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1. (WO2018222951) LOGGING FRACTURE TOUGHNESS USING DRILL CUTTINGS

Pub. No.:    WO/2018/222951    International Application No.:    PCT/US2018/035521
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Sat Jun 02 01:59:59 CEST 2018
IPC: E21B 49/00
E21B 43/26
Applicants: SAUDI ARABIAN OIL COMPANY
ARAMCO SERVICES COMPANY
Inventors: HAQUE, Mohammad H.
ABOUSLEIMAN, Younane N.
HULL, Katherine Leigh
HAN, Yanhui
Title: LOGGING FRACTURE TOUGHNESS USING DRILL CUTTINGS
Abstract:
Provided are systems and methods for determining fracture toughness of a subsurface geologic formation. Embodiments include collecting (from drilling fluid circulated into a wellbore during a drilling operation) a drill cutting generated by a drill bit cutting into a subsurface formation, preparing (from the drill cutting) a drill cutting specimen comprising a miniature single edge notch beam (SENB) having a specified length in the range of 1 millimeter (mm) to 100 mm, conducting a three -point bend testing of the drill cutting specimen to generate load-displacement measurements for the drill cutting specimen, and determining (based on the load-displacement measurements for the drill cutting specimen) a fracture toughness of the subsurface formation.