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    Petrophysical interpretation of multipass array resistivity data obtained while drilling
    52.
    发明授权
    Petrophysical interpretation of multipass array resistivity data obtained while drilling 有权
    在钻探时获得的多次阵列电阻率数据的岩石物理解释

    公开(公告)号：US07555390B2

    公开(公告)日：2009-06-30

    申请号：US11854320

    申请日：2007-09-12

    申请人： Terizhandur S. Ramakrishnan

    发明人： Terizhandur S. Ramakrishnan

    IPC分类号： G01V1/40 ,  E21B49/00

    CPC分类号： G01V3/38 ,  A61B17/0057 ,  A61B17/0218 ,  A61B2017/00557 ,  A61B2017/00637 ,  A61B2017/00659 ,  A61F2/0063

    摘要： Resistivity measurements at different radial depths of investigation obtained from time lapse resistivity data gained from multiple passes of a resistivity tool through a borehole are analyzed together to obtain indications of at least one of fractional flow, residual oil and water saturations, oil saturation, and water saturation in a formation. For each of the logging passes having resistivity measurements with multiple radial depths of investigation, filtrate loss into the formation is also obtained through joint inversion.

    摘要翻译： 在电阻率工具通过钻孔的多次通过时间流逝的电阻率数据获得的不同径向深度的电阻率测量被一起分析，以获得分数流，残余油和水饱和度，油饱和度和水中的至少一个的指示 地层饱和。 对于具有具有多个径向深度的电阻率测量的每个采伐通道，通过联合反转也可以获得进入地层的滤液损失。

    Method for exploitation of gas hydrates
    53.
    发明授权
    Method for exploitation of gas hydrates 有权
    天然气水合物开采方法

    公开(公告)号：US07165621B2

    公开(公告)日：2007-01-23

    申请号：US10915269

    申请日：2004-08-10

    申请人： Joseph A. Ayoub ,  Stuart I. Jardine ,  Terizhandur S. Ramakrishnan

    发明人： Joseph A. Ayoub ,  Stuart I. Jardine ,  Terizhandur S. Ramakrishnan

    IPC分类号： E21B43/00 ,  E21B36/00

    CPC分类号： E21B41/0064 ,  E21B43/24 ,  E21B2043/0115 ,  Y02C10/14

    摘要： A method and apparatus for producing gas from a hydrate formation includes the use of at least one wellbore which penetrates the hydrate formation and further extends into an aquifer below the hydrate formation. The aquifer provides relatively warm water which may be produced up and into the hydrate formation thereby causing the release of gas from the hydrate. Suitable flow control and monitoring equipment may be included to control the flow of water produced from the aquifer and gas produced from the hydrate formation.

    摘要翻译： 用于从水合物生成气体的方法和装置包括使用穿透水合物形成的至少一个井眼，并进一步延伸到水合物层下面的含水层中。 含水层提供相对温暖的水，其可以产生并进入水合物形成，从而引起来自水合物的气体的释放。 可以包括合适的流量控制和监测设备以控制由含水层产生的水的流量和从水合物形成产生的气体。

    Formation fluid characterization using flowline viscosity and density data an oil-based mud environment
    54.
    发明授权
    Formation fluid characterization using flowline viscosity and density data an oil-based mud environment 有权
    使用流线粘度和密度数据的地层流体表征油基泥土环境

    公开(公告)号：US07134500B2

    公开(公告)日：2006-11-14

    申请号：US10741078

    申请日：2003-12-19

    申请人： Terizhandur S. Ramakrishnan ,  Soraya Sofia Betancourt

    发明人： Terizhandur S. Ramakrishnan ,  Soraya Sofia Betancourt

    IPC分类号： E21B43/00

    CPC分类号： E21B47/10 ,  G01N9/36 ,  G01N11/00 ,  G01N33/2823

    摘要： A method for characterizing formation fluid using flowline viscosity and density data in an oil-based mud environment includes: making an initial estimate of the density and viscosity of the individual components of the sampled fluid; measuring the volume fractions, density, and viscosity of the total mixture of formation fluid; computing the density and viscosity of the total mixture using the estimate and the measured volume fractions; comparing the computed values with the measured values; and updating the estimate based on the comparison until convergence. The process is repeated as additional data are acquired until the converged computed values differ only by an acceptable amount.

