US 11,841,476 B2
Methods and systems of determining parameters characterizing porous media from data gathered by a plurality of different tools
Vasileios-Marios Gkortsas, Boston, MA (US); Lalitha Venkataramanan, Lexington, MA (US); and Jean-Marc Donadille, Clamart (FR)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Appl. No. 16/495,389
Filed by SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
PCT Filed Mar. 27, 2018, PCT No. PCT/US2018/024415
§ 371(c)(1), (2) Date Sep. 19, 2019,
PCT Pub. No. WO2018/183223, PCT Pub. Date Oct. 4, 2018.
Claims priority of provisional application 62/476,902, filed on Mar. 27, 2017.
Prior Publication US 2020/0110191 A1, Apr. 9, 2020
Int. Cl. G01V 3/38 (2006.01); G01V 3/22 (2006.01); G01V 3/32 (2006.01); G01V 3/34 (2006.01)
CPC G01V 3/22 (2013.01) [G01V 3/32 (2013.01); G01V 3/34 (2013.01)] 33 Claims
OG exemplary drawing
 
1. A method for determining values of at least one parameter of a geological formation, the method comprising:
determining values for a set of parameters for a plurality of locations in the geological formation by inversion of formation data obtained from a plurality of different logging tools, wherein the inversion of the formation data that determines a set of parameters for each particular location in the geological formation is constrained by certain formation data that characterizes the particular location in the geological formation as obtained from at least one of the plurality of different logging tools, wherein the set of parameters for each particular location in the geological formation includes an apparent cementation factor mn and a formation water saturation Sw that are derived by inverting dielectric data that characterizes the particular location in the geological formation as obtained from a dielectric logging tool;
using the apparent cementation factor mn, the formation water saturation Sw, nd a formation porosity ϕ for the plurality of locations to determine an estimation of at least one of a cementation exponent m and a saturation exponent n of the geological formation; and
using the apparent cementation factor mn based at least in part on measurements in an invaded zone to estimate virgin zone water saturation and drilling into the virgin zone based at least in part on the estimated water saturation of the virgin zone estimated using the apparent cementation factor mn.