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Quantitative rock Biot coefficient calculation method considering multiple influence factors

A technology of influencing factors and quantitative calculation, applied in the field of petrophysics, it can solve the problem of considering a single influencing factor, and achieve the effect of clear physical meaning, easy continuous calculation, and improved accuracy.

Active Publication Date: 2020-07-03
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0004] The present invention intends to provide a method for quantitatively calculating the rock Biot coefficient considering multiple influencing factors, and to solve the problem that the existing Biot coefficient calculation expression considers a single influencing factor

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  • Quantitative rock Biot coefficient calculation method considering multiple influence factors
  • Quantitative rock Biot coefficient calculation method considering multiple influence factors
  • Quantitative rock Biot coefficient calculation method considering multiple influence factors

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Embodiment Construction

[0035] Describe in detail below by means of specific implementation:

[0036] refer to Figure 1-Figure 8 , a method for quantitatively calculating the rock Biot coefficient considering multiple influencing factors, comprising the following steps:

[0037] S1. According to the conventional logging curve, determine the saturated rock bulk modulus at the corresponding depth of the logging point;

[0038] Specifically, figure 2 These are the various conventional well logging curves measured in the examples of this application. The conventional well logging curves include the compressional wave velocity logging curve, the shear wave velocity logging curve, the density logging curve, and the porosity logging curve at the corresponding depth of the logging point. and water saturation logging curves. It can adopt well logging methods commonly used in this field to obtain well logging data. Logging data can be represented by the corresponding relationship between physical quantit...

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Abstract

The invention belongs to the technical field of petrophysics, and discloses a quantitative rock Biot coefficient calculation method considering multiple influence factors. The method comprises the steps that according to a conventional logging curve, determining a saturated rock bulk modulus and a pore mixed fluid equivalent bulk modulus under the corresponding depth of the logging point; the rockmatrix mineral bulk modulus corresponding to a logging point is determined by utilizing a self-adaptive matrix mineral modulus inversion theory, then comprehensive pore structure parameters representing a rock pore structure are calculated, and finally a quantitative rock Biot coefficient considering multiple influence factors is calculated. According to the Biot coefficient expression provided by the invention, the accuracy of estimating the Biot coefficient is improved, lithology limitation is avoided, and the universality of the calculation expression is improved.

Description

technical field [0001] The invention relates to the technical field of rock physics, in particular to a method for quantitatively calculating the Biot coefficient of rocks in consideration of multiple influencing factors. Background technique [0002] The Biot coefficient is defined as the ratio of the pore volume change to the total volume change under the same pore pressure. It is mainly used to characterize the influence of formation pressure on rock effective stress, and is an internal factor controlling formation rock deformation and fluid seepage. This parameter is an important parameter for seismic reservoir prediction, fracturing drilling design, reservoir stress sensitivity research, wellbore trajectory optimization and wellbore stability analysis, and has important application value in oil and gas exploration and development. At the same time, studies have shown that the Biot coefficient is related to factors such as rock mineral composition, cement, rock porosity,...

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Application Information

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IPC IPC(8): G06F17/10G01N15/08
CPCG06F17/10G01N15/088
Inventor 林凯贺锡雷
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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