Abstract
Tide-dominated estuaries sedimentary reservoir is a hot area of sedimentology research in recent years, and the important target of oil and gas exploration is one of the relatively few sedimentary systems. Based on the study of underground reservoirs, outcrop and modern sedimentation, scholars believe that the estuary is a sedimentary system formed by transgressive system tract, which is composed of a complex subfacies environment with obvious changes. Its formation is influenced by many factors. The purpose of this paper is to simulate the deposition process of estuaries by Delft-3D software, and to reveal the main controlling factors of estuarine reservoir formation. The factors are as follows. 1) The size of the river flow has a destructive effect on the formation of the estuarine sand bar in the estuary, but the effect is small. 2) Tidal energy plays a constructive role in estuarine sand bars in estuaries, and it is also the main force for the formation of estuarine reservoirs. 3) The composition of the sediments has an obvious influence on the formation of the estuarine reservoir, and the content of the mud is an important factor for the retention of the estuarine sand bar.
Highlights
IntroductionAn estuary is a transgressive coastal environment at the mouth of a river, which receives sediment from both fluvial and marine sources, and that contains facies
Tide-dominated estuaries sedimentary reservoir is a hot area of sedimentology research in recent years, and the important target of oil and gas exploration is one of the relatively few sedimentary systems
3) The composition of the sediments has an obvious influence on the formation of the estuarine reservoir, and the content of the mud is an important factor for the retention of the estuarine sand bar
Summary
An estuary is a transgressive coastal environment at the mouth of a river, which receives sediment from both fluvial and marine sources, and that contains facies. The University of Duran in the Netherlands has developed a sedimentation numerical simulation software Delft-3D for estuarine and coastal management. It can simulate the sediment transport and accumulation process in estuaries under the interaction of rivers and tides. This paper attempts to use Delft-3D software to simulate tidal-dominated estuary reservoir It reveals the formation process of different types of reservoir sand bodies, and summarizes the main controlling factors of sand body formation in different reservoirs. It lays a foundation for sand body prediction and oil and gas exploration of tidal control estuary reservoir
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