港浅8-6井区河道砂体储层预测的综合研究

Comprehensive study of channel sand prediction in GQ8-6 well block

中国石油天然气股份有限公司大港油田油气藏评价项目部, 天津 300280

Dagang Oilfield Reservoir Evaluting Project Department, PetroChina, Tianjing 300280, China

在对多种方法储层预测结果对比的基础上,采用三维可视化地震解释软件对大港油田港浅8-6井区明化镇组河道砂体进行了预测,提出了河道砂体三维可视化地震解释储层预测方法。其思路是:利用三维可视化解释软件的可视化解释功能,快速扫描数据体,寻找河道砂体,砂体与构造背景或与井点含油气信息结合寻找含油气潜力砂体,然后对潜力砂体进行预测和描述。该方法对于港东开发区平面上快速变化、纵向上频繁叠置的明化镇组曲流河薄砂体的预测取得了较好的效果,预测的NmⅢ4-2油层砂体已被完钻的7口新井所证实。三维可视化地震解释储层预测法可实现油层厚度仅为3.5-6.6m的河道薄砂体的精细描述。

Based on the correlation and evaluation to various reservoir predictionmethods, 3-D visualization seismic interpretation software is selected to predict theming-huazhen formation channel sand in the periphery of Gangdong development area, GQ8-6 well block, in Beidagang oilfield. Firstly, the data volume is quickly scanned by visualization interpretation function to search channel sand, then the sand body was connected with the structural setting or the oil-bearing information at well point to seek the potential sand, finally, the prediction and description to potential sand are carried out. Although thinmeandering sands change rapidly both horizontally and vertically, using above-mentionedmethod, we predict the reservoir accurately. The prediction accuracy to the information with a thickness of only 3.5-6.6m is proved by newly drilled 7 wells aiming at the NmⅢ4-2 of GQ8-6, The above-mentioned visualization predictionmethod can not only be used to predict thin fluvial sands, it can also provides reference to other reservoir predictionmethods.