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    In-situ method and system for removing heavy metals from produced fluids
    1.
    发明授权
    In-situ method and system for removing heavy metals from produced fluids 有权
    用于从产生的流体中去除重金属的原位方法和系统

    公开(公告)号：US09447675B2

    公开(公告)日：2016-09-20

    申请号：US13896255

    申请日：2013-05-16

    Applicant: Chevron U.S.A. Inc.

    Inventor： Sujin Yean ,  Darrell Lynn Gallup ,  Lyman Arnold Young ,  Russell Evan Cooper ,  Matthew Bernard Zielinski ,  Mark Anthony Emanuele ,  Brian Christopher Llewellyn ,  Dennis John O'Rear

    IPC: E21B43/16 ,  E21B43/38 ,  E21B43/26 ,  E21B43/34 ,  E21B43/40 ,  C09K8/52

    CPC classification number: E21B43/38 ,  C09K8/52 ,  E21B43/16 ,  E21B43/26 ,  E21B43/34 ,  E21B43/40

    Abstract: Methods and systems relate to the in-situ removal of heavy metals such as mercury, arsenic, etc., from produced fluids such as gases and crudes from a subterranean hydrocarbon-bearing formation. A sufficient amount of a fixing agent is injected into formation with a dilution fluid. The fixing agent reacts with the heavy metals forming precipitate, or is extracted heavy metals into the dilution fluid as soluble complexes. In one embodiment, the heavy metal precipitates remain in the formation. After the recovery of the produced fluid, the dilution fluid containing the heavy metal complexes is separated from the produced fluid, generating a treated produced fluid having a reduced concentration of heavy metals. In one embodiment, the dilution fluid is water, and the wastewater containing the heavy metal complexes after recovery can be recycled by injection into a reservoir.

    Abstract translation: 方法和系统涉及从地下含烃地层的产生的流体例如气体和原油原位去除重金属如汞，砷等。 用稀释液注入足量的固定剂。 固定剂与重金属形成沉淀物反应，或将重金属萃取到稀释液中作为可溶性络合物。 在一个实施方案中，重金属沉淀物保留在地层中。 在回收所产生的流体之后，将含有重金属配合物的稀释液与所产生的流体分离，产生具有降低的重金属浓度的经处理的生产流体。 在一个实施方案中，稀释流体是水，并且在回收之后含有重金属络合物的废水可以通过注入回收到储存器中。

    Process, method, and system for removing heavy metals from fluids
    2.
    发明授权
    Process, method, and system for removing heavy metals from fluids 有权
    从流体中除去重金属的工艺，方法和系统

    公开(公告)号：US08992769B2

    公开(公告)日：2015-03-31

    申请号：US13895983

    申请日：2013-05-16

    Applicant: Chevron U.S.A. Inc.

    Inventor： Dennis John O'Rear ,  Russell Evan Cooper ,  Sujin Yean ,  Stephen Harold Roby ,  Hosna Mogaddedi ,  Manuel Eduardo Quintana ,  Jerry Max Rovner

    IPC: C10G17/02 ,  C10G17/08 ,  C10G29/06 ,  C10G29/10 ,  C10G29/12 ,  C10G53/04 ,  C10G29/20 ,  C10G29/02 ,  C10G29/22 ,  C10G53/08

    CPC classification number: C10G29/205 ,  C10G29/02 ,  C10G29/06 ,  C10G29/20 ,  C10G29/22 ,  C10G53/04 ,  C10G53/08 ,  C10G2300/201 ,  C10G2300/205

    Abstract: Trace amount levels of heavy metals such as mercury in crude oil are reduced by contacting the crude oil with a sufficient amount of a reducing agent to convert at least a portion of the non-volatile mercury into a volatile form of mercury, which can be subsequently removed by any of stripping, scrubbing, adsorption, and combinations thereof. In one embodiment, at least 50% of the mercury is removed. In another embodiment, the removal rate is at least 99%. In one embodiment, the reducing agent is selected from sulfur compounds containing at least one sulfur atom having an oxidation state less than +6; ferrous compounds; stannous compounds; oxalates; cuprous compounds; organic acids which decompose to form CO2 and/or H2 upon heating; hydroxylamine compounds; hydrazine compounds; sodium borohydride; diisobutylaluminium hydride; thiourea; transition metal halides; and mixtures thereof.

    Abstract translation: 通过使原油与足够量的还原剂接触将原油中的汞等痕量的重金属还原，以将至少一部分非挥发性汞转化为挥发性汞，后者可以随后 通过任何剥离，洗涤，吸附及其组合除去。 在一个实施方案中，除去至少50％的汞。 在另一个实施方案中，去除率至少为99％。 在一个实施方案中，还原剂选自含有氧化态小于+ 6的至少一个硫原子的硫化合物; 亚铁化合物; 亚锡化合物; 草酸盐 亚铜化合物; 在加热时分解形成CO 2和/或H 2的有机酸; 羟胺化合物; 肼化合物; 硼氢化钠 二异丁基氢化铝; 硫脲 过渡金属卤化物 及其混合物。

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