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公开(公告)号：US20120085555A1
公开(公告)日：2012-04-12
申请号：US13067720
申请日：2011-06-22
CPC分类号： E21B43/20 , C09K8/58 , Y10S507/904 , Y10S507/936
摘要： Hydrocarbons are recovered from subterranean formations by waterflooding. The method comprises passing an aqueous displacement fluid via an injection well through a porous and permeable sandstone formation to release oil and recovering said released oil from a production well spaced from said injection well, wherein (a) the sandstone formation comprises at least one mineral having a negative zeta potential under the formation conditions; (b) oil and connate water are present in the pores of the formation; and (c) the fraction of the divalent cation content of the said aqueous displacement fluid to the divalent cation content of said connate water is less than 1.
摘要翻译： 通过注水从地下地层中回收碳氢化合物。 该方法包括通过注入井将含水置换流体穿过多孔和可渗透的砂岩形成以释放油并从与所述注入井间隔开的生产井回收所述释放的油，其中（a）所述砂岩形成包括至少一种矿物， 在形成条件下的负ζ电位; （b）地层孔隙中存在油和合生水; 和（c）所述含水置换流体的二价阳离子含量与所述原生水的二价阳离子含量的比例小于1。
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公开(公告)号：US08439111B2
公开(公告)日：2013-05-14
申请号：US13067720
申请日：2011-06-22
CPC分类号： E21B43/20 , C09K8/58 , Y10S507/904 , Y10S507/936
摘要： Hydrocarbons are recovered from subterranean formations by waterflooding. The method comprises passing an aqueous displacement fluid via an injection well through a porous and permeable sandstone formation to release oil and recovering said released oil from a production well spaced from said injection well, wherein (a) the sandstone formation comprises at least one mineral having a negative zeta potential under the formation conditions; (b) oil and connate water are present in the pores of the formation; and (c) the fraction of the divalent cation content of the said aqueous displacement fluid to the divalent cation content of said connate water is less than 1.
摘要翻译： 通过注水从地下地层中回收碳氢化合物。 该方法包括通过注入井将含水置换流体穿过多孔和可渗透的砂岩形成以释放油并从与所述注入井间隔开的生产井回收所述释放的油，其中（a）所述砂岩形成包括至少一种矿物， 在形成条件下的负ζ电位; （b）地层孔隙中存在油和合生水; 和（c）所述含水置换流体的二价阳离子含量与所述原生水的二价阳离子含量的比例小于1。
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公开(公告)号：US20100006283A1
公开(公告)日：2010-01-14
申请号：US12310788
申请日：2007-09-05
IPC分类号： E21B43/241
CPC分类号： E21B43/20 , C09K8/58 , Y10S507/904 , Y10S507/936
摘要： Hydrocarbons are recovered from subterranean formations by waterflooding. The method comprises passing an aqueous displacement fluid via an injection well through a porous and permeable sandstone formation to release oil and recovering said released oil from a production well spaced from said injection well, wherein (a) the sandstone formation comprises at least one mineral having a negative zeta potential under the formation conditions; (b) oil and connate water are present in the pores of the formation; and (c) the fraction of the divalent cation content of the said aqueous displacement fluid to the divalent cation content of said connate water is less than 1.
摘要翻译： 通过注水从地下地层中回收碳氢化合物。 该方法包括通过注入井将含水置换流体穿过多孔和可渗透的砂岩形成以释放油并从与所述注入井间隔开的生产井回收所述释放的油，其中（a）所述砂岩形成包括至少一种矿物， 在形成条件下的负ζ电位; （b）地层孔隙中存在油和合生水; 和（c）所述含水置换流体的二价阳离子含量与所述原生水的二价阳离子含量的比例小于1。
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公开(公告)号：US07987907B2
公开(公告)日：2011-08-02
申请号：US12310788
申请日：2007-09-05
CPC分类号： E21B43/20 , C09K8/58 , Y10S507/904 , Y10S507/936
摘要： Method for increasing the recovery of crude oil from a reservoir containing at least one porous and permeable subterranean formation wherein the formation includes sandstone rock and at least one mineral that has a negative zeta potential under the reservoir conditions and wherein crude oil and connate water are present within the pores of the formation. The method is carried out by (A) injecting into the formation a slug of an aqueous displacement fluid that displaces crude oil from the surface of the pores of the formation wherein the pore volume (PV) of the slug of the aqueous displacement fluid is at least 0.2 and less than 1 and the aqueous displacement fluid has a total dissolved solids (TDS) content in the range of 200 to 10,000 ppm and the fraction of the total multivalent cation content of the aqueous displacement fluid to the total multivalent cation content of the connate water is less than 1, and (B) subsequently injecting into the formation a drive water of higher multivalent cation content and/or higher total dissolved solids content than the aqueous displacement fluid.
摘要翻译： 从含有至少一个多孔和可渗透的地层的储层中增加原油的回收率的方法，其中所述地层包括砂岩岩石和至少一种在储层条件下具有负ζ电位的矿物，并且其中存在原油和原生水 在地层的孔内。 该方法通过以下步骤进行：（A）向地层中注入含水置换液体的块状物，所述含水置换液体从地层孔隙的表面取代原油，其中含水置换流体的矿渣的孔体积（PV） 至少0.2和小于1，并且含水置换流体的总溶解固体（TDS）含量在200至10,000ppm的范围内，并且含水置换流体的总多价阳离子含量与总多价阳离子含量的比例相对于 原生水小于1，（B）随后向该地层注入含水位移流体中较高的多价阳离子含量和/或更高的总溶解固体含量的驱动水。
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公开(公告)号：US20140290942A1
公开(公告)日：2014-10-02
申请号：US14117414
申请日：2012-05-17
CPC分类号： E21B41/0092 , E21B43/20
摘要： Methods, apparatuses and computer readable instructions for determining the effectiveness of, and for performing, a low salinity waterflood. An ion diffusion distance value is determined based on the rate of diffusion of ions within the rock of a reservoir and the residency time of floodwater within the reservoir. The thickness of the layers of the reservoir are compared to this ion diffusion value to determine the effectiveness of performing a low salinity waterflood and also to enable the effective control of a waterflood and to assist in the determination of locations of wells.
摘要翻译： 用于确定低盐度水驱的有效性和用于执行低盐度水驱的方法，装置和计算机可读指令。 离子扩散距离值是根据储层岩石内的离子扩散速率和储层内洪水的驻留时间来确定的。 将储层的层的厚度与该离子扩散值进行比较，以确定执行低盐度水驱的有效性，并且还能够有效地控制水驱并帮助确定井的位置。
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公开(公告)号：US20140345862A1
公开(公告)日：2014-11-27
申请号：US14377073
申请日：2013-02-08
摘要： A method of recovering oil from a subterranean oil-bearing reservoir uses an injection fluid comprising a viscosifying polymer in a low salinity water. The reservoir is penetrated by one or more injection wells and by one or more production wells. The method comprises injecting the injection fluid into at least one of the injection wells in a slug size in the range of 0.4 to 1.5 pore volumes (PV).
摘要翻译： 从地下含油储层回收油的方法使用包含在低盐度水中的增粘聚合物的注入流体。 储存器被一个或多个注入井和一个或多个生产井渗透。 该方法包括将注入流体以0.4-1.5孔体积（PV）范围内的部分尺寸注入到至少一个注入孔中。
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