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Look ahead logging system

A technology of drilling and downhole tools, which is applied in the direction of electric/magnetic detection and electromagnetic wave detection for well logging records, and can solve problems such as the limitation of the ability to obtain information

Inactive Publication Date: 2010-12-29
PRAD RES & DEV LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

however, existing logging systems may be limited in their ability to obtain information from some areas of the subsurface environment (e.g., the area ahead of or ahead of the logging system)

Method used

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Embodiment Construction

[0048] In the following description, numerous details are set forth in order to provide an understanding of the present invention. However, it will be understood by those skilled in the art that the invention may be practiced without these details and that various changes and modifications may be made from the described embodiments.

[0049] Embodiments of the present invention relate to resistivity arrays with improved properties. Some embodiments of the invention relate to methods of using these logging tools in formation evaluation. Embodiments of the present invention may allow inversion of more complex formation models (ie, formation models with more parameters) and / or may improve the robustness (reduce uncertainty) of inversion of resistance measurements. Some embodiments of the invention may increase the flexibility of formation resistivity evaluation by providing more measurements, each of which may have different responses to different formation models.

[0050]Some...

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PUM

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Abstract

A technique utilizes the acquisition of data from desired subterranean regions via a logging system. The logging system is constructed for use in a wellbore and comprises a transmitter module having a transmitter antenna. Additionally, the logging system utilizes a receiver module spaced from the transmitter module and having a receiver antenna. The transmitter antenna and the receiver antenna are oriented to enable sensitivity in desired directions, such as ahead of the logging system.

Description

Background technique [0001] In various well-related operations, well logging is performed to obtain information about the subsurface environment in which the borehole is formed. Well logging tools are deployed downhole within the borehole with various sensors to obtain data that helps to understand and use the well. In some applications, logging-while-drilling techniques are used to obtain data while drilling a wellbore. However, existing logging systems may be limited in their ability to obtain information from some areas of the subsurface environment (eg, the area in front of or in front of the logging system). Contents of the invention [0002] In summary, the present invention provides a system and method for acquiring data from a desired subsurface region through a logging system. A logging system is configured for use in a borehole and uses a transmitter module with a transmitter antenna. Additionally, the logging system includes a receiver module having a receiver ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/30
CPCG01V3/30G01V3/28G01V3/18
Inventor 吉恩·赛杜克斯以马利·勒让德雷扎·泰赫里安
Owner PRAD RES & DEV LTD
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