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COMMONWEALTH OF AUSTRALIA

DEPARTMENT OF NATIONAL DEVELOPMENT

BUREAU OF MINERAL RESOURCES.

GEOLOGY AND GEOPHYSICS

RECORDS 1953 N°· 65

ELECTRICAL 'LOG'GING OF NO·2 BORE,

ASSOCIATED. AUSTRALIAN OILFIELDS N.L.,

ROMA, QUEENSLAND

by

WILLIAM. A. WIEBENGA

-

"

-_.

....

•

COMMONWE/,L TH OF AUSTRALIA

DEPARTMENT OF NATIONAL DEVELOPMENT

BUREAU OF MINERAL RESOURCES.

GEOL.OGY AND GEOPHYSICS

RECORDS 1953 N°· 65

ELECTRICAL LOGGING OF NO·2

ASSOCIATED BORE,

AUSTRALIAN OILFIELDS N.L.,

QUEENSLAND ROMA,

by

WILLIAM. A. WIEBENGA

I • IImlODUCfIOI •• •• ••

•• •• 1

•• •• • • 2

the lingle-Point Correlation tog. • • 2

ThQ topar the Lower Part attne DoN., 3

If • COU~WJIO. •• • • •• 3

,. Ur&,fijl_ •• •• •• 4

(1)

Plate 1 bsoetatedA1ustr'a11an Oilft:el4a, 11 .It'. " . .1 DQre!,' Single-foint Reslsta:r.tOe to, an« Dttclt lamp e log. '

-- .. ---

(11)

f:he featlU'e$ of the single-pobt resistl.!UlCe log., obtained in A • .1.0. No.2 Boft.a •• -are desor1bed. S1qle-.polntr-ei$1~tanc.t aeU"'potentl.1 and geologieal log. of the lower section 01' th.e belle hole ue shown. !be results indicate that eleetrlcal logg1:ng can be etfeet! vely used foreonelat1on proble.. and tna:t salt water sanda in the re$~ntd.rroeks (tIll'! be detected with reasonable cel-tainty •

.... _----.' ..

(Ill)

, • , ,'lI"Qmzr;;:ws Ia 1,;2 Assoelated Aturtral.lan 011:f'lelds If.I,. started

their second GXplorat!)ry borEt north of Roma, Quee:nsland. in a lease re:terl"edto as Block 1', nDt tar hom tbe old. .b'-. a .B .0.1 and R.B .chiC-.. the appro.x;lme.teco-o~dl_tes. ot themre are I latitude 26£1 29-;'; S., longl taae 1480 ;0 ':I. On theRoma t. OV-. ill. 11e ma. p ot the !ustt-alianaurY.8Y c .. ·.O~...~ a. sar.!a. the eo-­o~l. nate... are 1.,6310, or, more exa. etly .t6,366. 0 14M8 east and 708160Jard$oorth. tn. expected. .ptll was 11.600 t.et to basement. fheColDpatll" S Iuperlnterdent,Jir. H. 1 • linns" requested the Bureau of Mineral Rosonreea, Geophysical Section, to 'Ilmiertake nll logging 1.lalnly ~o tacl11tate correlation between formations encountered in alfferent bar. holes. It was hoped that the U$eot well logging WOUld avoid the :necessity for coring in anY' future boresdrille4 1n the aame area. fbe Bureau had available a ~oo-teetsi~lg1e.PQ1nt .. 1'1 .... logge-%'. It was thought that \"lith ~ fe. alterations tt>.;;1s instrument could be uasa 111 the logging of the.' . 3,600 t..eet bo .. ,re. Thsre .. toret a geol1hysieist with the ,oo-teet' "WIdeo· logger and. SOlIe add! tlo.tlal equiplllent was sent to Roma to' do the well logging ..... the bore was expact,ed to reach baS8lU&nt in lanuarYt 19;3.

This shQrt report is only meant as. ac~&nta.P' on the well logswhlch 1ier~ recorde. in the A.A.O. lfO,2 bore' ~u1d which are ;rs~~,!'odueed in the aec(unpanying' plates. . .x1ther the geology nor the theory of well logging wl11 be explainfi'd.

