A Study on Stratigraphic Erosion Thickness in Xihu Sag, the East China Sea Basin

Abstract

Abstract: Since Late Cretaceous, Xihn sag in the East China Sea basin underwent chasmic stage, depression stage and regional subsid-ing stage, shaping several extensive regional unconformities (seismic reflection interfaces) such as T⁰₂(hottom of Pliocene), T⁴₂ (bottom Miocene), T⁰₃(bottom of Oligocene), causing intensively stratigraphic erosion. This paper presents the basic principle and approach for cal-culating the stratigraphic erosion thickness by means of geologic analogy method, analyzes the affect of the erosion on oil-gas accumnla-tion by taking 26 major seismic line profiles in xihu sag as examples, and probes into the applicability of this approach.

Key words: East China Sea basin, Xihu sag, stratigraphic erosion, unconformity, correlation

CLC Number:

TElll.3

WANG Zhen, ZHANG Ming-li, WU Fa-dong, WANG Zi-yu, WANG Lin-sheng. A Study on Stratigraphic Erosion Thickness in Xihu Sag, the East China Sea Basin[J]. Xinjiang Petroleum Geology, 2005, 26(2): 175-177.

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A Study on Stratigraphic Erosion Thickness in Xihu Sag, the East China Sea Basin

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