US Patent No: 5,498,960

Number of patents in Portfolio can not be more than 2000

NMR logging of natural gas in reservoirs

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Abstract

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A lithology-independent method of well logging the gas saturation in a reservoir containing natural gas. The method makes use of a pulsed NMR logging tool utilizing a recovery time that is greater than the relaxation time of hydrocarbon gas within the formation. In a preferred embodiment, two different NMR logs are obtained: one with a recovery time significantly shorter than the longitudinal relaxation time, T1, of the gas and one with a recovery time equal to or longer than T1. The amplitudes of the two logs are subtracted and the remainder divided by the hydrogen index of the gas at reservoir conditions to determine the pore volume occupied by gas.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SHELL OIL COMPANYHOUSTON, TX5174

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akkurt, Ridvan Kingwood, TX 24 981
Tutunjian, Pierre N Houston, TX 8 1145
Vinegar, Harold J Bellaire, TX 548 55415

Cited Art Landscape

Patent Info (Count) # Cites Year
 
PARAMAGNETIC ,45 BUCKEYE ROAD,PORTOLA VALLEY,CALIFORNIA 94025 (1)
4,528,508 Nuclear magnetic resonance method and apparatus for remote detection and volumetric measurement of petroleum reserves 50 1982
 
SCHLUMBERGER TECHNOLOGY CORPORATION (1)
5,389,877 Nuclear magnetic resonance pulse sequences for determining bound fluid volume 29 1991
 
SOUTHWEST RESEARCH INSTITUTE (1)
5,122,746 Hydrocarbon gas measurements using nuclear magnetic resonance 32 1990

