CO4130234A1 - PERMEABILITY DETERMINATION FROM RELAXATION MEASUREMENTS IN NMR FOR FLUIDS IN POROUS MEDIA - Google Patents
PERMEABILITY DETERMINATION FROM RELAXATION MEASUREMENTS IN NMR FOR FLUIDS IN POROUS MEDIAInfo
- Publication number
- CO4130234A1 CO4130234A1 CO94009569A CO94009569A CO4130234A1 CO 4130234 A1 CO4130234 A1 CO 4130234A1 CO 94009569 A CO94009569 A CO 94009569A CO 94009569 A CO94009569 A CO 94009569A CO 4130234 A1 CO4130234 A1 CO 4130234A1
- Authority
- CO
- Colombia
- Prior art keywords
- pulse
- nmr
- permeability
- prefactor
- porosity
- Prior art date
Links
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
REIVINDICACION NUMERO UN METODO PARA DETERMINAR LA PERMEABILIDAD DE UN MEDIO POROSO SATURADO CON UN LIQUIDO UTILIZANDO RESONANCIA MAGNETICA NUCLEAR (NMR) Y COMPRENDE: (a) APLICAR UN PULSO DE RADIOFRECUENCIA SECUENCIAL QUE DESPUES DE UN PULSO INICIAL GENERA SUCESIVOS ECOGIROS CON UN TREN DE PULSOS DE RADIOFRECUENCIA ESPACIADOS CON UN INTERVALO DE TIEMPO DE LONGITUD T EN EL CUAL LOS PULSOS TIENEN UNA FRECUENCIA POR- TADORA CORRESPONDIENTE A LA FRECUENCIA LARMOR DE LOS GIROS DE FLUIDO QUE LLENAN EL ESPACIO DE POROS DEL MEDIO PARA EL CUAL SE ESTA DETERMINANDO LA PERMEABILIDAD DE FLUJO FLUIDO; (b) MEDIR EL DECAIMIENTO DE LA MAGNETIZACION TRANSVERSAL EN CADA PUNTO MEDIO ESPACIADO SUCESI- VAMENTE EN FORMA REGULAR ENTRE LOS PULSO A 180 GRADOS EN DONDE LOS PUNTOS MEDIOS COINCIDEN CON EL PICO DE LOS ECOGIROS; (c) REPETIR LAS ETAPAS (a) y (b) AL MENOS UNO O MAS VECES CON LO CUAL CADA ETAPA REPETIDA DE (a) UTILIZA ELPULSO DE RADIOFRECUENCIA DEL TREN CON UN VALOR DIFERENTE DE PULSO DE ESPACIAMIENTO T; (d) DETERMINAR EL TIEMPO DE RELAJACION TRANSVERSAL T2(T), ENTRE EL DECAIMIENTO DE MAGNETIZACION TRANSVERSAL PARA CADA VALOR DE T Y DETERMINAR BIEN UN PREFACTOR (CALOR) O UNA LONGITUD DE DIFUSION RESTRINGIDA 1 (SUB)nmr DE DICHO T2(T); (e) MEDIR LA POROSIDAD DEL MEDIO POROSO; (f) DETERMINAR LA PERMEABILIDAD DEL MEDIO A PARTIR DE LA POROSIDAD Y YA SEA DE UN PREFACTOR (CALOR) O UNA LONGITUD DE DIFUSION RSTRINGIDA 1 (SUB)nmr A PARTIR DE T2( )".CLAIMED NUMBER A METHOD TO DETERMINE THE PERMEABILITY OF A POROUS MEDIUM SATURATED WITH A LIQUID USING NUCLEAR MAGNETIC RESONANCE (NMR) AND UNDERSTANDS: (a) APPLYING A SEQUENTIAL RADIOFREQUENCY PULSE OF SESS AFTER A PULSE RADIOFREQUENCY SPACED WITH A TIME INTERVAL OF LENGTH T IN WHICH THE PULSES HAVE A BEARING FREQUENCY CORRESPONDING TO THE LARMOR FREQUENCY OF THE FLUID TURNS THAT FILL THE PORE SPACE OF THE MEDIUM FOR WHICH THE PERMEABILITY OF PERMEABILITY IS DETERMINED ; (b) MEASURE THE DECREASE OF CROSS-CUTTING MAGNETIZATION AT EACH HALF-POINT SPACED REGULARLY BETWEEN THE PULSE AT 180 DEGREES WHERE THE MIDDLE POINTS COINCIDE WITH THE PEAK OF THE ECOGIROS; (c) REPEAT STAGES (a) and (b) AT LEAST ONE OR MORE TIMES WITH WHICH EACH REPEATED STAGE OF (a) USES THE RADIO FREQUENCY PULSE OF THE TRAIN WITH A DIFFERENT VALUE OF SPACING PULSE T; (d) DETERMINE THE TRANSVERSAL RELAXATION TIME T2 (T), BETWEEN THE DECREASE OF CROSS-CUTTING MAGNETIZATION FOR EACH VALUE OF T AND DETERMINE A PREFACTOR (HEAT) OR A RESTRICTED DIFFUSION LENGTH 1 (SUB) nmR OF SUCH T2 (T); (e) MEASURE THE POROSITY OF THE POROUS MEDIA; (f) DETERMINE MEDIA PERMEABILITY FROM POROSITY AND EITHER FROM A PREFACTOR (HEAT) OR A RESTRICTED DIFFUSION LENGTH 1 (SUB) nmr FROM T2 () ".
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CO94009569A CO4130234A1 (en) | 1994-03-10 | 1994-03-10 | PERMEABILITY DETERMINATION FROM RELAXATION MEASUREMENTS IN NMR FOR FLUIDS IN POROUS MEDIA |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CO94009569A CO4130234A1 (en) | 1994-03-10 | 1994-03-10 | PERMEABILITY DETERMINATION FROM RELAXATION MEASUREMENTS IN NMR FOR FLUIDS IN POROUS MEDIA |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CO4130234A1 true CO4130234A1 (en) | 1995-02-13 |
Family
ID=40908994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CO94009569A CO4130234A1 (en) | 1994-03-10 | 1994-03-10 | PERMEABILITY DETERMINATION FROM RELAXATION MEASUREMENTS IN NMR FOR FLUIDS IN POROUS MEDIA |
Country Status (1)
| Country | Link |
|---|---|
| CO (1) | CO4130234A1 (en) |
-
1994
- 1994-03-10 CO CO94009569A patent/CO4130234A1/en unknown
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