三维地震解释技术及其在苏北盆地溱潼凹陷的应用
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摘要
反射地震剖面是进行精准油气勘探的手段之一,对勘探目标的精确定位,要求不断提高和发展三维地震资料解释技术.本文以苏北盆地溱潼凹陷的地震解释为例,验证了切片、方差体检测、正演模型、三维可视化及平衡剖面等地震解释技术组合的效果.解释成果刻画出溱潼凹陷古近系是由上、下两个构造层序叠合的、复式层序地层格架,由北向南可划分出北部缓斜坡带、中央深洼带、南部断坡带等沉积古地理单元,为有利油气聚集相带的预测奠定了坚实的基础.
Reflection seismic profile is one of the most accurate methods of oil and gas exploration.Precise positioning of the exploration targets requires improving and developing 3D seismic data interpretation technology.As an example,some technologies,such as slicing,the variance body detection,forward modeling,3D visualization and balanced section are used to interpret 3D seismic profiles in Qintong depression in Subei Basin.Results of interpretation show that the Paleogene stratigraphic framework of Qintong depression is a superimposed and duplex sequence made up of the upper and lower tectonic sequences.From north to south,the depression can be divided into northern slow slope belt,the central deep depression belt and the south ramp belt as sedimentary palaeogeographic unit.This research laid a solid foundation for forecasting favorable oil and gas accumulation phase.
引文
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