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
SHELL OIL COMPANY (260)
6,094,048 NMR logging of natural gas reservoirs 270 1997
7,096,941 In situ thermal processing of a coal formation with heat sources located at an edge of a coal layer 143 2001
7,096,953 In situ thermal processing of a coal formation using a movable heating element 170 2001
7,086,468 In situ thermal processing of a hydrocarbon containing formation using heat sources positioned within open wellbores 150 2001
7,036,583 In situ thermal processing of a hydrocarbon containing formation to increase a porosity of the formation 167 2001
7,017,661 Production of synthesis gas from a coal formation 2 2001
6,997,255 In situ thermal processing of a hydrocarbon containing formation in a reducing environment 148 2001
6,994,160 In situ thermal processing of a hydrocarbon containing formation to produce hydrocarbons having a selected carbon number range 168 2001
6,994,161 In situ thermal processing of a coal formation with a selected moisture content 5 2001
6,994,168 In situ thermal processing of a hydrocarbon containing formation with a selected hydrogen to carbon ratio 147 2001
6,991,031 In situ thermal processing of a coal formation to convert a selected total organic carbon content into hydrocarbon products 3 2001
6,973,967 Situ thermal processing of a coal formation using pressure and/or temperature control 149 2001
6,966,372 In situ thermal processing of a hydrocarbon containing formation to produce oxygen containing formation fluids 155 2001
6,959,761 In situ thermal processing of a coal formation with a selected ratio of heat sources to production wells 150 2001
6,953,087 Thermal processing of a hydrocarbon containing formation to increase a permeability of the formation 172 2001
6,948,563 In situ thermal processing of a hydrocarbon containing formation with a selected hydrogen content 153 2001
6,913,078 In Situ thermal processing of hydrocarbons within a relatively impermeable formation 168 2001
6,910,536 In situ thermal processing of a hydrocarbon containing formation using a natural distributed combustor 153 2001
6,902,003 In situ thermal processing of a hydrocarbon containing formation having a selected total organic carbon content 151 2001
6,902,004 In situ thermal processing of a hydrocarbon containing formation using a movable heating element 157 2001
6,896,053 In situ thermal processing of a hydrocarbon containing formation using repeating triangular patterns of heat sources 175 2001
6,889,769 In situ thermal processing of a hydrocarbon containing formation with a selected moisture content 153 2001
6,880,635 In situ production of synthesis gas from a coal formation, the synthesis gas having a selected H2 to CO ratio 166 2001
6,877,554 In situ thermal processing of a hydrocarbon containing formation using pressure and/or temperature control 164 2001
6,871,707 In situ thermal processing of a hydrocarbon containing formation with carbon dioxide sequestration 166 2001
6,866,097 In situ thermal processing of a coal formation to increase a permeability/porosity of the formation 172 2001
6,820,688 In situ thermal processing of coal formation with a selected hydrogen content and/or selected H/C ratio 188 2001
6,805,195 In situ thermal processing of a hydrocarbon containing formation to produce hydrocarbon fluids and synthesis gas 199 2001
6,789,625 In situ thermal processing of a hydrocarbon containing formation using exposed metal heat sources 210 2001
6,769,483 In situ thermal processing of a hydrocarbon containing formation using conductor in conduit heat sources 213 2001
6,769,485 In situ production of synthesis gas from a coal formation through a heat source wellbore 209 2001
6,763,886 In situ thermal processing of a coal formation with carbon dioxide sequestration 201 2001
6,761,216 In situ thermal processing of a coal formation to produce hydrocarbon fluids and synthesis gas 207 2001
6,758,268 In situ thermal processing of a hydrocarbon containing formation using a relatively slow heating rate 211 2001
6,752,210 In situ thermal processing of a coal formation using heat sources positioned within open wellbores 223 2001
6,749,021 In situ thermal processing of a coal formation using a controlled heating rate 209 2001
6,745,831 In situ thermal processing of a hydrocarbon containing formation by controlling a pressure of the formation 230 2001
6,745,832 Situ thermal processing of a hydrocarbon containing formation to control product composition 192 2001
6,745,837 In situ thermal processing of a hydrocarbon containing formation using a controlled heating rate 212 2001
6,742,587 In situ thermal processing of a coal formation to form a substantially uniform, relatively high permeable formation 206 2001
6,742,588 In situ thermal processing of a hydrocarbon containing formation to produce formation fluids having a relatively low olefin content 237 2001
6,742,589 In situ thermal processing of a coal formation using repeating triangular patterns of heat sources 205 2001
6,742,593 In situ thermal processing of a hydrocarbon containing formation using heat transfer from a heat transfer fluid to heat the formation 212 2001
6,739,393 In situ thermal processing of a coal formation and tuning production 206 2001
6,739,394 Production of synthesis gas from a hydrocarbon containing formation 214 2001
6,736,215 In situ thermal processing of a hydrocarbon containing formation, in situ production of synthesis gas, and carbon dioxide sequestration 217 2001
6,732,794 In situ thermal processing of a hydrocarbon containing formation to produce a mixture with a selected hydrogen content 211 2001
6,732,795 In situ thermal processing of a hydrocarbon containing formation to pyrolyze a selected percentage of hydrocarbon material 171 2001
6,732,796 In situ production of synthesis gas from a hydrocarbon containing formation, the synthesis gas having a selected H2 to CO ratio 231 2001
6,729,395 In situ thermal processing of a hydrocarbon containing formation with a selected ratio of heat sources to production wells 213 2001
6,729,396 In situ thermal processing of a coal formation to produce hydrocarbons having a selected carbon number range 205 2001
6,729,397 In situ thermal processing of a hydrocarbon containing formation with a selected vitrinite reflectance 211 2001
