Paleogeomorphology of the Lower Miocene Zhujiang Formation and its control on the depositional system in Panyu area, Pearl River Mouth Basin

Marine Origin Petroleum Geology ›› 2020, Vol. 25 ›› Issue (3) : 269-277.

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ISSN 1672-9854
CN 33-1328/P
PDF(3496 KB)
Marine Origin Petroleum Geology ›› 2020, Vol. 25 ›› Issue (3) : 269-277.
Technology and Applications

Paleogeomorphology of the Lower Miocene Zhujiang Formation and its control on the depositional system in Panyu area, Pearl River Mouth Basin

  • DAI Zong,HENG Liqun,SUN Runping,WANG Yahui,LUO Donghong,LIU Taixun,LIU Keyu,ZHANG Qingqing
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Abstract

Based on the data of seismic, logging and analysis, and the removal of the later structural influence, the sedimentary paleogeomorphology of Zhujiang Formation in Panyu Area is restored by considering the factors of decompression correction and paleobathymetry correction, and the influence of paleogeomorphology on the deposition of Zhujiang Formation is analyzed through sedimentary forward simulation. The results show that: (1) The method of using the top and bottom structural surface of the target layer after drilling depth correction to obtain the true thickness of the formation is more convenient and practical, and the restored result after well-seismic combination is more accurate; (2) The original formation thickness of the target layer can be restored more accurately by decompression correction according to different lithology; (3) The sedimentary palaeogeomorphology of Zhujiang Formation in Panyu area is characterized by high in the northeast and east, low in the southwest and south, and gentle in the whole. The micro fluctuation feature of the paleogeomorphology controls the microfacies distribution in the wave-dominated braided river delta; (4) When the paleogeomorphic parameters are consistent with the actual restoration results, the plane distribution of lithologic types of sedimentary process simulation can be well matched with the sedimentary strata.

Key words

palaeogeomorphology; residual stratum thickness; decompaction correction; sedimentary system; Zhujiang Formation; Panyu area; Pearl River Mouth Basin

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Paleogeomorphology of the Lower Miocene Zhujiang Formation and its control on the depositional system in Panyu area, Pearl River Mouth Basin[J]. Marine Origin Petroleum Geology. 2020, 25(3): 269-277
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