Deeply buried, Early Cretaceous paleokarst terrane, southern Maracaibo Basin, Venezuela

Castillo, María Verónica; Mann, Paul

doi:10.1306/10120505034

Cited by 16 publications

(6 citation statements)

References 26 publications

(18 reference statements)

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“…Brown (1999) recognized karst pits 200-500 m in diameter in deep burial Miocene carbonate rocks of the Gippsland basin, southeastern Australia. Castillo & Mann (2006) identified subcircular features up to 600 m wide and about 100 m deep in the Lower Cretaceous carbonates of the Cogollo group in the southern Maracaibo Basin, Venezuela. These features were interpreted as sinkholes formed subaerially by tropical weathering during a wellknown eustatic drop in the sea level that occurred during the Aptian period in the Maracaibo region.…”

Section: Dimensions and Deformation Stylementioning

confidence: 93%

“…These features have been described in the Colorado Plateau, USA (Weir et al 1961;Cater 1970;Sugiura & Kitcho 1981;Gutiérrez 2004), southern Saskatchewan, Canada (Christiansen 1971;Gendzwill & Hajnal 1971;Christiansen & Sauer 2001), NE Spain (Gutiérrez 1996(Gutiérrez , 2014 and southern Hunan, China (Min et al 1997). Large collapse palaeosinkholes have also been identified through 3D seismic surveys in sedimentary basins of southern Australia (Brown 1999), Venezuela (Castillo & Mann 2006), the USA (McDonnell et al 2007), the Mediterranean Sea (Bertoni & Cartwright 2005;Lofi et al 2012) and the South China Sea (Sun et al 2013).…”

mentioning

confidence: 85%

“…Fossil collapse sinkholes are markers of large-scale deep-seated karstification that favoured the migration and/or accumulation of hydrocarbons in the Maracaibo basin, Venezuela (Castillo & Mann 2006), in the Fort Worth basin, Texas, USA (McDonnell et al 2007), and in the South China Sea basin (Sun et al 2013). Palaeosinkhole-hosted uranium deposits of a high economic importance have been exploited in China (Min et al 1997) and Arizona, USA (Wenrich & Titley 2008).…”

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confidence: 99%

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New insights into the genesis of the Miocene collapse structures of the island of Gozo (Malta, central Mediterranean Sea)

Arnedo

Tonelli

Gutiérrez

et al. 2015

JGS

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The large palaeosinkholes located in the NW of Gozo (central Mediterranean Sea, Malta) offer excellent exposures that provide information on the geometry and kinematics of large karst-related collapse structures. Detailed geological analysis of these peculiar palaeosinkholes indicates that deep-seated evaporite dissolution is the most feasible hypothesis to explain their formation, according to the following evidence. (1) Several structures have been formed by progressive foundering of cylindrical blocks with limited internal deformation as revealed by the synsedimentary subsidence recorded by their Miocene sedimentary fill. This subsidence mechanism is more compatible with interstratal dissolution of evaporites than karstification and cave development in limestone formations. (2) The dimensions and deformation style of the palaeosinkholes are similar to those of other collapse structures related to deep-seated dissolution of salt-bearing evaporites. (3) The arcuate monocline associated with some of these collapse structures is also a characteristic feature of subsidence related to dissolution of evaporites.\ud However, no major evaporite formations have been documented so far in the subsurface of the Malta Platform

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Section: Dimensions and Deformation Stylementioning

confidence: 93%

mentioning

confidence: 85%

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confidence: 99%

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New insights into the genesis of the Miocene collapse structures of the island of Gozo (Malta, central Mediterranean Sea)

Arnedo

Tonelli

Gutiérrez

et al. 2015

JGS

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“…Lower Ordovician carbonate fracture-cave reservoir is major oil and gas reservoir. Tectonic framework and faults are complex in this area, because of experienced more tectonic [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Relationship between Faults and Hydrocarbon Distribution in Tahe Oilfield Southeast Slope

Xu¹,

Gu²,

Gao³

2015

Proceedings of the 2015 6th International Conference on Manufacturing Science and Engineering

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Abstract. Fault in Tahe Oilfield southeast slope has a positive meaning for more oil and gas reservoir, it can be divided into eight groups. Three of them have significant control action for the gas-water including north-south, NNE and NEE. They have closely related with fracture and karst reservoir seam holes, karst cave reservoirs and fractured reservoirs. Mostly, they get through Ordovician bottom boundary, communicating the lower part of the oil source, and become oil and gas important channel to migration upward.

