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    Dense solvent demulsification method for bituminous petroleum-water emulsions
    1.
    发明授权
    Dense solvent demulsification method for bituminous petroleum-water emulsions 失效
    沥青石油 - 水乳液密集溶剂破乳法

    公开(公告)号：US3878090A

    公开(公告)日：1975-04-15

    申请号：US40152873

    申请日：1973-09-27

    Applicant: TEXACO EXPLORATION CA LTD

    Inventor： REDFORD DAVID ARTHUR

    IPC: C10G33/04

    CPC classification number: C10G33/04

    Abstract: Resolving or breaking oil field emulsions involving bituminous petroleum is more difficult than emulsions involving conventional petroleum because the specific gravity of bituminous petroleum is approximately equal to the specific gravity of water. Demulsification of bituminous petroleum emulsions is aided by adding a solvent for the bitumen whose specific gravity is substantially greater than the specific gravity of water to the emulsion. Examples of suitable solvents include carbon disulfide, carbon tetrachloride, and certain halogenated hydrocarbons which are essentially insoluble in and unreactive with water.

    Abstract translation: 涉及沥青石油的解决或破裂的油田乳液比涉及常规石油的乳液更难，因为沥青石油的比重近似等于水的比重。 沥青石油乳液的破乳通过向沥青中添加比重大于比重的沥青的溶剂来辅助。 合适溶剂的实例包括二硫化碳，四氯化碳和基本上不溶于水和与水不反应的某些卤代烃。

    Method for establishing communication path in viscous petroleum-containing formations including tar sand deposits for use in oil recovery operations
    3.
    发明授权
    Method for establishing communication path in viscous petroleum-containing formations including tar sand deposits for use in oil recovery operations 失效
    在含石油的地层中建立通信路径的方法，包括用于采油作业的焦油砂沉积物

    公开(公告)号：US3908762A

    公开(公告)日：1975-09-30

    申请号：US40152973

    申请日：1973-09-27

    Applicant: TEXACO EXPLORATION CA LTD

    Inventor： REDFORD DAVID ARTHUR

    IPC: E21B43/16 ,  E21B43/24 ,  E21B43/40 ,  E21B43/26

    CPC classification number: E21B43/168 ,  E21B43/2405 ,  E21B43/40

    Abstract: Many oil recovery techniques for viscous oil recovery such as recovery of bitumen from tar sand deposits, including steam injection and in situ combustion, require establishment of a high permeability interwell fluid flow path in the formation. The method of the present invention comprises forming an initial entry zone into the formation by means such as noncondensible gas sweep or hydraulic fracturing and propping, or utilizing high permeability streaks naturally occurring within the formation, and expanding the zone by injecting steam and a noncondensible gas into the gas swept zone, propped fracture zone or high permeability streak. The mixture of steam and noncondensible gas is injected into the formation at a pressure in pounds per square inch not exceeding numerically the overburden thickness in feet, and the steam-noncondensible gas-bitumen mixture is produced either from the same or a remotely located well. The operation may be repeated through several cycles in order to enlarge the flow channel. Suitable noncondensible gases include nitrogen, air, carbon dioxide, flue gas, exhaust gas, methane, natural gas, ethane, propane, butane and mixtures thereof. Saturated or supersaturated steam may be used.

    Abstract translation: 用于粘性油回收的许多油回收技术，例如从焦油砂沉积物回收沥青，包括蒸汽注入和原位燃烧，都需要在地层中建立高渗透性的井间流体流动路径。 本发明的方法包括通过诸如不可冷凝气体扫掠或水力压裂和支撑之类的方法，或者利用天然存在于地层内的高渗透条纹来形成初始进入区域，以及通过注入蒸汽和不可凝气体来扩展区域 进入气体扫掠区，支撑断裂带或高渗透性条纹。 蒸汽和不可冷凝气体的混合物以磅/平方英寸的压力注入到地层中，不超过数字，以英尺为单位的覆盖层厚度，并且蒸汽不​​可冷凝的气体 - 沥青混合物可以从相同的或位于远端的井产生。 为了扩大流路，操作可以重复几个循环。 合适的不可冷凝气体包括氮气，空气，二氧化碳，烟道气，废气，甲烷，天然气，乙烷，丙烷，丁烷及其混合物。 可以使用饱和或过饱和蒸汽。

    Method for recovering petroleum from viscous petroleum containing formations including tar sands
    4.
    发明授权
    Method for recovering petroleum from viscous petroleum containing formations including tar sands 失效
    从包含三氯乙烯的含石油石油回收石油的方法

    公开(公告)号：US3838738A

    公开(公告)日：1974-10-01

    申请号：US35742573

    申请日：1973-05-04

    Applicant: TEXACO INC ,  ALLEN J ,  TEXACO EXPLORATION CA LTD ,  REDFORD D

    Inventor： REDFORD D ,  ALLEN J

    IPC: E21B43/24 ,  E21B43/26

    CPC classification number: E21B43/2405 ,  E21B43/16

    Abstract: Petroleum may be recovered from viscous petroleum containing formations including tar sand deposits by first creating a fluid communication path low in the formation, followed by injecting a heated fluid, aqueous or nonaqueous, into the fluid communication path, followed by injecting a volatile solvent such as carbon disulfide, benzene or toluene into the preheated flow path and continuing injecting the heating fluid. The low boiling point solvent is vaporized and moves upward into the formation where it dissolves petroleum, loses heat and condenses thereafter flowing down carrying dissolved bitumen with it into the preheated flow path. The low boiling point solvent effectively cycles or refluxes within the formation and is not produced to the surface of the earth. Bitumen is transferred from the volatile solvent to the heating fluid continually passing through the communication path, and bitumen and heating fluid are recovered together as a mixture or solution.

    Abstract translation: 石油可以通过首先在地层中产生低的流体连通路径，然后将加热的水或非水的流体注入到流体连通路径中，然后注入挥发性溶剂，例如 二硫化碳，苯或甲苯加入到预热流路中并持续注入加热流体。 低沸点溶剂蒸发并向上移动到其中溶解石油的地层中，失去热量并随后冷凝，将其中带有溶解的沥青流入预热的流动路径中。 低沸点溶剂在地层内有效地循环或回流，不会产生到地球表面。 沥青从挥发性溶剂转移到连续通过连通路径的加热流体，沥青和加热流体作为混合物或溶液一起回收。

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