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公开(公告)号：US10954764B2
公开(公告)日：2021-03-23
申请号：US16291789
申请日：2019-03-04
Applicant: Saudi Arabian Oil Company
Inventor： Subhash C. Ayirala , Ammar AlShehri , Sultan Enezi , Ali Al-Yousef
Abstract: Provided are oil recovery compositions and processes for enhancing oil recovery from a carbonate reservoir. A process for enhancing oil recovery includes injecting a first slug of an aqueous solution having a salinity in the range of about 5,000 ppm TDS to about 7,000 ppm TDS and sulfate ions in the range of about 500 ppm to about 5000 ppm. After injection of the first slug, the process includes injecting a second slug of an aqueous solution having a salinity in the range of about 5,000 ppm TDS to about 7,000 ppm TDS, calcium ion concentrations in the range of about 100 ppm to about 1000 ppm, and magnesium ions in the range of about 200 ppm to about 2000 ppm. A third slug of seawater or produce water may then be injected as chase water.
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公开(公告)号：US12286866B2
公开(公告)日：2025-04-29
申请号：US17819531
申请日：2022-08-12
Applicant: SAUDI ARABIAN OIL COMPANY
Inventor： Zuhair AlYousif , Subhash C. Ayirala , Muhammad M. Almajid , Moataz Abu AlSaud
Abstract: Described is a method for enhanced carbon dioxide (CO2) sequestration in geological formations. The method includes dissolving CO2 in a low salinity fluid to form a CO2-brine solution. The low salinity fluid includes sodium (Na+) ions and sulfate (SO42−) ions. The CO2-brine solution is injected into a geological formation, and the CO2 reacts with the geological formation to produce solid carbonate minerals for CO2 sequestration.
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公开(公告)号：US20240426734A1
公开(公告)日：2024-12-26
申请号：US18338114
申请日：2023-06-20
Applicant: SAUDI ARABIAN OIL COMPANY
Inventor： Dong Kyu Cha , Ghaida Aljuhani , Subhash C. Ayirala , Abdulaziz S. Qasim , Ali Abdallah Al-Yousef
Abstract: A device includes a microfluidic cell including a substrate and metal electrodes disposed on the substrate, a glass window disposed over the substrate, a current-voltage analyzer connected to the metal electrodes, and an inlet and an outlet in fluid communication with the microfluidic cell. A method of fabricating the device includes photolithographically exposing site for the metal electrodes utilizing a photoresist, depositing the metal electrodes on the substrate, and photolithographically patterning the substrate. A method of measuring pore throat size changes and oil mobilization includes connecting a current-voltage analyzer to a microfluidic cell and sweeping a current through the microfluidic cell via the current-voltage analyzer.
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Patent Agency Ranking
公开(公告)号：US12060782B2
公开(公告)日：2024-08-13
申请号：US17990537
申请日：2022-11-18
Applicant: SAUDI ARABIAN OIL COMPANY
Inventor： Ghaida Al Juhani , Subhash C. Ayirala , Abdulaziz S. Al-Qasim , Deena Tayyib
CPC classification number: E21B43/2401 , E21B43/25
Abstract: A system for electrical treatment in a reservoir with gas wells is disclosed. The system includes a first well in the reservoir configured to act as an electrode, the reservoir having a plurality of pore spaces saturated by water, and a second well in the reservoir configured to act as a second electrode hydraulically connected to the first well. A power unit is connected to the first and second wells by a cable configured to emit an electric current to the first well and the second well into the reservoir. The electric current enlarges the plurality of pore spaces in the reservoir, facilitating a production of gas from the water. A transformer is connected to the power unit by the cable, the transformer being configured to step down a voltage from a power supply to the power unit. The power supply is connected to the transformer by the cable.
