Methods and apparatus to characterize stock-tank oil during fluid composition analysis
First Claim
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1. A method to characterize a fluid associated with an underground geological formation, the method comprising:
- obtaining a sample comprising the fluid associated with the underground geological formation;
measuring, in a borehole associated with the underground geological formation, an optical property of the fluid, wherein the optical property is measured by a grating spectrometer and filter-array spectrometer;
determining, in the borehole, a stock-tank oil type for the sample associated with the underground geological formation, wherein the stock-tank oil type is determined based on the optical property; and
determining a property of the sample associated with the underground geological formation based on the stock-tank oil type.
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Abstract
Methods and apparatus to characterize stock-tank oil during fluid composition analysis are disclosed. A disclosed example method to characterize a fluid associated with an underground geological formation comprises obtaining a sample of the fluid associated with the underground geological formation, determining, in a borehole associated with the underground geological formation, a stock-tank oil type for the sample of the fluid associated with the underground geological formation, and determining a property of the fluid associated with the underground geological formation based on the stock-tank oil type.
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Citations
25 Claims
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1. A method to characterize a fluid associated with an underground geological formation, the method comprising:
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obtaining a sample comprising the fluid associated with the underground geological formation; measuring, in a borehole associated with the underground geological formation, an optical property of the fluid, wherein the optical property is measured by a grating spectrometer and filter-array spectrometer; determining, in the borehole, a stock-tank oil type for the sample associated with the underground geological formation, wherein the stock-tank oil type is determined based on the optical property; and determining a property of the sample associated with the underground geological formation based on the stock-tank oil type. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus to characterize a fluid associated with an underground geological formation, the apparatus comprising:
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a device to obtain a sample of the fluid associated with the underground geological formation; an optical sensor to measure an optical property of the sample of the fluid; an analyzer to determine a stock-tank oil type for the sample of the fluid based on the optical property; a grating spectrometer; and a filter-array spectrometer. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method comprising:
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transmitting light to a sample of an underground geological formation; measuring an indication of absorption of the transmitted light by the sample; and comparing the measured indication of absorption to two or more absorptions for respective ones of two or more hydrocarbon types to determine a parameter of the sample, wherein the two or more hydrocarbon types include at least a waxy hydrocarbon and a non-waxy hydrocarbon. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification