| Patent Number |
Title Of Patent |
Date Issued |
| 7348781 |
Apparatus for electromagnetic logging of a formation |
March 25, 2008 |
| A tool for electromagnetic logging of a formation includes a tool body configured to move in a borehole penetrating the formation; an antenna array disposed on the tool body; and an electronic unit configured to control operation of the antenna array, wherein the antenna array compri |
| 7154411 |
Reservoir management system and method |
December 26, 2006 |
| A remote sensing unit for sensing subsurface formation is provided. The remote sensing unit is an active device with the capability of responding to control commands to determine subsurface formation characteristics, and transmitting corresponding data values. Some embodiments of the |
| 7095233 |
System, apparatus, and method of conducting borehole resistivity measurements |
August 22, 2006 |
| A logging-while-drilling tool is adapted for incorporation with a drill string having a longitudinal axis. The drill string is further adapted for drilling a wellbore penetrating a geological formation. The drilling tool includes a tool body having a central axis disposed in parallel |
| 7093672 |
Systems for deep resistivity while drilling for proactive geosteering |
August 22, 2006 |
| A method for geosteering while drilling a formation includes generating a plurality of formation models for the formation, where each of the plurality of the formation models includes a set of parameters and a resistivity tool therein and locations of the resistivity tool differ in t |
| 7073609 |
Apparatus and methods for imaging wells drilled with oil-based muds |
July 11, 2006 |
| A resistivity logging sensor for logging while drilling a well using an oil-based mud includes a sensor body; a first current injector electrode disposed on the sensor body, wherein the first current injector electrode is electrically insulated from the sensor body; at least two current |
| 6998844 |
Propagation based electromagnetic measurement of anisotropy using transverse or tilted magnetic |
February 14, 2006 |
| Transverse or tilted magnetic dipole antenna systems are used for electromagnetic logging measurements to determine the anisotropic resistivity of subsurface formations. Combined measurements between transverse or tilted antennas, as well as axial antennas, are used to compensate for |
| 6984983 |
System and method for evaluation of thinly laminated earth formations |
January 10, 2006 |
| A unique means in interpreting anisotropic reservoirs in thinly laminated earth formations regardless of the hole deviation is provided. A high-resolution micro-resistivity formation measurement is used to estimate in real time at the well site the formation anisotropic electrical pa |
| 6963803 |
System and method for analyzing a thin bed formation |
November 8, 2005 |
| One or more high resolution logs of a formation property having thin beds is provided for the laminated formation. From this log, the bed boundaries are detected and the facies for each of the beds detected is identified, using one or more high resolution logs of the laminated formation. |
| 6943697 |
Reservoir management system and method |
September 13, 2005 |
| An apparatus and a method for controlling oilfield production to improve efficiency includes a remote sensing unit that is placed within a subsurface formation, an antenna structure for transmitting power and communicating signals to the remote sensing unit and for receiving communic |
| 6856910 |
Method and apparatus for determining regional dip properties |
February 15, 2005 |
| A method for determining a formation dip angle including extracting features from an acquired well log to obtain a set of features, validating the set of features to obtain a subset of features, generating a layered model using the subset of features, and generating a synthetic log using |
| 6836218 |
Modified tubular equipped with a tilted or transverse magnetic dipole for downhole logging |
December 28, 2004 |
| Method and system for subsurface logging utilizing a modified metallic tubular having an elongated body with tubular walls and a central bore adapted to receive a support member. The tubular including slotted stations to provide through-tubular signal transmission and/or reception. P |
| 6822579 |
Steerable transceiver unit for downhole data acquistion in a formation |
November 23, 2004 |
| A method and apparatus for collecting data downhole in a well bore, even during drilling operations, are disclosed. The apparatus generally comprises an antenna and some associated electronic circuitry. The antenna includes a plurality of arrayed transceiver elements and the electronic |
| 6727705 |
Subsurface monitoring and borehole placement using a modified tubular equipped with tilted or tr |
April 27, 2004 |
| Systems and methods for monitoring a subsurface formation property and for placing a borehole in the vicinity of a well in the formation. A slotted tubular is utilized to provide through-tubular signal transmission and/or reception using an antenna adapted to generate a magnetic dipole m |
| 6693553 |
Reservoir management system and method |
February 17, 2004 |
| An apparatus and a method for controlling oilfield production to improve efficiency includes a remote sensing unit that is placed within a subsurface formation, an antenna structure for transmitting power and communicating signals to the remote sensing unit and for receiving communic |
| 6690170 |
Antenna structures for electromagnetic well logging tools |
February 10, 2004 |
| The invention refers to antenna configurations for electromagnetic logging tools. The antennas have one or more electrical conductors disposed on a dielectric substrate wrapped around a core or disposed directly on the core. The conductor or conductors are arranged such that the antenna |
| 6188222 |
Method and apparatus for measuring resistivity of an earth formation |
February 13, 2001 |
| The method and apparatus of the invention determines earth formation resistivity at extended depths into the formation by the use of telemetry transmission signals to measure the formation resistivity. The telemetry transmission signals carry measurement data from downhole sensors throug |
| 6070662 |
Formation pressure measurement with remote sensors in cased boreholes |
June 6, 2000 |
| The present invention relates to a method and apparatus for establishing communication in a cased wellbore with a data sensor that has been remotely deployed, prior to the installation of casing in the wellbore, into a subsurface formation penetrated by the wellbore. Communication is |
| 5963036 |
Well logging apparatus and method for determining properties of earth formations that have been |
October 5, 1999 |
| A method and apparatus is disclosed for determining the properties of formations surrounding an earth borehole that have been invaded by borehole fluid to form an invaded zone. Properties determined in one embodiment are invaded zone resistivity Rxo, diameter of invasion DI, and unin |
| 5900733 |
Well logging method and apparatus for determining downhole Borehole fluid resistivity, borehole |
May 4, 1999 |
| A well logging method and apparatus are disclosed for determining borehole corrected formation resistivity, borehole diameter, and downhole borehole fluid (mud) resistivity with improved accuracy. A logging device in the borehole transmits electromagnetic energy from a transmitter, which |
| 5574371 |
Method and apparatus for measuring mud resistivity in a wellbore including a probe having a bott |
November 12, 1996 |
| A logging apparatus is adapted to be disposed in a mud filled wellbore, and a measurement probe is connected to a bottom of a tool string of the logging apparatus. The measurement probe is adapted for measuring a resistivity of a mud in the mud filled wellbore. The measurement probe |
| 5461562 |
Method and apparatus for detecting and quantifying hydrocarbon bearing laminated reservoirs on a |
October 24, 1995 |
| A new interpretation system receives a low resolution log and a high resolution log from a well logging tool that is disposed in a wellbore which traverses a highly laminated formation and generates an output record medium which clearly illustrates and quantifies each layer of the pl |
| 5402069 |
Spontaneous potential measurement apparatus connected between metallic housings of a wellbore ap |
March 28, 1995 |
| A spontaneous potential (SP) sub is interconnected between two metallic housings of a wellbore apparatus and is lowered into a wellbore. A spontaneous potential (SP) of an earth formation trasversed by the wellbore is measured by the SP sub, and a log is generated from the sub which |