6,729,401 In situ thermal processing of a hydrocarbon containing formation and ammonia production 211 2001
6,725,920 In situ thermal processing of a hydrocarbon containing formation to convert a selected amount of total organic carbon into hydrocarbon products 212 2001
6,725,921 In situ thermal processing of a coal formation by controlling a pressure of the formation 157 2001
6,725,928 In situ thermal processing of a coal formation using a distributed combustor 207 2001
6,722,429 In situ thermal processing of a hydrocarbon containing formation leaving one or more selected unprocessed areas 228 2001
6,722,430 In situ thermal processing of a coal formation with a selected oxygen content and/or selected O/C ratio 207 2001
6,722,431 In situ thermal processing of hydrocarbons within a relatively permeable formation 227 2001
6,719,047 In situ thermal processing of a hydrocarbon containing formation in a hydrogen-rich environment 212 2001
6,715,546 In situ production of synthesis gas from a hydrocarbon containing formation through a heat source wellbore 230 2001
6,715,547 In situ thermal processing of a hydrocarbon containing formation to form a substantially uniform, high permeability formation 211 2001
6,715,548 In situ thermal processing of a hydrocarbon containing formation to produce nitrogen containing formation fluids 211 2001
6,715,549 In situ thermal processing of a hydrocarbon containing formation with a selected atomic oxygen to carbon ratio 173 2001
6,712,135 In situ thermal processing of a coal formation in reducing environment 207 2001
6,712,136 In situ thermal processing of a hydrocarbon containing formation using a selected production well spacing 256 2001
6,712,137 In situ thermal processing of a coal formation to pyrolyze a selected percentage of hydrocarbon material 206 2001
6,708,758 In situ thermal processing of a coal formation leaving one or more selected unprocessed areas 216 2001
6,702,016 In situ thermal processing of a hydrocarbon containing formation with heat sources located at an edge of a formation layer 217 2001
6,698,515 In situ thermal processing of a coal formation using a relatively slow heating rate 208 2001
6,688,387 In situ thermal processing of a hydrocarbon containing formation to produce a hydrocarbon condensate 229 2001
6,609,570 In situ thermal processing of a coal formation and ammonia production 208 2001
6,607,033 In Situ thermal processing of a coal formation to produce a condensate 208 2001
6,591,906 In situ thermal processing of a hydrocarbon containing formation with a selected oxygen content 237 2001
6,591,907 In situ thermal processing of a coal formation with a selected vitrinite reflectance 212 2001
6,588,504 In situ thermal processing of a coal formation to produce nitrogen and/or sulfur containing formation fluids 220 2001
6,581,684 In Situ thermal processing of a hydrocarbon containing formation to produce sulfur containing formation fluids 253 2001
7,096,942 In situ thermal processing of a relatively permeable formation while controlling pressure 178 2002
7,055,600 In situ thermal recovery from a relatively permeable formation with controlled production rate 175 2002
7,051,807 In situ thermal recovery from a relatively permeable formation with quality control 113 2002
7,051,811 In situ thermal processing through an open wellbore in an oil shale formation 43 2002
7,040,398 In situ thermal processing of a relatively permeable formation in a reducing environment 151 2002
7,040,399 In situ thermal processing of an oil shale formation using a controlled heating rate 166 2002
7,040,400 In situ thermal processing of a relatively impermeable formation using an open wellbore 177 2002
7,032,660 In situ thermal processing and inhibiting migration of fluids into or out of an in situ oil shale formation 181 2002
7,013,972 In situ thermal processing of an oil shale formation using a natural distributed combustor 28 2002
7,004,247 Conductor-in-conduit heat sources for in situ thermal processing of an oil shale formation 188 2002
7,004,251 In situ thermal processing and remediation of an oil shale formation 189 2002
6,997,518 In situ thermal processing and solution mining of an oil shale formation 176 2002
6,994,169 In situ thermal processing of an oil shale formation with a selected property 157 2002
6,991,032 In situ thermal processing of an oil shale formation using a pattern of heat sources 168 2002
6,991,033 In situ thermal processing while controlling pressure in an oil shale formation 88 2002
6,991,036 Thermal processing of a relatively permeable formation 69 2002
6,981,548 In situ thermal recovery from a relatively permeable formation 156 2002
6,966,374 In situ thermal recovery from a relatively permeable formation using gas to increase mobility 159 2002
6,964,300 In situ thermal recovery from a relatively permeable formation with backproduction through a heater wellbore 185 2002
6,951,247 In situ thermal processing of an oil shale formation using horizontal heat sources 191 2002
6,948,562 Production of a blending agent using an in situ thermal process in a relatively permeable formation 186 2002
6,929,067 Heat sources with conductive material for in situ thermal processing of an oil shale formation 171 2002
6,923,257 In situ thermal processing of an oil shale formation to produce a condensate 174 2002
6,918,442 In situ thermal processing of an oil shale formation in a reducing environment 156 2002
6,918,443 In situ thermal processing of an oil shale formation to produce hydrocarbons having a selected carbon number range 170 2002
6,915,850 In situ thermal processing of an oil shale formation having permeable and impermeable sections 158 2002
6,880,633 In situ thermal processing of an oil shale formation to produce a desired product 203 2002
6,877,555 In situ thermal processing of an oil shale formation while inhibiting coking 187 2002
7,165,615 In situ recovery from a hydrocarbon containing formation using conductor-in-conduit heat sources with an electrically conductive material in the overburden 178 2002
7,156,176 Installation and use of removable heaters in a hydrocarbon containing formation 157 2002
7,128,153 Treatment of a hydrocarbon containing formation after heating 162 2002
7,114,566 In situ thermal processing of a hydrocarbon containing formation using a natural distributed combustor 186 2002
