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公开(公告)号：US5003006A
公开(公告)日：1991-03-26
申请号：US255093
申请日：1988-10-07
申请人： A. S. Chu , Harold S. Chung , Dennis H. Hoskin , Thomas O. Mitchell , Paul Shu
发明人： A. S. Chu , Harold S. Chung , Dennis H. Hoskin , Thomas O. Mitchell , Paul Shu
摘要： The permeability of a subterranean oil-bearing formation is controlled by the injection of an aqueous solution of a cross-linked block copolymer containing polar and non-polar segments, with the polar segments generally making up as least 50 percent, usually 60 to 99 percent, of the copolymer. The polar segments are derived from an alkylene oxide and the non-polar segments from styrene or an alkyl styrene either by itself or with a diene. The copolymers are cross-linked with an amino resin or a combination of a phenolic and a water-dispersible aldehyde component. The resulting copolymer gels are stable at low pH conditions, such as those of CO.sub.2 flood conditions.
摘要翻译： 通过注入含有极性和非极性链段的交联嵌段共聚物的水溶液来控制地下含油层的渗透性，极性链段通常占组合物的50％，通常为60-99％ 的共聚物。 极性链段由环氧烷和非极性链段由苯乙烯或烷基苯乙烯衍生自己或用二烯衍生。 共聚物与氨基树脂或酚和水分散性醛组分的组合交联。 所得共聚物凝胶在低pH条件下，例如二氧化碳淹没条件下是稳定的。
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2.发明授权Method for imparting selectivity to otherwise nonselective polymer control gels 失效赋予其它非选择性聚合物控制凝胶选择性的方法
公开(公告)号：US4901795A
公开(公告)日：1990-02-20
申请号：US284626
申请日：1988-12-25
IPC分类号： C09K8/512
CPC分类号： C09K8/512 , Y10S507/903 , Y10S507/935
摘要： A method for selectively closing pores in a formation's zone of greater permeability. A rehealable Xanthan or Alcaligenes biopolymer in an aqueous medium is combined with an organic or transition metal cross-linker which forms a first stage selective ex-situ gel. Second stage non-selective gel precursors are also included. The second stage gel comprises a polymer cross-linked with organic cross-linkers so as to form an in-situ gel more able to withstand formation conditions. The combination is injected into a formation after the first stage gel forms where it selectively enters a zone of greater permeability carrying therewith said non-selective gel. Once in the formation's zone of greater permeability, the gel reheals and forms a rigid gel having the desirable characteristics of the non-selective gel.
摘要翻译： 选择性地封闭地层较大渗透率区域的孔隙的方法。 在水性介质中的可再热黄原胶或产碱杆菌生物聚合物与形成第一阶段选择性离位凝胶的有机或过渡金属交联剂组合。 还包括第二阶段非选择性凝胶前体。 第二阶段凝胶包含与有机交联剂交联的聚合物，以便形成更能承受形成条件的原位凝胶。 在第一阶段凝胶形成之后，将组合注入到地层中，在那里它选择性地进入带有所述非选择性凝胶的较大渗透性区域。 一旦形成了较高渗透性的区域，凝胶再次加热并形成具有非选择性凝胶所需特征的刚性凝胶。
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3.发明授权Oil reservoir permeability profile control with crosslinked welan gum biopolymers 失效具有交联韦兰胶生物聚合物的油藏渗透性分布控制
公开(公告)号：US4981520A
公开(公告)日：1991-01-01
申请号：US283399
申请日：1988-12-12
申请人： Dennis H. Hoskin , Thomas O. Mitchell , Paul Shu
发明人： Dennis H. Hoskin , Thomas O. Mitchell , Paul Shu
摘要： A composition capable of selectively plugging highly permeable zones in a subterranean formation. The composition forms a gel subsequent to its injection into the formation via an injection well. The composition comprises an aqueous solution of a welan gum heteropolysaccharide biopolymer produced by the fermentation of a microorganism of the genus Alcaligenes, a phenolic compound, an aldehyde and water. The compositions of this invention will form stable gels even in low salinity brines. Also provided is a process for selectively plugging regions of higher permeability within an oil-bearing subterranean formation to improve sweep efficiency during a fluid flood oil recovery process using the gel-forming compositions of this invention.
