公开(公告)号：US07715984B2

公开(公告)日：2010-05-11

申请号：US11935202

申请日：2007-11-05

申请人： Terizhandur S. Ramakrishnan ,  Bhavani Raghuraman

发明人： Terizhandur S. Ramakrishnan ,  Bhavani Raghuraman

IPC分类号： G01V1/28 ,  G01N15/08 ,  G06F19/00 ,  G06F17/40

CPC分类号： G01V1/40

摘要： It is shown that a pressure pulse originating in a well is correlated to a pulse observed at a distant well with a characteristic time. The correlation time is directly related to the diffusion time scale arising out of the pressure diffusion equation. The relationship is affected by the source-observer or observer-observer distance but the correction is small for large distances. In practice, further corrections have to be included for finite width pulses. For these pulses, a practical scheme for continuous permeability monitoring is presented.

摘要翻译： 示出了源自井的压力脉冲与在特征时间在远距离井处观察到的脉冲相关。 相关时间与压力扩散方程产生的扩散时间尺度直接相关。 该关系受到源观察者或观察者 - 观察者距离的影响，但是对于大距离而言，校正较小。 实际上，必须对有限宽度脉冲进行进一步的校正。 对于这些脉冲，提出了用于连续渗透率监测的实用方案。

公开(公告)号：US20090255669A1

公开(公告)日：2009-10-15

申请号：US12103027

申请日：2008-04-15

申请人： Cosan Ayan ,  Fikri John Kuchuk ,  Terizhandur S. Ramakrishnan ,  Thomas J. Neville ,  Raghu Ramamoorthy ,  Andrew Carnegie

发明人： Cosan Ayan ,  Fikri John Kuchuk ,  Terizhandur S. Ramakrishnan ,  Thomas J. Neville ,  Raghu Ramamoorthy ,  Andrew Carnegie

IPC分类号： E21B43/12

CPC分类号： E21B33/1243 ,  E21B49/008 ,  G01V3/32

摘要： An apparatus and method of measuring a parameter characteristic of a rock formation in an oil well is provided with a device for generating a sensing field within a volume of the rock formation and a device for causing a flow through the volume in the presence of the sensing field, further including sensors responsive to changes in the volume, wherein a sensor response is indicative of the amounts of fluid, particularly hydrocarbon and water saturations and irreducible hydrocarbon and water saturations. Measurements can be made before the flow affects the measuring volume and after onset of the flow through the measuring volume.

摘要翻译： 在油井中测量岩层的参数特征的装置和方法设置有用于在岩体的体积内产生感测场的装置和用于在存在感测的情况下使流体流过体积的装置 进一步包括响应于体积变化的传感器，其中传感器响应指示流体的量，特别是烃和水饱和度以及不可约的碳氢化合物和水饱和度。 测量可以在流量影响测量体积之前和流过测量体积的开始之后进行。

公开(公告)号：US20090250208A1

公开(公告)日：2009-10-08

申请号：US12098041

申请日：2008-04-04

申请人： Terizhandur S. Ramakrishnan ,  Nikita V. Chugunov ,  Andrew Duguid ,  John Tombari

发明人： Terizhandur S. Ramakrishnan ,  Nikita V. Chugunov ,  Andrew Duguid ,  John Tombari

IPC分类号： E21B47/06

CPC分类号： E21B47/0005

摘要： The permeability of the cement annulus surrounding a casing is measured by locating a tool inside the casing, placing a probe of the tool in contact with the cement annulus, measuring the change of pressure in the probe over time, where the change in pressure over time is a function of among other things, the initial probe pressure, the formation pressure, and the permeability, and using the measured change over time to determine an estimated permeability. The estimated permeability is useful in determining whether carbon dioxide can be effectively sequestered in the formation below or at the depth of measurement without significant leakage through the cement annulus.

