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Hydrocarbon reservoirs associated to layered intrusive bodies (view source)
Revision as of 18:19, 26 June 2015
, 18:19, 26 June 2015no edit summary
magma, where its volume is reduced contraction columnar cells formed orthogonal
magma, where its volume is reduced contraction columnar cells formed orthogonal
to the surface through which heat is lost.
to the surface through which heat is lost.
[[File:IMAGEN 8|thumbnail|Figure 8: Scheme of columnar fractures. Taken from Bermúdez & Delpino 2015.]]
[[File:IMAGEN 8.png|thumbnail|Figure 8: Scheme of columnar fractures. Taken from Bermúdez & Delpino 2015.]]
[[File:IMAGEN 9.png|thumbnail|Figure 9: Variation of fracture patterns in a vertical section of a sill. Taken from Bermúdez & Delpino 2015.]]
• Folding: the movement of material not only produces fracturing but also the folding of
the overlying material. These folds are important because they may constitute important
reservoirs and traps, even exploited in several basins in the world.
[[File:IMAGEN 10.png|thumbnail|Figure 10: 2D seismic conducted northeast of Rockall basin, North Sea Norway. Observe normal faults as a product to accommodate the deformation of the fold. Taken from Hansen & Cartwright 2006.]]
• Thermal Maturity: the intrusion of magma of high temperatures (up to 1200 ° C) has a
thermal effect on the country rock can get to promote maturation of hydrocarbons when
diagenetic conditions are not optima.
[[File:IMAGEN 11.png|thumbnail|Figure 11: modeling of the distribution and direction of migration of oil and gas after the intrusion and cooling of a lacolito in the north of the Neuquen Basin and into the Vaca Muerta Fm province of Neuquen, Argentina ]]
CONCLUSIONS:
The sill type intrusives are important reservoirs of hydrocarbons in sedimentary basins due
to intense secondary patency generated both in the country rock and the same intrusive
given by fracturing the formation of stratigraphic traps as fold forced and effects thermal
maturity they produce hydrocarbons by high temperature.
[[File:IMAGEN 12.png|framed|left|Figure 12: first stage in the construction of a sill. The levels correspond to greenish mudstones ( E in very low resistance GPa) .]]
[[File:IMAGEN 13.png|framed|center|Figure 13: the sill by injection magmatic growing thicker generating a concavo- planar geometry type (lacolith) and buoyancy force to fold layers.]]
[[File:IMAGEN 14.png|framed|right|Figure 14: last stage of intrusion. Important fracturing is generated at the vertices of lacolith by cooling in turn internally fracture (fracture columnar ) generating an internal reservoir and rock fractures box facilitates migration levels permeable sandy .]]
ACKNOWLEDGEMENTS:
This work is especially dedicated to Juan Spacapan who was the source of encouragement
and inspiration and whose studies on the subject will be a great contribution to global
knowledge about this type of reservoirs.
BIBLIOGRAPHY:
Baudino R., Delpino D., Rodriguez Monreal F., Villar H.J., Zencich S. Moedeling an atypical
petroleum system: A case study of hydrocarbon generation, migration and accumulation
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Geology 26 (2009) 590-605.
Bermúdez Adriana & Delpino Daniel. Concentric and radial joint systems within basic sills
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