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| Number | Title | Issue Date |
| 7784539 | Hydrocarbon recovery testing method A method of testing the response of a subterranean formation to a formation treatment is described including the injection of a treatment fluid and the production of formation fluids from two separate boreholes or two boreholes from a single well such that the treat... | 08/31/2010 |
| 7543636 | Diagnostic sleeve shifting tool A diagnostic tool which doubles as a sleeve shifting tool. The tool may include a diagnostic implement for measuring downhole conditions in a well such as flow-rate, pressure and temperature. Where the well includes a slidable or shiftable sleeve, the tool may be em... | 06/09/2009 |
| 7324929 | Method and system for simulating a hydrocarbon-bearing formation The invention is a method for simulating one or more characteristics of a multi-component, hydrocarbon-bearing formation into which a displacement fluid having at least one component is injected to displace formation hydrocarbons. The first step of the method is to ... | 01/29/2008 |
| 7248969 | Waterflood control system for maximizing total oil recovery A control system and method for determining optimal fluid injection pressure is based upon a model of a growing hydrofracture due to waterflood injection pressure. This model is used to develop a control system optimizing the injection pressure by using a prescribed... | 07/24/2007 |
| 7205762 | Downhole high resolution NMR spectroscopy with polarization enhancement An apparatus and method is discussed for characterizing a fluid sample downhole of aliphatic hydrocarbon compounds, aromatic hydrocarbon compound, or connate mud filtrates containing carbon-13 isotopes using an enhanced nuclear magnetic resonance (NMR) signal on a m... | 04/17/2007 |
| 7181967 | Enhancement of sensors for airborne operation Gravity gradiometers (or gravity gradient instrument, GGI) measure one or more components of the gradient of gravity which is expressed as the gradient of a gravity vector. One or more feedback loops extend from the instrument output to one or more of the accelerome... | 02/27/2007 |
| 7177743 | Vehicle control system having an adaptive controller The vehicle control system having an adaptive controller is provided that accomplishes unsupervised learning such that no prior extensive training is needed for every situation. The inventive controller system is based on a neural network evolved with genetic algori... | 02/13/2007 |
| 7113868 | Method and system for processing geophysical survey data A method and system for processing geophysical survey data is provided. Gravity gradiometry data is processed by approximating density values of terrain signals to remove contributions of the terrain from the gravity gradiometry data. Initially, a predicted gravity ... | 09/26/2006 |
| 7069990 | Enhanced oil recovery methods A process for enhanced oil recovery from an extraction operation comprises the steps of selection of an appropriate hydrocarbon bearing stratum; providing at least one production well and one injection well; and injecting into the target stratum a slurry formed from... | 07/04/2006 |
| 7055601 | Method and system for estimating the position of a movable device in a borehole A method is provided for estimating the position of a movable device in a borehole. The method comprises the steps of: (a) providing a prior location probability distribution associated with a first position of the device in the bo... | 06/06/2006 |
| 7043366 | Method for enhancing depth and spatial resolution of one and two dimensional residual surfaces derived from scalar potential data An improved method is disclosed for collecting or assembling scalar potential data measurements that are to be subsequently prepared as a surface representation for analysis via frequency domain transform filters. Measurements are made over a geographic reference re... | 05/09/2006 |
| 7032661 | Method and apparatus for combined NMR and formation testing for assessing relative permeability with formation testing and nuclear magnetic resonance testing Formation testing, resistivity and NMR measurements are used concurrently to determine a relative permeability representative of a formation surrounding the borehole. A method and apparatus is provided for accurate determination of the relative permeability for a fo... | 04/25/2006 |
| 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 |
| 7006959 | Method and system for simulating a hydrocarbon-bearing formation The invention is a method for simulating one or more characteristics of a multi-component, hydrocarbon-bearing formation into which a displacement fluid having at least one component is injected to displace formation hydrocarbons. The first step of the method is to ... | 02/28/2006 |
