Geophysical well logging
Involve probing of the earth with instruments lowered into bore holes,with their reading being recorded at the ground surface
Type of well loggs
(logging while drilling (LWD
عمل قياسات ال logging اثناء عمليه الحفر
قياسات قبل التغليف "قبل عمل open hole(un cased logging) "casing
قياسات بعد التغليف"بعد عمل cased hole " casing
parameters that can be calculated or estimated from logs
porosity permeability pay thickness lithology
Type of drilling mud
water-base mud
fresh water salt water salt saturated water
oil-base mud
petro physics
Is the study of the physical properties of reservoir rock and their mineral,fluid aiming at establishement of there properties and the impact on log response and interpretation
petrophysical
show relation between porosity and permeability
and
(show formation resistivity factor (porosity relation
and
(resistivity index (saturation relation