【摘要】 塔河油田Su地区石炭系卡拉沙依组砂体的埋藏深度较深,厚度一般小于10m,且横向变化较大,砂、泥岩之间的阻抗差异较小,地震资料不能区分砂泥岩,因此储层描述困难.为此,针对该区目的层段开展了测井约束地震反演研究.本文选用当前理论上较为突出,且实际应用中较为可靠的随机反演方法,同时将模拟退火全局优化方法引入进来,采用约束稀疏脉冲的反演结果作为随机反演的输入模型,大大提高了模型的精度,增强了随机反演的可靠性.通过对比分析,反演剖面的分辨率和信噪比有所提高,能较好地反映储层性质的横向变化,预测结果与实际钻井符合,证实该反演技术在该地区具有一定的实用性.更多还原

【Abstract】 The sand bodies of Carboniferous Karashayi formation in Tahe oil field are usually buried deeply,with a thickness of less than 10 m and a big lateral change.The resolution of seismic data can not differentiate sandstone from mudstone,making it difficult for reservoir description.In order to solve the problem,corresponding reservoir logging constrained seismic inversion methods are studied in the area.A new method proposed here by adopting inversion results of constrained sparse spike inversion as stochastic inversion input,would greatly enhance the modeling accuracy and stochastic inversion reliability.Simulated annealing algorithm of global optimization is also used.Comparison indicates that the resolution of Inversion and signal-noise ratio are raised,by which the lateral changes of reservoir properties are properly reflected with predicted result being correspondence to that of operation.It shows that the technique of high resolution logging constrained inversion is adaptive in the area.更多还原