四维地震技术在SAGD蒸汽腔监测中的应用

四维地震是油气藏监测中应用较广、效果较好的一项技术。针对辽河油田蒸汽辅助重力泄油(SAGD)开发中后期油藏监测手段单一、蒸汽腔及剩余油描述难等问题,本文结合前人研究成果,开展了四维地震监测可行性分析、地震数据归一化处理及属性差异分析等方面的研究,初步建立了利用时移地震属性差异预测隔夹层、识别蒸汽腔范围及前缘,以及刻画剩余油分布特征的基本方法。该技术在指导SAGD动态调整、剩余油挖潜中也取得较好的应用效果。

Time-lapse seismic in the steam chamber monitoring of SAGD

The 4D seismic is a widely used and well-perfected technology in reservoir monitoring.In the middle to late stage of the steam assisted gravity drainage (SAGD) development in Liaohe Oilfield,the identification of steam chambers and residual oil becomes more and more difficult.To solve the problem,a time-lapse seismic monitoring project is conducted.Based on previous researches,time-lapse seismic monitoring feasibility study is carried out.Time-lapse seismic data is normalized and its attribute differences are analyzed.With seismic attribute differences,inter-beds are predicted,steam chambers and the remaining oil distribution are characterized.The proposed approach has achieved good results in the guiding SAGD dynamic adjustment and remaining oil potential.