E Guevara, Bureau of Economic Geology, PBGSP Annual Meeting, 2/27-28/06, Austin, TX SPRABERRY AND DEAN SANDSTONES SPRABERRY AND DEAN SANDSTONES (LOWER PERMIAN, LEONARDIAN), (LOWER PERMIAN, LEONARDIAN), MIDLAND BASIN, WEST TEXAS - MIDLAND BASIN, WEST TEXAS - MATURE PETROLEUM RESERVOIRS, MATURE PETROLEUM RESERVOIRS, SIGNIFICANT REMAINING RESOURCES SIGNIFICANT REMAINING RESOURCES PBGSP Bureau of Economic Geology The University of Texas at Austin Edgar H. Guevara Edgar H. Guevara
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SPRABERRY AND DEAN SANDSTONES (LOWER PERMIAN, LEONARDIAN), MIDLAND BASIN, WEST TEXAS -
SPRABERRY AND DEAN SANDSTONES (LOWER PERMIAN, LEONARDIAN), MIDLAND BASIN, WEST TEXAS - MATURE PETROLEUM RESERVOIRS, SIGNIFICANT REMAINING RESOURCES PBGSP Bureau of Economic Geology The University of Texas at Austin. Edgar H. Guevara. THE SPRABERRY AND DEAN FOMATIONS - PowerPoint PPT Presentation
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E Guevara, Bureau of Economic Geology, PBGSP Annual Meeting, 2/27-28/06, Austin, TX
SPRABERRY AND DEAN SANDSTONESSPRABERRY AND DEAN SANDSTONES(LOWER PERMIAN, LEONARDIAN), (LOWER PERMIAN, LEONARDIAN),
MIDLAND BASIN, WEST TEXAS -MIDLAND BASIN, WEST TEXAS -
Bureau of Economic GeologyThe University of Texas at Austin
Edgar H. GuevaraEdgar H. Guevara
E Guevara, Bureau of Economic Geology, PBGSP Annual Meeting, 2/27-28/06, Austin, TX
THE SPRABERRY AND DEAN FOMATIONSTHE SPRABERRY AND DEAN FOMATIONS
• have been interpreted as low-stand, have been interpreted as low-stand, submarine-fan deposits, e.g., Handford submarine-fan deposits, e.g., Handford (1981); Sarg (1989); Tyler and others (1997)(1981); Sarg (1989); Tyler and others (1997)
• record terrigenous clastics transportrecord terrigenous clastics transport into the Midland Basin in the Early Permianinto the Midland Basin in the Early Permian
• include hydrocarbon reservoirs thatinclude hydrocarbon reservoirs that collectively contain >10 billion bbl OOIPcollectively contain >10 billion bbl OOIP
E Guevara, Bureau of Economic Geology, PBGSP Annual Meeting, 2/27-28/06, Austin, TX
SPRABERRY AND DEAN RESERVOIRSSPRABERRY AND DEAN RESERVOIRS
• Naturally fractured siltstones and sandstonesNaturally fractured siltstones and sandstones
• Low matrix porosity (<10%) locally enhancedLow matrix porosity (<10%) locally enhanced by mineral dissolution or reduced byby mineral dissolution or reduced by quartz and carbonate cementquartz and carbonate cement
E Guevara, Bureau of Economic Geology, PBGSP Annual Meeting, 2/27-28/06, Austin, TX
SPRABERRY AND DEAN RESERVOIRSSPRABERRY AND DEAN RESERVOIRS
• Low recovery (<10%)Low recovery (<10%)
• Short-lived wells are common, but some Short-lived wells are common, but some wells in waterflood areas have long wells in waterflood areas have long production historyproduction history