11,. A Aff.~nAlSR DaQa . A .. "W1deo· .. shot hole .logg1ngUn1t, bullt by the ~1ell

Instrument Deve.loplng 00., P.O. !ox 2406. Houston. fexas. was used ..

Welcht I

Graphs ,

the apacifications of this 10g,e1' an , ....

100 lba.

Jeeorier I

Batteries ..

Cable real :

Dimensions:

:Resistance scale "

Seale of records I

11ncl. ... polllt 1*$&18._ 10, ollly.

l'Ul11 automatic Bsterline-.&ngl.Is mil11ar.lmeter.

One ittrl&S$ 4' .. at 6 volt • three" S308. 45' • Hand erar.bd., ;00 te.t cable. Logging speed not cr1.ttcal, about O.M toot per second.

Stranded steelt neoptene-eovel'e4- tensile strength 600 be., OJ). 0_.143 inch.

2~· long x 14" 1lf1de :.It 29' hlgh ..

? 10. 2" ;0 aDd 100 0_ per incb defleettoD (approltima tell') •

boo of 6. Ib$ ... each; 10". long.. ttq ().D .. One to be put ill the _«pit at the surfaee and one tor 'the actual log,lq.

20 teet pel" Inch"wlth an adapta'!on to g1ft 10 teet per inch. .

- 2 ..

!he u.n1 t has been designed tor '1.1$8 1n llelat1vely shallow holes less than ~O t •• t -'p. In. order to .. .,t the equ.ipment tor logglng the deep 1.4.0 •• .2 Bore, the tollc:wlnl modifications were __ .-

fhe electrode was suspended on 4.000 t .. , of double illsulated telephone w1re, WOu.nd on a dru. Pol' the electrical contlectlon of the electrode with the logger,"".ooO teet of .. plastlflex wire was u.sed. The drill rig sened as a poUD4 electrode. fhis arrangement wa. u.sed to obtain self-potential and single-pobt resis _nee logs. For So self-PO'tential loi,· the current was fed into a D.O. amplifier. !heoutPllt of the :0;:;. ampUfi.er- 'Went direct!..v to the Isterllne-.!ngUs]IUl.lammeter recorder.

/ q-e- Cd-/--Y:S-

On 'late 1 the $1l:1gle~polnt resistal'lCe log aM..,.4 ditch sample log are shown side by s14.. Tbe ditch.ample log 1s made from anexamlnatlo!lQt rock eut,tings as they eomeup from the. hole with the drilling .mwl.ColtSequently ,the depths shown in the ditch sample lO'g for the changes in f~tl()n oharacter are, O,U, an average,about 30 teet too peat. whereas th. resista._ 1o, is shown on the. correct depth seale. then this 1s taken Into account the &pee_lit 'between the two logs 1s qu.I te tall".

The logs show th* i"ollcnvlng characteristios wb . .1eh possibly could be us-ed in tat1U"e correlation _l'lt .-

(a) A high resistlvlt1 b4!!d between 920 and 1,050 feet, lnterpJreted a.s a garnet sandstone. Geol.oglcal evidence indicates that Itls a main &esb. wa'be ... horizcn in tbe area.kllnlty of the water 1s less than 10 grairl-S per galloa.

(b) ~he boundary between l'1pp0r \'.lloon and Middle Walloon fftay possibly be indicated by. a lew ras1stiv1 t,. peaks at about 1,2"0 feet. !hese resistivity peaks may lnd1cate carbonaceous sha1e$or coal bands.

(c) roo wno.le Lower Walloon Coal measures zone between ,,2S'O and. 2,260 is characterised by l'J;'llmerous high r9si$tlv1t1 peaks whien can be interpreted as coal se_s or carbonaoeou.s sha1es. A v~ry eO.flsptcU.O'tlS ali.maaly bet_en ",465 and',48" t.at probably represents a 20 feet cOllI seam or. carbonaceous shales.

(4) !file· l3UDdaliba Bard_to__ ootween 2.260 and 3,.100 feet are .e~acterl_d blntJl1ercus .. a.tlOmal.les, completely d1fferent In eharacter bom tho sl'lal-ply peaked auomaUes of the toftr Walloon Ooal .Ill&asurea.

