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Cased well orientation acoustic logging method

A cased hole and acoustic wave technology, applied in wellbore/well components, measurement, earthwork drilling and production, etc., can solve problems such as poor azimuth resolution and multiple solutions

Inactive Publication Date: 2007-09-26
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In 2005, Schlumberger proposed the method of "three-dimensional" acoustic logging in cased holes using monopole and dipole sound sources. However, due to the limitation of the directivity of dipole sound sources, this method has azimuth Significant disadvantages of poor resolution and multisolution

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  • Cased well orientation acoustic logging method
  • Cased well orientation acoustic logging method
  • Cased well orientation acoustic logging method

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Embodiment Construction

[0035] The above and other technical features and advantages of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0036] Please refer to FIG. 1 , which is a schematic diagram of an acoustic system for azimuth acoustic logging in a cased well of the present invention, which includes a phased combined arc array acoustic radiator 1 , a sound insulator 4 and two receiving probes. The receiving probe described here is a monopole acoustic wave receiving transducer 3, wherein the phased combined arc array acoustic wave radiator 1 is described in the invention patent of ZL 20031011 5236.1 declared by the applicant on 2003.11.24 Arbitrary directional acoustic radiators.

[0037] Please refer to Fig. 2, which is a schematic diagram of a phased combined circular arc array sound wave radiator of the present invention, which includes several circular arc arrays 6 and sound insulation materials 2, and the described sound insulation...

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Abstract

It relates to a casing sonic well logging uses phase control combined arc matrix sonic radiator, sound isolator, two single pole wave receiving transducer formed sonic system, the pulse wave radiated through the liquid filled well hole by the phase controlled arc sonic wave radiator transmitted through the well wall media at one side and received by two monopole sonic transducer, through special treatment to receiving signals of two source distance to realize the review for the directional quality and strata feature.

Description

technical field [0001] The invention relates to an acoustic wave detection method, in particular to an acoustic wave detection method used in a fluid-filled casing wellbore to realize the evaluation of cementing quality and formation properties within a specified azimuth range. Background technique [0002] Sonic logging is a logging method that implements acoustic measurements in fluid-filled boreholes. In cased wells, the cementing quality is evaluated by measuring the sound velocity and attenuation of various mode waves in the fluid-filled wellbore. [0003] From the 1940s to the present, acoustic logging tools have experienced the development process from single emission and single reception, single emission and double reception, and double emission and double reception. The measurement content of open hole has been developed from only measuring the velocity of formation compressional wave to the measurement of wave velocity and attenuation of sliding longitudinal wave,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/024E21B47/14
Inventor 车小花乔文孝鞠晓东
Owner BC P INC CHINA NAT PETROLEUM CORP