基于DFN的页岩气储层裂缝建模研究  

Shale gas reservoir fracture modeling research base on discrete fracture network model

作　　者：王彬[1] 王军[2] 谭亦然[1] 汤勇[1] 缪尉杰 鄢雨[3] 唐弘程 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 [2]西南石油大学石油与天然气工程学院,四川成都610500 [3]中国石油新疆油田分公司准东采油厂,新疆阜康831511 [4]中海油能源发展股份有限公司工程技术深圳分公司,广东深圳518067

出　　处：《石油化工应用》2015年第12期62-65,73,共5页Petrochemical Industry Application

基　　金：国家重点基础研究发展计划(973计划)"超临界二氧化碳强化页岩气高效开发基础";项目编号:2014CB239200

摘　　要：针对页岩气储层天然裂缝发育的特征,建立采用DFN离散裂缝网络模型的裂缝性储层建模方法和思路。以页岩I区块为例,首先建立页岩气藏三维构造模型,采用序贯高斯模拟方法,建立页岩气藏基质属性模型,奠定了裂缝建模的基础;接着在地震属性体约束下,以裂缝密度、长度、倾角及方位角等数据建立裂缝密度分布模型;最后以裂缝密度模型为控制条件,采用离散裂缝网络技术建立裂缝网络模型及裂缝孔隙度、渗透率等属性模型。通过生产动态分析,该模型满足气藏数值模拟精度要求,能比较真实的描述页岩气储层天然裂缝的几何特征和分布形态。For the natural fracture-bearing shale gas reservoirs, an approach of discrete fracture network（DFN）model of fracture reservoir is used. For the shale gas of I block as an example, firstly, the three-dimensional structure model is established. Using sequential gauss random modeling established the matrix attribute model, laying a foundation for fracture and discrete crack model of coarsening. Secondly, according to the fracture density, length, az-imuth from well logging interpretation, the distribution of fracture density model is set up,un-der the constrain of the seismic fracture prediction attribute.Finally, fracture density distri-bution models as constraint conditions, the use of discrete fracture network（DFN）technology,establish the shale gas reservoir in this end block discrete fracture network model and the model of the fracture porosity, permeability and other properties. Through validation of the model analysis, the model can objectively fairly reflect the geometrical characteristics of the natural fracture and CBM reservoir distribution pattern for the blocks in shale reservoir nu-merical simulation provides a geological foundation and basis.

关 键 词：页岩气藏 裂缝建模 离散裂缝网络技术 裂缝密度模型 

分 类 号：TE319[石油与天然气工程—油气田开发工程]