渗透率各向异性疏松砂岩脱砂压裂产能流固耦合模拟  

Fluid-solid coupling simulation of deliverability of screen-out fracturing in permeability anisotropy unconsolidated sandstone

作　　者：曲连忠[1] 程远方[1] 赵益忠[2] 沈海超[1] 贾江鸿[1] 赵寿强[1] 

机构地区：[1]中国石油大学石油工程学院,山东东营257061 [2]胜利油田采油工艺研究院,山东东营257000

出　　处：《中国石油大学学报（自然科学版）》2009年第2期70-74,共5页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家“863”高技术研究发展计划项目(2007AA06Z208)

摘　　要：基于广义达西定律,建立渗透率各向异性疏松砂岩脱砂压裂人工裂缝-油藏系统流固耦合模型,对储层渗透率各向异性对储层流固耦合作用及压裂井生产动态的影响进行分析。结果表明:储层渗透率各向异性会显著影响储层有效应力及物性参数的变化及分布;近裂缝壁面处,人工裂缝及渗透率各向异性共同影响储层物性参数变化,远离裂缝处,渗透率各向异性对储层参数变化起主导作用;当储层渗透率主轴方位角由0°增大至90°时,压裂井日产油量先增加后减小,当方位角达到60°左右时日产油量最大;当渗透率主轴方位角为0°时,垂直缝长方向的油藏渗透率对压裂井产能影响较大。A fluid-solid coupling model for the artificial fracture formed by top screen-out fracturing and reservoir system in permeability anisotropy unconsolidated sandstone was established based on generalized Darcy law. And the effects of permeability anisotropy of reservoir on the fluid-solid coupling effect and production performance of fractured well were analyzed. The results show that the permeability anisotropy of reservoir influences the alteration and distribution of effective stress and physical parameters of reservoir dramatically. The artificial fracture and permeability anisotropy influence the alteration of reservoir parameters simultaneously near the fracture surface, and the permeability anisotropy dominates the alteration of reservoir parameters far from the fracture. The daily oil production increases firstly and then decreases with the increment of the azimuth of permeability principal axis from 0° to 90°, and the daily oil production is maximal with the azimuth about 60°. The permeability cross the fracture influences the fracturing deliverability dramatically when the azimuth of permeability principal axis equals 0°.

关 键 词：渗透率 各向异性 疏松砂岩 压裂产能 流固耦合 

分 类 号：TE312[石油与天然气工程—油气田开发工程]