Abstract
The study of sequence stratigraphy is an important part of sequence stratigraphy. Used the method of numerical simulation. The influence of water level rise, water level decline, water level rise and decline, and the influence of water level on the formation of the system tract in sedimentary cycle are discussed. In the transgressive system tract (TST), sediments are dominated by accretion; in the falling stage system tract (FST), sediment deposits with lateral accretion and few deposits of accretion. In the process of water level rise, the main system domains are vertical superposition. In the process of water level decline, each system area is staggered to each other on the plane and presents a “false isochronous” depositional feature on the profile. Under the water level continuous rise, the LST development, the HST developed slowly and the FST undeveloped; under the water level continuous decline, the FST and the LST development, the HST developed slowly, the TST undeveloped; under the water level rises first and then falls, the various system domains are well developed; under the water level first rise then drops, the HST development, the LST, the FST, and the TST systems tract no development.
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