In Wangzhuan Oilfield, there existed serious sensitivity in Es1 silty sandstone, it caused low efficient production for long time.
王庄油田沙一段粉细砂岩因敏感性严重，导致该油藏长期处于低效开发状态。
By studying sequence stratigraphy systematically, the high resolution sequence stratigraphic framework of Es1 in Hongxing area is established.
通过系统的层序地层学研究，建立了红星地区古近系沙一段的高精度层序地层格架。
Temperature, salty environment, reducing environment and some other control factors on biogas forming, accumulation and preservation of the Es1 in Yangxin Subsag are analyzed.
分析了地层温度、咸化环境和还原环境等因素对阳信洼陷沙一段生物气生成、聚集和保存的控制作用。
Nanpu depression volcanic rocks most beneficially reserviors develop in Beipu structural belt of Es3 period and Es1-3stage , secondly for the Nanpu No. 2 structural belt in Ng formation.
南堡凹陷火山岩最有利的勘探区带位于北堡构造带的沙3期和沙1-3期，其次为南堡2号构造带东营组。
In the Es1 Formation in Qikou Sag, the interlaminated coccolith limestone and mudstone develops extensively, in some literature, it is classified as "oil shale" because of the oil bearing.
歧口凹陷古近系沙河街组一段广泛发育颗石灰岩与泥岩的纹层状互层，因其含油而被误认为“油页岩”。
In the Es1 Formation in Qikou Sag, the interlaminated coccolith limestone and mudstone develops extensively, in some literature, it is classified as "oil shale" because of the oil bearing.
歧口凹陷古近系沙河街组一段广泛发育颗石灰岩与泥岩的纹层状互层，因其含油而被误认为“油页岩”。
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