    摘要翻译： 在油基泥浆环境中使用流线粘度和密度数据表征地层流体的方法包括：初步估计取样流体的各个组分的密度和粘度; 测量地层流体总混合物的体积分数，密度和粘度; 使用估计和测量的体积分数计算总混合物的密度和粘度; 将计算值与测量值进行比较; 以及基于比较直到收敛来更新所述估计。 随着附加数据被获取，重复该过程，直到收敛的计算值不同于可接受的量。

    Apparatus and methods for canceling the effects of fluid storage in downhole tools
    55.
    发明授权
    Apparatus and methods for canceling the effects of fluid storage in downhole tools 有权
    用于消除井下工具中液体储存影响的装置和方法

    公开(公告)号：US07013723B2

    公开(公告)日：2006-03-21

    申请号：US10460841

    申请日：2003-06-13

    申请人： Terizhandur S. Ramakrishnan ,  Syed Tariq ,  Thomas H. Zimmerman

    发明人： Terizhandur S. Ramakrishnan ,  Syed Tariq ,  Thomas H. Zimmerman

    IPC分类号： E21B47/10

    CPC分类号： E21B49/008

    摘要： The effects of storage on the interpretation of data obtained at observation probes of a borehole tool are eliminated by controlling the storage volumes relative to the observation probes. For a homogeneous medium, the effect of storage on the interpretation of data is eliminated by causing the flow line volumes connected to each observation probe to be equal to each other. For a heterogeneous medium, the effect of storage on the interpretation of data is eliminated by causing the flow line volumes to vary in proportion to the relative permeabilities of the strata of the heterogeneous medium adjacent the probes. The borehole tool is provided with mechanisms for conducting flow line volume adjustment.

    摘要翻译： 通过控制相对于观察探针的存储体积来消除储存对钻孔工具的观察探针获得的数据解释的影响。 对于均匀介质，通过使连接到每个观测探针的流动线体积彼此相等来消除存储对数据解释的影响。 对于非均相介质，通过使流动线体积与邻近探针的非均相介质层的相对渗透率成比例地变化来消除储存对数据解释的影响。 钻孔工具设有用于进行流量调节的机构。

    Oilfield analysis systems and methods
    56.
    发明授权
    Oilfield analysis systems and methods 有权
    油田分析系统和方法

    公开(公告)号：US06829570B1

    公开(公告)日：2004-12-07

    申请号：US09712491

    申请日：2000-11-14

    申请人： Raj Kumar Michael Thambynayagam ,  Peter G. Tilke ,  Ian D. Bryant ,  Francois M. Auzerais ,  Nicholas N. Bennett ,  Terizhandur S. Ramakrishnan

    发明人： Raj Kumar Michael Thambynayagam ,  Peter G. Tilke ,  Ian D. Bryant ,  Francois M. Auzerais ,  Nicholas N. Bennett ,  Terizhandur S. Ramakrishnan

    IPC分类号： G06G748

    CPC分类号： G01V11/00 ,  Y10S707/99945

    摘要： An oilfield data analysis system is based on a four-tier software model which includes a “shared earth model” and a federation of “directory services”. The first tier is a universal graphical user interface (GUI) which can operate on any inexpensive computer as well as on an expensive workstation, i.e. a “web browser”. The second tier is an application server which is coupled to users via the worldwide web and serves geoscientific software applications. The third tier is a geometric modelling system where geometric data is stored and processed. The third tier embodies the “shared earth model”. The fourth tier is a database management system where non-geometric data is stored. According to the invention, there can be (and preferably are) multiple instances of each tier. Communication of data between different tiers is accomplished via XML data exchange. According to a presently preferred embodiment, the geoscience applications served by the second tier are written as JAVA servlets and applications may communicate with each other without human direction by registering requests with “directory services”. Applications interested in certain types of data “listen” for “data events” being registered with directory services. The cost of utilizing an application can be based on a time-rental billing operation which is carried out automatically via directory services.

    摘要翻译： 油田数据分析系统基于四层软件模型，包括“共享地球模型”和“目录服务”联合体。 第一层是通用图形用户界面（GUI），其可以在任何廉价的计算机以及昂贵的工作站（即“web浏览器”）上操作。 第二层是通过全球网络耦合到用户的应用服务器，并提供地球科学软件应用。 第三层是几何建模系统，几何数据被存储和处理。 第三层体现了“共享地球模式”。 第四层是存储非几何数据的数据库管理系统。 根据本发明，可以（并且优选地）每层的多个实例。 通过XML数据交换实现不同层之间的数据通信。 根据目前优选的实施例，由第二层服务的地球科学应用程序被写为JAVA小服务程序，应用程序可以通过向“目录服务”注册请求而无需人为方向来彼此通信。 对某些类型的数据感兴趣的应用程序“监听”目录服务中注册的“数据事件”。 利用应用程序的成本可以基于通过目录服务自动执行的时间租赁计费操作。

    Model based inversion of seismic response for determining formation properties
    58.
    发明授权
    Model based inversion of seismic response for determining formation properties 有权
    用于确定地层性质的地震反应的基于模型的反演

