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公开(公告)号：US11852576B2
公开(公告)日：2023-12-26
申请号：US17649473
申请日：2022-01-31
Applicant: SAUDI ARABIAN OIL COMPANY
Inventor： Jun Gao , Marwah Mufid AlSinan , Hyung Tae Kwak
CPC classification number: G01N15/088 , E21B49/02 , G01N15/08 , G01N24/081 , G01N33/24 , G01V3/32
Abstract: A method for determining the pore size distribution in a reservoir, including the steps: drilling a core sample out of the reservoir, determining a porosity distribution along the core sample, obtaining T2-distributions at different saturation levels of the core sample with formation brine, performing time domain subtraction on the T2-distributions to obtain T2-distributions at all saturation levels, determining the pore throat size distribution along the core sample, determining first porosities from the T2-distributions that correspond to second porosities of the pore throat size distribution for each saturation level, determining T2-distributions at the first porosities from the T2-distributions, determining pore throat sizes at the second porosities from the pore throat size distributions, plotting the pore throat sizes as function of the relaxation times T2 to obtain the surface relaxation, and determining the pore size distribution of the reservoir.
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公开(公告)号：US11828693B2
公开(公告)日：2023-11-28
申请号：US17650812
申请日：2022-02-11
Applicant: SAUDI ARABIAN OIL COMPANY
Inventor： Jinxun Wang , Jun Gao , Abdulkareem Alsofi
CPC classification number: G01N13/02 , G01N33/24 , G01N2013/0208
Abstract: A method includes saturating a core sample with a hydrocarbon fluid to provide a hydrocarbon-saturated core, placing the core into a first aqueous fluid, applying an external force at increasing magnitude to the hydrocarbon-saturated core to displace a volume of the hydrocarbon fluid in the hydrocarbon-saturated core with the first aqueous fluid at each pressure magnitude, measuring a volume of displaced hydrocarbon fluid at each pressure magnitude, obtaining a first capillary pressure curve, re-saturating the core sample, placing the hydrocarbon-saturated core into a second aqueous fluid having a wettability altering agent, applying an external force at increasing magnitude to displace a volume of the hydrocarbon fluid in the core with the second aqueous fluid at each pressure magnitude, measuring a volume of displaced hydrocarbon fluid at each pressure magnitude, obtaining a second capillary pressure curve, and calculating a contact angle of the second aqueous fluid.
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公开(公告)号：US11821862B2
公开(公告)日：2023-11-21
申请号：US17454707
申请日：2021-11-12
Applicant: SAUDI ARABIAN OIL COMPANY
Inventor： Hyung Tae Kwak , Marwah Mufid AlSinan , Jun Gao
CPC classification number: G01N24/081 , G01R33/50 , G01V3/32
Abstract: A method includes deriving spatial permeability along a core axis by saturating the rock with an aqueous solution, performing T2 NMR on the saturated rock to detect spatial NMR data along the core axis, desaturating the rock, performing T2 NMR on the desaturated rock to detect spatial NMR data along the core axis, determining the spatial cutoff data for the saturated and desaturated rock along the core axis, and analyzing the spatial NMR data. The method further includes deriving spatial permeability along a second core axis by additionally performing T2 NMR on the saturated rock to detect spatial NMR data along a second core axis, performing T2 NMR on the desaturated rock to detect spatial NMR data along a second core axis, and determining the spatial cutoff data for the saturated and desaturated rock along the second core axis.
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公开(公告)号：US20230184072A1
公开(公告)日：2023-06-15
申请号：US17644109
申请日：2021-12-14
Applicant: SAUDI ARABIAN OIL COMPANY
Inventor： Abdulaziz S. Al-Qasim , Marwah M. Alsinan , Jun Gao , Hyung Tae Kwak
CPC classification number: E21B43/166 , E21B47/00 , E21B43/003
Abstract: A method includes providing an injection well extending from a surface into a formation and alternatingly pumping a foam injectant and a gel injectant into the injection well, wherein the foam injectant includes a liquid phase with a surfactant and water and a gas phase and the gel injectant includes a water-soluble polymer and a crosslinker. The foam injectant and the gel injectant are injected at separate times and sequentially.
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公开(公告)号：US10338014B2
公开(公告)日：2019-07-02
申请号：US15661852
申请日：2017-07-27
Applicant: Saudi Arabian Oil Company
Inventor： Ahmad Mubarak Al-Harbi , Hyung Tae Kwak , Jun Gao
Abstract: Methods estimating a property of a porous media include: saturating a sample of the porous media; spinning the sample in a centrifuge with a first end of the sample closer to an axis of rotation of the centrifuge than a second end of the sample; obtaining a first estimate of the first property; saturating the sample of the porous media; spinning the sample in a centrifuge with the second end of the sample closer to the axis of rotation of the centrifuge than the first end of the sample; obtaining a second estimate of the first property; and determining the second property of the porous media based at least in part on the first estimate of the first property and the second estimate of the first property. The first property can be a T2 distribution and the second property can be a T2 cutoff.
