US 12,130,405 B2
System and method for estimating porosity of porous formations using permittivity measurements
Shouxiang Ma, Dhahran (SA); Guodong Jin, Houston, TX (US); Ryan Antle, Houston, TX (US); Fei Le, Houston, TX (US); and Salah M Al-Ofi, Khobar (SA)
Assigned to Baker Hughes Oilfield Operations LLC, Houston, TX (US); and Saudi Arabian Oil Company, Dhahran (SA)
Filed by Baker Hughes Oilfield Operations LLC, Houston, TX (US); and Saudi Arabian Oil Company, Dhahran (SA)
Filed on Sep. 22, 2022, as Appl. No. 17/950,216.
Claims priority of provisional application 63/250,435, filed on Sep. 30, 2021.
Prior Publication US 2023/0100983 A1, Mar. 30, 2023
Int. Cl. G01V 3/38 (2006.01); G01V 3/26 (2006.01); G01V 3/32 (2006.01)
CPC G01V 3/38 (2013.01) [G01V 3/26 (2013.01); G01V 3/32 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for downhole wellbore or testing operations, the system comprising:
an electrical subsystem to provide electrical signals for one or more of a porous formation or a representation of the porous formation; and
at least one processor to execute instructions from a memory to cause the system to:
determine one or more dielectric property values that relate changes in permittivity measurements with times or frequencies based in part on the electrical signals;
generate a model using the one or more dielectric property values, the model providing structural property values associated with isolated and connected porosities of the porous formation or the representation of the porous formation;
determine a rock formation petrophysical property value for porous formation or the representation of the porous formation using the model and using a total porosity of the porous formation or the representation of the porous formation;
estimate or predict one or more of an isolated porosity or a connected porosity of a downhole rock formation based at least on the rock formation petrophysical property value; and
enable the wellbore or testing operation based at least in part on the estimated or predicted one or more of the isolated porosity or the connected porosity of the downhole rock formation.