7,104,319 In situ thermal processing of a heavy oil diatomite formation 178 2002
7,100,994 Producing hydrocarbons and non-hydrocarbon containing materials when treating a hydrocarbon containing formation 176 2002
7,090,013 In situ thermal processing of a hydrocarbon containing formation to produce heated fluids 179 2002
7,086,465 In situ production of a blending agent from a hydrocarbon containing formation 157 2002
7,077,198 In situ recovery from a hydrocarbon containing formation using barriers 198 2002
7,077,199 In situ thermal processing of an oil reservoir formation 185 2002
7,066,254 In situ thermal processing of a tar sands formation 211 2002
7,066,257 In situ recovery from lean and rich zones in a hydrocarbon containing formation 158 2002
7,063,145 Methods and systems for heating a hydrocarbon containing formation in situ with an opening contacting the earth's surface at two locations 179 2002
7,051,808 Seismic monitoring of in situ conversion in a hydrocarbon containing formation 94 2002
7,011,154 In situ recovery from a kerogen and liquid hydrocarbon containing formation 187 2002
6,991,045 Forming openings in a hydrocarbon containing formation using magnetic tracking 158 2002
6,969,123 Upgrading and mining of coal 190 2002
6,932,155 In situ thermal processing of a hydrocarbon containing formation via backproducing through a heater well 195 2002
6,856,132 Method and apparatus for subterranean formation flow imaging 34 2002
6,923,258 In situ thermal processsing of a hydrocarbon containing formation to produce a mixture with a selected hydrogen content 169 2003
8,238,730 High voltage temperature limited heaters 19 2003
8,224,164 Insulated conductor temperature limited heaters 19 2003
8,224,163 Variable frequency temperature limited heaters 0 2003
7,219,734 Inhibiting wellbore deformation during in situ thermal processing of a hydrocarbon containing formation 170 2003
7,121,341 Conductor-in-conduit temperature limited heaters 154 2003
7,073,578 Staged and/or patterned heating during in situ thermal processing of a hydrocarbon containing formation 195 2003
7,121,342 Thermal processes for subsurface formations 220 2004
8,355,623 Temperature limited heaters with high power factors 14 2005
7,510,000 Reducing viscosity of oil for production from a hydrocarbon containing formation 108 2005
7,490,665 Variable frequency temperature limited heaters 110 2005
7,481,274 Temperature limited heaters with relatively constant current 105 2005
7,431,076 Temperature limited heaters using modulated DC power 116 2005
7,424,915 Vacuum pumping of conductor-in-conduit heaters 116 2005
7,383,877 Temperature limited heaters with thermally conductive fluid used to heat subsurface formations 110 2005
7,370,704 Triaxial temperature limited heater 116 2005
7,357,180 Inhibiting effects of sloughing in wellbores 123 2005
7,353,872 Start-up of temperature limited heaters using direct current (DC) 109 2005
7,320,364 Inhibiting reflux in a heated well of an in situ conversion system 104 2005
7,225,866 In situ thermal processing of an oil shale formation using a pattern of heat sources 168 2006
8,224,165 Temperature limited heater utilizing non-ferromagnetic conductor 20 2006
8,070,840 Treatment of gas from an in situ conversion process 35 2006
8,027,571 In situ conversion process systems utilizing wellbores in at least two regions of a formation 47 2006
7,986,869 Varying properties along lengths of temperature limited heaters 51 2006
7,942,197 Methods and systems for producing fluid from an in situ conversion process 53 2006
7,860,377 Subsurface connection methods for subsurface heaters 80 2006
7,831,134 Grouped exposed metal heaters 68 2006
7,575,052 In situ conversion process utilizing a closed loop heating system 105 2006
7,575,053 Low temperature monitoring system for subsurface barriers 104 2006
7,546,873 Low temperature barriers for use with in situ processes 80 2006
7,527,094 Double barrier system for an in situ conversion process 117 2006
7,500,528 Low temperature barrier wellbores formed using water flushing 115 2006
7,435,037 Low temperature barriers with heat interceptor wells for in situ processes 126 2006
7,360,588 Thermal processes for subsurface formations 109 2006
8,606,091 Subsurface heaters with low sulfidation rates 0 2006
7,635,025 Cogeneration systems and processes for treating hydrocarbon containing formations 100 2006
7,591,310 Methods of hydrotreating a liquid stream to remove clogging compounds 111 2006
7,584,789 Methods of cracking a crude product to produce additional crude products 111 2006
7,581,589 Methods of producing alkylated hydrocarbons from an in situ heat treatment process liquid 115 2006
7,562,706 Systems and methods for producing hydrocarbons from tar sands formations 117 2006
7,559,367 Temperature limited heater with a conduit substantially electrically isolated from the formation 118 2006
7,559,368 Solution mining systems and methods for treating hydrocarbon containing formations 118 2006
7,556,095 Solution mining dawsonite from hydrocarbon containing formations with a chelating agent 135 2006
7,556,096 Varying heating in dawsonite zones in hydrocarbon containing formations 123 2006
7,549,470 Solution mining and heating by oxidation for treating hydrocarbon containing formations 136 2006
7,461,691 In situ recovery from a hydrocarbon containing formation 147 2007
8,083,813 Methods of producing transportation fuel 33 2007
7,912,358 Alternate energy source usage for in situ heat treatment processes 54 2007
7,866,385 Power systems utilizing the heat of produced formation fluid 69 2007
7,793,722 Non-ferromagnetic overburden casing 66 2007
7,785,427 High strength alloys 68 2007
7,683,296 Adjusting alloy compositions for selected properties in temperature limited heaters 84 2007
7,673,786 Welding shield for coupling heaters 85 2007
7,635,023 Time sequenced heating of multiple layers in a hydrocarbon containing formation 112 2007
7,631,689 Sulfur barrier for use with in situ processes for treating formations 104 2007
7,610,962 Sour gas injection for use with in situ heat treatment 92 2007
7,604,052 Compositions produced using an in situ heat treatment process 113 2007
7,533,719 Wellhead with non-ferromagnetic materials 120 2007
7,798,221 In situ recovery from a hydrocarbon containing formation 82 2007
