【摘要】 由于深水浊积水道油藏多位于深海区,受作业成本的限制,其开发井距往往较大,利用现行的针对密井网区的多井模式拟合方法进行该类油藏的地下储层构型表征,其精度较低。为此,利用西非尼日尔三角洲盆地深水区Akpo油田稀井条件下的钻井与地震资料,提出了基于井-震联合的该区深水浊积水道储层构型表征技术,论述了其表征思路与方法。深水浊积水道储层构型可分为水道体系、复合水道和单一水道3个层次,其中复合水道层次又可细分为复合水道系列和复合水道2个亚层次,不同层次构型单元规模差异大,需要在构型模式指导下,分别开展基于油组、小层及小层内部切片的井-震联合,将不同层次的构型模式与钻井、地震资料进行拟合,完成深水浊积水道的储层构型表征。这一研究不仅对高效开发深水浊积水道油藏具有实用价值,对利用井-震联合方法开展储层构型研究也具有重要参考价值。更多还原

【Abstract】 Deepwater turbidity channel reservoirs are usually located in deep sea areas,where a distant spacing pattern for development wells is often allocated due to the cost constraint of prospecting operation.Consequently,the characterization of such underground reservoir architectures of deepwater turbidity channels with the current overlay method for multi-well models used mainly under dense-well pattern conditions usually achieves a poor precision.Therefore,based on drilling and seismic data of a distant well spacing pattern for deepwater turbidity channel reservoirs of the Akpo oilfield in Niger Delta Basin,West Africa,we introduced a novel method to characterize such turbidity channel reservoir architectures in terms of well-to-seismic integration,and discussed its conception and procedures as well.Reservoir architectures of deepwater turbidity channels can be classified into three orders,channel system,channel complex and single channel.Of which the channel complex can be further subdivided into two suborders,channel complex series and channel complex.Various orders of architecture units differ significantly from each other in scale,thus,a well-to-seismic integration of individual oil measures,sublayers and internal sections within sublayers guided by architecture models should be applied to adapting an architecture model of different orders to downhole data(including dynamic data) and seismic information as well as to fulfilling the characterization of reservoir architectures of deepwater turbidity channels.This study will not only have a significantly economic value in efficiently developing deepwater turbidity channel reservoirs but also be of guiding significance for integrating well data with seismic data to characterize architecture elements.更多还原