Line 70: |
Line 70: |
| 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 |
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| + | related to igneous intrusions in the Neuquen Basin, Argentina. Marine and Petroleum |
| + | Geology 26 (2009) 590-605. |
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| + | and their associated porosity enhancement, Neuquén Basin, Argentina. National Council |
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