公开(公告)号：US20050247119A1

公开(公告)日：2005-11-10

申请号：US11092016

申请日：2005-03-29

申请人： Rocco DiFoggio ,  Arnold Walkow ,  Paul Bergren ,  Peter Reittinger

发明人： Rocco DiFoggio ,  Arnold Walkow ,  Paul Bergren ,  Peter Reittinger

IPC分类号： E21B41/00 ,  E21B47/10 ,  E21B49/10 ,  G01N9/00 ,  G01N11/16 ,  G01N33/24 ,  E21B44/00

CPC分类号： G01N33/24 ,  E21B49/10 ,  E21B2049/085 ,  G01N9/002 ,  G01N11/16 ,  G01N2009/006 ,  G01V3/32

摘要： The present invention provides a downhole method and apparatus using a flexural mechanical resonator, for example, a tuning fork to provide real-time direct measurements and estimates of the viscosity, density and dielectric constant of formation fluid or filtrate in a hydrocarbon producing well. The present invention additionally provides a method and apparatus for monitoring cleanup from a leveling off of viscosity or density over time, measuring or estimating bubble point for formation fluid, measuring or estimating dew point for formation fluid, and determining the onset of asphaltene precipitation. The present invention also provides for intercalibration of plural pressure gauges used to determine a pressure differential downhole. A hard or inorganic coating is placed on the flexural mechanical resonator (such as a tuning fork) to reduce the effects of abrasion from sand particles suspended in the flowing fluid in which the flexural mechanical resonator is immersed.

摘要翻译： 本发明提供了一种使用弯曲机械谐振器（例如音叉）的井下方法和装置，以提供实时直接测量和估算烃生产井中地层流体或滤液的粘度，密度和介电常数。 本发明另外提供了一种用于从随着时间的粘度或密度的平滑化来测量清理的方法和装置，测量或估计地层流体的起泡点，测量或估计地层流体的露点，以及确定沥青质沉淀的开始。 本发明还提供用于确定井下压力差的多个压力计的相互校准。 将硬质或无机涂层放置在弯曲机械谐振器（例如音叉）上，以减少悬浮在其中浸入弯曲机械谐振器的流动流体中的砂粒磨损的影响。

公开(公告)号：US20070095535A1

公开(公告)日：2007-05-03

申请号：US11262644

申请日：2005-10-31

申请人： Rocco DiFoggio ,  Christopher Powell ,  Peter Reittinger ,  Louis Perez ,  Srdjan Stankovic ,  Paul Bergren

发明人： Rocco DiFoggio ,  Christopher Powell ,  Peter Reittinger ,  Louis Perez ,  Srdjan Stankovic ,  Paul Bergren

IPC分类号： E21B36/00 ,  E21B43/24

CPC分类号： E21B47/10 ,  E21B49/10 ,  G01N11/16 ,  G01N2009/006

摘要： A method and apparatus are provided for insulating electrical connections to a resonator from fluid downhole under extreme pressure and temperature conditions downhole. The method and apparatus provide a pliable insulator that maintains electrical isolation between a resonator electrical connection during exposure to high pressures downhole. The insulator is substantially chemically non reactive so that the insulator maintains electrical isolation between the resonator electrical connections during exposure to fluids downhole. The insulator has a thermal coefficient of expansion in a range so that the insulator maintains electrical isolation between the resonator electrical connections during exposure to high temperatures downhole.

摘要翻译： 提供了一种方法和装置，用于在井下的极端压力和温度条件下将流体井下绝缘体与谐振器绝缘。 该方法和装置提供了一种柔韧的绝缘体，其在暴露于井下的高压下时在谐振器电连接之间保持电隔离。 绝缘子基本上是化学上无反应的，使得绝缘体在暴露于井下的流体之前在谐振器电连接之间保持电隔离。 绝缘体具有在一定范围内的热膨胀系数，使得绝缘体在暴露于井下高温期间在谐振器电连接之间保持电隔离。

公开(公告)号：US07317989B2

公开(公告)日：2008-01-08

申请号：US10801267

申请日：2004-03-16

申请人： Rocco DiFoggio ,  Peter Reittinger

发明人： Rocco DiFoggio ,  Peter Reittinger

IPC分类号： G01H3/04 ,  G01H3/14

CPC分类号： E21B49/08 ,  E21B47/10 ,  E21B49/10 ,  E21B2041/0028 ,  G01N9/002 ,  G01N11/16 ,  G01N33/24 ,  G01N2009/006 ,  G01V3/32

摘要： The present invention provides a chemometric equation to estimate fluid density, viscosity, dielectric constant and resistivity for a formation fluid sample downhole. The chemometric estimates can be used directly as estimated values for fluid density, viscosity, dielectric constant and resistivity for a formation fluid sample downhole. The chemometric estimates can also be plugged into a Levenberg-Marquardt (LM) non-linear least squares fit, as an initial estimate of the parameter to be estimated by the LM fit. If the initial parameter estimate is too far from the actual parameter values, the LM algorithm may take a long time to converge or even fail to converge entirely. The present invention estimates an initial value of a parameter that provides a high probability that the LM algorithm will converge to a global minimum.

摘要翻译： 本发明提供了一种用于估计井下地层流体样品的流体密度，粘度，介电常数和电阻率的化学计量方程式。 化学计量估计可以直接用作井下地层流体样品的流体密度，粘度，介电常数和电阻率的估计值。 化学计量估计也可以插入到Levenberg-Marquardt（LM）非线性最小二乘拟合中，作为通过LM拟合估计的参数的初始估计。 如果初始参数估计与实际参数值太远，则LM算法可能需要很长时间才能收敛甚至不能完全收敛。 本发明估计提供LM算法收敛到全局最小值的高概率的参数的初始值。

公开(公告)号：US20050122839A1

公开(公告)日：2005-06-09

申请号：US10992797

申请日：2004-11-19

申请人： Rocco DiFoggio ,  Peter Reittinger

发明人： Rocco DiFoggio ,  Peter Reittinger

IPC分类号： G01V1/16 ,  G01V1/42 ,  G01V1/46 ,  G01V1/00 ,  E21B49/00 ,  G04F13/00 ,  G04F13/02 ,  H03B17/00

CPC分类号： G01V1/16 ,  G01V1/46

摘要： A system and method for acquiring seismic data are disclosed. The system comprises a controller for causing the generation of a seismic signal, where the controller has a first clock used for time-stamping a record of the generated seismic signal. A seismic receiver is deployed in a wellbore so as to detect the generated seismic signal. An atomic clock is disposed in or with the seismic receiver for time-stamping a record of the detected seismic signal. The atomic clock is synchronized with the first clock prior to being placed downhole.

公开(公告)号：US20070113639A1

公开(公告)日：2007-05-24

申请号：US11588827

申请日：2006-10-27

申请人： Rocco DiFoggio ,  Peter Reittinger

发明人： Rocco DiFoggio ,  Peter Reittinger

IPC分类号： E21B47/00

CPC分类号： E21B49/08

摘要： A method and apparatus for estimating a property of a fluid downhole are disclosed. The apparatus includes a coated flexural resonator disposed in the downhole fluid. The resonator is coated to reduce effects of adhering surfactants suspended in the downhole fluid. The method uses the coated resonator to estimate a property of the downhole fluid.

摘要翻译： 公开了一种用于估计井下液体的性质的方法和装置。 该装置包括设置在井下流体中的涂覆的弯曲谐振器。 涂覆谐振器以减少粘附在井下流体中的表面活性剂的影响。 该方法使用涂覆的谐振器估计井下流体的性质。