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| Number | Title | Issue Date |
| 7874358 | Method for oil sand exploration and development The invention provides a method of locating, in terrain containing oil sand deposits and also containing shale, clean oil sands deposits (i.e. those not containing significant shale) which are large enough for economic exploitation. The method includes flying a high... | 01/25/2011 |
| 7364007 | Integrated acoustic transducer assembly Acoustic transducers configured with integrated electronics technology are adapted to digitize signal data close to the transducer. The transducers are packaged with a reduced number of elements and sealed for exposure to harsh environments, without oil compensation... | 04/29/2008 |
| 7356411 | Method for acquiring and interpreting transient electromagnetic measurements A method for interpreting transient electromagnetic survey data includes measuring transient response of a medium over a plurality of switching events. The measured transient response to a first one of the current switching events is modeled. Transient response to t... | 04/08/2008 |
| 7317260 | Wind flow estimation and tracking using tower dynamics A turbine control system for a variable speed electrical generator in a wind turbine mounted atop a support tower. The wind turbine converts wind energy into a driving torque applied to the generator. The control system includes a turbine support tower position sens... | 01/08/2008 |
| 7242637 | Time-lapse seismic survey of a reservoir region A method of investigating a reservoir region in a subsurface formation by a time-lapse seismic survey. The subsurface formation comprises a further formation region adjacent to the reservoir region. Data are obtained from a time-lapse seismic survey and includes sei... | 07/10/2007 |
| 7207395 | Method and system for testing a partially formed hydrocarbon well for evaluation and well planning refinement A method and system for testing a partially formed well includes forming a first well bore intersecting a subterranean formation. The first well bore includes a portion of a planned well having a first configuration. A production characteristic of the subterranean f... | 04/24/2007 |
| 7204308 | Borehole marking devices and methods To reduce the surveying error in a wellbore, the creation of several reference points within a borehole is carried out by physically placing borehole markers in the borehole casing, the borehole wall or in the formation itself, and providing an accurate reference of... | 04/17/2007 |
| 7174254 | Mud gas isotope logging interpretative process utilizing mixing lines in oil and gas drilling operations The present invention is a method of interpreting sampled mud gas compositional and isotopic data from a target area in a drilling operation. The compositional and isotopic data is plotted on a chart. The chart preferably illustrates methane compositional data toget... | 02/06/2007 |
| 7162918 | Method and apparatus for downhole fluid characterization using flexural mechanical resonators 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 i... | 01/16/2007 |
| 7137446 | Fluids comprising reflective particles and methods of using the same to determine the size of a wellbore annulus In embodiments, methods of determining a size of an annulus in a wellbore include: (a) displacing a fluid comprising reflective particles downhole and up through the annulus, wherein the reflective particles make a front end of the fluid visible as it exits the well... | 11/21/2006 |
| 7090012 | Method and apparatus for subsurface fluid sampling The apparatuses and methods herein relate to techniques for extracting fluid from a subsurface formation. A downhole sampling tool is provided with a probe having an internal wall capable of selectively diverting virgin fluids into virgin flow channels for sampling,... | 08/15/2006 |
| 7027354 | Method of obtaining pore pressure and fluid saturation changes in subterranean reservoirs by forward modeling Representative embodiments provide for a computer including a program code configured to cause a processor to invert and thereafter calibrate first and second data sets, subtract the inverted second data set from the inverted first data set to derive a time-lapse da... | 04/11/2006 |
| 7012852 | Method, apparatus and system for detecting seismic waves in a borehole A method, apparatus and system for detecting seismic waves. A sensing apparatus is deployed within a bore hole and may include a source magnet for inducing a magnetic field within a casing of the borehole. An electrical coil is disposed within the magnetic field to ... | 03/14/2006 |