| 6954698 | System and method for surveying underground density distributions A method for geographical surveying includes the steps of determining an observation grid comprising observation points above a solution volume in the ground; making gravitational measurements at the observation points over a survey area; compiling a matrix having e... | 10/11/2005 |
| 6942037 | Process for mitigation of wellbore contaminants A method is disclosed for intermittently mitigating hazardous sulfur compounds, such as hydrogen sulfide, mercaptans and sulfur oxides, from a fluid in the head space of a wellbore. The method comprises contacting the fluid with a foamed aqueous stream comprising an... | 09/13/2005 |
| 6904366 | Waterflood control system for maximizing total oil recovery A control system and method for determining optimal fluid injection pressure is based upon a model of a growing hydrofracture due to waterflood injection pressure. This model is used to develop a control system optimizing the injection pressure by using a prescribed... | 06/07/2005 |
| 6886632 | Estimating formation properties in inter-well regions by monitoring saturation and salinity front arrivals A method and system of monitoring the movement of at least one front in an inter-well region is comprised of: providing a first well representing the origination of at least one front (such as a saturation front or a salinity front); providing one or more monitoring... | 05/03/2005 |
| 6467543 | System and process for secondary hydrocarbon recovery A hydrocarbon reservoir undergoing secondary recovery is subject to a first and then at least a second gravity gradient survey in which a gravity gradiometer takes gradient measurements on the surface above the reservoir to define successive data sets. Th... | 10/22/2002 |
| 6152226 | System and process for secondary hydrocarbon recovery A hydrocarbon reservoir undergoing secondary recovery is subject to a first and then at least a second gravity gradient survey in which a gravity gradiometer takes gradient measurements on the surface above the reservoir to define successive data sets. Th... | 11/28/2000 |
| 4501325 | Method for predicting workovers and shut-ins from analyzing the annulus effluent of a well The disclosed invention is a method for analyzing the annulus effluent of a producing well in a steam flood and using the information derived therefrom to determine whether to workover the production well for greater production, whether to allow the well ... | 02/26/1985 |
| 4488598 | Steam, noncondensable gas and foam for steam and distillation drive _in subsurface petroleum production A method is disclosed for increased recovery of crude petroleum from a subsurface formation containing petroleum deposits. The method combines steam and gas distillation drive using foam to divert the steam/gas and to establish a thermal barrier against h... | 12/18/1984 |
| 4399359 | Method for monitoring flood front movement during water flooding of subsurface formations A method is disclosed for monitoring the flood front movement during enhanced recovery operations wherein flooding fluids are pumped into a number of injection wells forcing residual oil movement toward a production well. A plurality of monitoring wells l... | 08/16/1983 |
| 4374544 | Technique for control of injection wells An injection well control method and apparatus controls fluid injection rates during secondary or tertiary petroleum recovery operations by monitoring bottomhole pressure adjacent an underground formation receiving the injected fluids while simultaneously... | 02/22/1983 |
| 4368781 | Method of recovering viscous petroleum employing heated subsurface perforated casing containing a movable diverter A method is disclosed for recovering viscous petroleum from subsurface formation, such as tar sands, wherein a substantially horizontal, perforated casing is positioned in the formation and a movable diverter is positioned to direct a hot drive fluid out ... | 01/18/1983 |
| 4143714 | Method for monitoring underground fluid movement for improving recovery of oil or bitumen A method for measuring fluid advance in underground formations comprises, (1) driving bench marks into the ground over the formation spaced a predetermined distance apart, (2) measuring and recording the precise vertical displacement of each bench mark at... | 03/13/1979 |
| 4085798 | Method for investigating the front profile during flooding of formations A method of determining the flood front profile created during the production flooding of an oil-bearing formation utilizes cased observation boreholes located between the injection wells and the producing wells. The time and depth of arrival of the flood... | 04/25/1978 |
