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Natural crack identification method and system based on micro-electrode logging data

A technology of natural fractures and logging data, which is applied in the field of natural fracture identification methods and systems, to achieve the effect of reliable data base, reducing uncertain factors and improving accuracy

Active Publication Date: 2018-03-30
北京旭日昌盛科技有限公司
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Problems solved by technology

At present, the mainstream method of using conventional logging to identify fractures is to use conventional logging, acoustic logging, lateral logging, and induction logging to identify fractures. The above logging series can only qualitatively identify the fracture development zone macroscopically, and there are great limitations in the identification of a single fracture

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  • Natural crack identification method and system based on micro-electrode logging data
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  • Natural crack identification method and system based on micro-electrode logging data

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Embodiment Construction

[0028] The present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the invention are shown in the drawings, it should be understood that the invention 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 invention to those skilled in the art.

[0029] figure 1 A flowchart showing the steps of the method for identifying natural fractures based on microelectrode logging data according to the present invention.

[0030] In this embodiment, the method for identifying natural fractures based on microelectrode logging data according to the present invention may include: step 101, determining the matrix resistivity characteristics of the fracture-free formation; step 102, according to the matrix resistivity characteristics of the f...

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Abstract

The invention discloses a natural crack identification method and system based on micro-electrode logging data. The method comprises a step of determining substrate resistivity characteristics of a crackless formation, a step of obtaining resistivity characteristics of a cracked formation and determining resistivity response characteristics of the cracked formation, a micro-electrode logging resistivity crack identification threshold, a micropotential and a microgradient crack resistivity differential threshold, a step of carrying out flex point analysis on a micro-electrode logging resistivity curve, obtaining micro-electrode logging resistivity flex point data, and extracting a depth position of crack development; and a step of identifying a crack according to the substrate resistivity characteristics of the crackless formation, the micro-electrode logging resistivity crack identification threshold, the micropotential, the microgradient crack resistivity differential threshold and the micro-electrode logging resistivity flex point data and calculating a logging response index of the crack. According to the method and the system, the recognition and evaluation of a single crack are achieved, the uncertainty factors of a traditional method are reduced, the precision is improved, and a reliable data basis is provided for the three-dimensional crack modeling of a cracked oil andgas reservoir.

Description

technical field [0001] The invention relates to the fields of geophysical exploration and oilfield development, and more specifically, to a method and system for identifying natural fractures based on microelectrode logging data. Background technique [0002] Fractured reservoirs are often encountered in oil and gas exploration and development. How to effectively identify natural fractures is of great significance for the rational and efficient development of such reservoirs. At present, the mainstream method of using conventional logging to identify fractures is to use conventional logging, acoustic logging, lateral logging, and induction logging to identify fractures. Influenced by the above logging series, the fracture development zone can only be qualitatively identified macroscopically, and the identification of a single fracture has great limitations. The invention provides a method for identifying the development law of natural fractures in formations by using microe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/18
CPCG01V3/18
Inventor 谯勇周旭煌
Owner 北京旭日昌盛科技有限公司
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