Emplacement and dewatering of the world's largest exposed sand injectite complex

American Geophysical Union (AGU) - Tập 13 Số 8 - 2012
Timothy J. Sherry1,2, C. D. Rowe1,2, James Mori1, E. E. Brodsky1
1Earth and Planetary Sciences, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064, USA
2Now at Earth and Planetary Sciences, McGill University, 3450 University Street, Montreal, Quebec H3A 0E8, Canada

Tóm tắt

Sandstone injectites form by up or down‐section flow of a mobilized sand slurry through fractures in overlying rock. They act as reservoirs and high‐permeability conduits through lower permeability rock in hydrocarbon systems. The Yellow Bank Creek Complex, Santa Cruz County, California is the largest known exposure of a sandstone injectite in the world. The complex contains granular textures that record processes of sand slurry flow, multiple pore fluids, and dewatering after emplacement. The injection was initially mobilized from a source containing both water and hydrocarbons. The water‐sand slurry reached emplacement depth first, due to lower fluid viscosity. As the sand slurry emplaced, the transition from slurry flow to pore water percolation occurred. This transition resulted in preferred flow channels ∼6 mm wide in which sand grains were weakly aligned (laminae). The hydrocarbon‐sand slurry intruded the dewatering sands and locally deformed the laminae. Compaction of the injectite deposit and pore fluid escape caused spaced compaction bands and dewatering pipes which created convolutions of the laminae. The hydrocarbon‐rich sand slurry is preserved today as dolomite‐cemented sand with oil inclusions. The laminae in this injectite are easily detected due to preferential iron oxide‐cementation of the well‐aligned sand laminae, and lack of cement in the alternating laminae. Subtle textures like these may develop during sand flow and be present but difficult to detect in other settings. They may explain permeability anisotropy in other sand deposits.

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Tài liệu tham khảo

Addicott W. O., 1972, Society of Economic Paleontologists and Mineralogists, Pacific Section, Proceedings of the Pacific Coast Miocene Biostratigraphic Symposium, Bakersfield, California, 1

10.1016/j.palaeo.2005.04.027

10.1016/j.jsg.2009.03.020

10.1016/S0377‐0273(02)00404‐3

10.1046/j.1468-8123.2002.00026.x

Bramlette M. N., 1946, The Monterey formation of California and the origin of its siliceous rocks, U.S. Geol. Surv. Prof. Pap., 212

10.1029/2002JB002321

10.1111/j.1365-2117.2009.00455.x

10.1306/04090705181

10.1016/j.jsg.2008.03.012

Clark J. C., 1981, Stratigraphy, paleontology, and geology of the central Santa Cruz Mountains, California Coast Ranges, U.S. Geol. Surv. Prof. Pap., 1168

10.1038/nature03698

10.1130/G22937A.1

10.1130/B26099.1

10.1103/PhysRevLett.57.275

10.1111/j.1365‐3091.2004.00634.x

10.1306/02180908080

1990 Am. Assoc. of Pet. Geol. Bakersfield Calif. D. El‐Sabbagh R. E. Garrison R. E. Garisson Silica diagenesis in the Santa Cruz mudstone (upper Miocene) La Honda Basin California 123 132

10.1103/PhysRevE.52.819

10.1046/j.1365‐3121.2002.00412.x

Graham S. A., 1985, Tectonic, depositional and diagenetic history of Monterey Formation (Miocene), central San Joaquin Basin, California, AAPG Bull., 69, 385

10.1130/0016-7606(1995)107<0779:FPFMAA>2.3.CO;2

Hubbard S. M., 2007, Sand Injectites: Implications for Hydrocarbon Exploration and Production, 199

Hurst A., 2007, Sand Injectites: Implications for Hydrocarbon Exploration and Production, 1, 10.1306/M871209

10.1046/j.1468-8123.2003.00066.x

10.1111/j.1365‐2117.2010.00488.x

10.1029/97RG00426

10.1144/0016-764902-155

10.1144/0016‐764902‐025

10.1111/j.1365‐2117.2010.00471.x

10.1111/j.1365‐2117.2005.00262.x

10.1016/j.marpetgeo.2010.02.009

10.1016/j.sedgeo.2011.01.013

10.1029/2003GL018761

10.1063/1.555581

Leva M., 1959, Fluidization

10.1130/G22001.1

10.1111/j.1365-246X.2008.03929.x

10.1016/j.tecto.2010.11.012

10.1016/j.sedgeo.2009.07.003

10.1103/PhysRevLett.98.058001

10.1029/91WR02834

10.1029/2011RG000382

10.1046/j.1365-3091.2003.00572.x

Minisini D., 2006, Sand Injectites: Implications for Hydrocarbon Exploration, 185

10.1029/2010JB007583

10.2516/ogst:2002040

Phillips R. L.(1981) Depositional environments of the Santa Margarita Sandstone in the Santa Cruz Mountains California PhD dissertation 358 pp. Univ. of Calif. Santa Cruz Calif.

1990 Am. Assoc. of Pet. Geol. Bakersfield Calif. R. L. Phillips R. E. Garisson Depositional and structural controls on the distribution of tar sands in the Santa Cruz Mountains California 105 121

10.1016/j.tecto.2009.04.032

10.1111/j.1365‐3091.2011.01230.x

10.1103/PhysRevE.65.056131

10.1007/s00367-003-0142-1

10.2110/jsr.2009.062

1990 Am. Assoc. of Pet. Geol. Bakersfield Calif. R. G. Stanley R. E. Garisson Evolution of the Tertiary La Honda Basin central California 1 29

Stanley R. G., 2000, Proceedings of the 3rd Conference on Tectonic Problems of the San Andreas Fault System, 14

1999 Am. Assoc. of Pet. Geol. Bakersfield Calif. B. J. Thompson R. E. Garrison J. C. Moore R. E. Garrison A late Cenozoic sandstone intrusion west of Santa Cruz California: Fluidized flow of water‐ and hydrocarbon‐saturated sediments 53 747

Thompson B. J., 2007, Sand Injectites: Implications for Hydrocarbon Exploration and Production, 151

10.1144/0016‐76492010‐004

10.1144/0016-76492007-096

10.1016/S0301-9322(02)00105-2

10.1016/j.tecto.2011.05.015

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American Geophysical Union (AGU)

Tập 13 Số 8

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