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Method for Determination of Rock Mechanics Parameters of Transversely Isotropic Shale Reservoirs

A technology of transverse isotropy and rock mechanics parameters, applied in the field of petroleum exploration, can solve the problems of high cost, inability to implement, difficult to obtain cores, etc., and achieve the effects of accurate results, convenient X-ray diffraction experiments, and high calculation efficiency.

Active Publication Date: 2015-08-12
CHINA UNIV OF PETROLEUM (BEIJING)
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AI Technical Summary

Problems solved by technology

Although this method is simple in principle and easy to operate, it requires bottom hole cores for measurement, and the cost is high
And because it is difficult to obtain cores for some fracture-vuggy weakly cemented reservoirs, this method cannot be implemented in such reservoirs

Method used

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  • Method for Determination of Rock Mechanics Parameters of Transversely Isotropic Shale Reservoirs
  • Method for Determination of Rock Mechanics Parameters of Transversely Isotropic Shale Reservoirs
  • Method for Determination of Rock Mechanics Parameters of Transversely Isotropic Shale Reservoirs

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Embodiment Construction

[0061] In order to further understand the content of the present invention, the present invention will be described in detail below in conjunction with specific examples.

[0062] Such as figure 1 As shown, a method for determining rock mechanical parameters of transversely isotropic shale reservoirs includes the following steps in sequence:

[0063] (1) Determine the rock mineral composition at a certain well depth through X-ray diffraction experiments, record the acoustic time difference through acoustic logging experiments, and use the acoustic logging data to invert the rock porosity at a certain well depth;

[0064] The X-ray diffractometer used is a MiniFlex II desktop diffractometer, and the cuttings used come from ultra-deep sandy mudstone in a certain area of ​​Xinjiang. Grind the cuttings into powder; dry the powder, stabilize it in the air, and the particle size of the powder is 15 μm; make the powder into whole rock slices, natural slices, ethylene glycol saturate...

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Abstract

The invention discloses a determination method for mechanical parameters of transverse isotropy shale reservoir rocks. The determination method comprises the following steps: carrying out an X-ray diffraction experiment to determine rock mineral constituents of a certain well depth; inverting rock porosity of the certain well depth by utilizing acoustic logging information; determining the stacking density of clay by utilizing the determined rock mineral constituents and the porosity; determining rigidity matrixes of transverse isotropy rocks of shale under a scale 0 by using a closed cycle-correction-identification method; determining the rigidity matrixes of the transverse isotropy rocks of the shale under a scale 1 and a scale 2 by utilizing a pore elastic theory; and substituting the rigidity matrixes into inversion models of Young modulus, poisson ratio and shear modulus and determining the mechanical parameters of the rocks. According to the determination method, the mechanical strength parameters of the rocks are inverted by using the X-ray diffraction experiment, so that the inversion result is accurate on the basis of establishing the experiment; field rock fragments are easy to obtain so that the determination method has the characteristics of time conservation, labor conservation and money conservation in the aspect of experiment operation.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploration and relates to a method for determining rock mechanical parameters, in particular to a method for determining rock mechanical strength parameters of transversely isotropic shale reservoirs by using mineral components. Background technique [0002] In various engineering design, construction, mining, oil exploration and other fields, the determination of rock mechanics parameters is an important basis for formulating drilling, well completion, oil and gas development and construction measures. Especially in the field of drilling, the determination of rock mechanical parameters of transversely isotropic shale reservoirs is more important, which directly affects the reasonable prediction of stress distribution around the wellbore, and further affects the determination of the drilling fluid mud density window. The reasonable determination of rock mechanics parameters will ultimately affe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
Inventor 侯冰陈勉刘铭金衍卢运虎
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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