The Middle Miocene lobe-shaped and band-shaped submarine fans in the Lingshui Sag,Qiongdongnan Basin:source-to-sink system,genesis and implication  

作　　者：Xingzong Yao Congjun Feng Hongjun Qu Min Zhang Daming Li 

机构地区：[1]State Key Laboratory of Continental Dynamics,Northwest University,Xi’an 710069,China [2]Department of Geology,Northwest University,Xi’an 710069,China [3]Exploration and Development Technology Research Center of Yanchang Oilfield Co.,Ltd.,Yan’an 716000,China [4]Chexplor Resource Exploration Technology Co.,Ltd.,Huaibei 235000,China

出　　处：《Acta Oceanologica Sinica》2024年第4期61-79,共19页海洋学报（英文版）

基　　金：The National Natural Science Foundation of China under contract No.42372154。

摘　　要：Deepwater oil and gas exploration is the key to sustainable breakthroughs in petroleum exploration worldwide.The Central Canyon gas field has confirmed the Lingshui Sag is a hydrocarbon-generating sag,and the deepwater reservoirs in the Lingshui Sag still have more fabulous oil and gas exploration potential.Based on drilling data and three-dimensional(3D)seismic data,this paper uses seismic facies analysis,seismic attribute analysis,and coherence slice analysis to identify the types of submarine fans(lobe-shaped and band-shaped submarine fans)that developed in the Lingshui Sag during the Middle Miocene,clarify the source-to-sink system of the submarine fans and discuss the genesis mechanism of the submarine fans.The results show that:(1)the deepwater source-to-sink system of the Lingshui Sag in the Middle Miocene mainly consisted of a“delta(sediment supply)-submarine canyon(sediment transport channel)-submarine fan(deepwater sediment sink)”association;(2)the main factor controlling the formation of the submarine fans developed in the Lingshui Sag was on the relative sea level decline;and(3)the bottom current reworked the lobe-shaped submarine fan that developed in the northern Lingshui Sag and formed the band-shaped submarine fan with a greater sand thickness.This paper aims to provide practical geological knowledge for subsequent petroleum exploration and development in the deepwater area of the Qiongdongnan Basin through a detailed analysis of the Middle Miocene submarine fan sedimentary system developed in the Lingshui Sag.

关 键 词：submarine fan source-to-sink system genesis mechanism Middle Miocene Lingshui Sag 

分 类 号：P618.13[天文地球—矿床学]