7,735,935 In situ thermal processing of an oil shale formation containing carbonate minerals 82 2007
7,845,411 In situ heat treatment process utilizing a closed loop heating system 69 2007
7,841,401 Gas injection to inhibit migration during an in situ heat treatment process 67 2007
7,730,946 Treating tar sands formations with dolomite 75 2007
7,730,945 Using geothermal energy to heat a portion of a formation for an in situ heat treatment process 76 2007
7,730,947 Creating fluid injectivity in tar sands formations 76 2007
7,717,171 Moving hydrocarbons through portions of tar sands formations with a fluid 78 2007
7,703,513 Wax barrier for use with in situ processes for treating formations 88 2007
7,681,647 Method of producing drive fluid in situ in tar sands formations 85 2007
7,677,310 Creating and maintaining a gas cap in tar sands formations 71 2007
7,677,314 Method of condensing vaporized water in situ to treat tar sands formations 70 2007
7,673,681 Treating tar sands formations with karsted zones 73 2007
7,644,765 Heating tar sands formations while controlling pressure 83 2007
7,635,024 Heating tar sands formations to visbreaking temperatures 101 2007
7,631,690 Heating hydrocarbon containing formations in a spiral startup staged sequence 105 2007
7,562,707 Heating hydrocarbon containing formations in a line drive staged process 119 2007
7,540,324 Heating hydrocarbon containing formations in a checkerboard pattern staged process 121 2007
7,640,980 Thermal processes for subsurface formations 83 2008
8,791,396 Floating insulated conductors for heating subsurface formations 0 2008
8,662,175 Varying properties of in situ heat treatment of a tar sands formation based on assessed viscosities 1 2008
8,459,359 Treating nahcolite containing formations and saline zones 11 2008
8,381,815 Production from multiple zones of a tar sands formation 14 2008
8,327,681 Wellbore manufacturing processes for in situ heat treatment processes 5 2008
8,042,610 Parallel heater system for subsurface formations 47 2008
7,950,453 Downhole burner systems and methods for heating subsurface formations 61 2008
7,931,086 Heating systems for heating subsurface formations 65 2008
7,849,922 In situ recovery from residually heated sections in a hydrocarbon containing formation 71 2008
7,841,408 In situ heat treatment from multiple layers of a tar sands formation 70 2008
7,841,425 Drilling subsurface wellbores with cutting structures 70 2008
7,832,484 Molten salt as a heat transfer fluid for heating a subsurface formation 69 2008
7,798,220 In situ heat treatment of a tar sands formation after drive process treatment 67 2008
8,536,497 Methods for forming long subsurface heaters 0 2008
8,276,661 Heating subsurface formations by oxidizing fuel on a fuel carrier 20 2008
8,272,455 Methods for forming wellbores in heated formations 7 2008
8,240,774 Solution mining and in situ treatment of nahcolite beds 22 2008
8,196,658 Irregular spacing of heat sources for treating hydrocarbon containing formations 29 2008
8,162,059 Induction heaters used to heat subsurface formations 32 2008
8,146,661 Cryogenic treatment of gas 34 2008
8,146,669 Multi-step heater deployment in a subsurface formation 31 2008
8,113,272 Three-phase heaters with common overburden sections for heating subsurface formations 13 2008
8,011,451 Ranging methods for developing wellbores in subsurface formations 38 2008
7,866,386 In situ oxidation of subsurface formations 68 2008
7,866,388 High temperature methods for forming oxidizer fuel 65 2008
8,627,887 In situ recovery from a hydrocarbon containing formation 1 2008
8,752,904 Heated fluid flow in mines and tunnels used in heating subsurface hydrocarbon containing formations 0 2009
8,177,305 Heater connections in mines and tunnels for use in treating subsurface hydrocarbon containing formations 32 2009
8,172,335 Electrical current flow between tunnels for use in heating subsurface hydrocarbon containing formations 27 2009
8,162,405 Using tunnels for treating subsurface hydrocarbon containing formations 29 2009
8,151,907 Dual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations 32 2009
8,353,347 Deployment of insulated conductors for treating subsurface formations 5 2009
8,281,861 Circulated heated transfer fluid heating of subsurface hydrocarbon formations 20 2009
8,267,170 Offset barrier wells in subsurface formations 15 2009
8,267,185 Circulated heated transfer fluid systems used to treat a subsurface formation 18 2009
8,261,832 Heating subsurface formations with fluids 24 2009
8,256,512 Movable heaters for treating subsurface hydrocarbon containing formations 11 2009
8,220,539 Controlling hydrogen pressure in self-regulating nuclear reactors used to treat a subsurface formation 29 2009
8,636,323 Mines and tunnels for use in treating subsurface hydrocarbon containing formations 0 2009
8,562,078 Hydrocarbon production from mines and tunnels used in treating subsurface hydrocarbon containing formations 3 2009
7,942,203 Thermal processes for subsurface formations 63 2010
8,448,707 Non-conducting heater casings 0 2010
8,434,555 Irregular pattern treatment of a subsurface formation 12 2010
8,327,932 Recovering energy from a subsurface formation 13 2010
8,192,682 High strength alloys 22 2010
8,225,866 In situ recovery from a hydrocarbon containing formation 19 2010
8,233,782 Grouped exposed metal heaters 11 2010
8,151,880 Methods of making transportation fuel 30 2010
8,833,453 Electrodes for electrical current flow heating of subsurface formations with tapered copper thickness 0 2011
8,820,406 Electrodes for electrical current flow heating of subsurface formations with conductive material in wellbore 0 2011
8,739,874 Methods for heating with slots in hydrocarbon formations 0 2011
8,701,768 Methods for treating hydrocarbon formations 0 2011
8,701,769 Methods for treating hydrocarbon formations based on geology 0 2011
8,631,866 Leak detection in circulated fluid systems for heating subsurface formations 0 2011
8,230,927 Methods and systems for producing fluid from an in situ conversion process 12 2011
8,579,031 Thermal processes for subsurface formations 0 2011
8,555,971 Treating tar sands formations with dolomite 2 2012
8,485,252 In situ recovery from a hydrocarbon containing formation 11 2012
8,789,586 In situ recovery from a hydrocarbon containing formation 0 2013
 
