The upper yingshan formation in tahe oil field is analyzed in the light of the theory of high - frequency sequence stratigraphy ; it comprise of 4 fourth - order sequences , including two progradation parasequence sets and two retrogradation parasequence sets , and 28 fifth - order sequences 由于四级层序、五级层序是受米兰科维奇天文周期控制的异旋同成因层序，横向变化不大，能够在大范围内追踪对比。
2.
In the profile , it is often made of one to two environment elements , which indicates a progradation or regression . the sand developed in this stage is equal to single sandbody which is the smallest scale for correlating between wells . middle term cycle is related to an obvious water changing 在中长期基准面低位处，储层大都发育较好，砂体厚度、展布面积均较大，物性相对较好，层间夹层较薄；而在中长期基准面较低位置处，则出现相反的储层特征。
3.
This paper presents the principle and the maximum resolution of the spectral imaging followed by taking a case study as an example to discuss the application of this technique to sedimentary facies classification and the practical significance of it in progradation and retrogradation identification of sedimentary environment 从理论基础分析出发，首先介绍了频谱成像的原理、最大分辨率，然后结合国内某油田的实际情况，阐述用频谱成像技术进行沉积相划分以及判断沉积环境水进水退的方法及实际效果。
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Many times structure movements of huanhua basin result in many times water progradation and retrogradation . cycle sediment in portrait and stratum lapout & denudation in plane and vary of different types sand body are resulted in sediment process . it provides better condition for subtle trap 研究表明，黄骅坳陷构造运动的多期性形成多次水进水退，在沉积上产生了纵向的多旋回性和平面上的地层超覆与剥蚀以及不同类型砂体的变化，为隐蔽油气藏的形成提供了良好条件，盆地中区是隐蔽油气藏较为集中的分布区。
