薄储层地震预测影响因素分析及研究方向探讨

Analysis of Influencing Factors on Seismic Prediction of Thin Reservoirs and Discussion on Its Research Direction

测井约束反演技术、地震属性技术等最为常用的叠后储层预测技术,由于受分辨率及多解性等因素的限制,很难获得较好的薄储层预测结果。通过高精度层序地层学、体系域和沉积相精细研究技术及多井砂层精细对比技术,从宏观上解决岩性体发育位置;在该基础上,以短期基准面旋回为研究单元,应用基于层序界面、最大洪泛面及地震参考标准层的地震属性分析技术,可以突破地震分辨率极限,对一个沉积旋回内储层的沉积演化进行地震属性解释,达到薄储层预测的目的。

In production study,the most common post-stack reservoir prediction technologies were logging constrained inversion and seismic attribute technologies,for which better result of thin reservoir prediction was difficult to be obtained due to the limitations of resolution,multiple solutions and other factors.The positions of lithological body development was confirmed macroscopically through the fine study of high-resolution sequence stratigraphy,system tract,sedimentary facies and correlation of multi-well sand bodies.On the basis of seismic attribute analysis,short-term baselevel cycle is used as a unit of study,the seismic attribute analytical technology based on the sequence boundary,maximum flooding surface and seismic reference layer is used,thus the reservoir sedimentary evolution within a short-term base-level cycles is reappeared on the application of seismic attribute interpretation by breaking through the limits of seismic resolution.The purpose of thin reservoir prediction is achieved.