致密薄储层综合预测技术在庆阳气田深层中的应用

Application of comprehensive prediction technology for deep and thin tight reservoir in Qingyang Gas Field

GeoEast系统解释技术在常规油气勘探领域取得了丰富成果。近来随着地震勘探面向更复杂构造,致密储层和非常规油气勘探受到广泛关注。针对庆阳气田深部山1段致密薄储层,应用GeoEast特色软件,通过恢复山1沉积期古地形,并与地震相分析、人工智能多属性联合分析技术相结合,刻画了薄砂体的展布特征;在此基础上,应用叠前弹性阻抗反演落实优质储层富集区域。经已钻井验证,所提地震方法预测的优质储层与实际钻井结果吻合率高达88%,较好地解决了该区深部致密薄储层预测问题,为庆阳气田滚动开发提供了有力的地震技术支撑。

The interpretation techniques of the GeoEast system have yielded fruitful results in conventional oil and gas exploration.In recent years,as seismic exploration faces more complex structures,tight reservoirs and unconventional oil and gas exploration are widely concerned.Regarding the deep and thin tight reservoirs in Shan 1member of Qingyang Gas Field,this paper employs the characteristic software GeoEast.The distribution characteristics of thin sand bodies are depicted through restoring paleotopography of Shan 1sedimentary period and combining with the seismic facies analysis and the multi-attribute joint analysis based on artificial intelligence.On this basis,prestack elastic impedance inversion is applied to determine the enrichment area of high-quality reservoirs.The coincidence rate between high-quality reservoirs predicted by the proposed seismic method and actual drilling results is up to 88%,which better solves deep and thin tight reservoir prediction problems in this area and provides strong seismic technical support for the rolling development and evaluation of Qingyang Gas Field.