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    METHOD AND COMPOSITION FOR SEALING A SUBSURFACE FORMATION
    11.
    发明申请
    METHOD AND COMPOSITION FOR SEALING A SUBSURFACE FORMATION 审中-公开

    公开(公告)号：US20190352556A1

    公开(公告)日：2019-11-21

    申请号：US15981998

    申请日：2018-05-17

    Applicant: Saudi Arabian Oil Company

    Inventor： Rajendra Arunkumar Kalgaonkar ,  Vikrant Wagle

    IPC: C09K8/575 ,  C09K8/57 ,  E21B33/138

    Abstract: A method for plugging and sealing subsurface formations using alkaline nanosilica dispersion and a delayed activation chemistry is disclosed. In accordance with one embodiment of the present disclosure, the method includes introducing a mixture with a first pH into the subsurface formation. The mixture comprises an aqueous solution, an alkaline nanosilica dispersion and a water-insoluble hydrolyzable compound. The method further includes allowing the water-insoluble hydrolyzable compound to hydrolyze in the subsurface formation to form an acid at 70° C. or greater, thereby acidizing the mixture to a reduced second pH and causing the alkaline nanosilica dispersion to gel into a solid and seal the subsurface formation. A composition for sealing a subsurface formation is also disclosed. The composition includes an aqueous mixture including water, an alkaline nanosilica dispersion, and a water-insoluble hydrolyzable compound.

    Pulsed hydraulic fracturing with nanosilica carrier fluid
    12.
    发明授权
    Pulsed hydraulic fracturing with nanosilica carrier fluid 有权

    公开(公告)号：US10113406B1

    公开(公告)日：2018-10-30

    申请号：US15711955

    申请日：2017-09-21

    Applicant: Saudi Arabian Oil Company

    Inventor： Ahmed M. Gomaa ,  Khalid R. Noaimi ,  Ghaithan A. Al-Muntasheri ,  Noor Othman Bagader ,  Rajendra Arunkumar Kalgaonkar ,  Jin Huang

    IPC: E21B43/267 ,  C09K8/46 ,  C09K8/80 ,  C09K8/68 ,  C09K8/66

    Abstract: Fracturing a reservoir includes providing a pad fluid to the reservoir via a wellbore in a well to create fractures in the reservoir, providing a fracturing fluid to the fractures via the wellbore, providing a nanosilica carrier fluid to the fractures via the wellbore, activating the nanosilica particles with an activator to yield a nanosilica gel, and shutting in the wellbore at a wellbore pressure, thereby allowing the nanosilica gel to form proppant pillars in the fractures. The nanosilica carrier fluid includes nanosilica particles, and providing the nanosilica carrier fluid to the fractures comprises pulsing quantities of the nanosilica carrier fluid into a continuous flow of the fracturing fluid or alternately pulsing quantities of the nanosilica carrier fluid and the fracturing fluid. An elapsed time between pulsing the quantities of the nanosilica carrier fluid is between 2 seconds and 10 minutes.

    Determining hydrocarbon production from multiple subterranean formations
    13.
    发明授权
    Determining hydrocarbon production from multiple subterranean formations 有权

    公开(公告)号：US12281572B1

    公开(公告)日：2025-04-22

    申请号：US18479204

    申请日：2023-10-02

    Applicant: Saudi Arabian Oil Company

    Inventor： Qasim Sahu ,  Rajendra Arunkumar Kalgaonkar ,  Vera Solovyeva

    IPC: E21B49/08 ,  E21B47/11

    Abstract: A system and a method for determining hydrocarbon production from multiple subterranean formations. Different nanotag tracers are sequentially injected into subterranean production zones fluidly coupled to a wellbore extending from a surface of the Earth through the subterranean production zones. The respective nanotag tracers are injected into a respective subterranean production zone. The different nanotag tracers and production fluids contained within the subterranean production zones are produced through the wellbore to the surface. A turbidity of the production fluids containing the different nanotag tracers is determined at the surface. A quantity of each of the one or more different nanotag tracers from each of the subterranean production zones in the production fluids is determined. Based on the turbidity of the production fluids and the quantity of the different nanotag tracers, a total oil production rate from the subterranean production zones is determined.

    METHOD TO USE LOSS CIRCULATION MATERIAL COMPOSITION COMPRISING ACIDIC NANOPARTICLE-BASED DISPERSION AND FORMATE BASED ACTIVATOR IN DOWNHOLE CONDITIONS
    14.
    发明申请
    METHOD TO USE LOSS CIRCULATION MATERIAL COMPOSITION COMPRISING ACIDIC NANOPARTICLE-BASED DISPERSION AND FORMATE BASED ACTIVATOR IN DOWNHOLE CONDITIONS 有权

    公开(公告)号：US20250002775A1

    公开(公告)日：2025-01-02

    申请号：US18344743

    申请日：2023-06-29

    Applicant: SAUDI ARABIAN OIL COMPANY

    Inventor： Vikrant Wagle ,  Rajendra Arunkumar Kalgaonkar ,  Abdullah Al-Yami ,  Mohammad Alharthi

    IPC: C09K8/76

    Abstract: A loss circulation material includes an acidic nanosilica dispersion and a formate activator, which may be present in an amount in a range of 1 wt % to 40 wt % of the loss circulation material. A method to control lost circulation in a lost circulation zone in a wellbore includes introducing an acidic nanosilica dispersion into the wellbore, introducing a formate activator into the wellbore, contacting the acidic nanosilica dispersion with the formate activator, thereby forming a loss circulation material composition, and forming a gelled solid from the loss circulation material in the lost circulation zone. A method of controlling lost circulation in a lost circulation zone in a wellbore includes introducing a loss circulation material comprising an acidic nanosilica dispersion and a formate activator into the wellbore, such that they contact the lost circulation zone, and forming a gelled solid from the loss circulation material in the lost circulation zone.

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