METHOD FOR DETERMINING CHARACTERISTICS OF A GAS-OIL TRANSITION ZONE IN AN UNCASED WELL

    公开(公告)号:US20170107814A1

    公开(公告)日:2017-04-20

    申请号:US15299026

    申请日:2016-10-20

    CPC classification number: E21B49/088 E21B47/10 G01N33/241

    Abstract: The disclosure relates to methods of logging wells for gas capped oil reservoirs with a known mineral composition of constituent rocks. For determining characteristics of a gas-oil transition zone at least one sample of a reservoir fluid from a gas part and from an oil part of the reservoir are taken. Reservoir temperature and pressure are measured in places where the samples of the reservoir fluid are taken and densities and compositions of the samples are determined. The determined densities and compositions and the measured pressure and temperature are used to configure an equation of state of hydrocarbon mixtures. Porosity, water saturation and a total hydrogen content of a saturated rock are measured along the wellbore. A volume of hydrocarbon phases is computed from the measured values of porosity and water saturation of the saturated rock, and a hydrogen content of the hydrocarbon phases is determined from the measured values of the total hydrogen content of the saturated rock. Using the equation of state of hydrocarbon mixtures density and composition of the hydrocarbon phases along the wellbore are computed. A specific hydrogen content in gas and oil along the wellbore is determined from the computed values of density and composition of the hydrocarbon phases along the wellbore. Gas and oil saturation distribution along the wellbore is determined from the determined specific hydrogen content, determined hydrogen content of the hydrocarbon phases and the measured porosity.

    ENHANCED OIL RECOVERY USING DIGITAL CORE SAMPLE
    7.
    发明申请
    ENHANCED OIL RECOVERY USING DIGITAL CORE SAMPLE 审中-公开
    使用数字核心样品的增强油回收

    公开(公告)号:US20160063150A1

    公开(公告)日:2016-03-03

    申请号:US14784009

    申请日:2013-04-12

    CPC classification number: G06F17/5009 E21B25/00 E21B43/16 E21B49/00

    Abstract: Performing an enhanced oil recovery (EOR) injection operation in an oilfield having a reservoir may include obtaining a EOR scenarios that each include a chemical agent, obtaining a three-dimensional (3D) porous solid image of a core sample, and generating a 3D pore scale model from the 3D porous solid image. The core sample is a 3D porous medium representing a portion of the oilfield. The 3D pore scale model describes a physical pore structure in the 3D porous medium. Simulations are performed using the EOR scenarios to obtain simulation results by, for each EOR scenario, simulating, on the first 3D pore scale model, the EOR injection operation using the chemical agent specified by the EOR scenario to generate a simulation result. A comparative analysis of the simulation results is performed to obtain a selected chemical agent. Further, an operation is performed using the selected chemical agent.

    Abstract translation: 在具有储层的油田中进行增强的采油(EOR)注入操作可以包括获得每个包括化学试剂的EOR场景,获得核心样品的三维(3D)多孔固体图像,以及产生3D孔 从3D多孔固体图像的尺度模型。 核心样品是表示油田部分的3D多孔介质。 3D孔隙尺度模型描述了3D多孔介质中的物理孔结构。 使用EOR情景进行模拟,以获得模拟结果,对于每个EOR场景,在第一3D孔径尺度模型上模拟使用由EOR场景指定的化学试剂产生模拟结果的EOR注入操作。 进行模拟结果的比较分析以获得选定的化学试剂。 此外,使用所选择的化学试剂进行操作。

    Method for determining characteristics of a gas-oil transition zone in an uncased well

    公开(公告)号:US10309219B2

    公开(公告)日:2019-06-04

    申请号:US15299026

    申请日:2016-10-20

    Abstract: In order to determine characteristics of a gas-oil transition zone in a gas capped oil reservoir, samples of a reservoir fluid from a gas and an oil part of the reservoir are taken. To configure an equation of state of hydrocarbon mixtures, reservoir temperature and pressure are measured in places where the samples of the reservoir fluid are taken and densities and compositions of the samples are determined. Porosity, water saturation and total hydrogen content of a saturated rock are measured along the wellbore and a volume and a hydrogen content of hydrocarbon phases are determined. Using the equation of state, density and composition of the hydrocarbon phases are computed and a specific hydrogen content in gas and oil along the wellbore is determined. Gas and oil saturation distribution along the wellbore is determined from the determined specific hydrogen content, determined hydrogen content of the hydrocarbon phases and the measured porosity.

    Construction Of Digital Representation Of Complex Compositional Fluids
    10.
    发明申请
    Construction Of Digital Representation Of Complex Compositional Fluids 审中-公开
    复杂组成流体数字表示的构建

    公开(公告)号:US20160319640A1

    公开(公告)日:2016-11-03

    申请号:US15102271

    申请日:2014-11-25

    Abstract: A method for performing a simulation of a field having a subterranean formation is described. The method includes obtaining phase behavior data of subterranean fluids of the field, generating an equation of state (EOS) model of the fluids based on the phase behavior data, generating a Helmholtz free energy model that reproduces predictions of the EOS model over a pre-determined pressure and temperature range, and performing the simulation of the field using the Helmholtz free energy model. The method may further include reducing the EOS model to a reduced EOS model having a reduced number of components to represent the EOS model over a pre-determined pressure and temperature range, generating the Helmholtz free energy model based on the reduced EOS model, and obtaining and using phase behavior data of injection fluids used. A computer system data.

    Abstract translation: 描述了一种用于执行具有地层的场的模拟的方法。 该方法包括获得该场的地下流体的相位行为数据,基于相位行为数据产生流体的状态方程(EOS)模型,产生一个亥姆霍兹自由能模型,该模型在一预定时间内再现EOS模型的预测, 确定的压力和温度范围,并使用亥姆霍兹自由能模型进行场的模拟。 该方法可以进一步包括将EOS模型减少到具有减少的部件数量的减少的EOS模型,以在预定的压力和温度范围内表示EOS模型,基于减少的EOS模型产生亥姆霍兹自由能模型,并获得 并使用注射液的相位行为数据。 计算机系统数据。

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