Method and system for acquiring three-dimensional rock mechanical parameters

A rock mechanical parameter, three-dimensional technology, applied in the field of geophysical exploration, can solve the problems of poor accuracy of three-dimensional rock mechanical parameters, and achieve the effect of strong applicability

Active Publication Date: 2016-05-18
PETROCHINA CO LTD
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Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides a method and system for obtaining three-dimensional rock mechanics parameters to overcome the defect of poor accuracy of the three-dimensional rock mechanics parameters obtained in the prior art

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  • Method and system for acquiring three-dimensional rock mechanical parameters
  • Method and system for acquiring three-dimensional rock mechanical parameters

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Embodiment Construction

[0026] figure 1 The flowchart of the three-dimensional rock mechanics parameter acquisition method provided by the embodiment of the present invention, such as figure 1 As shown, the method provided in this embodiment specifically includes:

[0027] Step 101, obtaining the shear time difference and the compressional wave time difference according to the acoustic logging data of known wells in the target work area, and determining the relationship between the shear wave time difference and the compressional wave time difference;

[0028] Specifically, if there is dipole acoustic logging data in the target work area, the shear time difference is directly obtained from the dipole acoustic logging data; if the target has acoustic full-wave logging data, separate Shear wave time difference. The general logging data will contain the P-wave time difference information, from which the P-wave time difference can be obtained.

[0029] Take the field application in xx district as an e...

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Abstract

The invention provides a method and a system for acquiring three-dimensional rock mechanical parameters. The method includes the following steps: 1) acquiring transverse wave time difference and longitudinal wave time difference according to known acoustic logging data of a well, determining the relationship between the transverse and the longitudinal wave time differences, and according to the relationship, determining transverse wave velocity and longitudinal wave velocity; 2) according to density logging data and the longitudinal wave velocity, determining a density-wave velocity relationship between the rock density and the longitudinal wave velocity; 3) according to the longitudinal wave velocity, calibrating earthquake velocity field data; 4) calculating the three-dimensional rock mechanical parameters according to the calibrated earthquake velocity field data and the rock density to obtain dynamic three-dimensional rock mechanical parameters; and 5) converting the dynamic three-dimensional rock mechanical parameters into corresponding static values. The method for acquiring the rock mechanical parameters comprehensively considers the logging data and earthquake data and can adapt spatial non-continuity in a three-dimensional geologic body, so that the method has better adaptability.

Description

technical field [0001] The invention belongs to the field of geophysical exploration, and in particular relates to a method and system for acquiring three-dimensional rock mechanics parameters. Background technique [0002] Accurate calculation of rock mechanical parameters plays an important role in formulating perfect drilling, well completion and oil and gas development plans and technical measures, and reducing operational risks. There are two values ​​of rock mechanics parameters, dynamic and static. The static value is obtained directly through indoor core sample tests; the dynamic value is calculated based on geophysical logging data. The indoor experiments can be used for reference. However, due to the limited acquisition of core samples, relevant parameters of the entire target layer cannot be obtained. Acoustic logging has the advantages of continuous measurement and high resolution, and can accurately determine the physical parameters and formation parameters wit...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/07
Inventor 张辉杨海军蔡振忠尹国庆陈胜袁芳欧方军李玉坤
Owner PETROCHINA CO LTD
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