基于随机扩展方法的致密油储层裂缝建模研究

发布时间：2018-04-02 01:30

本文选题：裂缝　切入点：建模　出处：《西南石油大学学报(自然科学版)》2017年01期

【摘要】：现有的储层裂缝建模方法大多忽略了储层裂缝扩展历史与裂缝属性随机分布特征之间的本质关系,所建裂缝模型多为不考虑断裂尖端扩展历史的静态模型,因而不可能给出有效的区域裂缝信息。针对裂缝建模难题,提出了基于裂缝扩展反演模型的裂缝建模方法。首先,基于裂缝扩展规律,采用扩展有限元方法,利用模拟退火技术,建立裂缝扩展反演模拟模型;然后,采用克里金模型和断裂力学模拟系统,综合构造和成像测井裂缝解释资料,构建多场趋势克里金估计模拟模型。选取大情字井地区青山口组扶余致密油层作为实验区,建立了该区块的裂缝扩展模型和裂缝分布模型。实验表明,构建的基于随机扩展有限元模拟的裂缝建模方法可以克服现有裂缝建模方法的不足,可提高裂缝性油藏的表征精度。
[Abstract]:Most of the existing reservoir fracture modeling methods ignore the essential relationship between the fracture propagation history and the random distribution of fracture attributes, and most of the fracture models are static models, which do not consider the history of fault tip expansion.Therefore, it is impossible to give effective regional fracture information.Aiming at the problem of fracture modeling, a fracture modeling method based on fracture propagation inversion model is proposed.First of all, based on the law of crack propagation, using extended finite element method and simulated annealing technology, the inverse simulation model of crack propagation is established, and then, the Kriging model and fracture mechanics simulation system are used.Based on the fracture interpretation data of structural and imaging logging, a simulation model of multiple field trend Kriging estimation is constructed.The Fushankou formation of Qingshankou formation is selected as the experimental area, and the fracture propagation model and fracture distribution model of the block are established.The experimental results show that the proposed fracture modeling method based on stochastic extended finite element simulation can overcome the shortcomings of existing fracture modeling methods and improve the characterization accuracy of fractured reservoirs.
【作者单位】：中国石油大学(华东)非常规油气与新能源学院;北京师范大学自然资源学院;
【基金】：国家自然科学基金(41402108) 山东省自然科学基金(ZR2014DL003)
【分类号】：P618.13;P631.81

【相似文献】