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    Method for recovering viscous petroleum
    1.
    发明授权
    Method for recovering viscous petroleum 失效

    公开(公告)号：US3903967A

    公开(公告)日：1975-09-09

    申请号：US50802974

    申请日：1974-09-23

    Applicant: TEXACO INC

    Inventor： WOODWARD CHARLES D

    IPC: E21B43/16 ,  E21B43/24

    CPC classification number: E21B43/24 ,  E21B43/162

    Abstract: When supplemental oil recovery methods such as steam flooding are applied to viscous oil containing formations such as tar sand deposits, poor vertical conformants frequently results, particularly when the oil formation contains one or more zones having a permeability substantially less than other zones in the formation. Recovery efficiency is improved if the injection well is completed so as to establish separate communication means between the surface and each of the zones of different permeability. After injection of a thermal recovery fluid such as steam into the more permeable layer is initiated, injection of a hydrocarbon solvent, either gaseous or liquid, is initiated by the separate communication means into the less permeable zone, and from about .05 to about .5 pore volumes of solvent material is introduced into the less permeable zone. This is displaced with gas such as natural gas or low molecular weight gaseous hydrocarbons, and then steam injection into the less permeable zone will be maintained at a value less than the injection pressure into the more permeable zone for a period until the desired receptivity in the lower permeability zone has been obtained, after which the injection pressure in the two zones is essentially equalized.

    Method for recovering viscous petroleum
    5.
    发明授权
    Method for recovering viscous petroleum 失效
    回收粘性石油的方法

    公开(公告)号：US3905422A

    公开(公告)日：1975-09-16

    申请号：US50838574

    申请日：1974-09-23

    Applicant: TEXACO INC

    Inventor： WOODWARD CHARLES D

    IPC: E21B43/24 ,  E21B43/243 ,  E21B43/30

    CPC classification number: E21B43/243 ,  E21B43/24 ,  E21B43/30

    Abstract: The efficiency of an oil recovery process, being applied to a subterranean, viscous petroleum containing formation such as a tar sand deposit involving the injection of a thermal recovery fluid such as steam, heated air or hot water into an injection well to mobilize and displace petroleum toward a production well is improved by drilling a series of secondary injection wells or pressurization wells around the production wells. Unheated air is injected into the secondary injection wells at a pressure from about 10% to about 90% and preferably around 50% of the pressure at which the thermal recovery fluid is being injected into the central injection wells. A pressure gradient is maintained around the production wells which confines the mobilized petroleum and the thermal recovery fluid to the intended pattern. A low temperature oxidation reaction also occurs as a consequence of the unheated air injection which pretreats petroleum in the formation between the air pressurization wells and the production wells so that the next phase of oil recovery is improved.

    Abstract translation: 油回收方法的效率被应用于地下粘稠的含石油的地层，例如焦油砂沉积物，其涉及将诸如蒸汽，加热的空气或热水的热回收流体注入注入井以调动和取代石油 通过在生产井周围钻一系列二次注入井或加压井来改善生产井。 未加热的空气以约10％至约90％的压力注入二次注入井中，优选将热回收流体注入中心注入井的压力的约50％。 在生产井周围保持压力梯度，将压实的石油和热回收液体限制在预期的模式。 由于在空气加压井和生产井之间的地层中预处理石油的未加热空气注入的结果，也发生低温氧化反应，从而提高下一阶段的回油。

    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。

    Core drilling apparatus with means to indicate amount of core in barrel
    7.
    发明授权
    Core drilling apparatus with means to indicate amount of core in barrel 失效
    核心钻孔设备意味着显示棒中的核心数量

    公开(公告)号：US3605920A

    公开(公告)日：1971-09-20

    申请号：US3605920D

    申请日：1969-12-30

    Applicant: TEXACO INC

    Inventor： WOODWARD CHARLES D

    IPC: E21B25/00 ,  E21B45/00

    CPC classification number: E21B25/00

    Abstract: THE CORE BARREL OF A CORE DRILL HAS LONGITUDINALLY SPACED PORTS IN ITS SIDEWALLS AND A PLUG SLIDABLE IN THE BARREL. AS THE CORE ENTERS THE BARREL IT RAISES THE PLUG. BLOCKING THE PORTS IN TURN AND THUS PRODUCING PRESSURE CHANGES OR ANOMALIES IN THE DRILLING FLUID INDICATIVE OF THE AMOUNT OF CORE IN THE BARREL.

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