-
公开(公告)号：US12043791B2
公开(公告)日：2024-07-23
申请号：US18251366
申请日：2020-11-02
发明人： Ksenia Mikhailovna Kaprielova , Nikita Yurievich Silko , Bipin Jain , Elena Vladimirovna Danilevich
CPC分类号： C09K8/426 , C09K8/44 , C09K8/512 , C09K8/514 , E21B21/003 , E21B33/138 , C09K2208/08 , E21B2200/08
摘要： The method of fluid loss control is provided for the case of high-rate fluid loss. Two treatment fluids are provided, where a first treatment fluid comprising a carrier fluid, solids and a first polyelectrolyte, and a second treatment fluid comprising a carrier fluid and a second polyelectrolyte. Two polyelectrolytes in both treatment fluids are oppositely charged under the pumping conditions, being taken from the classes of polyanionic and polycationic polymers. Two treatment fluids are pumped separately to the zone with fluid loss. The mixing of two treatment fluids into the well creates low-permeability agglomerates that plugs the fluid leakage channel, preventing or reducing further fluid movement between the wellbore and subterranean formation. The plugging of thief zone can be temporary or permanent.
-
公开(公告)号：US20230407162A1
公开(公告)日：2023-12-21
申请号：US18251366
申请日：2020-11-02
发明人： Ksenia Mikhailovna Kaprielova , Nikita Yurievich Silko , Bipin Jain , Elena Vladimirovna Danilevich
CPC分类号： C09K8/426 , C09K8/44 , C09K8/512 , C09K8/514 , E21B33/138 , E21B21/003 , C09K2208/08 , E21B2200/08
摘要： The method of fluid loss control is provided for the case of high-rate fluid loss. Two treatment fluids are provided, where a first treatment fluid comprising a carrier fluid, solids and a first polyelectrolyte, and a second treatment fluid comprising a carrier fluid and a second polyelectrolyte. Two polyelectrolytes in both treatment fluids are oppositely charged under the pumping conditions, being taken form the classes of polyanionic and polycationic polymers. Two treatment fluids are pumped separately to the zone with fluid loss. The mixing of two treatment fluids into the well creates low-permeability agglomerates that plugs the fluid leakage channel, preventing or reducing further fluid movement between the wellbore and subterranean formation. The plugging of thief zone can be temporary or permanent.
-
公开(公告)号：US11168555B2
公开(公告)日：2021-11-09
申请号：US16620597
申请日：2017-06-09
IPC分类号： E21B33/13 , E21B43/26 , C09K8/44 , C09K8/467 , C09K8/504 , C09K8/508 , C09K8/514 , C09K8/516 , C09K8/68 , C09K8/70 , E21B33/14
摘要： A method for temporary isolation of a well interval is proposed, the method comprising: pumping a first slurry into the well, the slurry comprising a viscous carrier fluid, degradable particulates, and degradable fibers, until a first filter cake is formed; and pumping a second slurry into the well, the slurry comprising a viscous carrier fluid, non-degradable particulates, and degradable fibers, until a second filter cake is formed. The first and the second slurries are not mixed when pumped into the well. To ensure optimum interval isolation, the ratio of the volume of the first slurry to the volume of the second slurry should be in the range 1:5 to 2:1.
A method for hydraulic refracturing within an interval with several hydraulic fractures and a non-damaging well killing method are also proposed.
The technical result is manifested in no formation damage and degradation of the sealing layer formed.
-
-
搜索结果
3 条记录 (耗时 0.013 秒)
