METHOD FOR REMEDIATION OF SUBTERRANEAN-FORMED METAL-POLYMER COMPLEXES USING A METAL COMPLEXING AGENT

    公开(公告)号:US20190120037A1

    公开(公告)日:2019-04-25

    申请号:US16226464

    申请日:2018-12-19

    IPC分类号: E21B43/26 E21B47/06 C09K8/52

    摘要: This disclosure describes formulations and methods for remediating subterranean-formed metal-polymer complexes in wells in subterranean formations. In one embodiment, the method includes injecting a metal-polymer complex remediation mixture containing a metal complexing agent into a subterranean formation adjacent to a well at a pressure below the fracture pressure of the formation. A sufficient contact time is allowed and then the metal-polymer complex remediation mixture is pumped from the subsurface. This has been shown to remediate polymer-containing, subterranean-formed metal-polymer complexes in shale formations. Without being held to a particular theory it appears that the metal complexing agent is forming metal complexes with the metals in the complexes, and particularly divalent metal ions. This removal of naturally occurring metals may be un-crosslinking and causing the metal-polymer complexes to go into solution, thereby removing the blockages caused by the metal-polymer complexes.

    Method for remediation of subterranean-formed metal-polymer complexes using a metal complexing agent

    公开(公告)号:US10202834B2

    公开(公告)日:2019-02-12

    申请号:US14525038

    申请日:2014-10-27

    IPC分类号: E21B43/26 E21B47/06 C09K8/52

    摘要: This disclosure describes formulations and methods for remediating subterranean-formed metal-polymer complexes in wells in subterranean formations. In one embodiment, the method includes injecting a metal-polymer complex remediation mixture containing a metal complexing agent into a subterranean formation adjacent to a well at a pressure below the fracture pressure of the formation. A sufficient contact time is allowed and then the metal-polymer complex remediation mixture is pumped from the subsurface. This has been shown to remediate polymer-containing, subterranean-formed metal-polymer complexes in shale formations. Without being held to a particular theory it appears that the metal complexing agent is forming metal complexes with the metals in the complexes, and particularly divalent metal ions. This removal of naturally occurring metals may be un-crosslinking and causing the metal-polymer complexes to go into solution, thereby removing the blockages caused by the metal-polymer complexes.

    STIMULATION OF WELLS IN NANO-DARCY SHALE FORMATIONS
    4.
    发明申请
    STIMULATION OF WELLS IN NANO-DARCY SHALE FORMATIONS 有权
    NANO-DARCY SHALE模型中的孔的刺激

    公开(公告)号:US20150292308A1

    公开(公告)日:2015-10-15

    申请号:US14686237

    申请日:2015-04-14

    摘要: This disclosure describes formulations and methods for stimulating the production from wells in nano-darcy shale formations. In one embodiment, the method includes injecting a treatment mixture containing a metal complexing agent into a nano-darcy shale formation adjacent to a well at a pressure below the fracture pressure of the formation. A sufficient contact time is allowed and then the treatment mixture is pumped from the subsurface. This has been shown to stimulate well production in shale formations. Without being held to a particular theory it appears that the metal complexing agent is binding with naturally occurring metals in the shale formation, and particularly divalent metal ions, which are then extracted with the spent fluid. This removal of naturally occurring metals may be increasing the permeability of the formation in the contact region adjacent to the well, thereby causing the observed increased production.

    摘要翻译: 本公开描述了用于刺激纳米亲水页岩地层中的井的生产的制剂和方法。 在一个实施方案中,该方法包括在低于地层断裂压力的压力下,将含有金属络合剂的处理混合物注入邻近井的纳米碧玺页岩地层。 允许足够的接触时间,然后将处理混合物从地下泵送。 这已被证明可以刺激页岩层的良好生产。 不被认为是特定的理论,似乎金属络合剂与页岩地层中的天然存在的金属结合,特别是二价金属离子,然后用废流体萃取。 天然存在的金属的这种去除可以增加邻近井的接触区域中地层的渗透性,从而导致观察到的增加的生产。

    Iron control as part of a well treatment using time-released agents

    公开(公告)号:US11473003B2

    公开(公告)日:2022-10-18

    申请号:US17170290

    申请日:2021-02-08

    IPC分类号: C09K8/528 E21B43/26 E21B43/22

    摘要: In a well in a subterranean formation, treatment fluids for time-released iron control are utilized. These treatment fluids contain a time-released form of a complexing agent or reducing agent, wherein the agent forms a soluble product with iron. The time-released form prevents loss of the agent prior to delivery to the desired site and at the desired time(s). Methods for controlling iron in a well in a subterranean formation utilize these treatment fluids containing a time-released form of a complexing agent or reducing agent and these methods create soluble products when the agent interacts with the iron to control the iron from the formation and/or well.