HALLIBURTON ENERGY SERVICES, INC. (33)
5,696,448 NMR system and method for formation evaluation using diffusion and relaxation log measurements 40 1995
5,936,405 System and method for lithology-independent gas detection using multifrequency gradient NMR logging 59 1996
6,005,389 Pulse sequences and interpretation techniques for NMR measurements 47 1997
6,242,912 System and method for lithology-independent gas detection using multifrequency gradient NMR logging 26 1997
6,204,663 Pulse sequence and method for suppression of magneto-acoustic artifacts in NMR data 21 1997
6,072,314 NMR interpretation technique using error minimization with variable T2 cutoff 2 1997
6,111,408 Nuclear magnetic resonance sensing apparatus and techniques for downhole measurements 52 1997
6,051,973 Method for formation evaluation while drilling 33 1997
6,023,164 Eccentric NMR well logging apparatus and method 23 1998
6,107,796 Method and apparatus for differentiating oil based mud filtrate from connate oil 30 1998
6,268,726 Method and apparatus for nuclear magnetic resonance measuring while drilling 51 1999
6,316,940 System and method for identification of hydrocarbons using enhanced diffusion 7 1999
6,377,042 Method and apparatus for merging of NMR echo trains in the time domain 11 1999
6,255,819 System and method for geologically-enhanced magnetic resonance imaging logs 26 1999
6,366,087 NMR logging apparatus and methods for fluid typing 18 1999
6,242,913 Method for formation evaluation while drilling 11 2000
6,661,226 NMR apparatus and methods for measuring volumes of hydrocarbon gas and oil 12 2000
6,541,969 Method and apparatus for improving the vertical resolution of NMR logs 25 2000
7,135,862 NMR logging using time-domain averaging 3 2001
6,646,437 System and method for clay typing using NMR-based porosity modeling 18 2001
6,531,868 System and methods for formation evaluation while drilling 20 2001
6,512,371 System and method for determining oil, water and gas saturations for low-field gradient NMR logging tools 30 2001
6,525,534 System and methods for NMR signal processing without phase alternated pair stacking 14 2001
6,362,619 Method and apparatus for nuclear magnetic resonance measuring while drilling 30 2001
6,583,621 Method and apparatus for nuclear magnetic resonance measuring while drilling 23 2002
6,825,658 NMR logging apparatus and methods for fluid typing 4 2002
6,956,371 Method and apparatus for detecting diffusion sensitive phases with estimation of residual error in NMR logs 14 2003
6,975,112 Systems and methods of determining motion tool parameters in borehole logging 8 2003
6,825,659 Method and apparatus for nuclear magnetic resonance measuring while drilling 12 2003
7,463,027 Systems and methods for deep-looking NMR logging 11 2004
7,501,818 System and methods for T1-based logging 1 2007
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7,755,354 System and methods for T1-based logging 1 2008
 