| 6986389 | Adjustable deployment apparatus for an actively clamped tubing-conveyed in-well seismic station The present invention generally relates to an apparatus and method for seismic monitoring. In one aspect, an apparatus for acoustically coupling a sensor mechanism to a surface in a wellbore is provided. The apparatus includes a mandrel disposable in a tubing string... | 01/17/2006 |
| 6980940 | Intergrated reservoir optimization A method of managing a fluid or gas reservoir is disclosed which assimilates diverse data having different acquisition time scales and spatial scales of coverage for iteratively producing a reservoir development plan that is used for optimizing an overall performanc... | 12/27/2005 |
| 6898149 | Reprogrammable downhole telemetry and control system A reprogrammable data communications system for use in a gas or oil well borehole is disclosed. The borehole includes a casing and a piping structure therein and at least one downhole equipment module located therein. The system provides for data and control signals... | 05/24/2005 |
| 6814167 | Boring device and boring method A boring device for producing a bore with a casing tube has a linkage, a boring tool, which can be fixed to the lower end of the linkage, a mounting frame for mounting on the casing tube, a drive and a connecting device, which is used for producing a rotary connecti... | 11/09/2004 |
| 6747914 | Use of minor borehole obstructions as seismic sources An acoustic system and method for monitoring a hydrocarbon reservoir. Wellbore tube wave energy may be created by natural or ambient sources or tube waves may be excited intentionally. Wellbore tube wave energy is converted to seismic body wave energy at minor boreh... | 06/08/2004 |
| 6715551 | Apparatus and methods for applying time lapse VSP to monitor a reservoir Subterranean reservoir monitoring method, computer system with programming code for implementing the method, and computer readable media and data signal embodying such programming code, the method including one or more of: (a) reservoir screening; (b) reservoir mode... | 04/06/2004 |
| 6712140 | 3rd borehole radar antenna and algorithm, method and apparatus for subsurface surveys The invention relates to a borehole radar tool comprising, in a housing (2) a transmitting antenna and a receiving antenna both of which comprise, near the housing wall (2), a dipole antenna (8) and a reflector (10) opposite thereto. Also... | 03/30/2004 |
| 6619393 | Method for locating oil wells The present invention relates to a method whereby two well locations are employed to find a distribution of points where additional well locations can be found. The distribution of points form an arc defined as a trap slice. This distribution is determine... | 09/16/2003 |
| 6618695 | Method for gradually deforming a stochastic model of a heterogeneous medium such as an underground zone Method for gradually deforming, totally or locally, a Gaussian or similar type stochastic model of a heterogeneous medium such as an underground zone, constrained by a series of parameters relative to the structure of the medium. The method comprises draw... | 09/09/2003 |
| 6581685 | Method for determining formation characteristics in a perforated wellbore A method for determining the characteristics of a subterranean formation penetrated by an existing or drilled well is disclosed. The method uses a mathematical model to estimate formation parameters as fluid exits the formation through a hole and into the... | 06/24/2003 |
| 6534986 | Permanently emplaced electromagnetic system and method for measuring formation resistivity adjacent to and between wells Systems and methods for determining characteristics of geologic formations between conductively lined wellbores. At least one transmitter is axially disposed at a selected depth in a first wellbore and is attached to an external surface of a conductive li... | 03/18/2003 |
| 6499344 | Apparatus and method to obtain representative samples of oil well production A well tester adapted to select among members of an oil well family to provide a purged and clean vessel to receive samples of well production that include gas and oil, and by selective use of production pressure and lease water under pressure, allow for ... | 12/31/2002 |
| 6321839 | Method of and probe for subsurface exploration A method and probe for detecting the concentration of a substance in a measurement region in a subsurface exploration wherein the electromagnetic energy is delivered to this region and picked up from this region via an optical fiber and the measurement is... | 11/27/2001 |
| 6273202 | Swab test for determining relative formation productivity The productivity of a formation is determined by stroking the drill bit up and down (swabbing) in the zone of interest for creating a suction in the wellbore and inducing the flow of hydrocarbons from the formation. The drilling mud 15 is first circulated... | 08/14/2001 |
