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    Vertical downward gas-driven miscible blanket flooding oil recovery process
    1.
    发明授权
    Vertical downward gas-driven miscible blanket flooding oil recovery process 失效
    垂直向下气体驱动混合覆盖淹油恢复过程

    公开(公告)号：US3878892A

    公开(公告)日：1975-04-22

    申请号：US35741873

    申请日：1973-05-04

    Applicant: TEXACO INC

    Inventor： ALLEN JOSEPH C ,  TATE JACK F

    IPC: E21B43/16 ,  E21B43/00

    CPC classification number: E21B43/168

    Abstract: A vertical downward gas-driven miscible blanket oil recovery process wherein the spreading rate of the solvent blanket on top of the oil column is increased by adding to or using with the conventional solvent a high density solvent such as carbon disulfide, carbon tetrachloride or certain halogenated hydrocarbons. Sufficient dense solvent is injected along with the conventional hydrocarbon solvent to increase the density of the resulting solvent mixture to a value only slightly less than the density of the formation petroleum being displaced, so that a stable blanket will be maintained with substantially increased rate and extent of spreading of the solvent blanket on top of the oil column. The miscible blanket is displaced downward by injecting gas such as natural gas, methane, or carbon dioxide into the upper portion of the reservoir. The dense solvent may be injected before or after the conventional solvent, or the dense and conventional solvent may be injected simultaneously using dual injection strings.

    Abstract translation: 一种垂直向下气体驱动的混合橡皮布油回收方法，其中通过向常规溶剂中加入或与常规溶剂一起使用高密度溶剂如二硫化碳，四氯化碳或某些卤化物 碳氢化合物。 与常规的烃溶剂一起注入足够的致密溶剂，以将所得溶剂混合物的密度提高到仅略微小于被置换的地层石油的密度的值，从而将以显着增加的速率和程度保持稳定的覆盖层 将溶剂毯铺展在油柱顶部。 通过将诸如天然气，甲烷或二氧化碳的气体注入储存器的上部，可混合的毯子向下移位。 可以在常规溶剂之前或之后注入致密溶剂，或者可以使用双注射管同时注入致密和常规溶剂。

    Recovery of viscous petroleum from asphaltic petroleum containing formations such as tar sand deposits
    6.
    发明授权
    Recovery of viscous petroleum from asphaltic petroleum containing formations such as tar sand deposits 失效
    从包含地层如沥青砂沉积物的沥青油回收粘性石油

    公开(公告)号：US3874452A

    公开(公告)日：1975-04-01

    申请号：US44981274

    申请日：1974-03-11

    Applicant: TEXACO INC

    Inventor： ALLEN JOSEPH C ,  WOODWARD CHARLES D

    IPC: E21B43/243 ,  E21B43/24

    CPC classification number: E21B43/243

    Abstract: Viscous, asphaltic petroleum may be effectively recovered from subterranean viscous, asphaltic petroleum containing formations such as tar sand deposits by first injecting into the tar sand formation a quantity of N-methyl-2-pyrrolidone or furfural or a mixture thereof which precipitates asphaltic material from the bituminous petroleum portion of the formation petroleum. Next, solvent injection is terminated and air is injected into the formation, and the formation is ignited by heating or other means to initiate in situ combustion within the petroleum formation utilizing the precipitated asphaltic materials for fuel for the in situ combustion reaction. Reaction temperature higher than normal in situ combustion temperatures are produced, facilitating thermal cracking and in situ hydrogenation to up grade the produced crude within the tar sand reservoir.

    Abstract translation: 粘性沥青石油可以从地下粘稠的，含沥青的含石油的地层如焦油砂沉积物中有效回收，首先将焦油砂形成一定数量的N-甲基-2-吡咯烷酮或糠醛或其混合物，从而将沥青材料从 地层石油的沥青石油部分。 接下来，终止溶剂注入并将空气注入到地层中，并且通过加热或其它方式点燃地层，以利用用于原位燃烧反应的燃料的沉淀沥青材料在石油地层内引发原位燃烧。 反应温度高于正常的原位燃烧温度，促进热裂解和原位氢化，使焦油砂储层内产生的原油升级。

    Oil recovery process using dilute acid
    7.
    发明授权
    Oil recovery process using dilute acid 失效
    使用稀释酸的油回收方法

    公开(公告)号：US3616852A

    公开(公告)日：1971-11-02

    申请号：US3616852D

    申请日：1969-09-10

    Applicant: TEXACO INC

    Inventor： ALLEN JOSEPH C

    IPC: C09K8/72 ,  E21B43/22 ,  E21B43/27

    CPC classification number: C09K8/72

    Abstract: Recovery of hydrocarbons from a subterranean hydrocarbon-bearing calcareous formation is effected by injecting into the formation via an injection well a dilute aqueous solution of hydrochloric acid and displacing the acid through the formation by injecting an aqueous medium which may comprise dilute hydrochloric acid wherein the acid reacts with the calcareous constituents of the formation thereby generating carbon dioxide and improving the permeability and the porosity of the formation leading to the improved recovery of hydrocarbons therefrom.

    Oil recovery by a combination of solution gas drive and waterflooding
    8.
    发明授权
    Oil recovery by a combination of solution gas drive and waterflooding 失效
    通过解决方案气体驱动和水循环的组合来恢复油

    公开(公告)号：US3580335A

    公开(公告)日：1971-05-25

    申请号：US3580335D

    申请日：1969-12-19

    Applicant: TEXACO INC

    Inventor： ALLEN JOSEPH C ,  BEDNARSKI VALERY N ,  HALL RUSSELL W JR

    IPC: E21B43/16 ,  E21B43/22

    CPC classification number: E21B43/16

    Abstract: Improved oil recovery from an oil-bearing reservoir is obtained by a combination of solution gas drive and water flooding whereby the reservoir is produced by solution gas drive until the pressure of the reservoir is reduced below the bubble point pressure and a critical gas saturation is established, and thereafter the reservoir is produced by a water flood until the rate of oil production reaches a predetermined value or termination point, whereafter the cycle is repeated.

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