By Makhous, Monzer; Galushkin, Yu. I.
This e-book is dedicated to the sector of basin research, and particularly to the single- and two-dimensional modeling of the burial, thermal and maturation histories of sedimentary basins, within the context of comparing their hydrocarbon power. a brand new modeling approach is elaborated during this paintings and utilized to continental basins. specific awareness is paid to precise positive factors of basin evolution, together with the compaction of sediments deposited at a variable cost, erosion of the sedimentary strata and basement, intrusive and hydrothermal task, thermal activation and reactivation of the basement, lateral warmth trade of multiple-aged blocks of the oceanic and continental lithospheres, the leaping of spreading axes, and so forth. substitute tools are utilized for the keep an eye on of tectonic subsidence, isostasy and rheology, lithosphere stretching and thinning.
desk of Contents
1. The Geodynamic surroundings and a few Geomechanical facets of the Initiation and Evolution of Rift Basins
2. Numerical Reconstruction of the Burial and Thermal Histories of Sedimentary Basins within the laptop Galo approach for Basin Modeling: major rules of the approach
three. Numerical Reconstruction of the belief of Hydrocarbon capability of resource Rocks in the course of Basin's Burial historical past
four. research of Continental Sedimentary Basins within the Galo Modeling procedure
five. research of the Basins of Continental Passive Margins and Back-Arc facilities: Geodynamics, Thermal and Maturation Histories
record of Figures
checklist of Tables
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Additional info for Basin Analysis and Modeling of the Burial, Thermal and Maturation Histories in Sedimentary Basins
1996]. , 2001]. , 1988]. , 2001]. 6. As is known, maximum extension amplitudes are attained on transition from a continental lithosphere to an oceanic one. 3 is needed for the basement surface to reach the level of a “mantle geoid” and for the spreading initi- 1. The Geodynamic Setting and Some Geomechanical Aspects 33 ation. Then, the thickness of the oceanic lithosphere decreases from the initial value of about 33 km to 10 km. A direct estimation of the extension amplitude from the apparent displacement of fault planes (using seismic profile data) give, as a rule, smaller values than those obtained from comparing the crust thickness or those obtained from analysis of subsidence amplitudes of the basin basement [Artyushkov, 1993].
2001]. There are basins in whose history the lithosphere extension was an intermediate stage. In these basins, the rift grabens were formed in the sedimentary strata and then became buried in the course of subsequent sedimentation stages (Upper Cretaceous — Miocene Syrte Graben in Libya; Lower-Cretaceous Central and Viking grabens in the North Sea basin). Newman and White (1997) have estimated the extension amplitudes and the accompanying strain rates from an analysis of basement subsidence curves for about 2 000 sequences of sediments in various basins around the world.
The uniform subsidence without inverse movements has led to conditions where oil generation started in the Late Cretaceous (that is, when traps were formed in the Early Cretaceous reservoirs during the Laramie tectonic phase). The early generation of hydrocarbons was favorable to the trap fill up [Vysotskii and Kucheruk, 1978]. In the Late Cretaceous and Cenozoic, the weak short-term uplifts were followed by a series of rapid subsidences. Some of the horizons of relatively deep-sea clay sediments of that period are quite good caps [Artyushkov and Buer, 1987].