upper fan meaning in English

上部扇
上海底扇

Through predicting and estimating the third member of shahejie formation , this paper pointed that the fan delta front of the top third member shahejie formation in oubei area is a good - quality reservior sand - body , which was proved by the practical production . the upper fan - delta and the lower turbidite - fan sand - body are also good - quality reserviors
对沙三上、中、下的储层进行了综合预测和评价，指出在欧北地区沙三上的扇三角洲前缘为一套有利的储集砂体，这一点已为实际生产所证实。
Through predicting and estimating the third member of shahejie formation , this paper pointed that the fan delta front of the top third member shahejie formation in oubei area is a good - quality reservior sand - body , which was proved by the practical production . the upper fan - delta and the lower turbidite - fan sand - body are also good - quality reserviors
研究证明，沙三中暗色泥岩是有利的烃源岩，该套泥岩分布范围广、厚度和理深较大，且有机质丰度高、类型好、演化程度高，为本区油气供给提供了可靠的物质保障。