ESTIMATING AND DISPLAYING MOLECULAR SIZE INFORMATION OF A SUBSTANCE
First Claim
1. A method comprising:
- determining a mean chain length scale on a nuclear magnetic resonance (NMR) map of molecules within a substance; and
generating a size estimate of the molecules within the substance using the mean chain-length scale and the NMR map.
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Abstract
Estimating and displaying information about the size of molecules within a substance from nuclear magnetic resonance (NMR) maps and/or logs. Methods include utilizing a relationship between the molecular size (e.g., mean chain length), and either a moment of diffusion or a relaxation distribution, to create a scale on a two-dimensional map. In one case, applying the relationship between the molecular size, and either a moment of diffusion or a relaxation distribution, to one-dimensional diffusion or relaxation distributions for the purpose of estimating the mean chain length of molecules within the substance. In another case, a method includes determining mean chain lengths of molecules within a substance and providing a one-dimensional NMR log showing the mean chain lengths at a plurality of depths. In some cases, the NMR log includes actuatable regions for examining two-dimensional NMR maps or chain length distributions of the substance corresponding with distinct depths of the substance.
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Citations
28 Claims
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1. A method comprising:
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determining a mean chain length scale on a nuclear magnetic resonance (NMR) map of molecules within a substance; and generating a size estimate of the molecules within the substance using the mean chain-length scale and the NMR map. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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determining a molecular size of molecules within a substance based upon nuclear magnetic resonance (NMR) signals for the substance in-situ; generating a plot of the molecular size of the molecules within the substance as a function of a depth of the substance; and providing the plot for display. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for determining a characteristic of a substance in-situ, the method comprising:
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obtaining nuclear magnetic resonance (NMR) signals about the substance; calculating a mean chain-length of molecules within the substance based upon the NMR signals; and providing a one-dimensional (1D) nuclear magnetic resonance (NMR) log representing a calculated mean chain length of the molecules within the substance at a plurality of depths of the substance, and wherein the one-dimensional NMR log includes an actuatable region at each of the plurality of depths for providing at least one of a two-dimensional (2D) NMR map of the substance or a chain length distribution of the substance at the each of the plurality of depths. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification