While-drilling orientation well cementation quality scanning method and device
A technology of drilling while drilling and cementing, which is applied in the direction of drilling equipment, measurement, drill pipe, etc., and can solve the problems of inapplicability and lack of azimuth resolution ability
Pending Publication Date: 2022-03-04
CHINA OILFIELD SERVICES
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Problems solved by technology
However, the above-mentioned technical methods have certain requirements for measuring well conditions, and cannot be applied in highly deviated or horizontal wells
[0004] In recent years, the method of cementing quality evaluation based on acoustic waves while drilling has gradually developed. This technology is not limited by well conditions and can be applied to the evaluation of cementing quality in highly deviated or horizontal wells, but it has no azimuth resolution ability
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[0041] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0042] figure 1 A schematic flow chart showing a method for scanning azimuth cementing quality while drilling according to an embodiment of the present invention, as figure 1 As shown, the method includes the following steps:
[0043] In step S101, the acoustic wave emitting transducer rotates with the drill collar and emits an acoustic wave signal.
[0044] Specifically, the acoustic wave emitting transducer emits an acoustic wa...
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The invention discloses a while-drilling azimuth well cementation quality scanning method and a while-drilling azimuth well cementation quality scanning device. According to the technical scheme provided by the invention, the sound wave transmitting transducer rotates along with the drill collar and transmits the sound wave signal; the receiver array rotates along with the drill collar, receives the sound wave signal, obtains sound wave amplitude information to carry out well cementation quality amplitude imaging, and obtains attenuation information of a receiver; after the receiver array rotates for a circle along with the drill collar, the obtained sound wave amplitude information and attenuation information in all the directions are respectively summarized and processed, and the final azimuth well cementation quality amplitude and attenuation imaging result are obtained. According to the directional well cementation quality evaluation device and method, the sound wave transmitting transducer is used for directionally transmitting sound wave signals to the outside of a well, the receiver array is used for obtaining sound wave amplitude and attenuation information in the direction, the sound wave amplitude and attenuation information in different directions outside a sleeve are completely collected through rotation of the drilling tool, and directional well cementation quality evaluation is conducted through the simple system structure design.
Description
technical field [0001] The invention relates to the field of acoustic survey, in particular to a method and device for scanning azimuth cementing quality while drilling. Background technique [0002] In the field of oil and gas field exploration and development, it is necessary to inject cement between the casing and the formation. The cement sheath formed after the cementing operation can support the casing and form sufficient hydraulic cementation force to ensure the hydraulic isolation between layers. If the cementing quality is not good, it will lead to interlayer fluid channeling and increase the cost of exploration and development. Therefore, the evaluation of cement cementation quality is of great significance to the safe development of oil and gas fields and environmental protection. [0003] In the prior art, the logging technology based on the wireline acoustic wave is the most widely used, such as the traditional CBL / VDL (acoustic amplitude / variable density) loggi...
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IPC IPC(8): E21B47/005E21B47/12E21B17/16
CPCE21B47/005E21B47/12E21B17/16
Inventor 孙志峰仇傲李杰罗博彭凯旋赵龙刘西恩
Owner CHINA OILFIELD SERVICES