塔木里盆地先巴扎地区志留系层序约束地震储层预测

APPLICATION OF SEISMIC RESERVOIR PREDICTION OF THE SILURIAN STRATA IN THE FRAMEWORK OF HIGH-RESOLUTION SEQUENCE STRATIGRAPY IN XIANBAZHA AREA

塔里木盆地先巴扎地区志留系碎屑岩地层岩性油气藏具有巨大的勘探潜力。在高分辨率层序地层学理论指导下,综合利用岩芯、测井、录井和三维地震数据,对先巴扎三维志留系进行高分辨层序地层研究,划分为2个三级旋回和5个四级旋回。在等时层序地层格架的约束下,开展精细储层地震属性分析、测井约束波阻抗反演、人机交互地震相分析,追踪和刻画滩相砂体,分析滩相砂体的叠置关系,开展砂体反演和储层预测,追踪识别5个四级旋回内的有效单砂体共11个,为地层岩性油藏勘探提供了重要依据。

The Xianbazha area in the Tarim basin has great potential in the exploration for stratigraphic lithologic traps in the Silurian.In this study,with the theory of high-resolution of sequence stratigrapy employed,through the drilling data analysis and 3D seismic interpretation,the sequence boundaries are identified and the framework of high-resolution sequence stratigrapy is established.Within the framework of strata,various kinds of reservoir sandbodies are predicted by methods of seismic attributes analysis,EI inversion and interactive seismic facies analysis.A model for exploration of stratigraphic lithologic traps in Silurian is developed and provides helpful aid to search for favorable conditions for formation of stratigraphic lithologic traps.