Consider the question. FAC -- factual report FAC-first aid case FACHV -- four-arm calliper log FANAL -- formation analysis sheet log FAT -- factory acceptance testing FBE -- fusion-bonded epoxy FC -- float collar FCGT-Flood Clean Gauge Test FCP -- final circulating pressure FCV-Flow Control Valve FCVE -- F-curve log FDC -- formation density log FDF-Forced Draft Fan FDP -- Field Development Plan FDS -- functional design specification FEED -- front-end engineering design FER -- field equipment room FEWD -- formation evaluation while drilling FFAC -- formation factor log FFM -- full field model FG-Fiberglass FGHT-Flood Gauge Hydrotest FRP-Fiberglass Reinforced Plastics FGEOL -- final geological report FH -- full-hole tool joint FI -- final inspection FID -- final investment decision FID-flame ionisation detection FIL -- FIL log FI (M) -- free issue (materials) FINST -- final stratigraphic report FINTP -- formation interpretation FIP -- flow-induced pulsation FIT -- fairing intervention tool FIT -- fluid identification test FIT -- formation integrity test FIT -- formation interval tester FIV -- flow-induced vibration FIV -- formation isolation valve FJC-Field Joint Coating FL -- F log FLAP-fluid level above pump FLDF-Flying Lead Deployment Frame FLIV -- flowline injection valve FLIV -- flowline isolation valve FLET-Flowline End Termination aFLET-Actuated Flowline End Termination FLNG-Floating liquefied natural gas FLOG -- FLOG PHIX RHGX Log FLOPR -- flow profile report FLOT -- flying lead orientation tool FLOW -- flow and buildup test report FLRA -- field-level risk assessment FLS -- fluid sample FLT -- fault (geology) FMEA -- failure modes, & effects analysis FMECA -- failure modes, effects, and criticality analysis FMI -- formation micro imaging log (azimuthal microresistivity) FMP -- formation microscan report FMP-Field Management Plan FMS -- formation multi-scan log; formation micro-scan log FMT-Flow Management Tool FMTAN -- FMT analysis report FOBOT-Fibre Optic Break Out Tray FOET -- Further Offshore Emergency Training FOF-Face of Flange FOSA-Field Operating Services Agreement FOSV -- full-opening safety valve FPDM -- fracture potential and domain modelling / mapping FPH -- feet per hour FPIT -- free-point indicator tool FPL -- flow analysis log FPLAN -- field plan log FPS-field production system FPSO -- floating production storage and offloading vessel FPU -- floating processing unit FRA -- fracture log FRARE -- fracture report FRES -- final reserve report FS -- fail safe FSB -- flowline support base FSI -- flawless start-up initiative FSLT-Flexible Sealine Lifting Tool FSO -- floating storage offloading vessel FSR-Facility Status Report FT -- formation tester log FTM -- fire-team member FTP -- first tranche petroleum FTR -- Function Test Report FTRE -- formation testing report FULDI -- full diameter study report FV -- funnel viscosity or float valve FWHP -- flowing well-head pressure FWKO -- free water knock-out FWL -- free water level FWR -- final well report FWV -- flow wing valve (also known as production wing valve on a xmas tree) F_L-FNL / FEL, from north / east line

Answer this question based on the passage: what does fid mean in oil and gas?
 What is the step-by-step reasoning process to arrive at the answer: final investment decision?
The relevant information is: FID -- final investment decision