摘要
潮道砂体是潮坪沉积体系中重要的储集体之一。以平湖油气田放鹤亭地区平湖组为例,依据岩心、分析化验和测井资料,利用现代沉积和水槽模拟实验,结合地震反演确定潮道砂体垂向和平面特征。研究结果表明,垂向上潮道砂体厚度大、粒度粗,层理特征反应了受潮汐影响的强水动力环境;现代沉积和水槽实验表明平面上潮道呈树状分布,潮道砂体越靠近陆地数量越多、规模越小、宽深比越大,表现为潮道不断分叉、数量多的特点。最后井震结合确立了目的层潮道砂体的展布特征,其结果与现代沉积和水槽实验总结的特征吻合性较好,验证并说明了潮道砂体分布的规律性。
The tidal channel sand body is one of the most important reservoirs in the tidal flat deposi- tional system. Using the modern analogue and flume experiment results as guides, according to the data from coring, analysis, testing, logging and seismic inversion, we established the characteristics of tidal channel sand body both vertically and horizontally for the Pinghu Formation in the Fangheting area of the Pinghu Oil field. The results show that the tidal channel sand body is thick and coarse, with typical beddings formed under strong hydrodynamic conditions in the tidal environment. Modern sedimentary observation and flume experiments indicate that tidal channels are distributed in a dendrit- ic pattern. Towards the land, they become narrower in shape, smaller in scale and larger in width- depth ratio, indicating the bifurcation of tidal channels. Both seismic and drilling data are used in this case to define the distributional features of tidal channel sand bodies. The results accord well with the modern analogue and the flume experiment results.
出处
《海洋地质前沿》
2013年第8期39-44,共6页
Marine Geology Frontiers
关键词
平湖油气田
平湖组
潮道砂体
平面分布
Pinghu Oilfield
Pinghu Formation
tidal channel sand body
plane distribution
