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公开(公告)号：US11530999B2
公开(公告)日：2022-12-20
申请号：US16888134
申请日：2020-05-29
发明人： Gabriela Singer , Songhua Chen , Shouxiang Ma
摘要： To separate porosity from surface roughness, length scales for pore size and surface roughness are identified. These length scales are determined from surface roughness measurements and confirmed via NMR pore body calculations and pore size capillary pressure measurements. A filter removes pore contribution to surface roughness measurements and delivers intrinsic surface roughness. Additional filters and methods determine the minimum magnification on which to base surface roughness calculation, based on size of the field of view and where measured surface roughness approaches intrinsic surface roughness as magnification increases but larger magnification increase sampling time and difficulty. Sample irregularities, such as saw marks, are also filtered out or determined to be too large to remove via filter and another area of measurement is located. With the pore corrected quantification of surface roughness, surface relaxivity and pore distribution can be calculated with greater accuracy.
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2.发明公开公开(公告)号：US20230152254A1
公开(公告)日：2023-05-18
申请号：US17695292
申请日：2022-03-15
发明人： Songhua Chen , Gabriela Singer , Wei Shao
CPC分类号： G01N24/081 , G01B21/30 , G01N1/28 , G01N33/24
摘要： A method for measuring a carbon capture and sequestration site. The method may comprise acquiring one or more core samples from a carbon capture and sequestration site, performing a nuclear magnetic resonance (NMR) measurement on the one or more core samples to form a first NMR measurementperforming a surface roughness measurement on the one or more core samples to determine a Rs,before wherein the Rs,before is a surface roughness of the one or more core samples before the one or more core samples are aged in a cell, and determining at least one property of the one or more core samples from at least the first NMR measurement and the Rs,before.
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公开(公告)号：US20230093917A1
公开(公告)日：2023-03-30
申请号：US17531665
申请日：2021-11-19
发明人： Songhua Chen , Gabriela Singer
摘要： An NMR based wettability index determination method for CO2-liquid-solid system for CO2 and liquid phase wettability assessment may comprise acquiring 1H NMR relaxation time measurements, analyzing brine signals for the comparable brine-filled pores from various step, applying a wettability index model constructed with NMR alone and calibrated with another wettability measurement, and applying the wettability index model to interpret wettability of CO2-containing rock system from corresponding NMR measurements.
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公开(公告)号：US20210373106A1
公开(公告)日：2021-12-02
申请号：US16888134
申请日：2020-05-29
发明人： Gabriela Singer , Songhua Chen , Shouxiang Ma
摘要： To separate porosity from surface roughness, length scales for pore size and surface roughness are identified. These length scales are determined from surface roughness measurements and confirmed via NMR pore body calculations and pore size capillary pressure measurements. A filter removes pore contribution to surface roughness measurements and delivers intrinsic surface roughness. Additional filters and methods determine the minimum magnification on which to base surface roughness calculation, based on size of the field of view and where measured surface roughness approaches intrinsic surface roughness as magnification increases but larger magnification increase sampling time and difficulty. Sample irregularities, such as saw marks, are also filtered out or determined to be too large to remove via filter and another area of measurement is located. With the pore corrected quantification of surface roughness, surface relaxivity and pore distribution can be calculated with greater accuracy.
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公开(公告)号：US20230152483A1
公开(公告)日：2023-05-18
申请号：US17455157
申请日：2021-11-16
发明人： Gabriela Singer
摘要： A method comprises determining a Nuclear Magnetic Resonance (NMR) response of a subsurface formation that is based on an NMR response signal that traversed through the subsurface formation and that is result of a magnetic field being emitted into the subsurface formation; determining an Archie cementation exponent for an Archie equation based on the NMR response; and determining a property of the subsurface formation based on the Archie cementation exponent.
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公开(公告)号：US11371827B2
公开(公告)日：2022-06-28
申请号：US16753928
申请日：2019-06-11
发明人： Gabriela Singer , Lilong Li , Songhua Chen
摘要： Measurements of a core sample at scales of measurement that differ by multiple orders of magnitude can be used to calculate a value that fairly represents surface roughness of the core sample. This surface roughness value can be used to determine petrophysical properties of the subsurface formation from which the core sample was obtained. The measurements can be nuclear magnetic resonance (NMR) diffusion-relaxation and gas-adsorption measurements. Surface relaxivities at the different scales are determined from the measurements and a ratio those surface relaxivities can be used to calculate the surface roughness value.
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公开(公告)号：US20210404789A1
公开(公告)日：2021-12-30
申请号：US16753928
申请日：2019-06-11
发明人： Gabriela Singer , Lilong Li , Songhua Chen
摘要： Measurements of a core sample at scales of measurement that differ by multiple orders of magnitude can be used to calculate a value that fairly represents surface roughness of the core sample. This surface roughness value can be used to determine petrophysical properties of the subsurface formation from which the core sample was obtained. The measurements can be nuclear magnetic resonance (NMR) diffusion-relaxation and gas-adsorption measurements. Surface relaxivities at the different scales are determined from the measurements and a ratio those surface relaxivities can be used to calculate the surface roughness value.
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