Proceedings Volume Cover
APPLICATION OF COMPUTER DATA ANALYSIS  
TECHNIQUES TO DIGITIZED WELL LOG INTERPRETATION  
OF DEVONIAN CARBONATES  
B.M. MCVICAR  
this article begins on the next page F  
PAPER NO.  
TECHNIQUES TO," DIGITIZED WELL  
Publication Rights Reserved  
prior to the conclu-  
reduction in well log. computing costs and an  
6801  
PETROLEUM,SOCIETY OF  
0
CIM  
SUBJECT, TO,  
INTERPRETATION OF DEVONIAN  
is to be presented at the 19th  
CORRECTION  
THIS  
IS  
A
PREPRINT  
OF  
COMPUTER  
-DATA  
Marshall Development co. Ltd., Calgary, Alberta  
in CIM journals if filed in writing with the Technical Program  
ANALYSIS  
APPLICATION  
CARBONATES  
This paper  
BY  
B. M. McVicar, P. Eng., Member CIM  
Allison-  
for  
Annu  
sion  
al Technical Meeting of the Petroleum  
of the meeting.  
Society of CIM in Calgary, May 7-10,1968. Dicussion of this paper is invited.  
Such  
discussion may be presented at the l9th Annual Meeting and will be considered for publication  
is the  
Chairman  
compatible  
with the computer, for improvement of the processing.  
A
major  
problem in processing log data  
ABSTRACT  
initial  
of graphs  
preparation, calibration,  
allows interaction  
normalization  
and  
A
editing. Once the  
data  
is  
in  
computer  
exchange of techniques between profession is  
previously too cumbersome. The  
accel-  
form  
and  
exonerated,  
many  
convenient  
manipulations  
eratiug  
that branch  
carbonates requires  
the  
use  
of  
The  
aids  
computers in intepretation.  
A
can be made. These are best  
presented  
in  
graphic  
industry  
such as Time Series  
analyst then  
raw  
new computer pro  
applicable to log  
Analyals and Multivariate  
analysis ban  
el@na:-  
for  
st  
F
ourier  
Transformation  
Canadian prospects,  
data screening and new opportunities  
give Important local  
tion of extrdne6us-data and the:amooth:Lng and eri@  
eccdomlml'digitlzed  
encourage computer-log  
form. Visual analysis  
Pa  
allows  
economic  
sequences  
application  
of  
several  
processes  
digital approach  
to  
'seismic analysis provides  
complexityof  
lithologies At the same  
taken.  
digital processing  
f= loga,-  
capability  
Devonian  
In  
paper covers  
general  
These  
techniques  
techniques  
which  
can  
rapid  
of  
the  
oil  
directly  
be applied to western  
Anal-  
be  
and  
have  
anaylsis.  
classifi-  
The  
been applied to Devonian carbonate sequences  
permit  
and  
economic  
ysis. Statistical procedures  
now  
available  
contrib-  
pe@'ba  
help,  
has with  
easi:er  
to  
cation and correlation.'  
data allows  
rec6@tion  
dete=ination  
Significant  
of errors  
correlation  
of  
dramatically  
ution of various logs to  
co@elation@  
in  
the choice  
desired end result. Many  
Co@@tlon'and-cldss-  
the-we'of Linear-Pro~i@.  
of  
log suites  
and deriv-  
large amounts of data with  
references  
are  
such  
as  
core  
ation  
of  
porosities  
and  
time,, the impersonal contact that the  
made.  
These  
_
guidance as  
INTRODUCTION  
to the  
contribution  
or lack  
of datd.-:,Tbis  
@ge-Acale  
attracti" and  
of  
the  
raw  
a
variety  
ng  
a
and  
distortions  
price breakthro@  
facilities,  
to  
prevail  
unless  
well  
precautions  
of  
started@,a."naissance.  
are lndreasingly@vailable.  
the tools  
are  
computer  
These.factors  
simple  
and  
straightforward.  
biomedicine -and tsycbolog& d,an, be cipp@ied diredtly  
con- s@emi -Seol,ogiml mEcpping'techniqudd'mn,be  
They  
allow recalibration  
of.  
idpilt:data,  
the  
Libraries  
-bluing  
hancing  
organized.'  
ofire@B@and  
in-  
@irs  
i968  
Once  
a
in  
log  
@nd  
lfimtion.techniquee  
con@en:lences.,  
taken  
eatimtes  
from  
of  
such  
scieticeecas  
are"a@la-ble  
of  
log.analysts.  
o:t  
to  
logs  
we  
being.  
cmwuter  
necess@  
the  
oflitbol6iW.  
.@s  
Is  
trbved  
th@o@  
with,tbeir,econ@es  
lithology  
we  
ex-  
a@ñB  
and  
fres@  
plotted.'  
general  
techniques  
made  
\
i
·
"
'.  
