CORE LABORATORIES. INC. Petroleum Reservoir Engineering DALLAS. TEXAS May 28, 1958 REP'LY TO P. O. BOX .337 MIDLAND, TEXAS The British-American Oil Producing Company Box 474 Midland, Texas Attention: Mr. C. E. Brandon Subject: Core Analysis Hall State" F" No. lOWell Jalmat Field Lea County, New Mexico Location: Sec. 11- T22S-R35E Gentlemen: Diamond coring equipment and water base mud were used to core the interval, 3893 to 4065 feet, in the Hall State "F" No. 10. Samples were selected at the well site by an engineer of Core Laboratories, Inc. at the direction of representatives of The British-American Oil Producing Company. These samples were analyzed in the Midland laboratory and the results of the analysis are presented in this report. Surface gamma ray measurements were made on the recovered cores in the laboratory and the results of these measurements are shown graphically in conjunc- tion with a reduced-scale presentation of the core analysis data on the Core-Gamma Correlation graph accompanying this report. The Core- Gamma Correlation graph has been plotted to the vertical scale of five inches equal one hundred feet for your convenience in correlating to various formation logging data. Yates formation was analyzed from various intervals between 3893 and 4012 feet. Average core analysis data for the permeable portions of the intervals, 3893 to 3963 and 3991 to 3997 feet, are reported on page one. We sincerely appreciate this opportunity to be of service to you, Very truly yours, Core Laboratories, Inc. District Manager
The British-American Oil Producing CompanyBox 474Midland, Texas
Attention: Mr. C. E. Brandon
Subject: Core AnalysisHall State" F" No. lOWellJalmat FieldLea County, New MexicoLocation: Sec. 11- T22S-R35E
Gentlemen:
Diamond coring equipment and water base mud were used to core theinterval, 3893 to 4065 feet, in the Hall State "F" No. 10. Samples wereselected at the well site by an engineer of Core Laboratories, Inc. atthe direction of representatives of The British-American Oil ProducingCompany. These samples were analyzed in the Midland laboratory andthe results of the analysis are presented in this report. Surface gammaray measurements were made on the recovered cores in the laboratoryand the results of these measurements are shown graphically in conjunc-tion with a reduced-scale presentation of the core analysis data on theCore-Gamma Correlation graph accompanying this report. The Core-Gamma Correlation graph has been plotted to the vertical scale of fiveinches equal one hundred feet for your convenience in correlating tovarious formation logging data.
Yates formation was analyzed from various intervals between 3893 and4012 feet. Average core analysis data for the permeable portions of theintervals, 3893 to 3963 and 3991 to 3997 feet, are reported on page one.
We sincerely appreciate this opportunity to be of service to you,
F"CRMATICN NAME AND DEPTH INTERVAL: Yates 3893.0-3963.0F'EET OF' CORE RECOVERED F'ROMABOVE INTERVAL 64.6Jl'EET OF' COREINCLUoED IN AVERAIJEB
AVERAIIE PERMEABILITY:MILLIDARCYB
PRODUCTIVE CAPACITY:MILLIDARCY-F'EET
AVERAGE POROBITY: PER CENT
AVERAGE REBIDUAL OIL SATURATION:PER CENT OF' PORE SPACE
70.0
41.0
2.8
115
18.8
9.2
AVERAGE TOTAL WATER SATURATION:PER CENT OF' PORE BPACE
AVERAG'E CONNATE WATER BATURATION:PER CENT OF' PORE BPACE
OIL GRAVITY: °API
ORIGINAL BOLUTION GAB-OIL RATIO:CUBIC F'EET PER BARREL
ORIGINAL F'ORMATION VOLUME F'ACTOR: BARRELBSATURATED OIL PER BARREL STOCK-TANK OIL
CALCULATED ORIGINAL STOCK-TANK OIL IN PLACE:BARRELS PER ACRE-F'OOT
Calculated maximum solution gas drive recovery is barrels per acre-foot, assuming production could becontinued until reservoir pressure declined to zero psig. Calculated maximum water drive recovery isbarrels per acre-foot,assuming full maintenance of original reservoir pressure, 100% areal and vertical coverage,and continuation of production to 100%water cut. (Please refer to footnotes for further discussion of recovery estimates.)
F"CRMATICN NAME AND DEPTH INTERVAL: Yates 3991.0-3997.0F'EET OF' CORE RECOVERED F'ROMABOVE INTERVAL 58.5F'EET OF' CORE _INCLUDED IN AVERAGES
AVERAGE PERMEABILITY:MILLIDARCYS
PRODUCTIVE CAPACITY:MILLIDARCY-F'EET
AVERAGE POROSITY: PER CENT
AVERAGE RESIDUAL OIL SATURATION:PER CENT OF' PORE SPACE
6.0
6.0
9.6
58
22.4
14.5
AVERAGE TOTAL WATER SATURATION:PER CENT OF' PORE SPACE
AVERAGE CONNATE WATER SATURATION:PER CENT OF' PORE SPACE
OIL GRAVITY: °API
ORIGINAL SOLUTION GAS-OIL RATIO:CUBIC F'EET PER BARREL
ORIGINAL F'ORMATION VOLUME F'ACTOR: BARRELSSATURATED OIL PER BARREL STOCK-TANK OIL
CALCULATED ORIGINAL STOCK-TANK OIL IN PLACE:BARRELS PER ACRE-F'OOT
Calculated maximum solution gas drive recovery is barrels per acre-foot, assuming production could becontinued until reservoir pressure declined to zero psig. Calculated maximum water drive recovery isbarrels per acre-foot,assuming full maintenance of original reservoir pressure, 100% areal and vertical coverage,and continuation of production to 100%water cut. (Please refer to footnotes for further discussion of recovery estimates.)
These recovery estimates represent theoretical maximum values for solution gas and water drive. They assume that production isstarted at original reservoir pressure; i.e., 110 account is taken of production to date or of prior drainage to other areas. The effects offactors tending to reduce actual ultimate recovery, such as economic limits on oil production rates, gas-oil ratios, or water-oil ratios,have not been taken into account. Neither have factors been considered which may result in actual recovery intermediate between sola-tion gas and complete water drive recoveries, such as gas cap expansion, gravity drainage, or partial water drive. Detailed predictionsof ultimate oil recovery to specific abandonment conditions may be made in an engineering study in which consideration is given tooverall reservoir characteristics and economic factors.These analyses, opininns or interpretations are based on observations and materials supplied by the client to whom, and for whose exclusive and confidential use,this report is made. The interpretations or opinions expressed represent the best judgment of Core Laboratories, Inc. (all errors and omissions excepted); butCore Laboratories, Inc., and its officer-s and employees assume no respon sibif.ity and make no warranty or representation as to the productivity, proper operation,01" nrofituhleness of any oil. zas or other mineral well or sand in connection with which such renort is used or relied rmon.
Distribution of Final ReportsI
3 Copies The British-American Oil Producing Co.Box 474Midland, TexasAttention: Mr. C. E. Brandon
3 Copies The British-American Oil Producing Co.Box 474Midland, TexasAttention: Mr. J. V. Hardwic k
1 Copy The British-American Oil Producing Co.Box 749Dallas J Texas
