苏里格25区块有效储集层空间展布特征研究与应用

Research and application of spatial distribution characteristics of effective reservoirsin Sulige 25 block

苏25区块位于苏里格气田中北部,经过多年开发,目前富集区井网基本完善,区内优质资源基本动用,可供钻探的目标很少,而富集区外围钻探程度相对较低,未动用储量品质差、落实程度低,稳产形势日趋严峻。为了提高开发效益,助推区块实现稳产开发,应用测井、地震、生产动态等资料对开发成熟区进行地质解剖,总结储集层地震响应特征,应用地震属性分析、河道砂体刻画等手段进行储集层预测;通过波阻抗反演、烃类检测的地震融合属性体协同约束建立地质模型,实现了三维地震资料在建模中的应用,进而分析有效储集层空间展布特征和分布规律,评价优选可建产有利区,取得了较好的钻探效果。

Su 25 block is located in the middle and north part of Sulige gas field. After years of development, the current well pattern in the enrichment area is basically perfect, the high-quality resources in the area are basically used, and few targets are available for drilling. However, the degree of drilling in the periphery of the enrichment area is relatively low, the quality of nonproducing reserves is poor, the degree of implementation is low, the situation of stable production is becoming increasingly serious. In order to improve development benefits and promote the stable production development of the block, the well logging, seismic and production dynamic data are used to carry out geological anatomy of developed areas and summarize the seismic response characteristics of the reservoirs. Seismic attribute analysis, channel sand body characterization and other means were applied to predict reservoirs. The geological model was established through the coordinated constraint of seismic fusion attribute body of wave impedance inversion and hydrocarbon detection, and the application of 3D seismic data in modeling was realized. The spatial distribution characteristics and distribution laws of effective reservoirs were further analyzed, favorable areas for productivity construction were evaluated and optimized, and good drilling results were achieved.