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。

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。