    Method for remediation of subterranean-formed metal-polymer complexes using peracetic acid

    公开(公告)号:US11299972B2

    公开(公告)日:2022-04-12

    申请号:US17066993

    申请日:2020-10-09

    IPC分类号: E21B43/27 C09K8/524 E21B47/06

    摘要: This disclosure describes methods for remediating subterranean-formed metal-polymer complexes in wells in subterranean formations. In particular, these methods utilize a peracetic acid remediation mixture. The peracetic acid remediation mixture is injected into a subterranean formation adjacent to a well at a pressure below the fracture pressure of the formation. A sufficient contact time is allowed and then the peracetic acid remediation mixture is pumped from the subsurface. This has been shown to degrade, and thus remediate, polymer-containing, subterranean-formed metal-polymer complexes in shale formations.

    IRON CONTROL AS PART OF A WELL TREATMENT USING TIME-RELEASED AGENTS

    公开(公告)号:US20210246358A1

    公开(公告)日:2021-08-12

    申请号:US17170290

    申请日:2021-02-08

    IPC分类号: C09K8/528 E21B43/26

    摘要: In a well in a subterranean formation, treatment fluids for time-released iron control are utilized. These treatment fluids contain a time-released form of a complexing agent or reducing agent, wherein the agent forms a soluble product with iron. The time-released form prevents loss of the agent prior to delivery to the desired site and at the desired time(s). Methods for controlling iron in a well in a subterranean formation utilize these treatment fluids containing a time-released form of a complexing agent or reducing agent and these methods create soluble products when the agent interacts with the iron to control the iron from the formation and/or well.

    Method for remediation of subterranean-formed metal-polymer complexes using a metal complexing agent

    公开(公告)号:US10697282B2

    公开(公告)日:2020-06-30

    申请号:US16226464

    申请日:2018-12-19

    IPC分类号: E21B43/26 C09K8/52 E21B47/06

    摘要: Formulations and methods for remediating subterranean-formed metal-polymer complexes in wells in subterranean formations are described. In one embodiment, the method includes injecting a metal-polymer complex remediation mixture containing a metal complexing agent into a subterranean formation adjacent to a well at a pressure below the fracture pressure of the formation. A sufficient contact time is allowed and then the metal-polymer complex remediation mixture is pumped from the subsurface. This has been shown to remediate polymer-containing, subterranean-formed metal-polymer complexes in shale formations. Without being held to a particular theory, it appears that the metal complexing agent is forming metal complexes with the metals in the complexes, and particularly divalent metal ions. This removal of naturally occurring metals may be un-crosslinking and causing the metal-polymer complexes to go into solution, thereby removing the blockages caused by the metal-polymer complexes.

    IRON CONTROL AS PART OF A WELL TREATMENT USING TIME-RELEASED AGENTS

    公开(公告)号:US20230045825A1

    公开(公告)日:2023-02-16

    申请号:US17903537

    申请日:2022-09-06

    IPC分类号: C09K8/528 E21B43/26

    摘要: In a well in a subterranean formation, treatment fluids for time-released iron control are utilized. These treatment fluids contain a time-released form of a complexing agent, wherein the complexing agent forms an insoluble complex with iron. The time-released form prevents loss of the agent prior to delivery to the desired site and at the desired time(s). Methods for controlling iron in a well in a subterranean formation utilize these treatment fluids containing a time-released form of a complexing agent and these methods create insoluble complexes of the agent with the iron to control the iron from the formation and/or well.

    IRON CONTROL AS PART OF A WELL TREATMENT USING TIME-RELEASED AGENTS

    公开(公告)号:US20230053058A1

    公开(公告)日:2023-02-16

    申请号:US17903562

    申请日:2022-09-06

    IPC分类号: C09K8/528 E21B43/26

    摘要: In a well in a subterranean formation, treatment fluids for time-released iron control are utilized. These treatment fluids contain a time-released form of a complexing agent or reducing agent, wherein the agent forms a soluble product with iron. The time-released form prevents loss of the agent prior to delivery to the desired site and at the desired time(s). Methods for controlling iron in a well in a subterranean formation utilize these treatment fluids containing a time-released form of a complexing agent or reducing agent and these methods create soluble products when the agent interacts with the iron to control the iron from the formation and/or well.