东濮凹陷杜寨构造三级层序地层格架内地震相-岩相识别

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。

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

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.