Abstract: The Neogene fluvial facies sand bodies in Huanghua depression of Bohai Bay Basin are an important shallow hydrocarbon accumulation unit. The well-logging data and computational methods of paleochannel hydrologic parameters are used for the discrimination and quantitative estimation on paleochannel single sand body thickness, the paleochannel sand body width and paleo-river types of Neogene fluvial facies in Huanghua depression. The research results show that the evolution laws of Neogene rivers in Huanghua depression show a change trend from low sinuosity river (braided river) to high sinuosity river, then to low sinuosity river again; the sand body scale of Neogene channel in Huanghua depression possesses a trend of gradually decreasing upwards; in space, the channel sand bodies of Yanshan uplift rivers in the northern depression are the most developed, followed by the Cangxian uplift rivers in the west, while the sand bodies of rivers in the southwest basin and Chengning uplift are less developed; the channel sand bodies of Neogene Guantao Formation in the northern and western Huanghua depression are better developed, adjacent to the underlying Paleogene source rocks, presenting a favorable hydrocarbon exploration prospect.

Key words: fluvial facies, Huanghua depression, Neogene, paleochannel sand bodies, quantitative estimation

摘要： 渤海湾盆地黄骅坳陷新近系河流相砂体是重要的浅层油气聚集单元，利用测、录井资料和古河道水文参数计算方法，对黄骅坳陷新近系河流相古河道单砂体厚度、古河道砂体宽度和古河型进行了判别和定量预测。研究结果表明：黄骅坳陷新近纪河流的演化规律具有由低弯度河（辫状河）转变为高弯度蛇曲河，再演化为低弯度河的变化趋势；黄骅坳陷新近系河道砂体规模具有向上逐渐减小的趋势；在空间上，坳陷北部的燕山隆起水系河道砂体最为发育，其次为西部的沧县隆起水系，盆地西南部水系和埕宁隆起水系砂体发育相对较差；黄骅坳陷北部和西部新近系馆陶组河道砂体更发育，并且靠近下伏古近系烃源岩，具有良好的油气勘探前景。

关键词: 河流相, 黄骅坳陷, 新近系, 古河道砂体, 定量估算