Method for calculating fracture description parameter quantitatively

A technology of parameters and fractures, which is applied in the field of quantification of fracture rock physics models to realize the inversion and calculation of fracture description parameters, which can solve the problems of fractured oil and gas reservoirs that cannot be fundamentally solved, the difficulty of interpretation, and the heterogeneity of reservoir structure Strong and other problems, to achieve the effect of improving physical property description parameters, good model robustness, and stable algorithm performance

Active Publication Date: 2017-09-26
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, due to the complexity of the distribution of fractures, the complex heterogeneity of the reservoir structure, and the difficulty of interpretation, the problem of fractured oil and gas reservoirs cannot be solved fundamentally. It is difficult to determine these parameters quantitatively.

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  • Method for calculating fracture description parameter quantitatively
  • Method for calculating fracture description parameter quantitatively
  • Method for calculating fracture description parameter quantitatively

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[0048]Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0049] The invention is used for extracting fracture physical property description parameters such as fracture density and fracture porosity from well logging, geological and seismic information. The statistical petrophysical model is used to establish the functional relationship between the fracture physical property description parameters and the anisotropy parameters. The anisotropic parameters are further inverted to obtain fracture dens...

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Abstract

The invention provides a method for calculating a fracture description parameter. The method of the invention aims to obtain a fracture development strength body having relatively stable anisotropy medium characteristics based on an early stage pre-stack fracture detection technology, using a Bayes classification method through establishing a rock physic model of the fracture to expand a fracture intensity and a fracture porosity which are obtained through well logging to development bodies of fracture intensity and fracture porosity of a whole working area in order to provide accurate fracture prediction result to comprehensive modeling and spatial distribution of a fracture type reservoir which are carried in a later stage. The method for calculating the fracture description parameter quantitatively overcomes problems that a regular rock physical parameter inversion method is completely based on a statistics hypothesis and performs black box inversion. Besides, the fracture physical parameter inversion is performed on the basis of practical data of a carbonate rock reservoir in western China, and has achieved a satisfied result.

Description

technical field [0001] The invention belongs to petroleum geophysical exploration technology, in particular to a method for realizing inversion and calculation of fracture description parameters based on quantification of fracture rock physics models. Background technique [0002] At present, more than half of the world's oil and gas are produced from natural fractured oil and gas reservoirs. In my country, the distribution of fractured oil and gas reservoirs is also very wide, occupying a very important position in my country's oil and gas production. However, due to the low porosity, strong heterogeneity and complex distribution of fractures, fractured oil and gas reservoirs are essentially different from porous oil and gas reservoirs, making the development of fractured oil and gas reservoirs a recognized problem in the world petroleum industry today. A more comprehensive and accurate understanding and positioning of the distribution, development intensity, density and g...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30G01V1/28
CPCG01V1/282G01V1/306G01V2210/6169G01V2210/624
Inventor 梁志强胡华锋唐金良周单
Owner CHINA PETROLEUM & CHEM CORP
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