基于界面约束法的曲流河点坝内部构型建模  

Study on characterization of point bar architecture based on surface constrain

作　　者：刘卫[1,2] 丁亚军[3] 彭光艳[3] 孟立新[3] 

机构地区：[1]中国石化胜利油田分公司博士后科研工作站,山东东营257002 [2]中国石化胜利油田分公司东辛采油厂,山东东营257061 [3]中国石油大港油田公司勘探开发研究院,天津300280

出　　处：《油气地质与采收率》2014年第3期33-35,40,共4页Petroleum Geology and Recovery Efficiency

基　　金：山东省博士后创新项目"普通稠油油藏基于储层构型的优势渗流通道研究"(201303046)

摘　　要：基于Petrel软件和界面约束法,提出了曲流河点坝内部构型建模方法,该方法以点坝内部构型模式和构型解剖研究成果为基础,生成以曲面分布的侧积层顶、底界面,再通过多级界面联合约束方法在点坝内部建立起储层结构模型,实现点坝内部构型的精细表征。为便于后期的数值模拟,建立了模型网格非均匀粗化的方法,解决了模型网格数与侧积层精度之间的矛盾。通过大港油区某曲流河点坝对建模方法的有效性进行了验证。结果表明,该方法建立的模型可以很好地体现河道、点坝及侧积层等不同级别构型单元的空间分布,同时模型网格数大幅降低,由粗化前1776500个网格数减少至672 896个,减少了62.1%。模型计算储量与实际储量误差为1.84%,计算累积产油量、累积产水量与实际值的误差分别为0.3%和0.03%,能反映油藏实际情况。A new surface constrain modeling method is proposed herein for the lateral accretion shale beds of point bar sand by usingPetrel. In order to characterize the internal configuration of point bar, top and bottom boundaries of the lateral accretion shale beds dis-tributing with curved surface are created based on the patterns and analysis results of point bar architecture, then the reservoir architec-ture model is established in the point bar sand by the method of multi-order surface constrain. For ease of numerical reservoir simula-tion, we designed the method of nonuniform grid upscaling to ensure the accuracy of the laterally-accreted mudstone model and reducethe grids. Then, the validity of the modeling method is validated in a point bar sand of Dagang oilfield. The results show that the model-ing can reflect the spatial distribution of different levels of architectural element such as channel sand body, point bar and lateral accre-tion interbeds, andthe resultcan characterize the internal configuration of point bar andreflect theactual situationinthereservoir.

关 键 词：储层构型 点坝 构型建模 精细表征 非均匀网格粗化 

分 类 号：TE111.2[石油与天然气工程—油气勘探]