(8) The Ootlndal"Y' be~n the ~ Sandstones and the Hoola,._ber Shales 1s crdlracterUed by fA sUGden. drop in the general resistivity tram.

.. 3 -

(t) The iIoolayemberShalesdo not ehow much charaete.on the log. !be I'esistlvlty i$ about the lowe.' of the whole section, indicating a higher salin! t1 of the pore solution of the shale.

(gl Below J,370 .feet the sone 1vitheeonomlcal possibIlIties is :marked by alternatIng high and low resistivitIes" interpreted as alternating lJed$ of sh$les and sam­stones containing sal.twater, ~a$ and 011 tra.ces.

A blockage in the hole at 3",2 fEJet prevented loggins to a lower leve2.

%11&1 ·lQu 2[· .tbI· . LiI:1i:t."tm . 9l' ~ liE' or

On Plate 2 ge'ologlcal, selt-.potentlal. and single-point resistance logs of the sections bet1l'IGan 31410 and 3.5';2 teet $re shown. The amplitudes or the a.nomales em, the self-poi;entl&l log are relatively small, no doubt because th,e log waamade lilOre than a week after this ,part of the section had been dr1~ledand consldel"abl.e mud Lnfl1trat1on had taken place. ~lave:rtbeled, the results suggest the following interpretation rules 1-

(a) SaIlds or sandsto:nes containing ga$ and/or 011 01'011 traces a.re cnal"acte1"i2;ed \11 Ino<ierate nelati't'e self­potentials axd l'llOderate to high resistivIties.

(1)) Ian4s or sal'ldstOlleS containing $3.1 t water are eharact$:r1_d by h1gh negative aeU'-potElut1als a.nfi low to moderatEil res1st1Y1tles.

(0) aalea are'eilaraoteriaed by the absence of nega,tlve self'.-pottlutlal kicks and u.sually show low res1st1 vi t1es • the self-potential of the shales is normall.J' taken as the zero reference 11M tn well-logging pr~lQtic ••

fheoeotu"l'$nee or gas and 011 in what 1s call.ed. on the ~logleallo't :fine-pained sandstone at3t480 teet and Well­oemented sandstone at 3",20 .t$etsnggests that the pre. __ of 011 111 ths .. sandstones. 1s .legelycontrolled b1 the po.reslu. Ionecti (19;3,p •. ,.) p01Jlts out that there are no 1mperYious brulds .lnthe oil.-sa.tA:.d. £lee.· t1on pamtl'. ated by t.he 'boJ'$ and Stl.gg .. €S.'t". ests that wnuld saturation is lJrobably controlled by the $1£.6 and $hape ofpores(1n other wordstby permeabl11tle$).-

It \vasl.Ulfol'tunate that theelectrlcal log&il'lg eould not be eon.t1msd below 3,.,52 teet so as to inel.ude the lowest oil sand.

1 • Sil1gle-l}o1nt resistance logs, 1:t posslblecomblned with self-potential logs. probably can ooeffeet1vely used tor oorrelat:ton problems in the ROlla area.

2. .ingle-point resistance and seU-potential logs caa be u.sed as a tool. in detecting salt water horizons 1n the sone of cll-bearing res.rvolr rocks.

3. .. . It . are l:i.ltely., but t.his has not. been definitely eatabl:tshed. t t the occurrence of gas and oil Inthe zone of oil-bearing reserVOir roeks .1s la~ply eontrolle4 by the pOD s1se (pem&abl11 tV).