    公开(公告)号：US09542508B2

    公开(公告)日：2017-01-10

    申请号：US13882423

    申请日：2011-10-28

    申请人： Yusuf Altundas ,  Terizhandur S. Ramakrishnan ,  Satish C. Singh ,  Manuel Queiser ,  Junlun Li

    发明人： Yusuf Altundas ,  Terizhandur S. Ramakrishnan ,  Satish C. Singh ,  Manuel Queiser ,  Junlun Li

    IPC分类号： G06G7/48 ,  G06F17/50 ,  G01V1/28 ,  G01V1/30

    CPC分类号： G06F17/5009 ,  G01V1/282 ,  G01V1/30 ,  G01V2210/614 ,  G01V2210/67

    摘要： A method for characterizing a property of a subterranean formation including collecting well log and seismic data, inverting the data, processing for upscaled petrophysical parameters, constructing a flow model that generates saturation, pressure and temperature, constructing seismic velocity relationships from the results of the flow model, and constructing a seismic model. Some embodiments may form a full waveform model or a ray tracing model. Some embodiments may generate a velocity profile and/or waveforms using the profile. Some embodiments may use the parameters to form a reservoir model or to recover hydrocarbons from the formations. Some embodiments build a reservoir model of CO2 injection or CO2 presence after injection or for simulating CO2 presence in a subterranean formation. Some embodiments may also quantify CO2 properties in the reservoir or predict CO2 profile evolution over time in the reservoir including spatial distribution. Some embodiments may also predict CO2 profile evolution over time in a reservoir and risk assessment, estimate storage capacity of the reservoir, or select a storage site. Some additional embodiments may also predict fluid front arrival, fluid front monitoring, fluid movement monitoring, or injectivity. Some additional embodiments may generate saturation profiles or a pressure.

    摘要翻译： 一种用于表征地下地层的属性的方法，包括收集测井和地震数据，翻转数据，处理放大的岩石物理参数，构建产生饱和度，压力和温度的流动模型，从流动结果构建地震速度关系 模型，构建地震模型。 一些实施例可以形成全波形模型或光线跟踪模型。 一些实施例可以使用简档生成速度分布和/或波形。 一些实施例可以使用参数来形成储层模型或从地层中回收碳氢化合物。 一些实施例构建注射后的CO2注入或CO 2存在的储层模型或用于模拟在地层中的CO 2存在。 一些实施方案还可以量化储层中的CO 2特性或预测包含空间分布在内的储层中随时间的CO 2分布演变。 一些实施例还可以预测储层中随时间的CO 2分布演变和风险评估，估计储层的储存容量或选择储存地点。 一些额外的实施例还可以预测流体前端到达，流体前端监测，流体运动监测或注射性。 一些额外的实施例可以产生饱和曲线或压力。

    Dual or twin-well completion with wettability alteration for segregated oil and water production
    60.
    发明授权
    Dual or twin-well completion with wettability alteration for segregated oil and water production 有权
    双重或双井完井，对于分离的油和水的生产，可以改善润湿性

    公开(公告)号：US09291046B2

    公开(公告)日：2016-03-22

    申请号：US13191995

    申请日：2011-07-27

    申请人： Terizhandur S. Ramakrishnan ,  Paul S. Hammond ,  John M. Cook

    发明人： Terizhandur S. Ramakrishnan ,  Paul S. Hammond ,  John M. Cook

    IPC分类号： E21B43/38

    CPC分类号： E21B43/38 ,  E21B43/385

    摘要： A well completion and related method are provided for formations susceptible to simultaneous production of oil and water. In one embodiment, two closely spaced, preferably horizontal wellbores are drilled from a single well into the reservoir. The reservoir rock surrounding one leg (typically the upper leg) is chemically treated to make it hydrophobic, whereas the reservoir rock surrounding the other leg is chemically treated to make it hydrophilic. Separate production tubing and a dual completion is installed in order to enable independent flow from each leg. Drawdown pressures in both legs are controlled to be sufficiently close to each other such that only oil flows into one leg and only water into the other. The water produced is re-injected downhole or brought to the surface.

    摘要翻译： 为易于同时生产油和水的地层提供完井和相关方法。 在一个实施例中，将两个紧密间隔的，优选水平的井筒从单井钻入储存器。 围绕一条腿（通常是大腿）的储层岩石被化学处理以使其疏水，而围绕另一条腿的储层岩石被化学处理以使其亲水。 安装独立的生产管道和双重完井，以实现每条腿的独立流动。 控制两条腿中的压降压力彼此足够接近，使得只有油流入一条腿并且只有水流入另一条腿。 产生的水重新注入井下或带到地面。