东濮凹陷杜寨构造三级层序地层格架内地震相-岩相识别

Identification of Seismic Facies-Lithofacies in Three-grade Sequence Stratigraphic Frameworks of Duzhai Structure in Dongpu Depression

东濮凹陷杜寨构造紧邻前梨园生油洼陷,油气资源量丰富。濮深12井在目的层段钻遇28m厚气层,但是其余各井的储层厚度变化大。因此,根据杜寨构造的储层发育及沉积特征,寻找厚储层是研究区勘探突破的关键。本文利用钻井资料,在三级层序格架内精细分析储层的纵向演化及横向展布特征,划分储层组合类型,根据正演模拟特征分析不同储层组合类型的地震反射特征,结合研究区的三维地震资料,以三级层序格架为约束,建立岩性-地震相的识别模型,为后期地震多属性岩性圈闭预测建立地质-地震之间的联系。

Duzhai structure is adjacent to Qianliyuan subset and is rich in oil and gas.A 28 mgas formation was penetrated by well PS-12.How to find thick reservoir is key factor which can lead to a new exploration discovery because The thickness of sandstone changes fast in this area.Character of reservoir distribution,types of reservoir combination and character of seismic reflection were analyzed within three-grade sequence stratigraphic frameworks by using drilling data and forward model.Together with 3-D seismic data,constrained by three-grade sequence stratigraphic frameworks,a Seismic Facies-Lithofacies model was established.The model will build relation between geology and seismic data for the coming reservoir prediction.