Plla&iUiu t

-4-

!. , :JltiOR&D

Test1I'lg of Oores trom A,'!uIQciated lu:stra11aI1 011tl&ldsIf .1.. Well NO.2. Roma. Queensland,. Bur .. Hiner .. H .• e. . Ge.ol. &: Qaophp .. Reeords fifo .195315'2 •

(WILLI. t. WmmUGA) l&i1lilDi.,,',l-

Original - G$ophysical Llwary. 1st co»J - Chief Geolostst.Cu'berrs. 2l'lI. ·.Associated Australian Oili"lelds. n.L.. 1\0_. 31'4 .... Under Secretar.vt Department of 1ilnes,QtaeerlSland_ 4th .... GeophySical t1'brar'y .. ;th -.,.. it • 6th ft... •

1----- -------------=--"

\, )' '-PLATE

! GROUN LEVEl

--·--CR-,-T-'-'-'E"-O"U"-S"i'==· = ... '=.= ... =~;::t- -'O~~~~~ ~ ~O I>'.AR1Nf

t ;0

SURFACl SOIL AND BROWN CLAY

SANDSTONE, son [)ROWN AND GREY ClF\y

100

/00

300-1

dOO

500

500

100

tlOC

300

i(100

I luG

1100

'!joo

i~OO

1100

\500

1900

2000

?l00

1100

2300

/400

2500

'(GOu

"00

1000

,900

JOOO -

3100

3100

3300

3400

3\00

3(;00

REMARKS:

,

L

~'i\KM_r JA~uJiUNl, ty1,'-,I0i Vi::'

SAllNfTV I r'Sc, if--lAN ',0 GRr,ll\j,-) t'I-P (,II,II\lN

,-""--. . .. ----

'6CUNUARy Bl TWllN lJPPlR AND MI!)DU' ViAl, LOCH .. C.Of:l.\

, , \

WAlL~v'"

""r A'_,L.)i-\lJ

B'JUNDA\W I:)LI'fiIl_ll\ l_>":'Wfk ~\A:'I_OON

COl\~ MfAsL'Rr:, :':c, ..,UNnM,qv.

SANDSTUNE.. iJURA'):,IC - U·tlP'_K lkIASSIC)

--- i'lQUNDARY P[IWfLN bl,N' ... AMM :)AND:~-I'!N[ ~ND ~OOlA'l'TMBlR SHALE,

f.-- 10 --+-- 10 ......J 'OHMS 1 QclM:~--·"1

--

--

!)OR! H:}l I:. DIAMI r[p : 8~'

(I.JPlJfk TR!A::,,c)i' \,'P\il L Tll,lf\SS\\:)

GAS?

:::,A1T WATER Bf()<',

GA'J

OIL TRACE

G,lI"S !\ND 01'_

BO r ,01".1 GI'L SAND

LO(, DID ~OT ?El\.l,H lHr \!,o r rOM lJf THE !-IOLE

LEGEND

- "1 'JA.NDSTONE ~ ~_] SH'Ll

COM MNDS

MliD Kf:,IS1',VllY : 1-(' OHM M[TU1. CARBONACEOUS MUD l~rILlR.~liON HIGH

~lO'-OGY FROM H J l VANS ~ J TONKIN ,-ONljLOMERATE

DAT[' HB. iC)~J LJ~A 'vJ~<N GEOPHYSICIST

~ z: o

"'

300

.tQiJ

SliO

1000

1----1 I = L __

---- _.--",I -==-.. ___ -'_-+ ,~ ~ ~ 190

I:J LC~ =

_ - ~1 c'" ~. -.----- -- - -

I-:-==~~

..... ¢:~~ •. ~0-,'" ...v--' -'"

-.. --::---

cilj

( ie

JB5 400

"'5 4(;~ 4 1\

.----------+ 10 (~J

';100 'I \ (1 <',25

1100 -

i:hJU

\400

11C)C'

.'--J . 1(1):'

\)IU I:} ('.)

'340

IA00

'430

14100

"[JUO 1 c=='. .--. - ,- iSl\

.~

. c;--_c,::~~~ !

