CORE LABORATORIES. INC.Petroleum Reservoir Engineering

DALLAS. TEXAS

February 3, 1958 REPLY TOP. O. BOX 36

MIDLAND. TEXAS

.Carper Drilling Company, Inc.Carper BuildingArtesia, New Mexico

Attention: Mr. Marshall Rowley

Subject: Core AnalysisCarper Superior No. 2-C WellCaprock Queen FieldLea County, New MexicoLocation: Sec. 19-T13S-R32E

Gentlemen:

Diamond coring equipment and water base mud were used to core the in-terval, 3057 to 3095 feet, in the Carper Superior No.2-C. Representa-tive s of Carper Drilling Company, Inc. selected and quick-froze sample sof recovered formation on which analysis was desired and submittedthese samples to the Hobbs laboratory. The results of the analysis arepresented in this report. Since a complete description of the recoveredformation was not available, the lithology shown on the accompanyingCompletion Coregraph has been taken from the analyzed samples only.

Queen formation analyzed from 3058 to 3068 feet is characterized byfavorable residual fluid saturations at points of significant permeabilityand is considered to be capable of oil production. The sample which isdenoted by an asterisk in the probable production column of the CompletionCoregraph exhibits measurable permeability but is considered to be es-sentially nonproductive due to low porosity and unfavorable residual fluiddistribution. The average permeability of the seven productive feet inthis interval is 296 millidarcys, and the total observed natural produc-tive capacity is 2072 millidarcy-feet, possibly adequate to support satis-factory rates of production without the necessity for treatment. The per-meability of the productive portions of this interval is somewhat erratic,

Carper Drilling Company, Inc.Carper Superior No. 2-C Well

Page Two

however, ranging from 3.8 to 965 millidarcys; hence, a formation treat-ment may prove beneficial to establishing greater initial rates of produc-tion and more uniform drainage of the reservoir. The average meas-ured porosity is 19.6 per cent, and the average empirically calculatedconnate water saturation is 37 per cent of pore space.

Estimates of recoverable oil have been calculated for the Queen forma-tion interval, 3058 to 3068 feet, using the observed core analysis datafrom the seven productive feet in the interval in conjunction with esti-mated reservoir fluid characteristics considered applicable. Theseestimates are presented on page one of this report and are subject tothe conditions set forth in the body of and in the footnote s to the sum-mary page.

From 3068 to 3069 feet, Queen formation exhibits unfavorable residualfluid distribution and is interpreted to be predominantly water produc-tive. It is suggested that any completion attempt be confined to forma-tion above 3068 feet.

Queen formation from 3069 to 3072 feet exhibits permeability of lessthan O. 1 millidarcy and is considered to be essentially nonproductive.

We sincerely appreciate this opportunity to be of service and trust thatthis report will prove useful in making a preliminary evaluation of theQueen formation analyzed from the Carper Superior No.2-C.

Very truly yours,

Core Laboratories, Inc .

P-J~9r-~lR. S. Bynum, Jr. , ./

District ManagerRSB:JDJ:sw7 cc. - Addressee

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(c) Calculated (e) Estimated (m) Measured (*) Refer to attached letter.

These rec~very estimates represent theoretical maximum values for solution as add' h ' ,started at orlgmal reservoir pressure; i.e. no account is taken of production to ~ate 0: ofwapte: ::v~, T ey ass;me that p~oductlon ISfactors tending to reduce actflal ultimate recovery such as economic limit 'I ,rlor ramage t,o ot ,er areas, T e effects ofhave 1101 been taken into account, Neither have factors been considered ~hfd,: produltct~onrateIS, gas-or! ratsos, o~ water-oil ratios,tion gas and compl t t dri , ay rem m actua recovery intermediate between solu-of ultimate oil reco::r;~Oe;lle~ftc ~t::d~~~::;~oa;,l:!O~~P ;::~;siond gr,avity drai~age" or tz:=: drive, Detailed predictionsoverall reservoir cbaracteristlcs and economic factors, ma e m an engmeermg stu y 111 whIch consideration is given to

TJ~ese nuulysex, opillirJlIS or interpretations are based on observations and mat . 1 r .this I'ep,ol't .~s n,',ade, T~le ,interpretations or opinions expressed represent the b:~;a'~Jup~~edofY the chent to whom, and for whose exclusive and confidential use,COIe Laboi atorrcs, r IIC" <~I"I Its officers and employees assume no r esponsibiliry l dgrn I t Core Laboratories, Iuc, (aU errors and omissrons excepted)' but01' proflt ahlen es s of any nil, gas or other mineral weJJ or sand in connection w{tha~h .mhace nho.war~at.tty ordrepres~ntatlOn as to the productivity, proper oper~tion

1C sue I epoi t IS use or relied upon. J

CORE LABORATORIES, INC.~, ~~--==~""====" __ ---1 /'('/1'0/('1011 Reservoir Engineering;

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COMPANY CARPER DRILLING CCL'1;>A ;Y, INCo

WELL CARPER SUPERIQR .NO. 2-C

FIELD .... CAtROCK ~UEZl'L ....- .....

DATE ON_. 1-31-5\1DATE OFF 1-31-5QFORMATION QUElli

FILE NO. 't:P-J-996 FeEN GRS.. f.~.ki.Nr,;

ELEV 4375' .Df

COUNTY LEALOCATION NE.i

STATENEW .J..!:X.lCODRLG.FLD. iiATLR BASE MUD CORES DlA.dQlID J~"SEe 19-T13S-R32E REMARKS SA!'1PLEDBY REPRESENTATIVh: or CLE:~T

LIMESTONE I :1 CONGLOMERATE 1'0::;'61DOLOMITE~ 1

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COMPLETION (OREGRAPHPERMEABILITY ~ TOTAL WATER ()-{)

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f···~~-n-~~l~~:~;t~i~:~~;:~!~:~+nL11:~~-h-++++rtttttlttlltff·. 3065 '",:.•,~ •....i 9 : 66.5 263 25.1 12~.° 39.0 !O,FG i OIL!10, 61.51 434 21.8~5.7.29.8:B,FG I OIL 1~""-LLl: 11, 66.5 i 15 i 21.4 i \3.9 .6J. 6 ~G.ro i '/ATERII ~4-MlLLHI cr. c I . I I. 3 8· .t-..l2.,-··-·~·:.LT-·-~12 .•~_-+--liL..l_i_-l. •..~_.. l."--J1~-··~--·---·lI 13 10.5 I <0.1 .10.2 : 0.0,85.2 .R,FG I; 14 71. 5 I -c 0 .1 ~. 6. 6 i O. o 51. 0 iH, FG I I'. ! *_RE·~r~:q ~ ATTACH~D LE~TER. . I I I.: :: i j If I I I I , ,11 I ::

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