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桥口地区位于东濮凹陷黄河南地区中央隆起带北端 ,是受兰聊断层和黄河断层控制的继承性背斜构造。沙一段是该区主要的储油层段 ,也是该区主要的滚动勘探开发目标层位 ,对其沉积环境进行识别 ,是对该区沙一段进行储层预测 ,了解储层的形态、分布 ,进而进行滚动勘探开发的重要环节。通过对该区沙一段储层进行的岩矿特征、生物化石特征、粒度分布特征、沉积构造特征、砂体分布发育特征的综合分析 ,作出了该区沙一段为淡水湖泊三角洲沉积特征的观点 ,主要发育三角洲前缘亚相和前三角洲亚相
The Qiaokou area is located at the northern end of the central uplift of the Huanghenan area in the Dongpu Depression and is an inherited anticline controlled by the Lanliao fault and the Yellow River fault. The first section of Shahe is the main reservoir section in this area and also the main target of rolling exploration and development in this area. The identification of sedimentary environment is to predict the reservoir shape and distribution in the first member of Shahejie formation and further Rolling exploration and development of an important part. Based on the comprehensive analysis of the lithofacies characteristics, the biological fossils characteristics, the grain size distribution characteristics, the sedimentary structure characteristics and the sand body distribution and development characteristics of the first member of the Shahejie Formation in this area, Mainly developed delta front subfacies and the former delta subfacies