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    ENHANCED RECOVERY METHOD FOR STRATIFIED FRACTURED RESERVOIRS
    11.
    发明公开
    ENHANCED RECOVERY METHOD FOR STRATIFIED FRACTURED RESERVOIRS 审中-公开

    公开(公告)号：US20230258065A1

    公开(公告)日：2023-08-17

    申请号：US17651538

    申请日：2022-02-17

    Applicant: SAUDI ARABIAN OIL COMPANY

    Inventor： Abdulaziz S. Al-Qasim ,  Subhash C. Ayirala ,  Dong Kyu Cha

    IPC: E21B43/267 ,  E21B43/00 ,  E21B43/14

    CPC classification number: E21B43/267 ,  E21B43/003 ,  E21B43/14

    Abstract: A method for enhancing productivity of a stratified subterranean wellbore includes introducing a mixture including water and a first set of nanoparticles reactive to high frequency acoustic waves having a size ranging from about 10 to 100 nm to a first target zone, located in a high permeability layer of the stratified subterranean wellbore. A first stimulation including acoustic waves having a frequency range of 1 kHz to 10 kHz is provided to the first set of nanoparticles to promote reacting. Then, a mixture including water and a second set of nanoparticles having a size ranging from about 1 to 10 nm is introduced to a second target zone, located in a medium permeability layer of the stratified subterranean wellbore. A second stimulation including acoustic waves having a frequency range of 100 Hz to 1 kHz is provided to the second set of nanoparticles to promote reacting.

    Manganese-assisted waterflooding processes for enhanced oil recovery in carbonate formations
    13.
    发明授权
    Manganese-assisted waterflooding processes for enhanced oil recovery in carbonate formations 有权

    公开(公告)号：US11384277B2

    公开(公告)日：2022-07-12

    申请号：US17318338

    申请日：2021-05-12

    Applicant: SAUDI ARABIAN OIL COMPANY

    Inventor： Amani O. Alghamdi ,  Subhash C. Ayirala ,  Mohammed Badri Alotaibi ,  Sultan M. Enezi ,  Ali Abdallah Alyousef

    IPC: E21B43/20 ,  C09K8/58

    Abstract: Method for enhancing oil recovery in a hydrocarbon-containing carbonate reservoir including: injecting a slug of an oil recovery solution into the carbonate reservoir such that the wettability of a rock surface of the hydrocarbon-containing reservoir is altered toward more water-wet; and injecting a slug of a displacing fluid into the hydrocarbon-containing carbonate reservoir formation after injecting the slug of the oil recovery solution. The oil recovery solution comprising: a manganese-bearing aqueous solution having manganese ions and one or more major ions. The aqueous saline solution having a concentration of manganese ions between 100 and 1,000 ppm TDS and a concentration of major ions that is equivalent to the concentration of major ions in seawater as it is found in nature. The one or more major ions can include: sodium ion, magnesium ion, calcium ion, chlorine ion, sulfate ion, bicarbonate ion, and combinations of the same.

    Tailored Injection Water Slug Designs for Enhanced Oil Recovery in Carbonates
    14.
    发明申请
    Tailored Injection Water Slug Designs for Enhanced Oil Recovery in Carbonates 审中-公开

    公开(公告)号：US20200284130A1

    公开(公告)日：2020-09-10

    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

    IPC: E21B43/20 ,  C09K8/58

    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.

    METHOD OF ROBUST SURFACTANT SCREENING FOR FOAM APPLICATIONS
    15.
    发明申请
    METHOD OF ROBUST SURFACTANT SCREENING FOR FOAM APPLICATIONS 有权

    公开(公告)号：US20250044207A1

    公开(公告)日：2025-02-06

    申请号：US18362717

    申请日：2023-07-31

    Applicant: SAUDI ARABIAN OIL COMPANY

    Inventor： Muhammad M. Almajid ,  Zuhair Alyousif ,  Subhash C. Ayirala ,  Othman Alswaie

    IPC: G01N13/02

    Abstract: Screening multiple surfactants is performed by a screening method including passing foam compositions comprising a surfactant through a porous media while measuring pressure drop across the porous media until a first steady state pressure drop is achieved. Magnitude and frequency in oscillations of the first steady state pressure are measured. A gas is injected through the porous media while measuring the pressure drop across the porous media until a second steady state pressure drop is achieved. Magnitude and frequency in oscillations of the second steady state pressure drop are measured. Foam stability is determined based on the first steady state pressure drop, second steady state pressure drop, and magnitude and frequency of oscillations during the first and second steady states. Secondary oil recovery may include injecting a foam composition into an oil-containing reservoir, wherein the foam composition is based on results of the screening and properties of the oil-containing reservoir.

    ELECTRICAL TREATMENT TO REVIVE DEAD GAS WELLS DUE TO WATER BLOCKAGE
    16.
    发明公开
    ELECTRICAL TREATMENT TO REVIVE DEAD GAS WELLS DUE TO WATER BLOCKAGE 审中-公开

    公开(公告)号：US20240167371A1

    公开(公告)日：2024-05-23

    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

    IPC: E21B43/25

    CPC classification number: 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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