| 6253848 | Method of obtaining improved geophysical information about earth formations The present invention provides a method for forming wellbores. In one method, one or more wellbores are drilled along preplanned paths based in part upon seismic surveys performed from the surface. An acoustic transmitter conveyed in such wellbores transm... | 07/03/2001 |
| 6230557 | Formation pressure measurement while drilling utilizing a non-rotating sleeve A downhole tool and method are provided for collecting data from a subsurface formation during drilling operations. The tool includes a tubular mandrel adapted for axial connection in a drill string positioned in a wellbore penetrating the subsurface form... | 05/15/2001 |
| 6216533 | Apparatus for measuring downhole drilling efficiency parameters A downhole drilling efficiency sensor (DES) apparatus for use with drilling operations in oil and gas exploration, that accurately measures important drilling parameters at or near the drill bit in order to increase the effectiveness and productivity of t... | 04/17/2001 |
| 6212948 | Apparatus and method to obtain representative samples of oil well production An apparatus and process for obtaining representative samples of fluids produced from one or more oil wells by means of a closed vessel chamber with lease water supply port connected to a lease water supply line, where a pressure sensor within such intern... | 04/10/2001 |
| 6206099 | Method for relating multiple oil or gas wells to each other A method of relating three or four producing wells in an existing fossil fuel drilling field utilizes the equation Y2 +X.multidot.Y-X2 =0. The independent variable X represents the distance between any two known producing wells in th... | 03/27/2001 |
| 6102115 | Integral standoff of induction sondes to minimize correction of borehole conductivity effects This disclosure sets out an induction logging tool enclosed in a cylindrical shell between top and bottom located end connected subs of larger diameter. The ends are larger; they define a standoff distance above a specified minimum to enable operation in ... | 08/15/2000 |
| 5947199 | Method of monitoring a mineral reservoir A method for monitoring production mineral reservoirs, the method comprising: permanently installing a geophone in a borehole; generating a first set of seismic waves; receiving a first set of seismic data with the geophone; recording the first set of dat... | 09/07/1999 |
| 5909772 | Apparatus and method for estimating liquid yield of a gas/condensate reservoir Apparatus and method for determining a liquid yield from a gas/condensate reservoir. The apparatus and method first determines the porosity at each depth of a reservoir, using open hole logging techniques, before the well within the reservoir is used for ... | 06/08/1999 |
| 5905036 | Characterization of organic contaminants and assessment of remediation performance in subsurface formations Characterization of organic contaminants in subsurface formation is performed by methods for detecting the presence of nonaqueous phase liquid in a subsurface formation, and for determining the composition and for determining the volume of nonaqueous phas... | 05/18/1999 |
| 5646342 | Method of Locating Hydrocarbon reserves A method of locating hydrocarbon reserves comprising: selecting on the basis of a hydrocarbon hypothesis from a region of interest below the surface of the earth patches having probabilities of containing hydrocarbon reserves greater than a predetermined ... | 07/08/1997 |
| 5585556 | Method and apparatus for performing measurements while drilling for oil and gas A method and equipment are described for performing measurements while drilling for oil or gas, in particular VSP-measurements employing a seismic source together with sensors such as hydrophones and/or geophones connected to a memory- and calculation dev... | 12/17/1996 |
| 5388456 | Procedure in order to detect the gas potential in sedimentary basins and the oil potential obtained from this Thermocatalytically generated gaseous hydrocarbons from gas or oil prone source rocks in subsiding sedimentary basins and those penetrating the seal of gas or oil accumulations at the surface reach the surface in geologically short times and in low concen... | 02/14/1995 |
| 5243562 | Method and equipment for acoustic wave prospecting in producing wells A method of installing a reception device in a cased well at an optimum depth for surveying a formation under production or a localized part thereof and a source of acoustic waves at the surface or in a well. A placing or setting of the device is achieved... | 09/07/1993 |
