A Saturation Determination Method Based on Multispectral Pore Structure Analysis

A pore structure and saturation technology, applied in the field of saturation determination based on multispectral pore structure analysis, can solve problems such as not being unique, achieve high application value, and broaden the application range and depth

Active Publication Date: 2011-11-30
PETROCHINA CO LTD
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Problems solved by technology

However, with the deepening of research, more core experiments of volcanic rock reservoirs have been completed. After in-depth analysis, it is found that even if the lithology is the same, the relationship between porosity and el

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  • A Saturation Determination Method Based on Multispectral Pore Structure Analysis
  • A Saturation Determination Method Based on Multispectral Pore Structure Analysis
  • A Saturation Determination Method Based on Multispectral Pore Structure Analysis

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Embodiment Construction

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] In recent years, the introduction of some new experimental techniques such as CT has made it possible to obtain fine information on the three-dimensional pore structure of rocks, and have a deeper understanding of the correspondence between rock pore structure and electrical properties. In addition, some new logging technologies that c...

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Abstract

The invention discloses a multispectral pore structural analysis-based saturation determining method which comprises the following steps of: carrying out micro CT (Computer Tomography) scanning and imaging on a rock core of a typical rock sample; quantitatively extracting a pore radius distribution spectrum of the typical sample in a three-dimensional space; acquiring the pore structure characteristic of the typical rock sample according to a nuclear-magnetism T-2 spectrum of the typical rock sample; generating a porosity distribution spectrum of the typical rock sample according to electric imaging log data of the typical rock sample; jointly determining the pore structure type of the typical rock sample according to the pore radius distribution spectrum, the nuclear-magnetism T-2 spectrum and the electric imaging porosity distribution spectrum; and determining a saturation model corresponding to the typical rock sample according to the pore structure type of the typical rock sample and determining the saturation of an oil-gas storage and collection layer in which the typical rock sample is positioned according to the saturation model.

Description

technical field [0001] Aiming at complex reservoirs such as volcanic rock, carbonate rock, and low-porosity and low-permeability clastic rock, the present invention proposes a method for determining saturation based on multispectral pore structure analysis. Background technique [0002] Quantitative calculation of formation oil saturation is the basic task of logging interpretation and evaluation, and it is also the core of quantitative evaluation of oil and gas reservoirs. At present, the saturation evaluation based on resistivity is still the most used in logging interpretation. Although other logging techniques such as nuclear magnetic resonance and array induction can also provide information related to reservoir saturation, they are limited by these logging techniques. The cost, multi-solution, applicability and other conditions of the application of well technology are limited, and the actual application in the oil field is seldom. [0003] The core of oil and gas sat...

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Application Information

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IPC IPC(8): G01N15/08G01V3/14
Inventor 李宁王克文武宏亮冯庆付李庆峰董丽欣
Owner PETROCHINA CO LTD
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