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Oil and Gas Discouery Wells Drilled in New Mexico in 1Gg1

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Oil and Gas Discouery Wells Drilled in New Mexico in 1Gg1 Oiland gas discouery wells drilled in NewMexico in 1gg1 byRonald F. Broadhead, New Mexico Bureau of Minesand Mineral Resources Introduction completedin 1991,up 5% from the 1,549 up from 803completions in 1990;585 wells More wells were drilled for oil and sas wells completed in 1990but down 43% were completedas oil producersand 184 in New Mexicoin 1991than in tSgO.Oitu from the rccord 2,867 wells completed in wells were completed as gas producers obtained from the New Mexico Oil Con- 1981.In the PermianBasin, southeast New while 120wells were plugged and aban- servationDvision indicate1,b24 wells were Mexico,889 wells werecompleted in 199L, doned, resulting in a successrale of87Vo. In the San Juan Basin, northwest New Mexico,735 wells werecompleted int997, down from 746 completionsin 1990;57 wells were completedas oil producersand 655wells were completedas gas produc- Sali Jren Li L erswhile 23wells wereplugged and aban- doned, resulting in a successrate of.97Vo. In addition, two wells were completedin the west Bravo dome carbondioxide gas unit of southern Harding County. Three explorationand developmentwells were completedin Colfax County. Totalfootage of hole drilled in 1991was 5.522million ft, up 3% from 6.313million ft drilled in 1990. The average footage drilled per well in 1991was 4,015ft,59-ft lessthan the averagewell drilled in 1990. The downturn in drilling over the past 10 years has been accompaniedby seri- ously decreasedexploratory efforts. Sev- eral major oil companiesannounced reduction or elimination of onshore ex- ploration effortsin the United States.Ex- i-.liji iuli ploratory activity has rebounded \{J somewhat in the last three years, how- ever. The resurgencein exploration has a4 generally been led by independent op- lr,€iirA eratorsand smalleroil companies.During 1991, there was significant frontier ex- ploratory activity in Ratonand Tucumcari Alsoin thisissue lFJtSdlilc ir-.--* NMGS1992 abstracts o. 76 MiddleJurassic Summerville I 0 50 100mi H Significantgas discovery Formation p. j I 79 O Significantoil discovery NMG 0 50 100 150km subscriptioninformation p.92 e Significantdry holewith oit show NMGS1993 papers I A Wagon Moundgas pool callfor p. 93 I B Newkirkoit pool U Significantdry holewtth gas show Summaryof NewMexico I C Santa Rosa tar sands ! Significantdry hole statetaxes on natural I D BlackNo. 1 Ferriilwetl Q Significantwildcat well resourceproduction p. 93 driliing,not completed,"tight", Service/News p. or planned at end of 1990 94 Upcominggeologic meetings FIGURE-l-Significant p. 94 oil and gas discoveries,frontier wildcat wells, and horizontal wells drilled Indexto Volume14 are from Broadheadand King (1e88),Cather p. 95 :)::Y::::j::iry K.:kl|ryl,-Yjj9.-q"otogic_features (1978), fl111.I_1'_"" t1Yl, Kottlowski and Stewarr (1920),Meyer (1e66),rto]'.naar (7977), Statfnotes p. 96 lnompson and Jacka(1981), and Woodwardet al. (197g). Basins, the southeasternmostSan fuan six in Lea County, and three were signif- vician reservoirs in the BHP Petroleum Basin(Cabezon area), the Gallup-Zuni sag, icant as defined in this report; some dis- No. 1 Puffer State (3) and in the BHP Pe- the SacramentoMountains, the northern coverieswere extensionsof existingpools troleum No. 1 Conoco8 Federal(4). Gas rim of the PedregosaBasin, and in So- while others discoverednew pools within was discoveredin Abo red beds (Permian) corro County (Fig. 1). five miles of existing pools. The t7 Dela- southwest of the West PecosSlope pool For purposesof this report, a signifiunt ware Mountain discoverieswere more than in the Yates Petroleum No. L Blackwater wildut discoaeryis defined asa well in which the total number of discoveriesin all other Unit (1).Exploration for gason the North- commercialamounts of oil or gas were stratigraphic units in the Delaware Basin. west shelf was limited during 1991;main discoveredin a stratigraphicunit more than Other targets for oil exploration were targets were Abo sandstones. 5 miles from the limits of previously dis- Pennsylvanian and Wolfcampian (Lower Development drilling on the Northwest covered pools with commercialproduc- Permian) carbonates.Exploratory drilling shelf was slow in 191. Nevertheless,there tion from that stratigraphic unit. A for natural gas was concentrated mostly was significant development of oil reser- significantwildcat dry hole is defined as a in Morrowan and Atokan sandstones voirs in the shallow (2,000-6,000ft) Pad- dry hole that was drilled in a not-yet-pro- (Pennsylvanian). dock, Glorieta, SanAndres, Grayburg,and ductive basin or a part of a basin and in Development drilling in the Delaware Queen reservoirs (Permian) of southern which petroleum reservoirswere evalu- Basin was predominantly for oil during Chaves County and northern Eddy and ated. The locationsof significantwildcat 1991.As with exploratory drilling, the pri- northern Lea Counties. Development of wells that were completed in 1991 are mary targetswere shallow (4,000-5,000f0 Paddockand San Andres reservoirswas shown in Fig. 1. TableL summarizesthe DelawareMountain sandstones;more than especiallystrong in the Lovington and West significant wildcat discoveries and Table L20 development oil wells were success- Lovington pools. 