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公开(公告)号：US20240166934A1
公开(公告)日：2024-05-23
申请号：US18056556
申请日：2022-11-17
Applicant: SAUDI ARABIAN OIL COMPANY
Inventor： Jothibasu Ramasamy , Subhash C. Ayirala , Mohammed K. Arfaj , Salah Hamad Al-Saleh
CPC classification number: C09K8/05 , C09K8/08 , C09K8/206 , C09K2208/18
Abstract: Described is a wastewater-based drilling fluid. The wastewater-based drilling fluid consists of about 40% to 60% by volume of a high salinity wastewater discharge. The wastewater-based drilling fluid also includes calcium carbonate as a bridging agent and barite as a weighting agent. The wastewater-based drilling fluid possesses a set of rheological properties and filtration control properties characteristic of a water-based drilling fluid.
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公开(公告)号：US20230408919A1
公开(公告)日：2023-12-21
申请号：US18335603
申请日：2023-06-15
Inventor： Dong Kyu Cha , Abdullah Abdulaziz AlOmier , Subhash C. Ayirala , Mohammed Badri Al-Otaibi , Ali Abdallah Al-Yousef , Hussein Hoteit
CPC classification number: G03F7/039 , G03F7/2004 , G03F7/038 , G09B23/40 , G03F7/0752 , G03F7/38 , G03F7/162
Abstract: A method for manufacturing a micromodel with a mixed wettability surface representing a hydrocarbon reservoir is disclosed. The method includes coating a top surface of a hydrophilic substrate with photoresist, covering a top of the photoresist with a photomask, exposing the covered top of the photoresist to UV light that changes a chemical property of a region of the photoresist corresponding to a pattern of the photomask, removing the photomask, removing the region of the photoresist corresponding to the pattern of the photomask based on the chemical property of the region, depositing a hydrophobic thin-film on top of the hydrophilic substrate, and removing a remaining photoresist covered with the thin-film, such that the surface of the hydrophilic substrate is patterned with both a region covered with the hydrophobic thin-film and an uncovered region of the hydrophilic substrate, creating a mixed wettability surface on the hydrophilic substrate that represents the micromodel.
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公开(公告)号：US11788392B2
公开(公告)日：2023-10-17
申请号：US17232838
申请日：2021-04-16
Applicant: SAUDI ARABIAN OIL COMPANY
Inventor： Amani O. Alghamdi , Subhash C. Ayirala , Ali Abdallah Alyousef
CPC classification number: E21B43/20 , B01D61/027 , B01D61/04 , C02F1/442 , C02F1/4618 , C02F1/46109 , E21B41/00 , B01D2311/04 , B01D2311/2684 , C02F2001/46133 , C02F2201/005 , C02F2201/4611 , C02F2201/4617 , C02F2201/46115 , C02F2201/46145
Abstract: A method for selectively optimizing water chemistry within a wellbore may include positioning a system tubing in the wellbore. The system tubing may include an electrochemical cell, a first chamber, and a second chamber. The method may also include injecting a fluid into the electrochemical cell and directing an electrical current into the electrochemical cell wherein the fluid separates by charge into a first fluid and a second fluid. The method may also include passing the first fluid into the first chamber and the second fluid into the second chamber. Also, the method may include rotating the system tubing, wherein the first fluid flows from the first chamber to the wellbore through a first radial conduit and the second fluid flows from the second chamber to the wellbore through a second radial conduit.
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公开(公告)号：US20220008920A1
公开(公告)日：2022-01-13
申请号：US16924817
申请日：2020-07-09
Applicant: SAUDI ARABIAN OIL COMPANY
Inventor： Dong kyu Cha , Subhash C. Ayirala , Ahmed Gmira , Ali Abdallah Al-Yousef
Abstract: A method includes flowing an inlet solution having an inlet salinity and an inlet ion concentration from an inlet to a membrane filtration system, dynamically adjusting the salinity or ion concentration of the inlet solution in situ as the inlet solution flows to an inlet of a microfluidic cell, and determining a wettability alteration in situ while dynamically adjusting the salinity or ion concentration of the inlet solution. A system includes a fluid inlet, a microfluidic cell fluidly coupled to the fluid inlet, the microfluidic cell having a surface representative of a reservoir rock, and a membrane filtration system coupled between the microfluidic cell and the fluid inlet.
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