少井条件下储层相控建模研究

针对丽水凹陷南三维井区地质条件复杂,储层非均质性严重,钻井稀缺且分布不均等特点,常规的方法往往难以建立反映油藏实际地质情况的模型。本研究充分利用地震资料和有限的井资料,合理添加虚拟井点,进行无井区域的定量化表征,多条件约束建立储层的地质模型,提高了少井或无井地区储层预测模型的精度。建模实例表明,研究区整体呈现东高西低的地形特点,东次凹主要发育三角洲沉积体系,砂体分布较为连续,物性较好。通过单井相和地震相分析,结合砂体分布规律的研究,合理刻画了丽水凹陷南三维区的构造特征和储层发育情况。

In view of the complex geological conditions,strong reservoir heterogeneity,scarcity and uneven distribution of wells in the South 3D area of Lishui Sag.It is difficult to establish a model reflecting the actual geological conditions of the reservoir by conventional methods.This study makes full use of seismic data and well data to reasonably add virtual well points for quantitative characterization of particular regions.The multi-level constraint method is used to establish the geological model of the reservoir,whichs improve the accuracy of the reservoir prediction model in areas with few wells.It was indicated that the study area shows the topographic feature of high to low from the east to west.The eastern region mainly develops the delta sedimentary system,where the sand body distribution is relatively continuous and the physical properties are better.By working with the single well facies,seismic facies,and the sand body distribution,the structural characteristics and reservoir development in the South 3D area of Lishui Sag are described.