摘要翻译： 通过将工具定位在壳体内部，将工具的探针放置在与水泥环面接触的位置，测量探头随时间变化的压力随时间的变化来测量壳体周围的水泥环的渗透性 是初始探针压力，地层压力和渗透率之间的函数，并且使用测量的随时间的变化来确定估计的渗透率。 估计的渗透率可用于确定二氧化碳是否可以有效地隔离在下方的地层或测量深度，而没有通过水泥环的显着泄漏。

公开(公告)号：US20080210420A1

公开(公告)日：2008-09-04

申请号：US12041576

申请日：2008-03-03

申请人： Terizhandur S. Ramakrishnan ,  Fikri John Kuchuk ,  Yusuf Bilgin Altundas ,  Lang Zhan

发明人： Terizhandur S. Ramakrishnan ,  Fikri John Kuchuk ,  Yusuf Bilgin Altundas ,  Lang Zhan

IPC分类号： E21B49/00

CPC分类号： G01V3/20

摘要： Methods and apparatus for improving the determination of at least one multiphase flow parameter of an earth formation comprising propagating within the formation a first salinity front, determining a first value of the at least one multiphase flow parameter, propagating in the formation a second salinity front and improving the determination of the at least one multiphase flow parameter from the first value for the at least one multiphase flow parameter and a saturation profile associated with the first and second salinity fronts within the formation.

摘要翻译： 一种用于改善地层中至少一个多相流参数的测定的方法和装置，包括在所述地层内传播第一盐度前沿，确定所述至少一个多相流参数的第一值，在所述地层中传播第二盐度前沿和 根据所述至少一个多相流参数的所述第一值和与所述地层内的所述第一和第二盐度前沿相关联的饱和曲线来改善所述至少一个多相流参数的确定。

公开(公告)号：US07263881B2

公开(公告)日：2007-09-04

申请号：US11007412

申请日：2004-12-08

申请人： Terizhandur S. Ramakrishnan

发明人： Terizhandur S. Ramakrishnan

IPC分类号： E21B47/08

CPC分类号： E21B49/10

摘要： A single probe system is utilized to quickly obtain uncontaminated formation fluid samples. The single probe includes an outer guard tube and an inner sampling tube which is slightly recessed relative to the outer tube such that the pressure at the front face of the probe is substantially uniform. Each tube is coupled to its own pump which controls the flow rate of the fluid moving through that tube. Knowing the size of the sampling tube relative to the size of the outer probe tube, and optionally based on relative viscosities of formation fluids and filtrates, the pumps are caused to generate a particular flow rate ratio through the tubes such that an appropriate pressure is maintained at the front face of the probe and such that the fluid flowing through the sampling tube is substantially uncontaminated.

摘要翻译： 利用单个探针系统快速获得未污染的地层流体样品。 单个探针包括外保护管和相对于外管稍微凹进的内采样管，使得探针前表面处的压力基本上均匀。 每个管连接到其自己的泵，其控制流过该管的流体的流速。 了解取样管的尺寸相对于外探针管的尺寸，并且可选地基于地层流体和滤液的相对粘度，使得泵通过管产生特定的流速比，从而保持适当的压力 在探针的前表面处，使得流过取样管的流体基本上没有污染。

公开(公告)号：US07000697B2

公开(公告)日：2006-02-21

申请号：US09992681

申请日：2001-11-19

申请人： Peter A. Goode ,  Rod Nelson ,  David Rossi ,  Terizhandur S. Ramakrishnan ,  Min-Yi Chen

发明人： Peter A. Goode ,  Rod Nelson ,  David Rossi ,  Terizhandur S. Ramakrishnan ,  Min-Yi Chen

IPC分类号： E21B47/00

CPC分类号： E21B47/011 ,  E21B49/10

摘要： A system that is usable with a subterranean well that has a casing includes an apparatus that is associated with production of fluid from the well and is located downhole in the well in a passageway of the casing. The system also includes a sensor that is located downhole near the apparatus in the passageway and is adapted to measure a characteristic of the formation fluids and rock located outside of the casing.

公开(公告)号：US06860325B2

公开(公告)日：2005-03-01

申请号：US10644497

申请日：2003-08-20

申请人： Terizhandur S. Ramakrishnan ,  Gary M. Oddie ,  Sam Smonian

发明人： Terizhandur S. Ramakrishnan ,  Gary M. Oddie ,  Sam Smonian

IPC分类号： E21B34/06 ,  E21B43/14 ,  E21B47/06 ,  E21B47/10 ,  E21B47/12 ,  G01F1/40

CPC分类号： E21B34/066 ,  E21B34/06 ,  E21B43/14 ,  E21B47/06 ,  E21B47/10 ,  E21B47/124 ,  G01F1/40

摘要： This invention comprises the use of a variable orifice valve as a flow controller and flow meter. Pressure measurements are taken upstream and downstream of the variable orifice valve by way of a differential pressure measurement mechanism. The differential pressure measurement mechanism may comprise two separate absolute pressure measurement devices or a single differential pressure measurement device. Flow rate through the valve is determined from the pressure drop across the valve. In wellbores having multiple zones, a variable orifice valve together with a differential pressure measurement mechanism may be deployed for each zone. The flow rate through each of the zones and at the surface can then be monitored and controlled.

