Analysis of High-Resolution Sequence Stratigraphy in Sanzhao Depression of Putaohua oil-bearing layer, Songliao Basin

DOI

10.2991/978-94-6463-415-0_33How to use a DOI?

Keywords

high resolution sequence stratigraphy; shallow water delta; model of oil-bearing layer sedimentary; Putaohua oil-bearing layer; Sanzhao Depression; Songliao Basin

Abstract

Based on the high resolution sequence stratigraphy theory, and core, logging, modern sedimentary and ancient outcrop data, and with the analyses of the sedimentary dynamics and spatial overlay style for all levels of base level cycle, to make the lake flooding surfaces as sequence boundaries, Putaohua oil-bearing layer,eventually, is divided into one long-term base level cycle, two middle-term base level cycles and twelve short-term base level cycles. Researches show that: Putaohua oil-bearing layer has the sequence stratigraphic framework which controlled by uplift of syndepositional structure along the source layer thinning in the distal parts of delta, and its top and bottom gradually varied from northern sandstone to southern mudstone, called “sand mud docking” model; Putaohua oil-bearing layer has five kinds of short-term cycle structures, and base level rising semi cycle which has high accommodation primarily; shallow water deltaic depositional system, controlled by fluvial, is developed in Putaohua oil-bearing layer, the main microfacies sand bodies are flaser distributary channel and extensive sheet sand, other microfacies sand bodies less developed; Putaohua oil-bearing layer has the characteristics that water system is divided into Eastern and Western, and type of sand bodies is divided into North and South in plane, and has the sedimentary sequence evolution that quickly regressive in early stage, shock type lifting in medium-term, slowly transgression in late in vertical direction. Depended on the shallow water delta sequence stratigraphic framework which controlled by uplift of syndepositional structure, sedimentary characteristics of oil-bearing layer and the distribution of sand body and the pattern of oil and gas migration and accumulation control action, Putaohua oil-bearing layer, eventually, has been set up a model of oil-bearing layer sedimentary with different sedimentary evolution stages.

Copyright

© 2024 The Author(s)

Open Access

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TY  - CONF
AU  - Jiajun Jiang
PY  - 2024
DA  - 2024/05/14
TI  - Analysis of High-Resolution Sequence Stratigraphy in Sanzhao Depression of Putaohua oil-bearing layer, Songliao Basin
BT  - Proceedings of the 2023 9th International Conference on Advances in Energy Resources and Environment Engineering (ICAESEE 2023)
PB  - Atlantis Press
SP  - 313
EP  - 322
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-415-0_33
DO  - 10.2991/978-94-6463-415-0_33
ID  - Jiang2024
ER  -