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泌阳凹陷南部陡坡带核三段发育了3种不同类型的沉积砂体:扇三角洲砂体、辫状河三角洲砂体、曲流河三角洲砂体。不同类型的砂体分布在凹陷区域的不同位置,受物源等地质条件的影响,其砂体沉积特征及储集性能和油气的分布均有明显的差异。通过对岩石组成、层理类型、内部相带的发育情况等的分析,阐述了3种类型沉积砂体的特征,并进一步对3种沉积砂岩的储集性能及其油气分布进行论述,从而为该地区的油气勘探开发提供依据。
Three different types of sedimentary sand bodies were developed in the third member of the steep slope belt in the southern part of Biyang depression: fan delta braided deltaic sand body and meandering deltaic sand body. Different types of sand bodies are distributed in different positions in the sag area. Due to geological conditions such as provenance, the sedimentary characteristics and reservoir properties of sand bodies and the distribution of oil and gas are obviously different. The characteristics of three types of sedimentary sand bodies are expounded by analyzing the composition of rocks, the types of stratification and the development of internal facies. The reservoir properties and distribution of the three kinds of sedimentary sandstones are further discussed. The area of oil and gas exploration and development to provide the basis.