东海海礁凸起地球化学特征及含油气性分析

Geochemical Prospecting Characters & Analysis of Hydrocarbon Potential in the Haijiao Uplift, the East China Sea

张建培 须雪豪

Zhang Jianpei Xu Xuehao

上海海洋石油局规划设计研究院 上海 200120

Planning & Designing Institute of Shanghai Offshore Petroleum Bureau

油气化探是重要的油气勘查手段之一。海礁凸起是东海油气勘探程度较低并尚未钻探的重要地区。本文通过对海礁凸起进行多方法的海洋油气地球化学综合勘查与研究,对海底表层沉积物样品进行酸解烃、物上气、沉积物荧光、△C、甲烷碳同位素、三维荧光及轻烃指纹的技术分析,分析地球化学场的分布与结构,并结合地质、地球物理资料进行综合研究,剖析研究区的地球化学场场源、地球化学特征及异常的展布规律、地球化学指标组合特征及化探异常模式,并对海礁凸起的油气远景、油气性质及油气富集规律进行综合分析与探讨。

Hydrocarbon geochemical prospecting is one of the important methods of hydrocarbon exploration. Haijiao Uplift is an important area of low degree of hydrocarbon exploration that has no well in the East China Sea. In this paper, the offshore surface sediment testing data include absorbed gas component analysis, free gas component analysis, sediment fluorescence analysis, sediment 3-D fluorescence analysis, △C analysis, carbon isotope and light hydrocarbon fingerprinte analysis etc.. Comprehensive research these testing data, geological and geophysical data, geochemical abnormality genetic, geochemical characters, distribution regulation of geochemical abnormality, geochemical indexes association characters and modes of geochemical abnormality have been studied. By studying, hydrocarbon potential, distribution of hydrocarbon, types of hydrocarbon and concentration regulation of hydrocarbon have been analysed and discussed.