多地质条件约束下利用基于目标的方法模拟水下分流河道

Modeling Underwater Distributive Channel with Object-based Modeling Methods under Multiple Geologic Constraint Conditions

以我国东部某油田葡萄花油层为例,针对研究区处于开发早中期,井网较稀的具体特点,为了追求储层的整体形态与客观地质体的逼近,选择可以很好反映储层形态的基于目标的方法,在单井以及平面沉积相研究基础上,利用给定河道带中线延伸趋势以及垂向砂体分布概率的手段,模拟水下分流河道微相,达到了既能很好地再现河道几何形态,又能完全忠实于沉积来源,并且保证了模拟的单河道沿河道带的延伸方向展布。模拟给出了多个等概率的实现,通过对比以及抽稀井网的检验,模拟的结果较真实地再现了水下分流河道的微相分布。

By using the Putaohua sublayer in an oilfield in east China as an example and in consideration of the characters of the studied area being at the early stage of oil development with less well patterns,the object-based methods were chosen for better reflection of reservoir shapes for the purposes of presenting the overall reservoir shapes and objective geological approximation and on the basis of studying the sedimentary micro-facies of single well and plain area,the methods of linear expansion trends of given channels and vertical sand body distribution approximation were used to simulate the micro-facies of underwater distributive channels,thus the geometric shapes of the channels were represented and the sources of sediment were fully redisplayed to guarantee its expansion direction of the simulated single channel.in east of china.By dint of particular facies understanding of sedimentary environment,and in virtue of channel range trend and also vertical trend of channel sand thickness to modeling the underwater branch channel microfacies.The result shows that the realization of many equal-approximation is simulated,the result also indicates that the distribution of underwater distributive channel is actually represented by comparison.