000			04042nmc a2200325 4500
005			20260520010406.0
008			260224s2018 xxu esp
041			_aEspañol
082			_a068.82 553.28 C62 2018 0015658
245	0	0	_aRemovilización e inyección de arena en el paleoceno-eoceno de la Cuenca de Antepaís Magallanes, Chile _bCaracterísticas e implicancias para la exploración y producción petrolífera del paleógeno
260			_a _b _c2018
270			_a02/09/2025 ; 11/04/2019
300			_a24 p. ; 891-915
520			_aSand remobilization and injection is a common geological process in deep-water depositional systems in many basins worldwide. Recent outcrop observations and drilling, together with 3D seismic interpretations, indicate widespread remobilization and injection of sandy sediments in the Paleocene-Eocene of the Magallanes foreland Basin. The purpose of this contribution is twofold: (1) to characterize the remobilized and injected features and (2) to highlight its influence on the Tertiary petroleum system of the basin.In general, the Paleocene-Eocene stratigraphy of the Basin is dominated by marine fine-grained terrigenous punctuated by coarse-grained material, especially sandstones. In outcrops, 5 mm to ~1 m thick sandstone intrusions occur in mudstones and exhibit both simple and complex geometries with either upward or downward propagation. Contacts between injected sands and host strata are consistently sharp. Rafted clasts of the host lithology are locally embedded in the intrusions. In the subsurface, the study section lies at a depth of ~2300-6000 m and old and new drilling indicate that the section is locally overpressured. Seismically, the expression of interpreted deep-water channels in the foreland ramp domain is commonly chaotic but locally a wing-like amplitude anomaly is clearly seen. Some of these features were recently penetrated by several exploration wells. Well log correlations and recovered drill cores indicate they are gas-saturated channelized sandstones with evidence of remobilization and clastic injection, implying a new type of potential reservoirs for the basin. In well logs, where the reservoirs have been remobilized, the sands tend to occur in thick packages and the gamma-ray shape is commonly blocky. Farther west, in the foredeep component, gas shows and blowouts were recorded in similar deposits.The occurrence, both in outcrop and subsurface, of remobilized and injected sandstones in the Paleogene of the basin suggests that these events are widespread and more likely of regional scale. Because post-depositional deformation of a primary deposit can control reservoir architecture and maximum recovery, an understanding of the geometry and distribution of these hybrid-type reservoirs may provide important clues for future reservoir management, well planning and implementation of secondary recovery techniques (such as water injection). In addition, a better knowledge of these deposits may provide the base for more appropriate conceptual and numerical models for flow simulation at basin and reservoir scales. Although the Magallanes Basin is in a mature stage in the light of Cretaceous conventional resources, under the umbrella of the Tertiary potential, it continues to be attractive for further exploration.
773			_g
942			_cCONGTP
100	1		_aPinto, Jesús A. _958815
100	1		_aGonzález, Danilo L. _958816
100	1		_aMella, Pablo E. _958817
100	1		_aZapata, Ricardo A. _958818
100	1		_aAguirre, Guillermo F. _958819
100	1		_aCarpinelli, Aldo A. _958820
100	1		_aZurita, Enrique A. _958821
111	2		_aCongreso de Exploración y Desarrollo de Hidrocarburos (10mo. : 2018 nov. 5 - 9 : Mendoza) _9573
650		0	_aChile _92953
650		0	_aCuenca de Antepaís Magallanes _958822
650		0	_aInyección de arena _958823
999			_c192842 _d192842
856			_uhttps://biblioteca.iapg.org.ar/ArchivosAdjuntos/Conexplor2018/1719.pdf