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    Hot crude gravity drainage (HCGD) for heavy and extra-heavy enhanced oil recovery (EOR)
    2.
    发明授权
    Hot crude gravity drainage (HCGD) for heavy and extra-heavy enhanced oil recovery (EOR) 有权

    公开(公告)号：US12011696B1

    公开(公告)日：2024-06-18

    申请号：US18362126

    申请日：2023-07-31

    申请人： DELFOS CAPITAL LLC

    发明人： Jorge Enrique Echenagucia Cioppa

    IPC分类号： C09K8/592 ,  B01F23/47 ,  E21B43/12 ,  E21B43/38 ,  B01F101/49

    CPC分类号： B01F23/471 ,  C09K8/592 ,  E21B43/121 ,  E21B43/38 ,  B01F2101/49

    摘要： A continuous process for enhanced oil recovery (EOR) to be used in heavy and extra heavy oil wells, where low and/or non-profitable production rates occur is presented. The process is named Hot Crude Gravity Drainage (HCGD), and HCGD may include different components to support the heating of crude produced in the oil well that is later going to be injected at the same volumes as heated crude. The crude may be injected in the sand from which it was produced, in order to continuously supply the required energy to significantly lower the viscosity, which in turn increases mobility in the pores of the producing sand and allows for an increment (e.g., of more than 100%) in production as regards the base or initial production of the oil well, in a 45 consecutive day period. The process unit may be simple, compact, modular and skid mounted.

    Combined catalytic viscosity reducing system and a use of the combined system
    3.
    发明授权
    Combined catalytic viscosity reducing system and a use of the combined system 有权

    公开(公告)号：US11970661B2

    公开(公告)日：2024-04-30

    申请号：US17830368

    申请日：2022-06-02

    申请人： YANGTZE UNIVERSITY

    发明人： Xuemin Yan ,  Peiyue Wu ,  Hao Li ,  Huan Yang ,  Zhaofei Ma ,  Zhongfu Cheng ,  Fei Deng

    IPC分类号： C09K8/584 ,  C09K8/592

    CPC分类号： C09K8/584 ,  C09K8/592

    摘要： A combined catalytic viscosity reducing system includes a catalyst slug, a heat generating system slug, a gas injection slug, and a water-soluble viscosity reducing system slug. The catalyst slug includes 10%-15% of azacarbene iron, 15%-30% of tert-butyl hydroperoxide, 2%-5% of phosphoric acid, 2%-5% of hydrogen donor, and 0.5%-1% of emulsifier agent, and the others are solvent. The heat generating system slug includes 10%-30% of NaNO2, 8%-25% of NH4Cl, and 3%-10% of acid initiator, and the others are water, totaling 100%. The water-soluble viscosity reducing system slug, according to mass percentage, includes 0.2%-0.5% of surfactant and 2%-10% of alkali, and the others are water. The combined catalytic viscosity reducing system can effectively reduce viscosity without injecting steam, and the viscosity reduction rate can reach 96.5%.

    COMBINED CATALYTIC VISCOSITY REDUCING SYSTEM AND A USE OF THE COMBINED SYSTEM
    6.
    发明申请
    COMBINED CATALYTIC VISCOSITY REDUCING SYSTEM AND A USE OF THE COMBINED SYSTEM 有权

    公开(公告)号：US20220380659A1

    公开(公告)日：2022-12-01

    申请号：US17830368

    申请日：2022-06-02

    申请人： YANGTZE UNIVERSITY

    发明人： Xuemin Yan ,  Peiyue Wu ,  Hao Li ,  Huan Yang ,  Zhaofei Ma ,  Zhongfu Cheng ,  Fei Deng

    IPC分类号： C09K8/584 ,  C09K8/592

    摘要： Disclosed is a combined catalytic viscosity reducing system and a use of the combined system. The combined catalytic viscosity reducing system comprises four slugs, the four slugs are a catalyst slug, a heat generating system slug, a gas injection slug, and a water-soluble viscosity reducing system slug; the catalyst slug includes 10%-15% of azacarbene iron, 15%-30% of tert-butyl hydroperoxide, 2%-5% of phosphoric acid, 2%-5% of hydrogen donor, and 0.5%-1% of emulsifier agent, and the others are solvent; the heat generating system slug includes 10%-30% of NaNO2, 8%-25% of NH4Cl, and 3%-10% of acid initiator, and the others are water, totaling 100%; the water-soluble viscosity reducing system slug, according to mass percentage, includes 0.2%-0.5% of surfactant and 2%-10% of alkali, and the others are water. The combined catalytic viscosity reducing system can effectively reduce viscosity without injecting steam, and the viscosity reduction rate can reach 96.5%.

    HYDROCARBON-PRODUCTION METHODS EMPLOYING MULTIPLE SOLVENT PROCESSES ACROSS A WELL PAD
    8.
    发明申请
    HYDROCARBON-PRODUCTION METHODS EMPLOYING MULTIPLE SOLVENT PROCESSES ACROSS A WELL PAD 有权

    公开(公告)号：US20220136376A1

    公开(公告)日：2022-05-05

    申请号：US17518947

    申请日：2021-11-04

    申请人： Cenovus Energy Inc.

    发明人： Prince AZOM ,  Amos BEN-ZVI

    IPC分类号： E21B43/24 ,  C09K8/592

    摘要： Disclosed are methods for producing hydrocarbons from a subterranean reservoir. The methods comprise penetrating the subterranean reservoir with a plurality of well pairs that are laterally displaced across a well pad in an array. The methods further comprise operating the plurality of well pairs under a first set of conditions that induce a solvent-concentration gradient, a temperature gradient, or a combination thereof within the subterranean reservoir by: (i) injecting varying concentrations of steam, solvent, or combinations thereof across the array, and (ii) producing hydrocarbons from the reservoir via the plurality of well pairs. The methods further comprise operating the plurality of well pairs under a second set of conditions that delocalize the solvent-concentration gradient, the temperature gradient, or the combination thereof across the array to enhance hydrocarbon production.

    METHODS AND COMPOSITIONS FOR ENHANCED OIL RECOVERY
    9.
    发明申请
    METHODS AND COMPOSITIONS FOR ENHANCED OIL RECOVERY 有权

    公开(公告)号：US20210371728A1

    公开(公告)日：2021-12-02

    申请号：US17290274

    申请日：2019-10-31

    申请人： KEMIRA OYJ

    发明人： Yuping LUO ,  Pengpeng QI

    IPC分类号： C09K8/592 ,  C09K8/594 ,  E21B43/20

    摘要： The present embodiments generally relate to methods and compositions comprising one or more degraded in situ gelable polymers. Use of such compositions and methods comprising one or more degraded in situ gelable polymers during enhanced oil recovery may result in an increase in oil production relative to methods and/or compositions which do not comprise one or more degraded in situ gelable polymers.