How to do Quick-Look Shaly Sand Log Analysis with Confidence - Petrophysics Training & Courses
The operations petrophysicist confronted with the daunting task of generating fit-for-purpose Quick-Look benefits from the freshwater, piled shaly areas of S.E. Asia will feel challenged. The approaches he/she adopts typically don't offer the essential information to differentiate hydrocarbon zones and permeability. As opposed to utilizing porosity/conductivity log evaluation -- a instrument unsuited to the job at hand -- that paper sets out easy, cross-disciplinary methods which cross-check and harden Quick-Look log investigation. Commonly available specific log, non-log and generic information are used to the end.
To begin with, a density-neutron complete porosity, mostly resistant to ordinary lithology and fluid consequences is calculated. In case NMR, rotary sidewalls or cancel core can be found these data are utilized to calibrate and supplement the fluid density enter. Instead PetroDB's* default driven fluid density equations are utilized.
Porosity is currently utilized to calculate a clear salinity curve from regular Archie, and also the maximum salinities utilized for Rw. This is comparable to some Pickett storyline Rw but might be substituted by certain neighborhood understanding of Rw.
If FWLs stay unsure the most promising zone is supposed to be over a FWL.
Together with salinity and FWLs mended the obvious standard Archie theres curve is calculated below FWLs. This m quantifies the existence of non-Archie (surplus ) conductivity. This m is currently called (mv) from traditional logs and utilized within this newspaper's Shaly Archie formulae. Mv can be utilized to calculate the constant Waxman Smits Qv and Double Water Model shaly sand inputs. When accessible, regular output NMR curves are all used to calculate these inputs, providing certain criteria are satisfied.
When accessible, regular output NMR is currently employed to get a resistivity independent Sw. Alternately, sidewall, cancel or generic PetroDB center information and graph K-4 supply Swi. If neither can be obtained PetroDB's generic vshale, porosity and tvdss supply permeability, Swi and complete Saturation Height works, in which Swp Swi. Under specific conditions dielectric curves might also supply Swi.
Having a resistivity separate Sw currently available the Quick-Look procedure calibrates the saturation exponents (n) for its 3 saturation equations.
Volume volume water subsequently computes Timur Coates Permeability, which permits reconciliation of the full procedure against any accessible heart permeability: sidewall, cancel or PetroDB.
This Petrophysics courses of action is coded to some log evaluation command file and performed within 3-4 hours. The diversity of inputs utilized affords a level of confidence just not feasible with traditional shaly sand log investigation. This process also checks and calibrates present molds and geo-models. Feel free to contact our expert Petrophysics Consultant for more information about Petrophysics.
To begin with, a density-neutron complete porosity, mostly resistant to ordinary lithology and fluid consequences is calculated. In case NMR, rotary sidewalls or cancel core can be found these data are utilized to calibrate and supplement the fluid density enter. Instead PetroDB's* default driven fluid density equations are utilized.
Porosity is currently utilized to calculate a clear salinity curve from regular Archie, and also the maximum salinities utilized for Rw. This is comparable to some Pickett storyline Rw but might be substituted by certain neighborhood understanding of Rw.
If FWLs stay unsure the most promising zone is supposed to be over a FWL.
Together with salinity and FWLs mended the obvious standard Archie theres curve is calculated below FWLs. This m quantifies the existence of non-Archie (surplus ) conductivity. This m is currently called (mv) from traditional logs and utilized within this newspaper's Shaly Archie formulae. Mv can be utilized to calculate the constant Waxman Smits Qv and Double Water Model shaly sand inputs. When accessible, regular output NMR curves are all used to calculate these inputs, providing certain criteria are satisfied.
When accessible, regular output NMR is currently employed to get a resistivity independent Sw. Alternately, sidewall, cancel or generic PetroDB center information and graph K-4 supply Swi. If neither can be obtained PetroDB's generic vshale, porosity and tvdss supply permeability, Swi and complete Saturation Height works, in which Swp Swi. Under specific conditions dielectric curves might also supply Swi.
Having a resistivity separate Sw currently available the Quick-Look procedure calibrates the saturation exponents (n) for its 3 saturation equations.
Volume volume water subsequently computes Timur Coates Permeability, which permits reconciliation of the full procedure against any accessible heart permeability: sidewall, cancel or PetroDB.
This Petrophysics courses of action is coded to some log evaluation command file and performed within 3-4 hours. The diversity of inputs utilized affords a level of confidence just not feasible with traditional shaly sand log investigation. This process also checks and calibrates present molds and geo-models. Feel free to contact our expert Petrophysics Consultant for more information about Petrophysics.
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