摘要翻译： 能够选择性地堵塞地层中高渗透性区域的组合物。 组合物在通过注射井注入地层后形成凝胶。 组合物包含通过发酵产碱杆菌属，酚类化合物，醛和水的微生物产生的韦兰胶杂多糖生物聚合物的水溶液。 本发明的组合物即使在低盐度盐水中也能形成稳定的凝胶。 还提供了一种用于在使用本发明的凝胶形成组合物的流体洪泛油回收过程中选择性地堵塞含油地下地层中具有较高渗透性的区域的方法，以提高扫除效率。
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4.发明授权
公开(公告)号：US4785028A
公开(公告)日：1988-11-15
申请号：US944727
申请日：1986-12-22
申请人： Dennis H. Hoskin , Thomas O. Mitchell , Paul Shu
发明人： Dennis H. Hoskin , Thomas O. Mitchell , Paul Shu
CPC分类号： C09K8/887 , Y10S507/903 , Y10S507/935
摘要： A composition of matter where a polymer is partially hydrolyzed to form a polymer intermediate which can be gelled. Said polymer intermediate consists of 2-acrylamido-2-methylpropane-3 sulfonate, N-vinyl-N-methyl acetamide, acrylamide, and an alkali metal hydroxide. When cross-linked with a transitional metal ion said polymer intermediate forms a gel suitable for profile control use under harsh conditions. Said gel is exceptionally stable under the hot temperature and saline conditions encountered in profile control usage during a water flood or carbon dioxide oil recovery operation.
摘要翻译： 聚合物部分水解以形成可凝胶化的聚合物中间体的物质组合物。 所述聚合物中间体由2-丙烯酰胺基-2-甲基丙烷磺酸盐，N-乙烯基-N-甲基乙酰胺，丙烯酰胺和碱金属氢氧化物组成。 当与过渡金属离子交联时，所述聚合物中间体在恶劣条件下形成适合轮廓控制的凝胶。 所述凝胶在水浸或二氧化碳回收操作期间在轮廓控制使用中遇到的热温和盐水条件下特别稳定。
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5.发明授权Oil reservoir permeability profile control with crosslinked welan gum biopolymers 失效具有交联韦兰胶生物聚合物的油藏渗透性分布控制
公开(公告)号：US4991652A
公开(公告)日：1991-02-12
申请号：US380348
申请日：1989-07-17
申请人： Dennis H. Hoskin , Thomas O. Mitchell , Paul Shu
发明人： Dennis H. Hoskin , Thomas O. Mitchell , Paul Shu
摘要： A composition capable of selectively plugging highly permeable zones in a subterranean formation. The composition forms a gel subsequent to its injection into the formation via an injection wall. The composition comprises an aqueous solution of a welan gum heteropolysaccharide biopolymer produced by the fermentation of a microorganism of the genus Alcaligenes, a phenolic compound, an aldehyde and water. The compositions of this invention will form stable gels even in low salinity brines. Also provided is a process for selectively plugging regions of higher permeability within an oil-bearing subterranean formation to improve sweep efficiency during a fluid flood oil recovery process using the gel-forming compositions of this invention.
摘要翻译： 能够选择性地堵塞地层中高渗透性区域的组合物。 组合物在通过注射壁注入地层之后形成凝胶。 组合物包含通过发酵产碱杆菌属，酚类化合物，醛和水的微生物产生的韦兰胶杂多糖生物聚合物的水溶液。 本发明的组合物即使在低盐度盐水中也能形成稳定的凝胶。 还提供了一种用于在使用本发明的凝胶形成组合物的流体洪泛油回收过程中选择性地堵塞含油地下地层中具有较高渗透性的区域的方法，以提高扫除效率。
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公开(公告)号：US4776398A
公开(公告)日：1988-10-11
申请号：US31736
申请日：1987-04-30
申请人： A. S. Chu , Harold S. Chung , Dennis H. Hoskin , Thomas O. Mitchell , Paul Shu
发明人： A. S. Chu , Harold S. Chung , Dennis H. Hoskin , Thomas O. Mitchell , Paul Shu
IPC分类号： C09K8/50 , C09K8/508 , C09K8/512 , C09K8/514 , C09K8/588 , C09K8/60 , C09K8/88 , C09K8/90 , E21B43/16
CPC分类号： C09K8/887 , C09K8/5083 , C09K8/512 , C09K8/514 , C09K8/588 , C09K8/905 , Y10S507/903 , Y10S507/935
摘要： The permeability of a subterranean oil-bearing formation is controlled by the injection of an aqueous solution of a cross-linked block copolymer containing polar and non-polar segments, with the polar segments generally making up at least 50 percent, usually 60 to 99 percent, of the copolymer. The polar segments are derived from an alkylene oxide and the non-polar segments from styrene or an alkyl styrene either by itself or with a diene. The copolymers are cross-linked with an amino resin or a combination of a phenolic and a water-dispersible aldehyde component. The resulting copolymer gels are stable at low pH conditions, such as those of CO.sub.2 flood conditions.
