Day 2 Caliper Log
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Transcript of Day 2 Caliper Log
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CALIPER LOG
Simple mechanical Caliper Measures :Hole size, Shape,Vertical
profile of the hole ia!
Sophisticated Dual-Caliper tool
Measures "ore hole size a# $olu%e
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&'PESMecha#ical Caliper: "o( spri#), Si#)le*
Ar%,&hree Ar%, +our Ar%s &hree i%e#sio#al caliper -Acoustic.
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Mecha#ical caliper
&he %easure%e#t are %a e /0 articulatear%s pushe a)ai#st the /orehole (all!&he ar%s are li#1e to the cursor of a$aria/le resista#ce! Lateral %o$e%e#t ofthe ar% is tra#slate i#to %o$e%e#t of thecursor alo#) the resista#ce, a# he#ce$ariatio#s i# electrical output! &he$ariatio# i# output are tra#slate i#to
ia%eter $ariatio#s after a si%plecali/ratio#!
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&hree i%e#sio#al caliper-Acoustic.
Bore hole Televiewer &he &ele$ie(er tool uses a rotati#) acoustic
tra#s ucer to pro uce a# acoustic i%a)e of the/ore hole (all ! &he tra#s ucer is pulse 234ti%es per re$olutio# a# is rotate 56 ti%es per54 c% of epth! Its spee of rotatio# is 5
re$olutio# per seco# -lo))i#) spee 7ft8%i#.! A co#ti#uous i%a)e %a0 /e pro uce /0i)itizi#) the /ore hole si)#als!
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LOG PRESE9&A&IO9S:
&he cal! lo) is pri#te out si%pl0 as a co#ti#uous$alue of hole ia%eter (ith epth!
&he cur$e is tra itio#all0 a ashe li#e
suall0 plotte i# trac1 ;! &he horizo#tal Scale %a0 /e i#ches of ia%eteror i# e
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I9&ERPRE&A&IO9 a# SES
Holes (ith a %uch lar)e ia%eter tha# the size are=ca$e > or =(ashe out> -this is t0pical of shales (he#0ou#) a# u#co#soli ate .!
&he shape -o$al or circular. of the hole ca# /ei#terprete - ual Caliper.
O$al holes are co#si ere to t0pical of ?oi#tefor%atio#s!
Ho(e$er, the o$al shape fro% ?oi#ti#) is #ot the sa%e as
that fro% or i#ar0 ca$i#) a# hole (ear! Ca$i#) )i$es )e#eral o$al shape (ith #o particularorie#tatio#!
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I9&ERPRE&A&IO9 a# SES Caliper %a0 sho( a hole size s%aller tha# the /it size! A %u ca1e /uil *up is i# icate E
