稠油热采时移地震监测研究与应用

我国具有丰富的稠油资源,但国内外针对陆相薄互层稠油油藏热采动态的时移地震监测研究还很少.通过分析火烧油层对储层的影响,结合已有的岩石物理测量结果,建立了薄互层油藏火烧油层模型,开展了地震正演模拟研究,并给出了应用实例.结果表明,稠油热采(注蒸汽、火烧油层、注热水)会引起储层岩石和孔隙流体弹性特性的显著改变,从而导致明显的地震属性差异;时移地震可以用来划分油层中高温区范围,跟踪高温前缘等.在陆相薄互层稠油田热采开发中,利用时移地震来监测油田开发的全过程是可行的.

Study and application of time-lapse seismic monitoring for the thermal recovery of heavy oil reservoir

There are rich heavy oil resources in China,but it is very few for the study on time-lapse seismic monitoring for the thermal recovery of heavy oil in a thin inter-bed reservoir at home and abroad.By analyzing the effect of fire flooding on heavy oil reservoir and using laboratorial result,a thin inter-bed model is built and used for seismic forward modeling of fire flooding reservoir.And a field example is shown.Both of them show that thermal recovery(steam flooding,fire flooding or hot-water flooding) can cause the obvious changes of elastic properties of reservoir rock and pore fluid and the obvious seismic attribute difference.Time-lapse seismic can be used to map the high temperature extent in reservoir,to track the high temperature front and so forth.It is feasible for us to apply time-lapse seismic to the monitoring of thermal recovery of heavy oil reservoir.