J:C'--'~ rv ---, '"

!d',S

1100

. 1 -: ~ !Hlj(" ,c:f---- ~

dUU

-

)(Uo --

~

_'5: "': C::::-'

1)<l" J--cc~~.C:r_i----"l-

(bOO

lciOO

2900

.c4' 23'-'5

~~'.i;--::i- /lee L0

c~~ ''I:::; .-.:::...;,..;, - 'j'" ,'4l0 ~ -,,1\,,0

~,L-2!!~ i'.SS5

'5 1-1 -=r="" .. ~ .... ~.~. t- 1955

,-

2980

3D4-ll

~IOO

~\(Q

W---h80

J ---.. \,'40

,r

'::: 3300 c£

Y\.IO

~~~E~~3451 ~ 34 It;

3500 _ 3489

GO -\90

1'::)0 - ('10

1lL)- 3e,

.e14~ -4GS ltv) .tIS

All:> -SIO

JIG - SeQ

\~'3l) -1',0

110- lBO

-180 -t)0(\

500 -t\('iJ 510 83S

PdS -8b\)

!I()U - :',\0

1110 -' 1 c' 5

li8':> --';,'40

\JIO -1';[0 1_)(I)-Ij,to

I )4Ci - !4CHl

1400-14.1U

!~l1S -IIl!U

o;,',II(] (()?(\

',ILlY ::'ANDSlONE, GRf:Y SiJ)-T WlTH THIN COAL BM~D~) G~EY ')HI\'._t

SANDSTONE l;~FY SOFT U"PBllNACFOlIS SOME COAL AN\) BPl)\'/N SA.NDY (JAL

SHALE, "KFY, SAND( SANDjT(}Nf, l!\P.hIJNACEQL,~ . ..ikFY ::i!\ND~WN\: ~L'rF (olOURED, Sulvl£. COAL

SILTY :iANllSTONE flWl ,)AN'Yjfl)NE, CII.RBuNAU-QU:), GR'lY. FINE TO ME'';\UM. S()M[ SHALL .4ND lUi'lL !1-H-\r v UU\H QUf\I-\Tl I 8ACME Nl S

';I\'\jD,)I\l~[ AND GP,',T, f-!NE T0 lOAR:,t \VnH ~UAk\ 1. n~l\ljMtNr:; ;)\)1\'1\:. :')HAlE II,NL 51lh!ONF

(f<,\i,~'J\f\(l:l)U'l ':iHA1..f AND ,(Hq (~P\Y .,11 TS !ONI-;\NO ',,,",,OWN d ,tl"y, AND 'JA.N!),,) 'ONt Mt TJII 1M TU :::-0 AR~r ~I\NDSTUNl, MfDlUM uRAIN, lARB0NAU~'U'1_ -JIU';TllN\- r~):(I:\ . L.M{I\ONAUUJS JHAlE ,O\!l,jD (~lA' ;A.Nt))ll)M, I\.lr ,)lllM, l.iI!':J,

Sll.r)TUNf ANLJ :::'HAlf. I,-,~tl', · .... iJNALL0US 'xlMI ')J-\NDSTONf_ AN\) :"',lllY SA,N[):,I, '" . f."i(DIUM TO Fll'oJl. SAN'JS1UNt_, \--!NE GRI\IN AWl l.i-!.:-' )Il Tc.,IONf

SANDSTONC, MEDIUM GRAIN, '~.'I,'-iBUNA(LOU,) SOME S4N f

AND GRI-Y Slll::,TONE. SllME G~lJ:N ')1\.T',TuN't: tIl \':'\0

C,AND:1IONF, ~1\-_DIUM C,h,\':' •. S,~A' __ t, ll\l..I:Y 1)\l,:1"SN I\NO TAN ~OMt QUAl-n 7 Fki\I..JMlN"j

SAN[;, ;IONE 1,II_i)111'\i (',I-\r,\~j, '),1f..1\ SHAd ~,I"_iI111Y

',:' i\I-\t)UNAClOU').

Sf\Nb:5T:)NI, ~,t~J)ll'M (,WI ,~kI-Y ,h,\\ \

~)fU\ll, GRI,'Y 6..N';~' ",i\!\j\)')luNl \\I!TH Ul:i\\<,1L FW.!\i,--,~\tNf:::,

SAND,;lllNf ,~~II_TY ~)AN\)S1Clr>..Il AND C;U'i Sl-jt,\J

'-;P.,NiJ~)lll"Jt \ !''It_ ",Il,AIN 'J\)~.\'. "Ltv ~LIAi l

')AMJ'.Ir,\1\[, Vf',)IUM Te c ,:1 LIP.,;; \ A\\D ljP.,iY )~j,\

'ltiAl' I',\l,f'r ':J AN !)"y }-'INU SIV .. ~)')'(}~I\ t,~\,f)IUM C1,,\I,~

':)!\".;r~.,I'.JN~ _ liN l,U,!\IN 1\)., I,~~\ ,-,,'A,!

~)HAll f\!\j1J )At-JlJSTC~Nl, f'~H uVA!"I P.iJL, ':;, IC,H~!..l ::':l T'r

SI-<AU: ANlJ ;f\J~i)Y ::,HJ\Lr I '.>I\ND:;' JNf Sl1)"H ~-JI-1H N ,I I\.YS 10NI- . .:JANIJ'J TONI:. '!NI i..Y,l\iN -,I-"\~~ AND C(lk,'-\IJNAlf 'JU') :iHI\L ( , '\"'J!) ',~,'~f N (I ;":1 ') lONe ,l~AL ~i\\-\P,0Ni\," JL) -;HALE I!,hD ':,1\l\JiJ_' i ":)l\it,