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6,686,738 Method for determining decay characteristics of multi-component downhole decay data 4 2002
7,298,142 Method and apparatus for reservoir fluid characterization in nuclear magnetic resonance logging 6 2005
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7,705,592 Two dimensional T1/T2APP-T2APP processing of multi-gradient NMR data 0 2008
7,808,238 Echo-decay-acceleration data acquisition method for gas identification using a low-field gradient 2 2008
8,131,469 Data acquisition and processing for invasion profile and gas zone analysis with NMR dual or multiple interecho spacing time logs 0 2008
8,248,067 Apparatus and methods for estimating downhole fluid compositions 0 2009
8,185,315 Determination of irreducible water cut-off using two dimensional nuclear magnetic resonance data 0 2011
 
SCHLUMBERGER TECHNOLOGY CORPORATION (4)
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5,796,252 Nuclear magnetic resonance borehole logging apparatus and method for ascertaining a volume of hydrocarbons independent of a diffusion coefficient 85 1997
6,147,489 Method and apparatus for measuring total nuclear magnetic resonance porosity 9 1997
7,075,297 Combining NMR, density, and dielectric measurements for determining downhole reservoir fluid volumes 4 2002
 
CASE WESTERN RESERVE UNIVERSITY (3)
6,995,560 Chemical species suppression for MRI imaging using spiral trajectories with off-resonance correction 12 2004
7,042,215 Three point dixon techniques in MRI spiral trajectories with off-resonance correction where each TE is a multiple of 2.2 milliseconds 15 2004
7,545,966 Efficient methods for reconstruction and deblurring of magnetic resonance images 9 2004
 
