Method for evaluating cement bond quality of two interfaces of cased well

A technology of cement bonding and cased wells, which is applied in construction and other fields, and can solve problems such as the difficulty in testing the quality of cementing at the second interface and the application of cement bonding at the second interface.

Active Publication Date: 2015-12-09
INST OF ACOUSTICS CHINESE ACAD OF SCI
View PDF8 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the influence of various factors on the acquisition signal, there is no application of this technology in the evaluation of the cement bond quality of the two interfaces in the field application examples at home and abroad.
[0004] Most o...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for evaluating cement bond quality of two interfaces of cased well
  • Method for evaluating cement bond quality of two interfaces of cased well
  • Method for evaluating cement bond quality of two interfaces of cased well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The present invention will be described in detail, clearly and completely below in conjunction with the accompanying drawings and specific embodiments. In the accompanying drawings, it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] figure 1 It is a schematic diagram of a method for evaluating the cement bonding quality of a cased well interface provided by an embodiment of the present invention. like figure 1 As shown, the embodiment of the present invention specifically includes the following steps:

[0026] Step 101, placing the ultrasonic emitting device and the ultrasonic receiving device at a circumferential interval in the horizontal direction, and putting them into the cased well....

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for evaluating cement bond quality of two interfaces of a cased well. In one embodiment, the method includes the steps that an ultrasonic transmitting device and an ultrasonic receiving device are arranged circumferentially in a spaced mode in the horizontal direction and placed in the cased well; the ultrasonic transmitting device transmits ultrasonic waves to the inner wall of the cased well at the incidence angle theta i, the ultrasonic waves are stimulated in the cased well to form a circumferential mode, various layers of media in the cased well reflect the ultrasonic waves to form reflected waves, and the incidence angle theta i is the included angle between the central axis and the normal at the intersection point of the central axis of the radiant surface of the ultrasonic transmitting device and the inner wall of the cased well; the ultrasonic receiving device receives echo signals, the echo signals are compared with echo signals received in a free casing pipe mode, and the cement bond quality corresponding to the forming position of the echo signals in the cased well is obtained. The directional ultrasonic waves are transmitted, the ultrasonic waves are stimulated in the cased well to form the circumferential mode, echo information is processed, and therefore bond states of different interfaces of well cementation cement can be detected.

Description

technical field [0001] The invention relates to an acoustic logging technology, in particular to a method for evaluating the cement bonding quality of two interfaces (cement and formation interface) of a cased well. Background technique [0002] The detection and evaluation of cement bonding quality in cased wells is of great significance to oil well engineering and oilfield development, mainly including the evaluation of the bonding status of the first interface (casing and cement interface) and the second interface. The earliest CBL / VDL cement bond logging is a commonly used detection method in cementing quality detection. Among them, CBL can be used to quantitatively judge the cement bond quality of the first interface; VDL can be used to qualitatively judge the cement bond quality of the second interface. However, both techniques only measure the average cementation quality within a certain longitudinal distance in the circumferential direction of the cement sheath, whi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): E21B47/005
Inventor 张秀梅苏畅林伟军王秀明
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap