 5ft ( 152.4cm) from the source dist...

Claims

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Application Information

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IPC IPC(8): E21B47/005
Inventor 张聪慧祁晓李东张璋周全尹璐范川王猛孙志峰赵龙
Owner CHINA OILFIELD SERVICES
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