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公开(公告)号：USRE35891E
公开(公告)日：1998-09-08
申请号：US538664
申请日：1995-10-03
IPC分类号： E21B43/24
CPC分类号： E21B43/24
摘要： A method of increasing the near-wellbore permeability of porous formation comprises exposing formation to an elevated temperature of .�.400.degree..!. .Iadd.600.degree. .Iaddend.C. or greater to cause dehydration of the clay lattices, vaporization of any blocked water, mud filtrate or other fluids, and/or destruction of the clay structure.
摘要翻译： 增加多孔结构的近井眼渗透性的方法包括将形成暴露于[400℃以上] 600℃以上的升温，使粘土晶格脱水，任何封闭水，泥浆滤液或其它流体的蒸发， 和/或破坏粘土结构。
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2.发明授权Process for removing and preventing near-wellbore damage due to asphaltene precipitation 失效消除和防止沥青质沉淀造成的近井筒损坏的方法
公开(公告)号：US5425422A
公开(公告)日：1995-06-20
申请号：US124224
申请日：1993-09-21
摘要： In accordance with the present invention, there is now provided a method for removing asphaltene deposits in a well environment such as the wellbore and near-wellbore regions, comprising the injection of deasphalted oil therein to solubilize the asphaltene deposits obstructing the well environment. More specifically, the method of the invention comprises the injection of deasphalted oil into the wellbore and the near-wellbore formation followed by a soaking period and a production period. The method of the present invention has the great advantage of readily dissolving precipitated asphaltene in a well environment without other costly treatments such as the use of solvents like xylene or toluene. Furthermore, the present method does not require the incorporation of any additives in the deasphalted oil.
摘要翻译： 根据本发明，现在提供了在诸如井筒和近井筒区域的井环境中去除沥青质沉积物的方法，其包括在其中注入脱沥青油以溶解阻碍井环境的沥青质沉积物。 更具体地说，本发明的方法包括将脱沥青油注入井眼和近井筒形成，然后浸泡期和生产周期。 本发明的方法具有将沉淀沥青质容易地溶解在井环境中而没有其他昂贵处理如使用溶剂如二甲苯或甲苯的优点。 此外，本方法不需要将任何添加剂并入脱沥青油中。
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公开(公告)号：US5361845A
公开(公告)日：1994-11-08
申请号：US70812
申请日：1993-06-03
IPC分类号： E21B43/24
CPC分类号： E21B43/24
摘要： A method of increasing the near-wellbore permeability of porous formation comprises exposing formation to an elevated temperature of 400.degree. C. or greater to cause dehydration of the clay lattices, vaporization of any blocked water, mud filtrate or other fluids, and/or destruction of the clay structure.
摘要翻译： 增加多孔结构的近井眼渗透性的方法包括将地层暴露于400℃或更高的升高温度以引起粘土晶格的脱水，任何封闭的水，泥浆滤液或其它流体的蒸发和/或破坏 的粘土结构。
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4.发明授权Process for salt extraction from hydrogen-sulphide scrubber solution using electrodialysis 失效使用电渗析从硫化氢洗涤器溶液中提取盐的方法
公开(公告)号：US5324403A
公开(公告)日：1994-06-28
申请号：US57641
申请日：1993-05-05
摘要： This invention relates a method for the selective removal of alkali metal salts of sulphate (SO.sub.4.sup.2-), and thiosulphate (S.sub.2 O.sub.3.sup.2-) from hydrogen sulphide (H.sub.2 S) scrubber solutions of the liquid redox type using an electrodialysis system. In the process of this invention the H.sub.2 S scrubber solution is directed to the diluting compartments within an electrodialysis stack, while a collecting solution with a minimal initial salt content is directed to the concentrating compartments. With the application of a direct current a portion of the alkali metal salts of sulphate and thiosulphate present in the scrubber solution are transported through ion selective membranes into the collecting solution. Essentially all of the metal organic chelate reagents and carbonate ions initially present in the scrubber solution are retained in the desalted solution and can be recycled to the H.sub.2 S scrubbing process. Organic fouling of the anionic membranes is avoided by maintaining the organic weight fraction of the total dissolved solids in the diluting solution less than 0.15 and preferably less than 0.05. High current efficiency is obtained at salt concentrations above 5 normal in the diluting solution by maintaining the salt concentration of the collecting solution below that in the diluting solution.
摘要翻译： 本发明涉及一种使用电渗析系统从液态氧化还原型硫化氢（H2S）洗涤器溶液中选择性除去硫酸盐（SO42-）和硫代硫酸盐（S2O32-）的碱金属盐的方法。 在本发明的方法中，H2S洗涤器溶液被引导到电渗析堆中的稀释室，而具有最小初始盐含量的收集溶液被引导到浓缩室。 通过施加直流电，洗涤器溶液中存在的硫酸盐和硫代硫酸盐的一部分碱金属盐通过离子选择性膜输送到收集溶液中。 最初存在于洗涤器溶液中的所有金属有机螯合剂和碳酸根离子基本保留在脱盐溶液中，并且可以再循环到H 2 S洗涤过程中。 通过将稀释溶液中的总溶解固体的有机重量分数维持在0.15以下，优选小于0.05来避免阴离子膜的有机结垢。 通过将收集溶液的盐浓度保持在稀释溶液中的浓度以下，在稀释溶液中的盐浓度高于5正常值时可获得高电流效率。
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