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本文从盐源及形成环境两方面介绍了蒸发岩地层的成因,认为奈曼凹陷蒸发岩为陆相湖盆沉积,并剖析了奈曼凹陷蒸发岩地层的发育特征,在垂向上有明显的蒸发沉积序列,每一典型沉积旋回分为3层:旋回开始时为泥岩或薄层碳酸盐岩层;之上为膏质泥岩、泥膏岩、泥质膏盐岩、膏岩;最上部为膏盐岩及盐岩层。本文还总结了不同蒸发岩在测井资料上的响应特征,为准确的识别蒸发岩提供依据,最后详细的阐述了蒸发岩作为生油岩、盖层、油气运移载体及盐构造与油气藏的关系。
In this paper, the origin of evaporite formation is introduced from the aspects of salt source and formation environment. It is concluded that the evaporites in Neiman Sag are continental lacustrine sediments, and the development characteristics of evaporites in Neyman Sag are analyzed. There are obvious evaporite sedimentary sequences , Each typical sedimentary cycle is divided into three layers: the beginning of the cycle was a mudstone or thin carbonate layer; above the gypsum mudstone, mudstone, mudstone salt rock, gypsum rock; the upper part of the gypsum rock And salt rock layer. This paper also summarizes the response characteristics of different evaporites in logging data and provides the basis for accurate identification of evaporites. Finally, the evaporites are described in detail as source rock, caprock, hydrocarbon migration carrier, salt structure and reservoir Relationship.