摘要翻译： 通过注入含有极性和非极性链段的交联嵌段共聚物的水溶液来控制地下含油层的渗透性，极性链段通常占组合物的至少50％，通常为60-99％ 的共聚物。 极性链段由环氧烷和非极性链段由苯乙烯或烷基苯乙烯衍生自己或用二烯衍生。 共聚物与氨基树脂或酚和水分散性醛组分的组合交联。 所得共聚物凝胶在低pH条件下，例如二氧化碳淹没条件下是稳定的。
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公开(公告)号：US4735265A
公开(公告)日：1988-04-05
申请号：US46606
申请日：1987-05-07
IPC分类号： C09K8/508 , E21B33/138
CPC分类号： C09K8/508
摘要： A method of enhancing the amount of oil recovered from a subterranean oil-bearing formation by controlling the profile of the formation by introducing a predetermined first amount of a permeability control agent in a non-gelatinous state into the formation so that it contacts at least a portion of the formation. A portion of the pores of the formation are plugged by allowing contact to be maintained for a sufficient period of time allowing the first portion to gel. The first amount constitutes a portion of the total amount required to improve the profile of the formation. A predetermined second amount of permeability control agent is thereafter introduced, in a non-gelatinous state, into the formation which contacts the first amount and the portion of the formation not contacted by the first amount for a time period sufficient to gelatinize the second amount so as to plug the remaining unproductive pores of the formation. The second amount constitutes the remaining portion of the total amount required to improve the profile of the formation. Complete profile control is attained while not requiring any greater quantities of permeability control agent than those typically required in a single step profile control treatment.
摘要翻译： 一种通过将非凝胶状态的预定的第一量的渗透性控制剂引入所述地层中来控制所述地层的轮廓，从而增加从地下含油地层回收的油的量的方法，使得其接触至少一种 部分地层。 通过允许接触保持足够的时间段使得第一部分凝胶化，将部分孔隙堵塞。 第一个数量构成改善地层剖面所需总量的一部分。 然后以非凝胶状态将预定的第二量的渗透性控制剂引入接触第一量的地层和未接触第一量的地层部分足够使第二量凝胶化的时间段 以堵塞地层的剩余非生产性孔。 第二个数量构成改善地层剖面所需总量的剩余部分。 在不需要任何更多量的渗透性控制剂的情况下，完成轮廓控制，而不需要在单一步骤轮廓控制处理中通常需要的那些。
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8.发明授权
公开(公告)号：US4940090A
公开(公告)日：1990-07-10
申请号：US350499
申请日：1989-05-11
申请人： Dennis H. Hoskin , Paul Shu
发明人： Dennis H. Hoskin , Paul Shu
摘要： A gel-forming composition capable of plugging highly permeable zones in a subterranean formation. The composition comprises water, a water-dispersible polyvinyl alcohol copolymer and a crosslinking agent which is a mixture of an aldehyde and a phenolic component in an amount effective to cause gelation of the aqueous solution of the copolymer. The resultant gel is exceptionally thermally stable and, therefore, can be used as an effective profile control agent in all enhanced oil recovery operations, including steam flooding. Also provided is a process for recovering oil from a subterranean oil-bearing formation.
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9.发明授权Organically crosslinked polyvinyl alcohol copolymeric gels for use under harsh reservoir conditions 失效有机交联的聚乙烯醇共聚物凝胶用于苛刻储存条件下使用
公开(公告)号：US5100952A
公开(公告)日：1992-03-31
申请号：US524943
申请日：1990-05-18
申请人： Dennis H. Hoskin , Paul Shu
发明人： Dennis H. Hoskin , Paul Shu
摘要： A gel-forming composition capable of plugging highly permeable zones in a subterranean formation. The composition comprises water, a water-dispersible polyvinyl alcohol copolymer and a crosslinking agent which is a mixture of an aldehyde and a phenolic component in an amount effective to cause gelation of the aqueous solution of the copolymer. The resultant gel is exceptionally thermally stable and, therefore, can be used as an effective profile control agent in all enhanced oil recovery operations, including steam flooding. Also provided is a process for recovering oil from a subterranean oil-bearing formation.
摘要翻译： 能够堵塞地层中高渗透性区域的凝胶形成组合物。 组合物包含水，水分散性聚乙烯醇共聚物和交联剂，其是有效引起共聚物水溶液凝胶化的量的醛和酚类组分的混合物。 所得凝胶特别热稳定，因此可用作所有增强的采油操作（包括蒸汽驱油）中的有效型材控制剂。 还提供了从地下含油地层中回收油的方法。
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10.发明授权
公开(公告)号：US4896723A
公开(公告)日：1990-01-30
申请号：US369180
申请日：1989-06-21
申请人： Dennis H. Hoskin , Paul Shu
发明人： Dennis H. Hoskin , Paul Shu
CPC分类号： C09K8/887 , E21B43/24 , Y10S507/903 , Y10S507/935
摘要： A novel cross-linked polymer is obtained by cross-linking polyvinyl alcohol with a cross-linking agent which is a mixture of a phenolic component and an aldehyde or a mixture of a naphtholic component and an aldehyde. The resulting polymer is exceptionally thermally stable and, therefore, can be used as an effective permeability control agent in all enhanced oil recovery operations, including steam flooding.
摘要翻译： 通过将聚乙烯醇与作为酚类成分和醛的混合物的交联剂或萘酚成分与醛的混合物交联，得到新的交联聚合物。 所得聚合物特别热稳定，因此可用作所有强化采油操作中的有效渗透控制剂，包括蒸汽驱。
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