·
"
,
·t  
,
I
PAPER NO. 6801  
PETROLEUM ,SOCIETY OF elM"  
I
1
1
..,  
i
THIS IS  
A
PREPRINT  
-
SUBJECT'TO,CORRECTION'  
,
"
APPLICATION OF COMPUTER DAT.A, ANALYSIS  
".  
.
-.  
. -  
'
,
.,'  
.
\.  
{f,t;  
\,Y  
j
TECHNIQUES TO,:' DIGITIZED, WELL LOG' .  
,
.
INTERPRETATION OF DEVO,NIAN CARBONATES  
By  
,"  
.
M. McVicar,,' P. Eng." Memper eIM,  
;Al1.ison':'Marsball Development Co. Ltd,., Calgary" Alberta  
J
,
PubUcation Rights Reserved  
,
,I  
This. paper  
to be presented _at the 19'th Annual' Technical Meeting of -the Petrolel.1ID'  
Society of CD! in Cslgary, i.Ry 7-10" ;1.968. ' DiscUssion of tbis paper is invited.  
"'I  
disc.ussion rray be. presented at' .:t1;le 19th Annual MeetiOg' ana will be -considered for pUblication•  
,,r:j  
,
'
"
\
in CD! journals 'if  
'si,on at tbEL  
Writing' Witb the Tecbnical Program Chairman 'prior to'the conclu-  
,
'
-'  
.
- , . -  
,j  
.... "1  
,
,
.
, . ·A major problem in processing log data is the  
normalization and  
editing. Once the data· is in computer compat;J.ble  
form and many, convenient manipul.ations  
can be made. !These .are best presented in graphic  
form •.. -:Yisual of graphs allovs 1:nteraction  
.
initial preparation,.  
J
. A reduction in well. 1og. computing' costs aM· an  
exchange ot:  
between professi'ons is accel•  
,erating the -Utesechonfiques'  
qomputers> in- interpretation.  
new· computer progl:oa.m, for Fast FOurier .Transfo:rma."tion.  
appliCation of seveial· proce'sses  
previously'too cumbersome. The digital- approach to  
'seismic analysis prciv'i.des capability_ in that branch  
1
)
.j  
'With the computer' for improvement of .the  
i
I
The paper',covers general techniques 'Whicb can  
be, applied to western caoad:f,an prospects", and have  
been applied to DevoU1an carbonate sequences.a :!he·  
complexity· of Devonian carbonates requires aids  
Time series Analysis and Multivariate ·Anal•  
nov,·available help  
.
of' the' oil industry'direotly applicable to log  
"
atialYB.i.S ..  
,
(.  
.
These techniques permit rapid and economic·'  
·data screening and new opportuni-ties for classifi•  
'cation and correlation.. Si"gnificant correlation. of  
large amounts of data Yith' references such as core  
j
.
>,  
,
"
1
,I  
'
dramatically in the.choice of·log.suites and .deriV•  
ation of porosities and  
atia.lyais Can be' J:!1ade. These  
local  
time, the ,impersonal con1'act that the analys=t then  
i
has· 'With. the raw ·da.ta,.allows  
a ..variety, of 'errors  
guid,anc·e as to -the contribution or ""!'ack of contrib•  
utiqn' logs -to 'a desired' end result.. Many  
of tbe ·,tool"s are simple and'stra.lghtforward .. They  
and. distortions to prevail unless precautions are  
taken.  
"
'"  
'
alloW reealibration. of- raw input':data, the el1mina-  
i
of extraneous '-data.' and.. the :smoothing 'and·  
INTRODUCTION  
bancing 'of' de. tao :'>Thls permits' easi"er ·recogm,tioD.  
of 1rend:s  
ifieatioD.·tecbniques 'taken-from such  
correlatioD. -', Correlation:and ,¥class•  
,- nuring i968  
a
price  
in  
log  
digital pr.ocessing ,star:ted;.a -renaissance- of computer  
log 'analysis. .ot economical'digitized  
loga. !U"e being, organized.' Large-s,cale' computer  
ana conveniences',  
"
.
b19medicine and psychology qan.. be aPP1:-ied  
to the determination of'lithology. ,'!his is im-  
'proved tbrcn1gb -the  
-
use"of" Linear'Programmirig  
0
Once  
facilities, ;with'. their  
are increasingly:available.· These. factors are com-  
b:tning to encourage computer log an.aJ.Ysis and fresh  
gene:;al _techniques made attractive and  
,
es:timates of-, lithology .are"aVaila,ble :rrom'loga".  
several geol.ogieal mappingr techniques' can 'be ex-  
.
.
'
,
,