南黄海盆地南五凹陷构造特征及有利勘探区带研究  

Structural Characteristics and Favorable Exploration Zones in Nanwu Sag of the South Yellow Sea Basin

作　　者：蒋彦 JIANG Yan(Institute of Exploration and Development,SINOPEC Shanghai Offshore Oil&Gas Company,Shanghai 200120,China)

机构地区：[1]中国石油化工股份有限公司上海海洋油气分公司勘探开发研究院,上海200120

出　　处：《海洋石油》2022年第4期1-6,共6页Offshore Oil

摘　　要：南黄海盆地南五凹陷是南黄海中新生代盆地最有利的成藏区域之一,具有良好的勘探潜力。但由于其构造特征复杂,一直未能取得油气勘探的突破。该文结合最新三维地震及钻井资料,在精细构造解释的基础上,对南五凹陷的构造特征进行分析,认为南五凹陷经历了断陷和拗陷两个大的构造演化阶段,主要发育两期三组正断裂。在断裂的控制作用下,发育三个局部构造带,以断鼻、断块圈闭为主。南五凹陷油气成藏具有近源近断成藏的特点,其中深大断裂的发育是油气输导的关键因素。通过研究,总结了南五凹陷构造特征及成藏关键因素,并提出了北部斜坡带发育深大断裂,圈闭条件好,可作为有利勘探区带,研究成果对南五凹陷勘探工作具有借鉴意义。Nanwu Sag of the South Yellow Sea Basin is one of the most favorable hydrocarbon accumulation areas in the MesozoicCenozoic Basin in the South Yellow Sea, with good exploration potential. However, due to its complex structural characteristics, no breakthrough has been achieved in oil and gas exploration. Using the latest 3D seismic and drilling data, this paper analyzes the structural characteristics of Nanwu Sag on the basis of fine structural interpretation. It is concluded that Nanwu Sag has experienced two major stages of tectonic evolution, fault depression and depression, with two stages and three groups of normal faults. Under the control of faults, three local structural belts are developed, mainly composed of fault nose and fault block traps. The hydrocarbon accumulation in Nanwu Sag has the characteristics of near-source and near-fault accumulation, and the development of deep and large faults is the key factor for hydrocarbon transport. Through the study, the structural characteristics and key factors of accumulation in Nanwu Sag are summarized, and it is proposed that the northern slope belt has deep and large faults, and good trap conditions, which is a favorable exploration zone.The study has reference significance for the exploration work of Nanwu Sag.

关 键 词：南黄海盆地 南五凹陷 断陷 构造演化 有利勘探区带 

分 类 号：P618.13[天文地球—矿床学]