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“…Carbonate reservoirs have great exploration potential in the world. The carbonate reservoir during complex diagenetic evolution is highly heterogeneous with reformation by faulting, fracturing and karstification (Leythaeuser et al, 1995;Al-Aasma et al, 2000;Billi and Salvini, 2001;Lavoie and Chi, 2001;Cerepi et al, 2003;Castillo and Mann, 2006;Graham et al, 2006;Ferrill and Morris, 2008;Neilson and Oxtoby, 2008). Petroleum exploration in carbonate reservoirs in China started comparatively late, but significant discoveries have been made recently in the Tarim, Sichuan and Ordos basins (Jin et al, 1998;Kang et al, 2002;Jin 2004Jin , 2010Tang et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Early Palaeozoic carbonate reservoirs from the Yingshan Formation of Well block ZG-43 in Tazhong Low Rise, Central Uplift, Tarim Basin, NW China: geological features and controlling factors

Lan

Lü

et al. 2013

Geol. J.

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Marine carbonate reservoirs, as a focus of petroleum exploration and development in China, are involved with high exploration risk and prediction difficulty owing to high heterogeneity and diversity of reservoir beds. In the Tarim Basin, NW China, carbonate reservoirs host about 38% of the whole basin's hydrocarbon resources in a large prospecting area mainly distributed in the Cambrian and Ordovician rocks in central (Tazhong) and northern (Tabei) Tarim. Recently, a better understanding has been made of the karsted weathering crust at the top of the Lower Ordovician Yingshan Formation in the northern slope area of the Tazhong Low Rise, Central Uplift, Tarim Basin. As a new frontier of exploration, oil/gas distribution and controlling factors of carbonate reservoirs in the Yingshan Formation are not clearly understood. In this work, we investigated the reservoir beds and oil/gas properties in 13 wells in Well block ZG‐43 on the No. 10 structural belt in the Tazhong Low Rise, and studied hydrocarbon accumulation characteristics with seismic and geochemical data. The Yingshan Formation in Well block ZG‐43 is mainly composed of calcarenite, dolomitic limestone, dolomite, cryptite, as low porosity and low permeability reservoir beds, with fracture‐void porosity constituting the main reservoir pore space. Oil/gas is quasi‐layer distributed beneath the unconformity between the Yingshan and Lianglitag formations to a depth of 140 m. The oil in Well block ZG‐43 is condensate with low density, low viscosity, low sulphur, low resin, low asphaltene, and high wax. The gas is 87.3% methane, generally containing H2S. The oil/gas distribution pattern is oil in the east and gas in the west, and H2S content in the west is lower than that in the east. The controlling factors for hydrocarbon are multi‐source supply and multi‐phase charging, interstratal karstification, hydrothermal activity, structural location and sealing condition. A structural–lithological trap is the main type of oil/gas accumulation. Oil/gas distribution was clearly affected by strike–slip faults. Oil/gas with multi‐source supply and multi‐phase charging was controlled by favourable local palaeo‐highs, and affected by later karsting and hydrothermal activity, as well as gas invasion in the Himalayan (Cenozoic) period. Under the caprock of compact limestone in the third to fifth members of the Lianglitag Formation, oil/gas migrated up along the strike–slip fault planes, and moved laterally to both sides in a ‘T’ shape, and formed large‐scale quasi‐layer condensate gas reservoirs controlled by reservoir bed quality. Copyright © 2013 John Wiley & Sons, Ltd.

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Deeply buried, Early Cretaceous paleokarst terrane, southern Maracaibo Basin, Venezuela

Cited by 16 publications

References 26 publications

New insights into the genesis of the Miocene collapse structures of the island of Gozo (Malta, central Mediterranean Sea)

New insights into the genesis of the Miocene collapse structures of the island of Gozo (Malta, central Mediterranean Sea)

Relationship between Faults and Hydrocarbon Distribution in Tahe Oilfield Southeast Slope

Early Palaeozoic carbonate reservoirs from the Yingshan Formation of Well block ZG-43 in Tazhong Low Rise, Central Uplift, Tarim Basin, NW China: geological features and controlling factors

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