Methods for quantitative lithological and mineralogical evaluation of subsurface formations

A mineral and lithological technology, applied in the field of determining the overall lithology, specific lithology and mineral properties of the formation, and can solve problems such as wrong lithological characteristics

Inactive Publication Date: 2009-08-05
BAKER HUGHES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this is very limited because errors in determining minerality, such as those that can occur during the transformation of major elements into more general oxide forms, can translate into very wrong lithological characteristics

Method used

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  • Methods for quantitative lithological and mineralogical evaluation of subsurface formations
  • Methods for quantitative lithological and mineralogical evaluation of subsurface formations
  • Methods for quantitative lithological and mineralogical evaluation of subsurface formations

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Embodiment Construction

[0037] The following presents one or more illustrative embodiments incorporating the inventions disclosed herein. In the interest of clarity, not all features that are actually implemented are described or shown in this application. It should be understood that during the development of an actual embodiment incorporating the present invention, various implementation-specific decisions must be made to achieve the developer's objectives, such as compliance with system-related, business-related, government-related and other constraints which Varies with implementation and time. While a developer's efforts might be complex and time-consuming, such efforts would nonetheless be within the routine of one of ordinary skill in the art having the benefit of this disclosure.

[0038] In summary, applicants have created processes and methods for determining the lithology and mineralogy of subsurface formations surrounding wellbores.

[0039] element input

[0040] figure 1 Illustrated...

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Abstract

Methods and processes for determining the lithology as well as the mineralogy are described. According to the methods and processes, well log data measurements from neutron spectroscopy applications and associated tool response parameters are solved using an artificial intelligence system, such as an expert system, which in turn generates an appropriate discriminator and/or compositional model that estimates both general and specific lithology as well as the mineralogy constraints of the subterranean formation being analyzed. The methods exhibit good elemental correlation between conventional methods of lithology and mineralogy determination, and can provide numerous output data, including grain density and porosity data within zones of the formation.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Patent Application Serial No. 60 / 793,477, filed April 19, 2006, and U.S. Provisional Patent Application Serial No. 60 / 817,226, filed June 28, 2006, both of which The contents of this application are hereby incorporated by reference. technical field [0003] The present disclosure relates generally to methods for determining formation lithology and mineralogy, and more particularly to methods for utilizing expert systems and well log data to determine formation general lithology, specific lithology and mineralogy. Background technique [0004] There has long been a need for hollow core logging tools and methods that can provide measurements of geological formation lithology and mineralogy in selected directions, provide mineralogy and lithologic and provide all of these measurements with high vertical and lateral resolution. Quantitative information about reservo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V5/04
Inventor D·J·雅各比J·M·朗古
Owner BAKER HUGHES INC
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