--> Abstract: Lacustrine Sequence Stratigraphy: A Theoretical Consideration, by X. Liu, W. E. Galloway, and J. Zhang; #90987 (1993).

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LIU, XIJIN, and WILLIAM E. GALLOWAY, Department of Geological Sciences, The University of Texas at Austin, TX; and JIE ZHANG, Department of Oceanography, Texas A&M University, College Station, TX

ABSTRACT: Lacustrine Sequence Stratigraphy: A Theoretical Consideration

Sequence stratigraphic concepts can be applied with modifications to lacustrine basin analysis. Individual lacustrine sequences can be defined, based on seismic and well data, by erosional/nondepositional surfaces and special lithological intervals. In contrast to marine settings where sediment supply is generally independent of sea level, high stand of lake level usually corresponds to high sediment supply; and depositional regression on one side is associated with transgression on another side of the basin. Dependent upon the origin and geographic locations of lacustrine basins, highstand deposits in a lacustrine sequence may consist mainly of clastic sediments, whereas lowstand deposits contain significant volume of carbonates, evaporites, and alluvium. Most of reservoir units in l custrine basins fond mainly during high stand of lake level.

While eustasy and sediment supply are considered to be the primary factors in controlling sequence development in marine settings, tectonics and climate play the dominant role in lacustrine sequence development. Lake level change and sediment supply are fundamentally a function of climate aid tectonics indrainage basins, and have little relationship to eustasy, although global climatic changes may affect both the oceans and lakes at the same time.

The lacustrine sequence stratigraphic model can be used to predict hydrocarbon reservoirs in many lacustrine basins around the world.

AAPG Search and Discovery Article #90987©1993 AAPG Annual Convention, New Orleans, Louisiana, April 25-28, 1993.