Petrophysical modeling method and system

A technology of rock physics modeling and rock physics model, applied in seismic signal processing and other directions, can solve the problem of not considering the influence of seismic wave velocity and so on

Active Publication Date: 2017-01-11
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] For rock physical modeling methods such as KT, DEM, SCA, and XuWhite, only the influence of the aspect ratio and total porosity of pores on the seismic wave velocity and density is considered, and the influence of the size of a single microscopic pore on the seismic wave velocity is not considered. This disclosure proposes a petrophysical modeling method and system that can correctly describe the influence of reservoir microscopic pore structure on seismic wave velocity by considering the influence of pore aspect ratio and main scale on seismic wave velocity

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  • Petrophysical modeling method and system
  • Petrophysical modeling method and system

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Embodiment 1

[0045] figure 1A flow chart of a petrophysical modeling method according to an embodiment of the present invention is shown, the method includes:

[0046] a. Obtain the rock mineral composition and content, and the relevant information of multiple pores in the rock, and equivalent skeleton modulus according to the composition and content;

[0047] b. Correct the KT petrophysical model according to the relevant information of multiple pores to obtain the corrected model;

[0048] c. Calculate the dry rock skeleton modulus based on the revised model and the equivalent skeleton modulus;

[0049] d. Execute fluid replacement, obtain the P-wave velocity, S-wave velocity and density of the saturated fluid porous medium, and complete the modeling.

[0050] In this embodiment, by correcting the KT rock physics model, a rock physics model modeling method and system that microscopically considers the influence of the scale (porosity) and aspect ratio of each pore on the seismic wave v...

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Abstract

The present invention relates to a petrophysical modeling method and a system thereof. The method comprises the steps of: a. obtaining the rock mineral composition and content according to a composition and content equivalent skeleton modulus, and obtaining related information of a plurality of pores in the rock; b. modifying a KT rock physical model according to the relevant information of the multiple pores to obtain a modified model; c. calculating the dry rock skeleton modulus based on the modified model and the equivalent skeleton modulus; and d. performing fluid replacement to obtain saturated fluid porous media P-wave velocities, shear wave velocities and densities, in order to complete modeling. The modified KT model taking the size of pores into account describes the influence of the pore transverse and longitudinal ratio and the pore scale on the seismic wave velocity. Under the same porosity conditions, the P-wave velocity and the shear wave velocity increase along with the increase of the pore scale, and decrease along with the decrease of the transverse and longitudinal ratio.

Description

technical field [0001] The present invention relates to the technical field of geophysics, and more specifically, to a petrophysical modeling method and system. Background technique [0002] Petrophysical modeling is to establish the relationship between reservoir parameters (lithology, porosity, saturation, mineral composition and pore geometry, etc.) and reservoir elastic parameters (p-wave velocity, shear-wave velocity and density). Petrophysical modeling is the basis of quantitative reservoir prediction and a bridge between seismic data and reservoir parameter prediction. At present, rock physical modeling methods such as KT, DEM, SCA, and XuWhite, which are widely used in the field of oil and gas geophysical exploration, have comprehensively considered the mineral component content, lithology, porosity, and fluid saturation of reservoir rocks. and density effects. Some recent petrophysical test results show that the pore geometry of rocks also affects the compressiona...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
Inventor 陈天胜刘炯刘春园刘韬张珺魏修成季玉新
Owner CHINA PETROLEUM & CHEM CORP
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