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Method and apparatus for determining rock physical model

A petrophysical model and rock technology, applied in the field of oil and gas geophysics, can solve the problem of low accuracy of petrophysical models

Active Publication Date: 2018-05-08
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for carbonate reservoirs with complex pore structures and well-developed fractures, it may be difficult to accurately reflect the elastic characteristics of the porous media with complex and diverse pore shapes in the carbonate reservoirs if the existing methods are still used. , which may lead to a lower accuracy of the determined petrophysical model

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  • Method and apparatus for determining rock physical model
  • Method and apparatus for determining rock physical model

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Embodiment Construction

[0063] Embodiments of the present application provide a method and device for determining a petrophysical model.

[0064] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0065] The embodiment of the present application provides a method for determining a petrophysical model. The method of determining a petrophysical model provides property information of rocks in a reservoir of interest.

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Abstract

The embodiment of the application discloses a method and apparatus for determining a rock physical model. The method comprises: according to volume components, densities, and elastic modulus values ofmineral components in property information, elastic modulus and density values of a rock matrix are determined; on the basis of the elastic modulus of the rock matrix and a pore structure parameter in the attribute information, an elastic modulus of a first rock skeleton is determined, wherein the first rock skeleton includes a connection pore and an isolated pore; a stiffness coefficient of thesecond rock skeleton is determined based on the elastic modulus of the first rock skeleton, wherein the second rock skeleton includes a designated fissure and the first rock skeleton; and on the basisof the density and the elastic modulus of the rock matrix as well as the stiffness coefficient of the second rock skeleton, fluid replacement is carried out on the second rock skeleton to obtain a shear wave velocity, a longitudinal wave velocity, and a density of the saturated rock. Therefore, the accuracy of the determined rock physical model is improved.

Description

technical field [0001] The present application relates to the field of oil and gas geophysics, in particular to a method and device for determining a petrophysical model. Background technique [0002] The rock physical model is the basis for extracting parameters such as lithology, porosity and fluid composition from seismic data, and is the basis for studying the relationship between seismic response characteristics and rock elastic parameters, velocity, density and fluid. [0003] At present, the widely used petrophysical modeling methods in the field of oil and gas geophysics are mainly based on the differential equivalent medium model or self-consistent model, and the petrophysical model is determined according to the collected seismic data. Among them, the differential equivalent medium model and the self-consistent model are usually used to describe the elastic characteristics of porous media with a single pore shape. However, for carbonate reservoirs with complex por...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
CPCG01V1/282
Inventor 杨廷强甘利灯孔丽云晏信飞李凌高
Owner PETROCHINA CO LTD
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