摘要
对西峰、镇北地区沉积相的认识先后经历了浊流沉积、水下扇、扇三角洲、河控三角洲沉积等几个阶段。本文主要以前人研究为基础，充分利用钻井资料，针对生产中出现的新问题，对该区沉积环境和沉积相进行了进一步的探讨。结合露头资料，通过对古水流方向及重矿物组合特征的研究，认为西峰地区长8沉积物源来自崇信县油水河方向，镇北地区长8沉积物源来自崆峒山方向。通过对长8期湖盆底床形态的恢复及砂体展布规律的分析．认为西峰地区长8为辫状河三角洲沉积相类型，镇北地区为扇三角洲沉积相类型。
The sedimentary characters of Xifeng and Zhenbei area were studied in this article. Facing on the new problems which appeared in exploration, the sedimentary envoirment and facies were researched again by using well logging data and outcrops data. At the same time, the directions of paleo-river, and the compounding characters of weight minerals were studied. According to these researches, Xifeng＇s sediments in chang 8 period, which belong to braided steam daha facies, were come from the direction of Ruishui river, and Zhenbei＇s sediments, which belong to fan delta facies, were come from the direction of Kongtong mountain. And the subfacies and mirco-facies were sorted and described fully. On the whole, Xifeng oilfield＇s braided steam delta＇s scale was bigger than zhenbei＇s fan delta. And in all facies, the front of braided steam delta subface was most advantageous.
关键词
西峰
镇北地区
长8油层
沉积相
Xifeng Zhenbei area
Chang8
Sedimentary facies