摘要翻译： 本发明包括使用可变孔口阀作为流量控制器和流量计。 通过差压测量机构在可变孔口阀的上游和下游进行压力测量。 差压测量机构可以包括两个单独的绝对压力测量装置或单个差压测量装置。 通过阀门的流量由阀门上的压降决定。 在具有多个区域的孔眼中，可以为每个区域部署可变节流阀以及差压测量机构。 然后可以监测和控制通过每个区域和表面处的流量。

公开(公告)号：US06415864B1

公开(公告)日：2002-07-09

申请号：US09726294

申请日：2000-11-30

申请人： Terizhandur S. Ramakrishnan ,  Brindesh Dhruva ,  Raj Kumar Michael Thambynayagam ,  Min-Yi Chen ,  Peter A. Goode ,  Rod F. Nelson

发明人： Terizhandur S. Ramakrishnan ,  Brindesh Dhruva ,  Raj Kumar Michael Thambynayagam ,  Min-Yi Chen ,  Peter A. Goode ,  Rod F. Nelson

IPC分类号： E21B4704

CPC分类号： E21B47/042 ,  E21B43/32

摘要： A system for reservoir control. The system allows segregated production of fluids, e.g. water and oil, to control the fluid-fluid interface. Downhole sensors are utilized in providing data about the location of the interface. This permits the proactive monitoring and control of the interface prior to unwanted intermingling of fluids, e.g. oil and water, during production.

摘要翻译： 油藏控制系统。 该系统允许流体的分离生产，例如 水和油，以控制流体 - 流体界面。 井下传感器用于提供有关接口位置的数据。 这允许在流体的不想要的混合之前主动监测和控制界面，例如， 油和水，在生产过程中。

公开(公告)号：US20130297273A1

公开(公告)日：2013-11-07

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： G06F17/50

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。

公开(公告)号：US20130098604A1

公开(公告)日：2013-04-25

申请号：US13277868

申请日：2011-10-20

申请人： Terizhandur S. Ramakrishnan ,  Nikita Chugunov ,  Ram Sunder Kalyanaraman

发明人： Terizhandur S. Ramakrishnan ,  Nikita Chugunov ,  Ram Sunder Kalyanaraman

IPC分类号： E21B47/00 ,  E21B34/00

CPC分类号： E21B47/0005 ,  E21B49/06

摘要： A method for evaluating wellbore integrity including introducing a drill to a surface of a casing encompassing an annulus, enclosing the drill in a housing hydraulically isolating the surface, drilling through the casing and into cement surrounding the casing, observing a pressure of the fluid, and using the pressure observation and a drill position to evaluate a presence of a defect and a location of the defect. Apparatus for evaluating wellbore integrity including a probe comprising a drill, wherein the probe is hydraulically isolated from the wellbore, a valve that encompasses the drill, a pressure gauge to measure the pressure of the fluid within the housing, a pressure gauge to measure the pressure in the system outside the housing, and equipment to compare the pressure measurements and the position of the drill and to evaluate a presence and a location of the defect.

摘要翻译： 一种用于评估井眼完整性的方法，包括将钻孔引导到包围环形物的壳体的表面，将钻孔包围在液压地隔离表面的壳体中，钻穿套管并围绕套管观察流体的压力，以及 使用压力观察和钻头位置来评估缺陷的存在和缺陷的位置。 用于评估井眼完整性的装置，包括包括钻头的探针，其中探针与井眼液压隔离，包含钻头的阀，用于测量壳体内的流体压力的压力计，用于测量压力的压力计 在外壳外的系统中，以及比较压力测量和钻头位置并评估缺陷的存在和位置的设备。