'~AN[r!i()NI ::--oHAI.[ liND l/l,\<b'~IN,CI.',--', ,:,_:S .,HI\I \ ~J(J).,n \,;'~H N ll'r'Q,1T\ ') \l8Dl.jLl " ',fltl,U AND ',.I'iR[j:..1"ltl,Ci_JU.3 ')fiCl.LL ',\,',11\ :)~\~\f"

)AN[l:, TlJNF 0CG\:,ll'NI\',_ lOCl.l fl,1IN[IS

~A~D::' 1 ON\.. ~'IUY :N rUIH:, ,_,t.(;:\ SHAl [ AND '"Ap'f',(lNAltCU') C,!;I\LE (\lCi\')I(ll\iI\'L (1J"\l BANDj,

'-,q,\1 \- i\N1J \_.\P 'JUN,\U \llJ':> ')H~U '-~(!1,1t S!L 1 Y ':,!\NlhlUNE lC,I'.,~ BAHD

',HAJ :1(111 1\.) 'Li/:.'~k LJ'q\'l '-"II'u1if'LY ,,-Ml:.\UN,I'.,U 'J~{-; (;UM! ),I'I",D

')HI'Ilt,,'-j(I\H '_l\k?A,~j,lU'J!') :'HI\If. I'I"![) COAl, '-)UM~ C,,~~\I,)IUN\ -'lNlj ~~,',;, \.N ':If\Y',Jl1Ni

?'c ()-1',I'J) :jHAU 'A'I~h (\.\1\1._ ,1l,\JU '~!\hjl'·j!\Li:\..lU~ ':l"A!.;: \-',A,Nlh cJMJ:<,i'liNt Mm Sill'! ')I\NlhluN\.

(~6J-i'?S.,

(190'i'90~

(980-3(]1(

,'lJlh 3D40

3(fl~- 3100

3Il}C- j'r',u

JI(,' :\1·;'/

3141 31bl llbl' r80

~l(,:n -- 3410

3410- 34S1

3ASI'JA1~

34-1(; -3469

!)'rl,I::,'ll :\~i) :)I\~i)r \IJf\\l- \V'(!j (),V,P/l'~I\l~iJ','~ ')'-;AL~

A'itl cor,', MNDS '-'llly':, '--,!\N~)::, [',',"4[

:,I';,.u : __ ~krlONMJiJUS :}-"AL:- Ah'] u','\'~ \',',1\-1 SI\~'J) lONE l)!l.ND::'

SAN\l')IClNt ,','\Ii- ',-,l-J}\IN ',VITH ''':',:,I\W_-L \"P,II.I'I ~1\'1Ll AT {,j.?')' :"',\~1t j,II'L!_

')1!Al:, ,:, .... u,llCN,\ttOU') -,Hf,_l .\NL1 ~OAl_ ;UM\ ':'/\NU':JrONl, ",'Hz" i- Nt'_ CPJ,IN_

':,rlll.ll 1~!1':--1 ';OMt lI\R~uNAClUU') ;":It:.LE ,1;1\1'') L,0i\:, SA"J~t;1UNf, IINt- GkAI~ \!,-'!IL.j COAfhl.. C;'-;I\INlfl fJ,ANU

:JANllS-10N!:, rlN\. ~O ~:,i_IJIUM "01,11 :;>1. .... '11_ '~,"'L' lIl.RDONAUOU:::' :,H!\;Lt

SA.NDSTCNf ',/\-.?;V Fi~L GP.,t..IN

SHAH, ')O~'l :,'A.li.-1,0~i\UOlIS )HALE AND IT:Al {'A1~~l:' ':;AN'J':l H1Nt

C,A'lJDC,:ONF, VEkY :11'111 ~JIl,A\N :,IJMI: SHII.U_

'-,H,I.,U. ':J0MI_ l Ak~ONJI,"-:EOUS SiJAi l .'l,NlI (l)AL

~J'JMr SANDS -;'ONF

Sr'lN)))f(1Nt WITY :,Ht\L[ l.)N(;'"OtvlrR,A'lL

~~iAI\, ':I\PkQ"JAr:!,II)CJ ,S\-!f\U_ ';l)Mt: nPF ,-',_1\.1' S()Ul. FINE C,:\Nll'i rONI-

SA,N\)::, 1 ON I" f 1M l,~r"N WITH :,H/Ill, ': t..RbG~I'IU ULI" SHAll A"lD PiPE U A'( ::'OMf mAI_ ~,HM[, ('tl.RP:,(1NAlf(1US '·,HA.t[ I\NT) p\Pl l'"I\'{ 1\'111< ~)DM[ f IN: GkAl~ jANllC,TUNI

)ANQjl,~Nt, ! INL (,k~,,~, ',~':1!1 ANGUi_/IR S'Ii\l t. CQNGll'!v1L?nL_ ~:~NI)')10Nl I-I'l( GIZl\lN_ OU:.A:,IQNA' 1-'1 rJJ 01 SA~D:"\("N'-ANt) SHAI t'. lONGIJ1Mf.RATl_ SHA.lf WITH :,AN'JSIONl BAND Si\NDSrJ"lt WI!',"' SO'v1l ~;H.ll.ll

SHP.U_ I\Ni) ~AND'r SHALE SOMf 'jAt-.DSTJNE

iilTERNI\T'NG TH'N g!l..NDS 01- SANDSTONf fiND l.fACHlD SHAlE, u\I-\I-)ON,t..[f.OU'i AND M1CA([0US WIlH RU',I COLUURED p\.t\w Mp.,nu~ SllMr SAND,) lONE AND ')HAlr- (ONGlOMFR,t.:rE IN NUB LOQE,

SI\NDS lONE., liN[ TL) ~I[DIUM WIT4 SOME COARSl GRAiN 'Je,l-,n ,'::'RE Y I'vml :)OM[ I Hl~ 5YAl ~ B!\,NOS, GAS )i10W J4~J' l·Btl'

:JHP.Ll AN[) SANDSTONI

