论文部分内容阅读
依据削截、上超等不整合标志将沙二段划分为两个地震层序,并选择了可靠性较高的外部几何形态、内部反射结构为主要特征参数,辅助以振幅、连续性,总结出工区内主要发育7种地震相类型。进而分层序勾绘了平面地震相图,发现两个层序地震相在纵向上具有继承性发育的特点。最终在陆相断陷湖盆地震相模式的指导下,综合岩心相、测井相的解释成果,成功实现地震相向沉积相的转化。认为工区主要发育辫状河、辫状河三角洲、扇三角洲、滩坝、浊积扇和湖相6种沉积相类型,并总结出当时沉积体系发育主要有3类模式。
Based on the unconformity marks such as cut-off and upper-supercholes, the Sha-2 Member is divided into two seismic sequences and the external geometry with higher reliability is selected. The internal reflection structure is the main characteristic parameter, which assists with amplitude and continuity There are 7 types of seismic facies in the work area. Furthermore, the phase diagram of the plane earthquake is delineated by layers and found that the two sequence seismic phases have the characteristics of inheritance in the vertical direction. Finally, under the guidance of the seismic facies model of the continental rift lacustrine basin, taking the interpretation of core facies and logging facies as an example, the transformation of facies facies facies sedimentary facies is successfully achieved. It is considered that there are six types of sedimentary facies such as braided river, braided river delta, fan delta, beach dam, turbidite fan and lacustrine in the work area, and concluded that there are mainly three types of sedimentary system development at that time.