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公开(公告)号：US20210372955A1
公开(公告)日：2021-12-02
申请号：US17402660
申请日：2021-08-16
Inventor： Mahmoud ELSAYED , Ammar EL-HUSSEINY , Mohamed MAHMOUD , Karem AL-GARADI
Abstract: A method for predicting formation permeability by measuring diffusional tortuosity in several directions by pulse gradient NMR. The method comprises evaluating an anisotropic diffusion coefficient by pulsed gradient NMR, determining diffusional tortuosity from the restricted diffusion data, supplementing the NMR results with resistivity and sonic logging data, measuring anisotropic tortuosity and porosity by resistivity and sonic data and combining all components in a single fitting model. The 11-coefficient model is trained to recognize the true values of permeability by comparing the real oil permeabilities measured in a library of oil-carrying rock cores with the NMR, resistivity and sonic correlates. The fitting coefficients are extracted by minimizing the discrepancy between the laboratory measured permeabilities and the predicted values combining all rapid logging information components with the agreement-maximizing weights.
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公开(公告)号：US20210372954A1
公开(公告)日：2021-12-02
申请号：US17402659
申请日：2021-08-16
Inventor： Mahmoud ELSAYED , Ammar EL-HUSSEINY , Mohamed MAHMOUD , Karem AL-GARADI
Abstract: A method for predicting formation permeability by measuring diffusional tortuosity in several directions by pulse gradient NMR. The method comprises evaluating an anisotropic diffusion coefficient by pulsed gradient NMR, determining diffusional tortuosity from the restricted diffusion data, supplementing the NMR results with resistivity and sonic logging data, measuring anisotropic tortuosity and porosity by resistivity and sonic data and combining all components in a single fitting model. The 11-coefficient model is trained to recognize the true values of permeability by comparing the real oil permeabilities measured in a library of oil-carrying rock cores with the NMR, resistivity and sonic correlates. The fitting coefficients are extracted by minimizing the discrepancy between the laboratory measured permeabilities and the predicted values combining all rapid logging information components with the agreement-maximizing weights.
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33.发明申请公开(公告)号：US20210285902A1
公开(公告)日：2021-09-16
申请号：US16818467
申请日：2020-03-13
Inventor： Mahmoud ELSAYED , Ammar EL-HUSSEINY , Mohamed MAHMOUD , Karem AL-GARADI
Abstract: A method for predicting formation permeability by measuring diffusional tortuosity in several directions by pulse gradient NMR. The method comprises evaluating an anisotropic diffusion coefficient by pulsed gradient NMR, determining diffusional tortuosity from the restricted diffusion data, supplementing the NMR results with resistivity and sonic logging data, measuring anisotropic tortuosity and porosity by resistivity and sonic data and combining all components in a single fitting model. The 11-coefficient model is trained to recognize the true values of permeability by comparing the real oil permeabilities measured in a library of oil-carrying rock cores with the NMR, resistivity and sonic correlates. The fitting coefficients are extracted by minimizing the discrepancy between the laboratory measured permeabilities and the predicted values combining all rapid logging information components with the agreement-maximizing weights.
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Patent Agency Ranking
公开(公告)号：US20210238998A1
公开(公告)日：2021-08-05
申请号：US16779923
申请日：2020-02-03
Inventor： Mahmoud ELSAYED , Mohamed MAHMOUD , Ammar EL-HUSSEINY , Muhammad Shahzad KAMAL , Karem AL-GARADI
Abstract: A method for assessing an optimal acid injection rate in the process of hydrocarbon formation stimulation. The method comprises evaluating an anisotropic diffusion coefficient by pulsed gradient NMR, introduction of a semi-empirical correction based on comparison of the downhole conditions with the library of laboratory experiments where such corrections were measured, extrapolation of the library data to the real downhole conditions. The improved values of the diffusion coefficients are applied in determining wormhole regime conditions that are optimal in terms of acid consumption per a unit of stimulated yield of the hydrocarbon.
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35.发明申请公开(公告)号：US20210238472A1
公开(公告)日：2021-08-05
申请号：US16777221
申请日：2020-01-30
Inventor： Muhammad Shahzad KAMAL , S.M. Shakil HUSSAIN , Mobeen MURTAZA , Mohamed MAHMOUD
IPC: C09K8/60 , C07C235/10 , C09K8/86
Abstract: Methods of controlling clay swelling and stabilizing subterranean geological formations containing swellable clays (e.g., montmorillonite, bentonite) are described. The methods involve treating the swellable clays with a composition containing an amidoamine-based gemini surfactant. The gemini surfactant has dual chains connected via an alkylene linker, whereby each chain contains a quaternary ammonium head group and an ethoxylated alkyl tail. As examined by linear swelling and free swelling tests, use of the gemini surfactant is effective in reducing swelling of the clays.
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公开(公告)号：US20210122970A1
公开(公告)日：2021-04-29
申请号：US16665729
申请日：2019-10-28
Inventor： Mohamed MAHMOUD , Abdelwahab Ali ZAKI
Abstract: A method of controlling the fracture location, orientation, and reduce the breakdown pressure in multistage fracturing, particularly of unconventional reservoirs. Acid etching can be used to initiate small channels (wormholes) around the horizontal well, followed by the hydraulic fracturing fluid to create the fractures. The fracture orientation can follow the same direction of the etched part of the well and in the same location of the wormholes. The breakdown pressure can be reduced by 5, 10, 15%, or more, e.g., from 2200 to 1800 psi after acid etching which can minimize the pumping requirements at the surface and break the formation with very high breakdown pressure.
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公开(公告)号：US20190270925A1
公开(公告)日：2019-09-05
申请号：US15908957
申请日：2018-03-01
Inventor： Mohamed MAHMOUD , Salaheldin ELKATATNY
Abstract: A method of drilling a subterranean geological formation having a permeability of no more than 0.1 mD with a drilling fluid comprising a continuous phase, a viscosifier, a weighting agent, and sodium silicate, wherein the sodium silicate is present in the drilling fluid at a concentration of 0.01-0.2% by weight, relative to the total weight of the drilling fluid. Various combinations of embodiments of the drilling fluid and the method of drilling the subterranean geological formation are provided.
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38.发明申请公开(公告)号：US20190119561A1
公开(公告)日：2019-04-25
申请号：US16221040
申请日：2018-12-14
Inventor： Mohamed MAHMOUD , Salaheldin Elkatatny , Abdulwahab Zaki Ali
CPC classification number: C09K8/665 , C01F11/462 , C01P2004/61 , C09K8/05 , C09K8/845 , C09K2208/34 , E21B43/26 , E21B43/267
Abstract: A drilling fluid composition that contains micronized barite particles with a particle size in the range of 1 to 5 μm, and also a method of fracturing a subterranean formation using the drilling fluid composition. Various embodiments of the micronized barite particles and the method of making thereof, the drilling fluid composition, and the method of fracturing a subterranean formation are also provided.
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