基于地震波形结构特征的分流河道砂体储层构型

Reservoir configuration of distributary channel sand body based on the structural features of seismic waveforms

以东海西湖凹陷H气田渐新统花港组三角洲分流河道储层为研究对象,在井少、层深等条件下,通过井震结合,建立地震波形与砂体沉积演化之间的关系,总结了研究区2类7种地震波形类型。基于地震波形的结构特征,结合分流河道砂体展布规律、空间接触关系,形成了单峰型、双峰叠加型、双峰切叠型等3种分流河道砂体波形结构。识别出多期河道形态及接触关系,建立了纵向沉积演化规律,在该认识基础上部署的调整井取得了较好的效果。

By taking the fluvial reservoir of Oligocene Huagang formation in H gas field of Xihu sag in the East China Sea as the research object,under the conditions of few wells and deep layers,through the combination of well and seismic,the relationship between seismic waveform and sand body sedimentary evolution is established,and 2 types and 7 types of seismic waveforms in the study area are summarized.Based on the structural characteristics of seismic waveforms,combined with the distribution law and spatial contact relationship of distributary channel sand bodies,3 types of distributary channel sand body waveform structures,such as single peak type,double-peak superposed type and double-peak shear superposed type are formed.The multi-stage channel shape and contact relationship are identified,and the vertical sedimentary evolution law is established.The deployed adjustment wells based on this understanding have achieved good results.