~~~~_~Tl1~l~lDl~(~~Dl'f\\~'f f n~ll~r~Dli,IL~ g~MFBO~~~M lJA:::,

SANDSTONE, UlJHT GlJ,fY. FINE TO MtDiUM_ SlIGH1LY SII.:\Y SOMr THIN SHCl..LI: BAND':J_ OIL :;HOW 3;11'1)" 10 3Sll' 6 ".

SHOW

.. i.·.·. '.. ..'54\

_ ~~~~~T')5413~S9 1%'3

31J1B ! 3(;00 3590 :.c" , ,'" 35gB

SHALl:. _ SANDSTONf_ n~l TO MLOIUM_ Oil SHOW :154<3'4' 10 :~,)S3'1C1': SI1A.LL 1'.'11"1 S!l1l1~\tn ')ANU:::'IUN[ BAN,):; CONTAINING Oil SilTY "ANDS1QNf WITH GRIT MNDS :,HA.lE \<,,_I\CI\ lOMPAL T, MICAlE(lU':J_ c:,/I,J.J11'.>IONE, Wf-OH_, ~INl v\\AIN WiTIi SIO["IH_ "J\\Dl1lt:'i_ l'l·l,i·,NITE . _....:.... -~ 3(, II;

WELL LOGGING, ROMA, ASSOCIATED AUSTRALIAN OIL FIELDS N,L, N~2

SINGLE POINT RESISTANCE AND DITCH SAMPLE

BORE

LOG

G38-S3

l

I. i

,

f­w W L....

