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System and method for performing simultaneous petrophysical analysis of composition and texture of rock formations

A petrophysical and texturing technology, applied in electrical/magnetic detection for logging records, geophysical measurement, instruments, etc., can solve problems that cannot be easily coordinated and different

Inactive Publication Date: 2015-05-13
CHEVROU USA INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In general, however, they differ from results from TS constructions and cannot be easily reconciled

Method used

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  • System and method for performing simultaneous petrophysical analysis of composition and texture of rock formations
  • System and method for performing simultaneous petrophysical analysis of composition and texture of rock formations
  • System and method for performing simultaneous petrophysical analysis of composition and texture of rock formations

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Embodiment Construction

[0031] In one embodiment, a method for simultaneous petrophysical analysis of the composition and texture of a clastic reservoir sequence is provided. This clastic reservoir sequence is often referred to as a "shale sandbody". Oil or gas may also be present in porous, permeable formations separated by non-reservoir intervals or "shales," and the reservoir sequence of interest, known as "sands," may additionally include sporadic coal- or carbon-bearing Salt-enriched deposits. The term "sand grain" should be interpreted as having primarily quartz material with additional minerals such as feldspar, carbonates, and other impurities.

[0032] The method involves simultaneously determining the solution to a set of wireline response equations for sand and shale and fluids, and the shale is subdivided into three classes (layered, dispersed, and structured) according to classical TS formations. This method enables petrophysical interpretation of clastic reservoirs by simultaneously a...

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Abstract

A system and a computer implemented method for performing simultaneous petrophysical analysis for composition and texture of a rock formation. The method includes inputting a set of response equations for sand, shale and fluid that are present in the rock formation, wherein the shale comprises laminated shale, dispersed shale and structural shale; determining simultaneously a solution of the set of response equations, the solution describing composition and texture of the rock formation; and determining from the solution volume fractions for sand, shale and fluid and a texture of the shale including fractions of laminated shale, dispersed shale and structural shale.

Description

technical field [0001] The present invention relates generally to systems and methods for analyzing rock formations, and in particular to systems and computer-implemented methods for simultaneously analyzing the composition and texture of subterranean rock formations. Background technique [0002] Well logs and core data are routinely used by petrophysicists to analyze the lithology, porosity, and saturation of oil and gas reservoirs. Well logs and core data can deliver results in the form of volumetric fractions of lithology or mineral components, porosity, and relative fractions of fluids present in the formation. However, this volumetric and compositional analysis does not address the geometric distribution of mineral components. [0003] figure 1 Various graphs are depicted showing conventional petrophysical analysis solutions for sand, shale, porosity, and fluid saturation. figure 1 Plotted data are derived from simple log series including resistivity, gamma ray, den...

Claims

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Application Information

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IPC IPC(8): G01V11/00G01V9/00G01V3/18
CPCG01V3/18G01V9/00G01V11/00G01V11/002G06F17/12G01V5/04
Inventor C·H·斯盖尔特
Owner CHEVROU USA INC
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