Wollin Ventures, Inc. (3)
6,166,540 Method of resistivity well logging utilizing nuclear magnetic resonance 12 1997
6,342,784 Method for resistivity well logging utilizing nuclear magnetic resonance 6 2000
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COMPANY, SHELL OIL (1)
8,191,630 Creating fluid injectivity in tar sands formations 30 2010
 
ENERGY, UNITED STATES DEPARTMENT OF (1)
7,597,147 Temperature limited heaters using phase transformation of ferromagnetic material 109 2007
 
GAS SENSING TECHNOLOGY CORP. (1)
RE44728 In-situ detection and analysis of methane in coal bed methane formations with spectrometers 0 2006
 
LANDMARK GRAPHICS CORPORATION (1)
8,507,868 Systems and methods for determining fluid mobility in rock samples 0 2011
 
LAWRENCE LIVERMORE NATIONAL SECURITY, LLC (1)
6,177,794 Use of earth field spin echo NMR to search for liquid minerals 2 1998
 
REEVES WIRELINE TECHNOLOGIES LIMITED (1)
6,909,969 Method of through-casing gas detection 2 2003
 
UNIVERSITY TECHNOLOGIES INTERNATIONAL INC. (1)
6,630,357 Quantification of bitumen using NMR 7 2001
 
WESTERN ATLAS INTERNATIONAL, INC. (1)
6,084,408 Methods for acquisition and processing of nuclear magnetic resonance signals for determining fluid properties in petroleum reservoirs having more than one fluid phase 12 1998
 
Other [Check patent profile for assignment information] (1)
6,445,187 System for the measurement of electrical characteristics of geological formations from within steel cased wells using magnetic circuits 8 2000