石臼坨凸起东部斜坡带新近系录井综合解释

INTEGRATED INTERPRETATION OF NEOGENE MUDLOGGING DATA FROM SHIJIUTUO UPLIFT IN EAST SLOPE BELT OF BOHAI BAY

石臼坨凸起为渤海海域典型的复式油气聚集区,复杂的油气成藏导致录井资料在全井对比上差异性非常大。随着勘探的深入,在石臼坨凸起东部斜坡带解释符合率较低。对石臼坨凸起东部斜坡带的19口井534层储层进行了综合分析,分析资料包括气测、地化、电测、试油等数据。通过对比分析发现,错误主要集中在新近系的明下段和馆陶组储层,生物降解、荧光、气体组分在认识上存在一些偏差。将生物降解分类,优选参数,建立适应本地区的解释图板和阈值,符合率达到87.7%,效果非常好。东部斜坡带所建立的解释方法对整个石臼坨凸起以后的录井综合解释具有非常大的指导作用。

The Shijiutuo Uplift of Bohai Bay is a typical composite hydrocarbon accumulation,where correlation and interpretation of mud logging data are very difficult.The interpretation results always differ from different methods.In this paper,we made a comprehensive analysis of logging data from534 reservoirs of 19 wells on the Shijiutuo Uplift of the East Slope Belt.The mud logging data,such as gas logging,geochemical logging,E-logging,in addition to oil testing data,are carefully checked.It is found that errors and differences mainly occur in the Lower Minghuazhen Formation and Guantao Formation on biodegradation,fluorescence and gas component.For biodegradation,we made a reclassification and parameters reselection,and upon the basis established a local interpretation chart and some threshold numbers.Data consistency is then improved up to 87.7%.Therefore,the method used for this case is recommended for logging data interpretation.