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1.发明授权
公开(公告)号：US5209104A
公开(公告)日：1993-05-11
申请号：US824268
申请日：1992-01-23
申请人： Samuel H. Collins , Eve S. Sprunt
发明人： Samuel H. Collins , Eve S. Sprunt
IPC分类号： G01N33/24
CPC分类号： G01N33/241
摘要： A porous rock is saturated with a first fluid and electrical resistivity is measured along its length. A second fluid, immiscible with the first fluid, is injected into the porous rock at a first flow rate. This injection continues until displacement of the first fluid from the porous rock ceases and the pressure drop along the porous rock becomes constant, indicating a first residual fluid saturation equilibrium. The foregoing is repeated for a plurality of increasing second fluid injection flow rates to effect electrical resistivity measurements at decreasing residual fluid saturation equilibriums. The method may then be repeated substituting the second fluid for the first and vice versa to perform an imbibition experiment.
摘要翻译： 多孔岩石被第一流体饱和，并沿其长度测量电阻率。 与第一流体不混溶的第二流体以第一流速注入多孔岩石中。 该喷射继续进行，直到来自多孔岩石的第一流体的位移停止，并且沿着多孔岩石的压降变得恒定，表明第一残余液体饱和平衡。 对于多个增加的第二流体喷射流速重复上述以在降低的残余流体饱和平衡时实现电阻率测量。 然后可以重复该方法将第二流体替换为第一流体，反之亦然，以执行吸入实验。
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公开(公告)号：US5069065A
公开(公告)日：1991-12-03
申请号：US641965
申请日：1991-01-16
申请人： Eve S. Sprunt , Samuel H. Collins
发明人： Eve S. Sprunt , Samuel H. Collins
CPC分类号： G01N33/241 , G01N13/00
摘要： A core sample of a porous rock having a wettability representative of a subterranean formation is saturated with a first medium. This first medium is then displaced with an immiscible second medium. Capillary pressure versus wetting phase saturation is measured during the displacement of the first medium with the second medium within the core sample. Mercury is injected into an evacuated core sample of the porous rock, mercury vapor acting as a wetting phase on the porous rock. Capillary pressure versus wetting phase saturation is measured during mercury injection on the evacuated core sample. The ratio of the two capillary pressure versus wetting phase saturation measurements is determined and taken to be an indicator of the wettability of different size pore throats in the porous rock.
摘要翻译： 具有代表地层的润湿性的多孔岩石的核心样品被第一介质饱和。 然后将该第一介质用不混溶的第二介质置换。 在第一介质与核心样品中的第二介质置换期间测量毛细管压力与润湿相饱和度。 将汞注入多孔岩石的真空芯样品中，在多孔岩石上作为润湿阶段的汞蒸气。 在抽空的芯样品上注入汞期间，测量毛细管压力与润湿相饱和度。 确定两个毛细管压力与湿相饱和度测量值的比值，并将其视为多孔岩石中不同大小孔喉的润湿性的指标。
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3.发明授权Method for measuring electrical anisotrophy of a core sample from a subterranean formation 失效用于测量来自地层的岩心样品的各向异性的方法
公开(公告)号：US4924187A
公开(公告)日：1990-05-08
申请号：US364281
申请日：1989-06-12
CPC分类号： G01N33/241 , G01N27/041
摘要： A core sample from a subterranean formation is shaped to provide a plurality of parallel, planar outer surfaces. Electrical resistivity is measured in each of the azimuthal directions through the core sample which are perpendicular to each of the pairs of parallel, planar outer surfaces for each of a plurality of differing fluid saturations within the core sample. A logarithmic plot is made of measured resistivity versus water saturation for each of the azimuthal directions through the core sample for which resistivity was measured. If the same logarithmic plot is obtained for all measured azimuthal directions, the core sample is identified as being electrically isotropic. If different logarithmic plots are obtained for at least 2 azimuthal directions the core sample is identified as being electrically anisotropic.
摘要翻译： 来自地层的核心样品被成形为提供多个平行的平坦的外表面。 在通过核心样品的每个方位角方向上测量电阻率，该核心样品垂直于核心样品中的多个不同流体饱和度中的每一个平行的平面外表面中的每一对。 对于通过测量电阻率的芯样品的每个方位角方向，测量的电阻率对水饱和度的对数图。 如果对于所有测量的方位角方向获得相同的对数图，则核心样品被识别为电学各向同性的。 如果对于至少2个方位角方向获得不同的对数图，则核心样本被识别为电各向异性。
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4.发明授权Method for conducting capillary pressure drainage and imbibition on a core sample of a porous rock 失效用于对多孔岩石的核心样品进行毛细管压力排放和吸收的方法
公开(公告)号：US5079948A
公开(公告)日：1992-01-14
申请号：US646295
申请日：1991-01-28
CPC分类号： G01N15/082 , G01N13/00 , G01N33/241
摘要： A water-saturated core sample of a porous rock is placed in a sleeve which a hydrophobic membrane in one end and a hydrophilic membrane in a second end. A pressurized hydrocarbon is injected into the core sample through the hydrophobic membrane to displace the water in the core sample whereby it drains through the hydrophilic membrane into a collector. Upon a depressurization of the injected hydrocarbon below the displacement pressure of the hydrophilic membrane, the water imbibes back into the core sample through the hydrophilic membrane. Upon a pressurization of the imbibing water above atmospheric pressure the water displaces the hydrocarbon from the core sample through the hydrophobic membrane.
摘要翻译： 将多孔岩石的水饱和岩芯样品放置在套筒中，一端的疏水膜和第二端的亲水膜。 将加压的烃通过疏水膜注入芯样品中以置换芯样品中的水，由此将亲水膜排出到收集器中。 在将注入的烃减压到低于亲水膜的置换压力的情况下，水通过亲水膜吸收回核心样品。 当吸入水在大气压力以上加压时，水从核心样品通过疏水膜取代烃。
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公开(公告)号：US4005749A
公开(公告)日：1977-02-01
申请号：US630832
申请日：1975-11-11
摘要： A surfactant waterflooding process for the recovery of oil from subterranean oil reservoirs in which a water-soluble polyalkylene oxide is employed as a sacrificial agent in order to retard adsorption of the surfactant. An aqueous pretreatment slug is injected which contains a water-soluble polyalkylene oxide sacrificial agent having a molecular weight of at least 1200. Thereafter an aqueous slug containing a surfactant exhibiting a lower molecular weight than that of the polyalkylene oxide sacrificial agent is injected. The surfactant slug may also contain a polyalkylene oxide sacrificial agent as described above. In this case, concentration of sacrificial agent in the surfactant slug normally is lower than the concentration in the pretreatment slug.
摘要翻译： 用于从其中使用水溶性聚环氧烷作为牺牲剂的地下油藏回收油的表面活性剂注水方法，以阻止表面活性剂的吸附。 注入水分预处理块，其含有分子量至少为1200的水溶性聚亚烷基氧化物牺牲剂。然后注入含有表现出比聚亚烷基氧化物牺牲剂低的分子量的表面活性剂的水性渣块。 表面活性剂团块还可含有如上所述的聚环氧烷牺牲剂。 在这种情况下，表面活性剂块中的牺牲剂浓度通常低于预处理块中的浓度。
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