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Patent Agency Ranking
公开(公告)号：US20190033238A1
公开(公告)日：2019-01-31
申请号：US15661852
申请日：2017-07-27
Applicant: Saudi Arabian Oil Company
Inventor： Ahmad Mubarak Al-Harbi , Hyung Tae Kwak , Jun Gao
CPC classification number: G01N24/081 , G01N1/34 , G01R33/448 , G01R33/46
Abstract: Methods estimating a property of a porous media include: saturating a sample of the porous media; spinning the sample in a centrifuge with a first end of the sample closer to an axis of rotation of the centrifuge than a second end of the sample; obtaining a first estimate of the first property; saturating the sample of the porous media; spinning the sample in a centrifuge with the second end of the sample closer to the axis of rotation of the centrifuge than the first end of the sample; obtaining a second estimate of the first property; and determining the second property of the porous media based at least in part on the first estimate of the first property and the second estimate of the first property. The first property can be a T2 distribution and the second property can be a T2 cutoff
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7.发明公开公开(公告)号：US20240003839A1
公开(公告)日：2024-01-04
申请号：US18466774
申请日：2023-09-13
Applicant: SAUDI ARABIAN OIL COMPANY
Inventor： Marwah Mufid Alsinan , Hyung Tae Kwak , Jun Gao
CPC classification number: G01N24/081 , G01R33/46 , E21B49/003 , G01N33/24 , E21B2200/20
Abstract: A method may include obtaining first nuclear magnetic resonance (NMR) data for a saturated core sample regarding a geological region of interest. The method may further include obtaining second NMR data for a desaturated core sample regarding the geological region of interest. The method may further include determining a geological model for the geological region of interest using the first NMR data based on the saturated core sample and the second NMR data based on the desaturated core sample.
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8.发明公开公开(公告)号：US20230152253A1
公开(公告)日：2023-05-18
申请号：US17454720
申请日：2021-11-12
Applicant: SAUDI ARABIAN OIL COMPANY
Inventor： Marwah Mufid AlSinan , Hyung Tae Kwak , Jun Gao
CPC classification number: G01N24/081 , G01R33/46 , G01N33/24 , E21B49/003 , E21B2200/20
Abstract: A method may include obtaining first nuclear magnetic resonance (NMR) data for a saturated core sample regarding a geological region of interest. The method may further include determining, using the first NMR data, spatial porosity data based on the saturated core sample. The spatial porosity data may describe various porosity values as a function of a sampling position of the saturated core sample. The method may further include obtaining second NMR data for a desaturated core sample regarding the geological region of interest. The method may further include determining, using the second NMR data, spatial permeability data based on the desaturated core sample. The method may further include determining a geological model for the geological region of interest using the spatial porosity data, the spatial permeability data, and a fitting process.
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公开(公告)号：US20220307998A1
公开(公告)日：2022-09-29
申请号：US17209824
申请日：2021-03-23
Applicant: SAUDI ARABIAN OIL COMPANY
Inventor： Jun Gao , Hyung Tae Kwak , Marwah M. AlSinan
Abstract: A method includes screening heterogeneity of a rock sample using nuclear magnetic resonance testing to determine a composition of the rock sample, drilling at least one smaller rock sample representative of the determined composition, and testing the at least one smaller rock sample with mercury injection capillary pressure to obtain a capillary pressure distribution of the at least one smaller rock sample. The method further includes decomposing a T2 distribution from the nuclear magnetic resonance testing and the capillary pressure distribution using Gaussian fitting to identify multiple pore systems, where the small ends of the Gaussian fitted T2 distribution and the Gaussian fitted capillary pressure distribution are overlapped for at least one of the identified pore systems.
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公开(公告)号：US20210381993A1
公开(公告)日：2021-12-09
申请号：US16894029
申请日：2020-06-05
Applicant: SAUDI ARABIAN OIL COMPANY
Inventor： Jun Gao , Hyung Tae Kwak , Marwah M. Alsinan
Abstract: A method for determining pore size distribution of rocks is provided. Capillary pressure measurements on rock cores are analyzed to determine a pore size distribution, with smaller pores requiring greater capillary pressure to relinquish contained fluid. Large pores with rough surfaces introduce inaccuracies in determining the pore size distribution. Embodiments of the invention correct the rough surface induced inaccuracies by measuring the shift in NMR T2 distribution from full saturation to the current state of desaturation and subtracting the T2 contributions in the desaturated state that have smaller T2 values (i.e., smaller transverse relaxation time) than the smallest T2 values (i.e., shortest transverse relaxation time) in the saturated distribution.
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