渤海典型低孔低渗油藏储层预测及效果——以渤海A油田沙河街组二段为例

Reservoir Prediction and Result of Classical Eocene Shahejie-2 Reservoir with Low Porosity and Low Permeability in Oilfield A,Bohaiwan Basin

综合利用地震、钻井、测井等资料,从渤海A油田古近系沙河街组二段的地层发育特征入手,以砂体发育特征与地震资料响应的匹配关系为研究思路,探究古地貌分析、地震属性分析等手段对研究区沙二段储层预测的适用性。通过开展最大振幅之和的地震属性计算、已钻井砂体厚度趋势约束、古地貌联合校正的储层预测,表明在沙二段沉积时期研究区主要为沟谷与洼地被两凸起分隔的古地貌格局,有利储层主要发育在西南及东北古地貌低洼处,东北部是后期开发调整的潜力区。基于该储层预测方法的合理性得到了5口设计井实钻结果的检验,证实了该成果不仅有助于油田下步调整方案的制定和实施,而且储层预测的思路和方法也可供海上类似中深层油田借鉴。

Based on the results of reservoir prediction by calculating the seismic attribute of maximum amplitude, using the trend constraint of the thickness of drilled sand body and combining the correction with the palaeogeomorphology, it is shown that the palaeogeomorphological framework consisted of valleys and swales that were separated from two arches during Paleogene Shahejie-2 sedimentation in Oilfield A. It is believed that the potential reservoirs are distributed in the palaeogeomorphologically low-lying areas in the northeast and especially the southwest. These methods of this reservoir prediction have been proved effective by drilling results of five designed wells and helpful to the future development and implementation.