【摘要】 大港油田埕海二区是一个典型的复杂断块油田,地质条件复杂。综合利用地震、测井及岩心分析、薄片鉴定等资料,对大港油田埕海二区沙三下亚段砂岩储层沉积特征进行了研究。首先,根据测井和岩心资料判断相标志和微相类型,识别出水下分流河道、分流间湾、河口坝、席状砂以及前扇三角洲泥5种微相类型。其次,利用地震反演做出沉积微相分布图。最后在微相研究的基础上,结合地震反演成果,建立了沉积相约束下的砂体模型。根据不同微相的物性统计结果,在相控模型的基础上预测了有利相带,并对区域井进行了试油分析。试油结果显示,两口井日产油超过20 t,日产气超过3万方。试油结果验证了相控模型的准确性。更多还原

【Abstract】 As a typical fault-block oilfield,Chenghai Oilfield has a complicated geological condition.A research on the sedimentary characters of sand reservoir of Es3 sub-section of Shahejie Formation is made of,making use of data of seismic,well logging,core analysis and so on.In the first stage,logging information and core data are used to analyze facies marks and determine the types of microfacies.Four kinds of microfacies are identified in this region which exhibits different features.In the second stage,seismic data is necessary to be analyzed to modify the previous results.The important step in this course is to make facies maps derived from seismic amplitudes.At last,results from both stages are combined to build up the 3D geological model.Based on this model,the favorable reservoirs can be predicted for guiding oilfield development in future.更多还原