2 summarizesthe significantwildcat dry fully completed in the Delaware sand- The Rooseveltuplift and adjacentareas holes.Table 3 summarizeswells in which stones during 7991.Activity was wide- were drilled sparselyduring 1991.No sig- horizontal drilling took place in New spread with significant numbers of wells nificant wildcat discoverieswere made and Mexico during 1991. Table 4 lists other drilled in the East Catclaw Draw, Living- exploration was minimal. Exploration was significant wildcat wells that were being ston Ridge, Lost Tank, and East Loving concentrated on finding traps in Siluro- drilled, were not completed,or were held pools of Eddy County and the Hat Mesa Devonian, Pennsylvanian, and Wolfcam- "tight" at the end of 799t. and Quail Ridge pools of Lea County. pian (Lower Permian)reservoirs. Eachwell is designatedby a number in Other major targets of development drill- Significant exploration took place in parenthesesthat refers to its location in ing for oil were the moderately deep (5,000- Otero County. A significant gas discovery Fig. 1 and its description in Tables1., 2, 10,000f0 basinal Bone Spring (Permian) was made in the Lower Pennsylvanian 3. or 4. carbonates,the deep (10,000-11,000f0 Wolfcampian carbonates,and moderately deep (7,000-10,000fD middle and upper SoutheastNew Mexico Pennsylvanian (Strawn, Cisco-Canyon) Drilling activity increasedin 199Lin the carbonates.Cisco and Canyon reservoirs three geologic subdivisions of the Per- were intensivelydeveloped in the North New AAexnc@ mian Basin:the DelawareBasin, the Cen- Dagger Draw and South Dagger Draw tral Basin platform, and the Northwest pools of northwest Eddy County. Mor- GEOLOGY shelf. Eleven significant wildcat discov- rowan and Atokan clastics (Lower Penn- eries were made in the Permian Basin sylvanian) were the main targets for gas . Scienceand Service during 1991(Fig. 1, nos. 1-11; Table 1, developmentdrilling during799l, but de- tssN 0196-94aX nos. 1-11). McKamey et al. (1988)pre- velopment of gas reservoirswas slow. Volume 14, No.4, November 1992 sentedstratigraphic charts of oil- and gas- No significant wildcat discoverieswere Editor:Carol A. Hjellming producing rock units in southeastemNew made on the Central Basin platform dur- Published quarterly by Mexico, as well as geoiogic summaries of ing 1991.There was, however,limited ex- New Mexico Bureau of Mines and oil and gas pools. ploration for oil in Blinebry, San Andres, Mineral Resources a division of New Mexico lnstitute of Four significantwildcat discoverieswere and Seven Rivers (Permian) carbonates. Mining & Tahnology made in the DelawareBasin during 199L. Development drilling was mostly for oil BOARD OF REGENTS Three discoverieswere in basinal sand- in the shallow (2,000-5,000ft) SanAndres, Ex-Officio stonesof the DelawareMountain Group. Grayburg, Queen, and YatesFormations Bruce King, Gooernorof Nru Merico Oil was discoveredin the (Permian) Alan Mor8an, Superintendentof Publiclnstruction DelawareCherry and in the moderately deep Appointed Canyon sandstonesin the Yates Petro- (5,000-7,000 ft) Drinkard and Blinebry Lt. Cen. Leo Marquez, Pres.,1989-195, Albuquerque leum No. 3 Lost Tank AIS State (5) and zones of the Yeso Formation (Permian). Charles Zimmerly, Sec.lTreqs.,1991-7997, Srcorro Diane D. Denish, 1992-1997,Albuquerque the YatesPetroleum No. 1 Unocal AHU Notable gas developmentwas in isolated J. Michael Kelly, L992-t997,Roswll Federal (5). Oil was found in Delaware gas zones in the YatesFormation at the Steve Torres, 1991-1997,Albuquerque Brushy New Mexico Institute of Mining & Technology Canyon sandstonesin the Ray |almat pool and in the Queen Formation President.. ... LaurenceH.Lattman WestallNo. 1 Federal30 (11).In a fourth at the Eumont pool. New Mexico Bureau of Mines & Mineral Resources well, the Mercury ExplorationNo. L Con- Seven significant wildcat discoveries Directorand StateGeologist. Charles E. Chapin nally Federal(10), Subsciptions:lssued quarterly, February, May, August, gas was discoveredin were made on the Northwest shelf during November; subscription price $6.00/calendaryear. the Cisco-Canyon (Pennsylvanian)sec- 1991despite relatively light drilling activ- Editorial matter: Articles submitted for publication tion. ity. On the southem part of the shelf, gas should be in the editor's hands a minimum of five (5) months
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