B~O -, I

.~

3350

3\00 1

3450

3500

3550

3(;00

SELf POTEN riAL LOG

+ \---1

M v.

SINGLf:. POIN r Rbi::> fANe! LOG

TENTA liVE INTERPRETATION

) --- SAN~STONE AND GAS

---- SALT WAfER

-+--- SAL WATER

~ GAS, AND Oil TR1CE

f ;

3340

, , : .. "

~::-=~ ~~- '~c~

. ! • • '. I r:-- -_.-'-'...-:. ;

-- - - -

- - -- -

..... - - ---

3380 -+=0-=-=-=-+ - - --

---- -...... - - - --- - - - -

,. ',' : .. ':"

, ',:' '.'"

- - - -

.­- - --

342.D -.- -: .- . . '" '" "'.' .

3440 -

SANDSTONE 2' SHALE 3' SANDSTONE 3' SHAI [

G' SANDSTONE, SILTY.

'?' ~HAI F ANI) SANDSTONE

II' SHALE.

G' SANDSTONE THIN SHAll: BANDS

rJ ALTERNATING SI\NDSTDN\ .A.ND SlHALE

'2' SHALE

8' SANDSTONl AND SHALE-

C'3" SANDSTONE VERY HAPJ' 1'3' SANDSTONE AND SHALE

8':3' ~ANDSTON[

i SANDSTONE AND tJAlE

l SHAH 2' ALlERNATING

A'G" SHALF

5' SANDS rONE WITH ~HALE

32' SANDS lONE WITH GAS

I-

!)AN~S

I

i I· I

-------PLATE.2j

1\," SHALE i

I'G' SANDSTONE AND SHALE VFRY H~RD OCCASIONAL PEBBLES 5' SHALE

34(;0 _ ; ~~~-;:'-7 4'b' SI\NDS TONE AND SHALE

- - --~-,.. ~ :-::~

3480 -.:::: _ '

3500 -

IS' MAINI Y SHALE

! 12' f-INE GRAINED SANDSTONE, GAS!

ii

I' SHALE

29' SANDSTONE, UPPER HALf SHOWING OIL TRACE I

~ SAL}" \\ATER

--------__ __+_ JA.NDS10NJ: AND dAS AND OIL

35 ('0 -' ':::; 0 0

~:----:-1-' '.

I 4'1" WiLL CEME.N1ED SANDSTONE tHOWING GAS AND OIL

(VEry TIGH1 SANDSTONE)

--- SALt WA11R I

I

~- MAt OIL SAN"

I---APPRO~ 5 --l OHMS

WELL LOGGING.

354.0 - ,

3(;CW -+- + +

+ + + + +

+ +

ROMA.

SANDSTONE

SHAl r ~ANlhTONE ',vITH UPPER 4'G" SATURATED WITH OIL, SOME Oil SHOWING IN LOWER 1"~'" -HARD SAN05TGNE WITH ~HALE BEDS

ALTERNATING SANDSTONE AND !SHALE, SMALL SHOWS Of OIL "ND SANDSTONE BANDSJ

8' COARSE SANDSTONE WITH PEB1\lES AND OCCASIONAL

SILTY BANDS I

13'b" COMPACT BLACK SHALt., VfRY rC:OCIGUS

G'\;' HARD SILICIOUS :)ANDSTONE WliH SIDER I TE.

l' GRANITE CONlJLOMERATt (MUArORPHOSED)

GRANITE I

ASSOCIATED AUSTRALIAN OIL - FIELDS N, L. N92 BORE

GEOLOGIC, SELF POTENTIAL AND SINGLE POINT I '

RESISTANCE LOGS OF LOWER PART OF BORE

'vJ~A uJ~_GEOPHYSICIST uephys/(d/ Sedoo, BUfUU 0/4finerd/ /leso(//yts, fieoloW-1 ueoplljs/[s. G 38-54